diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,367 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,44 @@
+# Amazon QLDB Session SDK
+
+* [Version](#version)
+* [Description](#description)
+* [Contribute](#contribute)
+* [Licence](#licence)
+
+
+## Version
+ 
+`2.0` - Derived from API version @2019-07-11@ of the AWS service descriptions, licensed under Apache 2.0.
+
+## Description
+
+Documentation is available via [Hackage](http://hackage.haskell.org/package/amazonka-qldb-session)
+and the [AWS API Reference](https://aws.amazon.com/documentation/).
+
+The types from this library are intended to be used with [amazonka](http://hackage.haskell.org/package/amazonka),
+which provides mechanisms for specifying AuthN/AuthZ information, sending requests,
+and receiving responses.
+
+Lenses are used for constructing and manipulating types,
+due to the depth of nesting of AWS types and transparency regarding
+de/serialisation into more palatable Haskell values.
+The provided lenses should be compatible with any of the major lens libraries
+[lens](http://hackage.haskell.org/package/lens) or [lens-family-core](http://hackage.haskell.org/package/lens-family-core).
+
+See [Amazonka.QLDBSession](http://hackage.haskell.org/package/amazonka-qldb-session/docs/Amazonka-QLDBSession.html)
+or [the AWS documentation](https://aws.amazon.com/documentation/) to get started.
+
+
+## Contribute
+
+For any problems, comments, or feedback please create an issue [here on GitHub](https://github.com/brendanhay/amazonka/issues).
+
+> _Note:_ this library is an auto-generated Haskell package. Please see `amazonka-gen` for more information.
+
+
+## Licence
+
+`amazonka-qldb-session` is released under the [Mozilla Public License Version 2.0](http://www.mozilla.org/MPL/).
+
+Parts of the code are derived from AWS service descriptions, licensed under Apache 2.0.
+Source files subject to this contain an additional licensing clause in their header.
diff --git a/amazonka-qldb-session.cabal b/amazonka-qldb-session.cabal
new file mode 100644
--- /dev/null
+++ b/amazonka-qldb-session.cabal
@@ -0,0 +1,102 @@
+cabal-version:      2.2
+name:               amazonka-qldb-session
+version:            2.0
+synopsis:           Amazon QLDB Session SDK.
+homepage:           https://github.com/brendanhay/amazonka
+bug-reports:        https://github.com/brendanhay/amazonka/issues
+license:            MPL-2.0
+license-file:       LICENSE
+author:             Brendan Hay
+maintainer:
+  Brendan Hay <brendan.g.hay+amazonka@gmail.com>, Jack Kelly <jack@jackkelly.name>
+
+copyright:          Copyright (c) 2013-2023 Brendan Hay
+category:           AWS
+build-type:         Simple
+extra-source-files:
+  fixture/*.proto
+  fixture/*.yaml
+  README.md
+  src/.gitkeep
+
+description:
+  Derived from API version @2019-07-11@ of the AWS service descriptions, licensed under Apache 2.0.
+  .
+  The types from this library are intended to be used with <http://hackage.haskell.org/package/amazonka amazonka>,
+  which provides mechanisms for specifying AuthN/AuthZ information, sending requests, and receiving responses.
+  .
+  It is recommended to use generic lenses or optics from packages such as <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify optional fields and deconstruct responses.
+  .
+  Generated lenses can be found in "Amazonka.QLDBSession.Lens" and are
+  suitable for use with a lens package such as <http://hackage.haskell.org/package/lens lens> or <http://hackage.haskell.org/package/lens-family-core lens-family-core>.
+  .
+  See "Amazonka.QLDBSession" and the <https://aws.amazon.com/documentation/ AWS documentation> to get started.
+
+source-repository head
+  type:     git
+  location: git://github.com/brendanhay/amazonka.git
+  subdir:   amazonka-qldb-session
+
+library
+  default-language: Haskell2010
+  hs-source-dirs:   src gen
+  ghc-options:
+    -Wall -fwarn-incomplete-uni-patterns
+    -fwarn-incomplete-record-updates -funbox-strict-fields
+
+  exposed-modules:
+    Amazonka.QLDBSession
+    Amazonka.QLDBSession.Lens
+    Amazonka.QLDBSession.SendCommand
+    Amazonka.QLDBSession.Types
+    Amazonka.QLDBSession.Types.AbortTransactionRequest
+    Amazonka.QLDBSession.Types.AbortTransactionResult
+    Amazonka.QLDBSession.Types.CommitTransactionRequest
+    Amazonka.QLDBSession.Types.CommitTransactionResult
+    Amazonka.QLDBSession.Types.EndSessionRequest
+    Amazonka.QLDBSession.Types.EndSessionResult
+    Amazonka.QLDBSession.Types.ExecuteStatementRequest
+    Amazonka.QLDBSession.Types.ExecuteStatementResult
+    Amazonka.QLDBSession.Types.FetchPageRequest
+    Amazonka.QLDBSession.Types.FetchPageResult
+    Amazonka.QLDBSession.Types.IOUsage
+    Amazonka.QLDBSession.Types.Page
+    Amazonka.QLDBSession.Types.StartSessionRequest
+    Amazonka.QLDBSession.Types.StartSessionResult
+    Amazonka.QLDBSession.Types.StartTransactionRequest
+    Amazonka.QLDBSession.Types.StartTransactionResult
+    Amazonka.QLDBSession.Types.TimingInformation
+    Amazonka.QLDBSession.Types.ValueHolder
+    Amazonka.QLDBSession.Waiters
+
+  build-depends:
+    , amazonka-core  >=2.0  && <2.1
+    , base           >=4.12 && <5
+
+test-suite amazonka-qldb-session-test
+  type:             exitcode-stdio-1.0
+  default-language: Haskell2010
+  hs-source-dirs:   test
+  main-is:          Main.hs
+  ghc-options:      -Wall -threaded
+
+  -- This section is encoded by the template and any modules added by
+  -- hand outside these namespaces will not correctly be added to the
+  -- distribution package.
+  other-modules:
+    Test.Amazonka.Gen.QLDBSession
+    Test.Amazonka.QLDBSession
+    Test.Amazonka.QLDBSession.Internal
+
+  build-depends:
+    , amazonka-core          >=2.0 && <2.1
+    , amazonka-qldb-session
+    , amazonka-test          >=2.0 && <2.1
+    , base
+    , bytestring
+    , case-insensitive
+    , tasty
+    , tasty-hunit
+    , text
+    , time
+    , unordered-containers
diff --git a/fixture/SendCommand.yaml b/fixture/SendCommand.yaml
new file mode 100644
--- /dev/null
+++ b/fixture/SendCommand.yaml
@@ -0,0 +1,10 @@
+---
+method: POST
+headers:
+  Authorization:         AWS4-HMAC-SHA256 Credential=access/20091028/us-east-1/session.qldb/aws4_request, SignedHeaders=content-type;host;x-amz-content-sha256;x-amz-date, Signature=?
+  Host:                  session.qldb.us-east-1.amazonaws.com
+  Content-Type:          application/x-www-form-urlencoded; charset=utf-8
+  X-Amz-Content-SHA256:  abcdef
+  X-Amz-Date:            20091028T223200Z
+body:
+  ''
diff --git a/fixture/SendCommandResponse.proto b/fixture/SendCommandResponse.proto
new file mode 100644
--- /dev/null
+++ b/fixture/SendCommandResponse.proto
diff --git a/gen/Amazonka/QLDBSession.hs b/gen/Amazonka/QLDBSession.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession.hs
@@ -0,0 +1,173 @@
+{-# OPTIONS_GHC -fno-warn-duplicate-exports #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- |
+-- Module      : Amazonka.QLDBSession
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+--
+-- Derived from API version @2019-07-11@ of the AWS service descriptions, licensed under Apache 2.0.
+--
+-- The transactional data APIs for Amazon QLDB
+--
+-- Instead of interacting directly with this API, we recommend using the
+-- QLDB driver or the QLDB shell to execute data transactions on a ledger.
+--
+-- -   If you are working with an AWS SDK, use the QLDB driver. The driver
+--     provides a high-level abstraction layer above this /QLDB Session/
+--     data plane and manages @SendCommand@ API calls for you. For
+--     information and a list of supported programming languages, see
+--     <https://docs.aws.amazon.com/qldb/latest/developerguide/getting-started-driver.html Getting started with the driver>
+--     in the /Amazon QLDB Developer Guide/.
+--
+-- -   If you are working with the AWS Command Line Interface (AWS CLI),
+--     use the QLDB shell. The shell is a command line interface that uses
+--     the QLDB driver to interact with a ledger. For information, see
+--     <https://docs.aws.amazon.com/qldb/latest/developerguide/data-shell.html Accessing Amazon QLDB using the QLDB shell>.
+module Amazonka.QLDBSession
+  ( -- * Service Configuration
+    defaultService,
+
+    -- * Errors
+    -- $errors
+
+    -- ** BadRequestException
+    _BadRequestException,
+
+    -- ** CapacityExceededException
+    _CapacityExceededException,
+
+    -- ** InvalidSessionException
+    _InvalidSessionException,
+
+    -- ** LimitExceededException
+    _LimitExceededException,
+
+    -- ** OccConflictException
+    _OccConflictException,
+
+    -- ** RateExceededException
+    _RateExceededException,
+
+    -- * Waiters
+    -- $waiters
+
+    -- * Operations
+    -- $operations
+
+    -- ** SendCommand
+    SendCommand (SendCommand'),
+    newSendCommand,
+    SendCommandResponse (SendCommandResponse'),
+    newSendCommandResponse,
+
+    -- * Types
+
+    -- ** AbortTransactionRequest
+    AbortTransactionRequest (AbortTransactionRequest'),
+    newAbortTransactionRequest,
+
+    -- ** AbortTransactionResult
+    AbortTransactionResult (AbortTransactionResult'),
+    newAbortTransactionResult,
+
+    -- ** CommitTransactionRequest
+    CommitTransactionRequest (CommitTransactionRequest'),
+    newCommitTransactionRequest,
+
+    -- ** CommitTransactionResult
+    CommitTransactionResult (CommitTransactionResult'),
+    newCommitTransactionResult,
+
+    -- ** EndSessionRequest
+    EndSessionRequest (EndSessionRequest'),
+    newEndSessionRequest,
+
+    -- ** EndSessionResult
+    EndSessionResult (EndSessionResult'),
+    newEndSessionResult,
+
+    -- ** ExecuteStatementRequest
+    ExecuteStatementRequest (ExecuteStatementRequest'),
+    newExecuteStatementRequest,
+
+    -- ** ExecuteStatementResult
+    ExecuteStatementResult (ExecuteStatementResult'),
+    newExecuteStatementResult,
+
+    -- ** FetchPageRequest
+    FetchPageRequest (FetchPageRequest'),
+    newFetchPageRequest,
+
+    -- ** FetchPageResult
+    FetchPageResult (FetchPageResult'),
+    newFetchPageResult,
+
+    -- ** IOUsage
+    IOUsage (IOUsage'),
+    newIOUsage,
+
+    -- ** Page
+    Page (Page'),
+    newPage,
+
+    -- ** StartSessionRequest
+    StartSessionRequest (StartSessionRequest'),
+    newStartSessionRequest,
+
+    -- ** StartSessionResult
+    StartSessionResult (StartSessionResult'),
+    newStartSessionResult,
+
+    -- ** StartTransactionRequest
+    StartTransactionRequest (StartTransactionRequest'),
+    newStartTransactionRequest,
+
+    -- ** StartTransactionResult
+    StartTransactionResult (StartTransactionResult'),
+    newStartTransactionResult,
+
+    -- ** TimingInformation
+    TimingInformation (TimingInformation'),
+    newTimingInformation,
+
+    -- ** ValueHolder
+    ValueHolder (ValueHolder'),
+    newValueHolder,
+  )
+where
+
+import Amazonka.QLDBSession.Lens
+import Amazonka.QLDBSession.SendCommand
+import Amazonka.QLDBSession.Types
+import Amazonka.QLDBSession.Waiters
+
+-- $errors
+-- Error matchers are designed for use with the functions provided by
+-- <http://hackage.haskell.org/package/lens/docs/Control-Exception-Lens.html Control.Exception.Lens>.
+-- This allows catching (and rethrowing) service specific errors returned
+-- by 'QLDBSession'.
+
+-- $operations
+-- Some AWS operations return results that are incomplete and require subsequent
+-- requests in order to obtain the entire result set. The process of sending
+-- subsequent requests to continue where a previous request left off is called
+-- pagination. For example, the 'ListObjects' operation of Amazon S3 returns up to
+-- 1000 objects at a time, and you must send subsequent requests with the
+-- appropriate Marker in order to retrieve the next page of results.
+--
+-- Operations that have an 'AWSPager' instance can transparently perform subsequent
+-- requests, correctly setting Markers and other request facets to iterate through
+-- the entire result set of a truncated API operation. Operations which support
+-- this have an additional note in the documentation.
+--
+-- Many operations have the ability to filter results on the server side. See the
+-- individual operation parameters for details.
+
+-- $waiters
+-- Waiters poll by repeatedly sending a request until some remote success condition
+-- configured by the 'Wait' specification is fulfilled. The 'Wait' specification
+-- determines how many attempts should be made, in addition to delay and retry strategies.
diff --git a/gen/Amazonka/QLDBSession/Lens.hs b/gen/Amazonka/QLDBSession/Lens.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Lens.hs
@@ -0,0 +1,124 @@
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-duplicate-exports #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Lens
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Lens
+  ( -- * Operations
+
+    -- ** SendCommand
+    sendCommand_abortTransaction,
+    sendCommand_commitTransaction,
+    sendCommand_endSession,
+    sendCommand_executeStatement,
+    sendCommand_fetchPage,
+    sendCommand_sessionToken,
+    sendCommand_startSession,
+    sendCommand_startTransaction,
+    sendCommandResponse_abortTransaction,
+    sendCommandResponse_commitTransaction,
+    sendCommandResponse_endSession,
+    sendCommandResponse_executeStatement,
+    sendCommandResponse_fetchPage,
+    sendCommandResponse_startSession,
+    sendCommandResponse_startTransaction,
+    sendCommandResponse_httpStatus,
+
+    -- * Types
+
+    -- ** AbortTransactionRequest
+
+    -- ** AbortTransactionResult
+    abortTransactionResult_timingInformation,
+
+    -- ** CommitTransactionRequest
+    commitTransactionRequest_transactionId,
+    commitTransactionRequest_commitDigest,
+
+    -- ** CommitTransactionResult
+    commitTransactionResult_commitDigest,
+    commitTransactionResult_consumedIOs,
+    commitTransactionResult_timingInformation,
+    commitTransactionResult_transactionId,
+
+    -- ** EndSessionRequest
+
+    -- ** EndSessionResult
+    endSessionResult_timingInformation,
+
+    -- ** ExecuteStatementRequest
+    executeStatementRequest_parameters,
+    executeStatementRequest_transactionId,
+    executeStatementRequest_statement,
+
+    -- ** ExecuteStatementResult
+    executeStatementResult_consumedIOs,
+    executeStatementResult_firstPage,
+    executeStatementResult_timingInformation,
+
+    -- ** FetchPageRequest
+    fetchPageRequest_transactionId,
+    fetchPageRequest_nextPageToken,
+
+    -- ** FetchPageResult
+    fetchPageResult_consumedIOs,
+    fetchPageResult_page,
+    fetchPageResult_timingInformation,
+
+    -- ** IOUsage
+    iOUsage_readIOs,
+    iOUsage_writeIOs,
+
+    -- ** Page
+    page_nextPageToken,
+    page_values,
+
+    -- ** StartSessionRequest
+    startSessionRequest_ledgerName,
+
+    -- ** StartSessionResult
+    startSessionResult_sessionToken,
+    startSessionResult_timingInformation,
+
+    -- ** StartTransactionRequest
+
+    -- ** StartTransactionResult
+    startTransactionResult_timingInformation,
+    startTransactionResult_transactionId,
+
+    -- ** TimingInformation
+    timingInformation_processingTimeMilliseconds,
+
+    -- ** ValueHolder
+    valueHolder_ionBinary,
+    valueHolder_ionText,
+  )
+where
+
+import Amazonka.QLDBSession.SendCommand
+import Amazonka.QLDBSession.Types.AbortTransactionRequest
+import Amazonka.QLDBSession.Types.AbortTransactionResult
+import Amazonka.QLDBSession.Types.CommitTransactionRequest
+import Amazonka.QLDBSession.Types.CommitTransactionResult
+import Amazonka.QLDBSession.Types.EndSessionRequest
+import Amazonka.QLDBSession.Types.EndSessionResult
+import Amazonka.QLDBSession.Types.ExecuteStatementRequest
+import Amazonka.QLDBSession.Types.ExecuteStatementResult
+import Amazonka.QLDBSession.Types.FetchPageRequest
+import Amazonka.QLDBSession.Types.FetchPageResult
+import Amazonka.QLDBSession.Types.IOUsage
+import Amazonka.QLDBSession.Types.Page
+import Amazonka.QLDBSession.Types.StartSessionRequest
+import Amazonka.QLDBSession.Types.StartSessionResult
+import Amazonka.QLDBSession.Types.StartTransactionRequest
+import Amazonka.QLDBSession.Types.StartTransactionResult
+import Amazonka.QLDBSession.Types.TimingInformation
+import Amazonka.QLDBSession.Types.ValueHolder
diff --git a/gen/Amazonka/QLDBSession/SendCommand.hs b/gen/Amazonka/QLDBSession/SendCommand.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/SendCommand.hs
@@ -0,0 +1,373 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-binds #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.SendCommand
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+--
+-- Sends a command to an Amazon QLDB ledger.
+--
+-- Instead of interacting directly with this API, we recommend using the
+-- QLDB driver or the QLDB shell to execute data transactions on a ledger.
+--
+-- -   If you are working with an AWS SDK, use the QLDB driver. The driver
+--     provides a high-level abstraction layer above this /QLDB Session/
+--     data plane and manages @SendCommand@ API calls for you. For
+--     information and a list of supported programming languages, see
+--     <https://docs.aws.amazon.com/qldb/latest/developerguide/getting-started-driver.html Getting started with the driver>
+--     in the /Amazon QLDB Developer Guide/.
+--
+-- -   If you are working with the AWS Command Line Interface (AWS CLI),
+--     use the QLDB shell. The shell is a command line interface that uses
+--     the QLDB driver to interact with a ledger. For information, see
+--     <https://docs.aws.amazon.com/qldb/latest/developerguide/data-shell.html Accessing Amazon QLDB using the QLDB shell>.
+module Amazonka.QLDBSession.SendCommand
+  ( -- * Creating a Request
+    SendCommand (..),
+    newSendCommand,
+
+    -- * Request Lenses
+    sendCommand_abortTransaction,
+    sendCommand_commitTransaction,
+    sendCommand_endSession,
+    sendCommand_executeStatement,
+    sendCommand_fetchPage,
+    sendCommand_sessionToken,
+    sendCommand_startSession,
+    sendCommand_startTransaction,
+
+    -- * Destructuring the Response
+    SendCommandResponse (..),
+    newSendCommandResponse,
+
+    -- * Response Lenses
+    sendCommandResponse_abortTransaction,
+    sendCommandResponse_commitTransaction,
+    sendCommandResponse_endSession,
+    sendCommandResponse_executeStatement,
+    sendCommandResponse_fetchPage,
+    sendCommandResponse_startSession,
+    sendCommandResponse_startTransaction,
+    sendCommandResponse_httpStatus,
+  )
+where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types
+import qualified Amazonka.Request as Request
+import qualified Amazonka.Response as Response
+
+-- | /See:/ 'newSendCommand' smart constructor.
+data SendCommand = SendCommand'
+  { -- | Command to abort the current transaction.
+    abortTransaction :: Prelude.Maybe AbortTransactionRequest,
+    -- | Command to commit the specified transaction.
+    commitTransaction :: Prelude.Maybe CommitTransactionRequest,
+    -- | Command to end the current session.
+    endSession :: Prelude.Maybe EndSessionRequest,
+    -- | Command to execute a statement in the specified transaction.
+    executeStatement :: Prelude.Maybe ExecuteStatementRequest,
+    -- | Command to fetch a page.
+    fetchPage :: Prelude.Maybe FetchPageRequest,
+    -- | Specifies the session token for the current command. A session token is
+    -- constant throughout the life of the session.
+    --
+    -- To obtain a session token, run the @StartSession@ command. This
+    -- @SessionToken@ is required for every subsequent command that is issued
+    -- during the current session.
+    sessionToken :: Prelude.Maybe Prelude.Text,
+    -- | Command to start a new session. A session token is obtained as part of
+    -- the response.
+    startSession :: Prelude.Maybe StartSessionRequest,
+    -- | Command to start a new transaction.
+    startTransaction :: Prelude.Maybe StartTransactionRequest
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'SendCommand' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'abortTransaction', 'sendCommand_abortTransaction' - Command to abort the current transaction.
+--
+-- 'commitTransaction', 'sendCommand_commitTransaction' - Command to commit the specified transaction.
+--
+-- 'endSession', 'sendCommand_endSession' - Command to end the current session.
+--
+-- 'executeStatement', 'sendCommand_executeStatement' - Command to execute a statement in the specified transaction.
+--
+-- 'fetchPage', 'sendCommand_fetchPage' - Command to fetch a page.
+--
+-- 'sessionToken', 'sendCommand_sessionToken' - Specifies the session token for the current command. A session token is
+-- constant throughout the life of the session.
+--
+-- To obtain a session token, run the @StartSession@ command. This
+-- @SessionToken@ is required for every subsequent command that is issued
+-- during the current session.
+--
+-- 'startSession', 'sendCommand_startSession' - Command to start a new session. A session token is obtained as part of
+-- the response.
+--
+-- 'startTransaction', 'sendCommand_startTransaction' - Command to start a new transaction.
+newSendCommand ::
+  SendCommand
+newSendCommand =
+  SendCommand'
+    { abortTransaction = Prelude.Nothing,
+      commitTransaction = Prelude.Nothing,
+      endSession = Prelude.Nothing,
+      executeStatement = Prelude.Nothing,
+      fetchPage = Prelude.Nothing,
+      sessionToken = Prelude.Nothing,
+      startSession = Prelude.Nothing,
+      startTransaction = Prelude.Nothing
+    }
+
+-- | Command to abort the current transaction.
+sendCommand_abortTransaction :: Lens.Lens' SendCommand (Prelude.Maybe AbortTransactionRequest)
+sendCommand_abortTransaction = Lens.lens (\SendCommand' {abortTransaction} -> abortTransaction) (\s@SendCommand' {} a -> s {abortTransaction = a} :: SendCommand)
+
+-- | Command to commit the specified transaction.
+sendCommand_commitTransaction :: Lens.Lens' SendCommand (Prelude.Maybe CommitTransactionRequest)
+sendCommand_commitTransaction = Lens.lens (\SendCommand' {commitTransaction} -> commitTransaction) (\s@SendCommand' {} a -> s {commitTransaction = a} :: SendCommand)
+
+-- | Command to end the current session.
+sendCommand_endSession :: Lens.Lens' SendCommand (Prelude.Maybe EndSessionRequest)
+sendCommand_endSession = Lens.lens (\SendCommand' {endSession} -> endSession) (\s@SendCommand' {} a -> s {endSession = a} :: SendCommand)
+
+-- | Command to execute a statement in the specified transaction.
+sendCommand_executeStatement :: Lens.Lens' SendCommand (Prelude.Maybe ExecuteStatementRequest)
+sendCommand_executeStatement = Lens.lens (\SendCommand' {executeStatement} -> executeStatement) (\s@SendCommand' {} a -> s {executeStatement = a} :: SendCommand)
+
+-- | Command to fetch a page.
+sendCommand_fetchPage :: Lens.Lens' SendCommand (Prelude.Maybe FetchPageRequest)
+sendCommand_fetchPage = Lens.lens (\SendCommand' {fetchPage} -> fetchPage) (\s@SendCommand' {} a -> s {fetchPage = a} :: SendCommand)
+
+-- | Specifies the session token for the current command. A session token is
+-- constant throughout the life of the session.
+--
+-- To obtain a session token, run the @StartSession@ command. This
+-- @SessionToken@ is required for every subsequent command that is issued
+-- during the current session.
+sendCommand_sessionToken :: Lens.Lens' SendCommand (Prelude.Maybe Prelude.Text)
+sendCommand_sessionToken = Lens.lens (\SendCommand' {sessionToken} -> sessionToken) (\s@SendCommand' {} a -> s {sessionToken = a} :: SendCommand)
+
+-- | Command to start a new session. A session token is obtained as part of
+-- the response.
+sendCommand_startSession :: Lens.Lens' SendCommand (Prelude.Maybe StartSessionRequest)
+sendCommand_startSession = Lens.lens (\SendCommand' {startSession} -> startSession) (\s@SendCommand' {} a -> s {startSession = a} :: SendCommand)
+
+-- | Command to start a new transaction.
+sendCommand_startTransaction :: Lens.Lens' SendCommand (Prelude.Maybe StartTransactionRequest)
+sendCommand_startTransaction = Lens.lens (\SendCommand' {startTransaction} -> startTransaction) (\s@SendCommand' {} a -> s {startTransaction = a} :: SendCommand)
+
+instance Core.AWSRequest SendCommand where
+  type AWSResponse SendCommand = SendCommandResponse
+  request overrides =
+    Request.postJSON (overrides defaultService)
+  response =
+    Response.receiveJSON
+      ( \s h x ->
+          SendCommandResponse'
+            Prelude.<$> (x Data..?> "AbortTransaction")
+            Prelude.<*> (x Data..?> "CommitTransaction")
+            Prelude.<*> (x Data..?> "EndSession")
+            Prelude.<*> (x Data..?> "ExecuteStatement")
+            Prelude.<*> (x Data..?> "FetchPage")
+            Prelude.<*> (x Data..?> "StartSession")
+            Prelude.<*> (x Data..?> "StartTransaction")
+            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
+      )
+
+instance Prelude.Hashable SendCommand where
+  hashWithSalt _salt SendCommand' {..} =
+    _salt
+      `Prelude.hashWithSalt` abortTransaction
+      `Prelude.hashWithSalt` commitTransaction
+      `Prelude.hashWithSalt` endSession
+      `Prelude.hashWithSalt` executeStatement
+      `Prelude.hashWithSalt` fetchPage
+      `Prelude.hashWithSalt` sessionToken
+      `Prelude.hashWithSalt` startSession
+      `Prelude.hashWithSalt` startTransaction
+
+instance Prelude.NFData SendCommand where
+  rnf SendCommand' {..} =
+    Prelude.rnf abortTransaction
+      `Prelude.seq` Prelude.rnf commitTransaction
+      `Prelude.seq` Prelude.rnf endSession
+      `Prelude.seq` Prelude.rnf executeStatement
+      `Prelude.seq` Prelude.rnf fetchPage
+      `Prelude.seq` Prelude.rnf sessionToken
+      `Prelude.seq` Prelude.rnf startSession
+      `Prelude.seq` Prelude.rnf startTransaction
+
+instance Data.ToHeaders SendCommand where
+  toHeaders =
+    Prelude.const
+      ( Prelude.mconcat
+          [ "X-Amz-Target"
+              Data.=# ("QLDBSession.SendCommand" :: Prelude.ByteString),
+            "Content-Type"
+              Data.=# ( "application/x-amz-json-1.0" ::
+                          Prelude.ByteString
+                      )
+          ]
+      )
+
+instance Data.ToJSON SendCommand where
+  toJSON SendCommand' {..} =
+    Data.object
+      ( Prelude.catMaybes
+          [ ("AbortTransaction" Data..=)
+              Prelude.<$> abortTransaction,
+            ("CommitTransaction" Data..=)
+              Prelude.<$> commitTransaction,
+            ("EndSession" Data..=) Prelude.<$> endSession,
+            ("ExecuteStatement" Data..=)
+              Prelude.<$> executeStatement,
+            ("FetchPage" Data..=) Prelude.<$> fetchPage,
+            ("SessionToken" Data..=) Prelude.<$> sessionToken,
+            ("StartSession" Data..=) Prelude.<$> startSession,
+            ("StartTransaction" Data..=)
+              Prelude.<$> startTransaction
+          ]
+      )
+
+instance Data.ToPath SendCommand where
+  toPath = Prelude.const "/"
+
+instance Data.ToQuery SendCommand where
+  toQuery = Prelude.const Prelude.mempty
+
+-- | /See:/ 'newSendCommandResponse' smart constructor.
+data SendCommandResponse = SendCommandResponse'
+  { -- | Contains the details of the aborted transaction.
+    abortTransaction :: Prelude.Maybe AbortTransactionResult,
+    -- | Contains the details of the committed transaction.
+    commitTransaction :: Prelude.Maybe CommitTransactionResult,
+    -- | Contains the details of the ended session.
+    endSession :: Prelude.Maybe EndSessionResult,
+    -- | Contains the details of the executed statement.
+    executeStatement :: Prelude.Maybe ExecuteStatementResult,
+    -- | Contains the details of the fetched page.
+    fetchPage :: Prelude.Maybe FetchPageResult,
+    -- | Contains the details of the started session that includes a session
+    -- token. This @SessionToken@ is required for every subsequent command that
+    -- is issued during the current session.
+    startSession :: Prelude.Maybe StartSessionResult,
+    -- | Contains the details of the started transaction.
+    startTransaction :: Prelude.Maybe StartTransactionResult,
+    -- | The response's http status code.
+    httpStatus :: Prelude.Int
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'SendCommandResponse' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'abortTransaction', 'sendCommandResponse_abortTransaction' - Contains the details of the aborted transaction.
+--
+-- 'commitTransaction', 'sendCommandResponse_commitTransaction' - Contains the details of the committed transaction.
+--
+-- 'endSession', 'sendCommandResponse_endSession' - Contains the details of the ended session.
+--
+-- 'executeStatement', 'sendCommandResponse_executeStatement' - Contains the details of the executed statement.
+--
+-- 'fetchPage', 'sendCommandResponse_fetchPage' - Contains the details of the fetched page.
+--
+-- 'startSession', 'sendCommandResponse_startSession' - Contains the details of the started session that includes a session
+-- token. This @SessionToken@ is required for every subsequent command that
+-- is issued during the current session.
+--
+-- 'startTransaction', 'sendCommandResponse_startTransaction' - Contains the details of the started transaction.
+--
+-- 'httpStatus', 'sendCommandResponse_httpStatus' - The response's http status code.
+newSendCommandResponse ::
+  -- | 'httpStatus'
+  Prelude.Int ->
+  SendCommandResponse
+newSendCommandResponse pHttpStatus_ =
+  SendCommandResponse'
+    { abortTransaction =
+        Prelude.Nothing,
+      commitTransaction = Prelude.Nothing,
+      endSession = Prelude.Nothing,
+      executeStatement = Prelude.Nothing,
+      fetchPage = Prelude.Nothing,
+      startSession = Prelude.Nothing,
+      startTransaction = Prelude.Nothing,
+      httpStatus = pHttpStatus_
+    }
+
+-- | Contains the details of the aborted transaction.
+sendCommandResponse_abortTransaction :: Lens.Lens' SendCommandResponse (Prelude.Maybe AbortTransactionResult)
+sendCommandResponse_abortTransaction = Lens.lens (\SendCommandResponse' {abortTransaction} -> abortTransaction) (\s@SendCommandResponse' {} a -> s {abortTransaction = a} :: SendCommandResponse)
+
+-- | Contains the details of the committed transaction.
+sendCommandResponse_commitTransaction :: Lens.Lens' SendCommandResponse (Prelude.Maybe CommitTransactionResult)
+sendCommandResponse_commitTransaction = Lens.lens (\SendCommandResponse' {commitTransaction} -> commitTransaction) (\s@SendCommandResponse' {} a -> s {commitTransaction = a} :: SendCommandResponse)
+
+-- | Contains the details of the ended session.
+sendCommandResponse_endSession :: Lens.Lens' SendCommandResponse (Prelude.Maybe EndSessionResult)
+sendCommandResponse_endSession = Lens.lens (\SendCommandResponse' {endSession} -> endSession) (\s@SendCommandResponse' {} a -> s {endSession = a} :: SendCommandResponse)
+
+-- | Contains the details of the executed statement.
+sendCommandResponse_executeStatement :: Lens.Lens' SendCommandResponse (Prelude.Maybe ExecuteStatementResult)
+sendCommandResponse_executeStatement = Lens.lens (\SendCommandResponse' {executeStatement} -> executeStatement) (\s@SendCommandResponse' {} a -> s {executeStatement = a} :: SendCommandResponse)
+
+-- | Contains the details of the fetched page.
+sendCommandResponse_fetchPage :: Lens.Lens' SendCommandResponse (Prelude.Maybe FetchPageResult)
+sendCommandResponse_fetchPage = Lens.lens (\SendCommandResponse' {fetchPage} -> fetchPage) (\s@SendCommandResponse' {} a -> s {fetchPage = a} :: SendCommandResponse)
+
+-- | Contains the details of the started session that includes a session
+-- token. This @SessionToken@ is required for every subsequent command that
+-- is issued during the current session.
+sendCommandResponse_startSession :: Lens.Lens' SendCommandResponse (Prelude.Maybe StartSessionResult)
+sendCommandResponse_startSession = Lens.lens (\SendCommandResponse' {startSession} -> startSession) (\s@SendCommandResponse' {} a -> s {startSession = a} :: SendCommandResponse)
+
+-- | Contains the details of the started transaction.
+sendCommandResponse_startTransaction :: Lens.Lens' SendCommandResponse (Prelude.Maybe StartTransactionResult)
+sendCommandResponse_startTransaction = Lens.lens (\SendCommandResponse' {startTransaction} -> startTransaction) (\s@SendCommandResponse' {} a -> s {startTransaction = a} :: SendCommandResponse)
+
+-- | The response's http status code.
+sendCommandResponse_httpStatus :: Lens.Lens' SendCommandResponse Prelude.Int
+sendCommandResponse_httpStatus = Lens.lens (\SendCommandResponse' {httpStatus} -> httpStatus) (\s@SendCommandResponse' {} a -> s {httpStatus = a} :: SendCommandResponse)
+
+instance Prelude.NFData SendCommandResponse where
+  rnf SendCommandResponse' {..} =
+    Prelude.rnf abortTransaction
+      `Prelude.seq` Prelude.rnf commitTransaction
+      `Prelude.seq` Prelude.rnf endSession
+      `Prelude.seq` Prelude.rnf executeStatement
+      `Prelude.seq` Prelude.rnf fetchPage
+      `Prelude.seq` Prelude.rnf startSession
+      `Prelude.seq` Prelude.rnf startTransaction
+      `Prelude.seq` Prelude.rnf httpStatus
diff --git a/gen/Amazonka/QLDBSession/Types.hs b/gen/Amazonka/QLDBSession/Types.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types.hs
@@ -0,0 +1,271 @@
+{-# LANGUAGE DisambiguateRecordFields #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types
+  ( -- * Service Configuration
+    defaultService,
+
+    -- * Errors
+    _BadRequestException,
+    _CapacityExceededException,
+    _InvalidSessionException,
+    _LimitExceededException,
+    _OccConflictException,
+    _RateExceededException,
+
+    -- * AbortTransactionRequest
+    AbortTransactionRequest (..),
+    newAbortTransactionRequest,
+
+    -- * AbortTransactionResult
+    AbortTransactionResult (..),
+    newAbortTransactionResult,
+    abortTransactionResult_timingInformation,
+
+    -- * CommitTransactionRequest
+    CommitTransactionRequest (..),
+    newCommitTransactionRequest,
+    commitTransactionRequest_transactionId,
+    commitTransactionRequest_commitDigest,
+
+    -- * CommitTransactionResult
+    CommitTransactionResult (..),
+    newCommitTransactionResult,
+    commitTransactionResult_commitDigest,
+    commitTransactionResult_consumedIOs,
+    commitTransactionResult_timingInformation,
+    commitTransactionResult_transactionId,
+
+    -- * EndSessionRequest
+    EndSessionRequest (..),
+    newEndSessionRequest,
+
+    -- * EndSessionResult
+    EndSessionResult (..),
+    newEndSessionResult,
+    endSessionResult_timingInformation,
+
+    -- * ExecuteStatementRequest
+    ExecuteStatementRequest (..),
+    newExecuteStatementRequest,
+    executeStatementRequest_parameters,
+    executeStatementRequest_transactionId,
+    executeStatementRequest_statement,
+
+    -- * ExecuteStatementResult
+    ExecuteStatementResult (..),
+    newExecuteStatementResult,
+    executeStatementResult_consumedIOs,
+    executeStatementResult_firstPage,
+    executeStatementResult_timingInformation,
+
+    -- * FetchPageRequest
+    FetchPageRequest (..),
+    newFetchPageRequest,
+    fetchPageRequest_transactionId,
+    fetchPageRequest_nextPageToken,
+
+    -- * FetchPageResult
+    FetchPageResult (..),
+    newFetchPageResult,
+    fetchPageResult_consumedIOs,
+    fetchPageResult_page,
+    fetchPageResult_timingInformation,
+
+    -- * IOUsage
+    IOUsage (..),
+    newIOUsage,
+    iOUsage_readIOs,
+    iOUsage_writeIOs,
+
+    -- * Page
+    Page (..),
+    newPage,
+    page_nextPageToken,
+    page_values,
+
+    -- * StartSessionRequest
+    StartSessionRequest (..),
+    newStartSessionRequest,
+    startSessionRequest_ledgerName,
+
+    -- * StartSessionResult
+    StartSessionResult (..),
+    newStartSessionResult,
+    startSessionResult_sessionToken,
+    startSessionResult_timingInformation,
+
+    -- * StartTransactionRequest
+    StartTransactionRequest (..),
+    newStartTransactionRequest,
+
+    -- * StartTransactionResult
+    StartTransactionResult (..),
+    newStartTransactionResult,
+    startTransactionResult_timingInformation,
+    startTransactionResult_transactionId,
+
+    -- * TimingInformation
+    TimingInformation (..),
+    newTimingInformation,
+    timingInformation_processingTimeMilliseconds,
+
+    -- * ValueHolder
+    ValueHolder (..),
+    newValueHolder,
+    valueHolder_ionBinary,
+    valueHolder_ionText,
+  )
+where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.AbortTransactionRequest
+import Amazonka.QLDBSession.Types.AbortTransactionResult
+import Amazonka.QLDBSession.Types.CommitTransactionRequest
+import Amazonka.QLDBSession.Types.CommitTransactionResult
+import Amazonka.QLDBSession.Types.EndSessionRequest
+import Amazonka.QLDBSession.Types.EndSessionResult
+import Amazonka.QLDBSession.Types.ExecuteStatementRequest
+import Amazonka.QLDBSession.Types.ExecuteStatementResult
+import Amazonka.QLDBSession.Types.FetchPageRequest
+import Amazonka.QLDBSession.Types.FetchPageResult
+import Amazonka.QLDBSession.Types.IOUsage
+import Amazonka.QLDBSession.Types.Page
+import Amazonka.QLDBSession.Types.StartSessionRequest
+import Amazonka.QLDBSession.Types.StartSessionResult
+import Amazonka.QLDBSession.Types.StartTransactionRequest
+import Amazonka.QLDBSession.Types.StartTransactionResult
+import Amazonka.QLDBSession.Types.TimingInformation
+import Amazonka.QLDBSession.Types.ValueHolder
+import qualified Amazonka.Sign.V4 as Sign
+
+-- | API version @2019-07-11@ of the Amazon QLDB Session SDK configuration.
+defaultService :: Core.Service
+defaultService =
+  Core.Service
+    { Core.abbrev = "QLDBSession",
+      Core.signer = Sign.v4,
+      Core.endpointPrefix = "session.qldb",
+      Core.signingName = "qldb",
+      Core.version = "2019-07-11",
+      Core.s3AddressingStyle = Core.S3AddressingStyleAuto,
+      Core.endpoint = Core.defaultEndpoint defaultService,
+      Core.timeout = Prelude.Just 70,
+      Core.check = Core.statusSuccess,
+      Core.error = Core.parseJSONError "QLDBSession",
+      Core.retry = retry
+    }
+  where
+    retry =
+      Core.Exponential
+        { Core.base = 5.0e-2,
+          Core.growth = 2,
+          Core.attempts = 5,
+          Core.check = check
+        }
+    check e
+      | Lens.has (Core.hasStatus 502) e =
+          Prelude.Just "bad_gateway"
+      | Lens.has (Core.hasStatus 504) e =
+          Prelude.Just "gateway_timeout"
+      | Lens.has (Core.hasStatus 500) e =
+          Prelude.Just "general_server_error"
+      | Lens.has (Core.hasStatus 509) e =
+          Prelude.Just "limit_exceeded"
+      | Lens.has
+          ( Core.hasCode "RequestThrottledException"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "request_throttled_exception"
+      | Lens.has (Core.hasStatus 503) e =
+          Prelude.Just "service_unavailable"
+      | Lens.has
+          ( Core.hasCode "ThrottledException"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "throttled_exception"
+      | Lens.has
+          ( Core.hasCode "Throttling"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "throttling"
+      | Lens.has
+          ( Core.hasCode "ThrottlingException"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "throttling_exception"
+      | Lens.has
+          ( Core.hasCode
+              "ProvisionedThroughputExceededException"
+              Prelude.. Core.hasStatus 400
+          )
+          e =
+          Prelude.Just "throughput_exceeded"
+      | Lens.has (Core.hasStatus 429) e =
+          Prelude.Just "too_many_requests"
+      | Prelude.otherwise = Prelude.Nothing
+
+-- | Returned if the request is malformed or contains an error such as an
+-- invalid parameter value or a missing required parameter.
+_BadRequestException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_BadRequestException =
+  Core._MatchServiceError
+    defaultService
+    "BadRequestException"
+
+-- | Returned when the request exceeds the processing capacity of the ledger.
+_CapacityExceededException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_CapacityExceededException =
+  Core._MatchServiceError
+    defaultService
+    "CapacityExceededException"
+
+-- | Returned if the session doesn\'t exist anymore because it timed out or
+-- expired.
+_InvalidSessionException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_InvalidSessionException =
+  Core._MatchServiceError
+    defaultService
+    "InvalidSessionException"
+
+-- | Returned if a resource limit such as number of active sessions is
+-- exceeded.
+_LimitExceededException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_LimitExceededException =
+  Core._MatchServiceError
+    defaultService
+    "LimitExceededException"
+
+-- | Returned when a transaction cannot be written to the journal due to a
+-- failure in the verification phase of /optimistic concurrency control/
+-- (OCC).
+_OccConflictException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_OccConflictException =
+  Core._MatchServiceError
+    defaultService
+    "OccConflictException"
+
+-- | Returned when the rate of requests exceeds the allowed throughput.
+_RateExceededException :: (Core.AsError a) => Lens.Fold a Core.ServiceError
+_RateExceededException =
+  Core._MatchServiceError
+    defaultService
+    "RateExceededException"
diff --git a/gen/Amazonka/QLDBSession/Types/AbortTransactionRequest.hs b/gen/Amazonka/QLDBSession/Types/AbortTransactionRequest.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/AbortTransactionRequest.hs
@@ -0,0 +1,51 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.AbortTransactionRequest
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.AbortTransactionRequest where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | Contains the details of the transaction to abort.
+--
+-- /See:/ 'newAbortTransactionRequest' smart constructor.
+data AbortTransactionRequest = AbortTransactionRequest'
+  {
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'AbortTransactionRequest' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+newAbortTransactionRequest ::
+  AbortTransactionRequest
+newAbortTransactionRequest = AbortTransactionRequest'
+
+instance Prelude.Hashable AbortTransactionRequest where
+  hashWithSalt _salt _ =
+    _salt `Prelude.hashWithSalt` ()
+
+instance Prelude.NFData AbortTransactionRequest where
+  rnf _ = ()
+
+instance Data.ToJSON AbortTransactionRequest where
+  toJSON = Prelude.const (Data.Object Prelude.mempty)
diff --git a/gen/Amazonka/QLDBSession/Types/AbortTransactionResult.hs b/gen/Amazonka/QLDBSession/Types/AbortTransactionResult.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/AbortTransactionResult.hs
@@ -0,0 +1,73 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.AbortTransactionResult
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.AbortTransactionResult where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.TimingInformation
+
+-- | Contains the details of the aborted transaction.
+--
+-- /See:/ 'newAbortTransactionResult' smart constructor.
+data AbortTransactionResult = AbortTransactionResult'
+  { -- | Contains server-side performance information for the command.
+    timingInformation :: Prelude.Maybe TimingInformation
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'AbortTransactionResult' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'timingInformation', 'abortTransactionResult_timingInformation' - Contains server-side performance information for the command.
+newAbortTransactionResult ::
+  AbortTransactionResult
+newAbortTransactionResult =
+  AbortTransactionResult'
+    { timingInformation =
+        Prelude.Nothing
+    }
+
+-- | Contains server-side performance information for the command.
+abortTransactionResult_timingInformation :: Lens.Lens' AbortTransactionResult (Prelude.Maybe TimingInformation)
+abortTransactionResult_timingInformation = Lens.lens (\AbortTransactionResult' {timingInformation} -> timingInformation) (\s@AbortTransactionResult' {} a -> s {timingInformation = a} :: AbortTransactionResult)
+
+instance Data.FromJSON AbortTransactionResult where
+  parseJSON =
+    Data.withObject
+      "AbortTransactionResult"
+      ( \x ->
+          AbortTransactionResult'
+            Prelude.<$> (x Data..:? "TimingInformation")
+      )
+
+instance Prelude.Hashable AbortTransactionResult where
+  hashWithSalt _salt AbortTransactionResult' {..} =
+    _salt `Prelude.hashWithSalt` timingInformation
+
+instance Prelude.NFData AbortTransactionResult where
+  rnf AbortTransactionResult' {..} =
+    Prelude.rnf timingInformation
diff --git a/gen/Amazonka/QLDBSession/Types/CommitTransactionRequest.hs b/gen/Amazonka/QLDBSession/Types/CommitTransactionRequest.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/CommitTransactionRequest.hs
@@ -0,0 +1,123 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.CommitTransactionRequest
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.CommitTransactionRequest where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | Contains the details of the transaction to commit.
+--
+-- /See:/ 'newCommitTransactionRequest' smart constructor.
+data CommitTransactionRequest = CommitTransactionRequest'
+  { -- | Specifies the transaction ID of the transaction to commit.
+    transactionId :: Prelude.Text,
+    -- | Specifies the commit digest for the transaction to commit. For every
+    -- active transaction, the commit digest must be passed. QLDB validates
+    -- @CommitDigest@ and rejects the commit with an error if the digest
+    -- computed on the client does not match the digest computed by QLDB.
+    --
+    -- The purpose of the @CommitDigest@ parameter is to ensure that QLDB
+    -- commits a transaction if and only if the server has processed the exact
+    -- set of statements sent by the client, in the same order that client sent
+    -- them, and with no duplicates.
+    commitDigest :: Data.Base64
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'CommitTransactionRequest' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'transactionId', 'commitTransactionRequest_transactionId' - Specifies the transaction ID of the transaction to commit.
+--
+-- 'commitDigest', 'commitTransactionRequest_commitDigest' - Specifies the commit digest for the transaction to commit. For every
+-- active transaction, the commit digest must be passed. QLDB validates
+-- @CommitDigest@ and rejects the commit with an error if the digest
+-- computed on the client does not match the digest computed by QLDB.
+--
+-- The purpose of the @CommitDigest@ parameter is to ensure that QLDB
+-- commits a transaction if and only if the server has processed the exact
+-- set of statements sent by the client, in the same order that client sent
+-- them, and with no duplicates.--
+-- -- /Note:/ This 'Lens' automatically encodes and decodes Base64 data.
+-- -- The underlying isomorphism will encode to Base64 representation during
+-- -- serialisation, and decode from Base64 representation during deserialisation.
+-- -- This 'Lens' accepts and returns only raw unencoded data.
+newCommitTransactionRequest ::
+  -- | 'transactionId'
+  Prelude.Text ->
+  -- | 'commitDigest'
+  Prelude.ByteString ->
+  CommitTransactionRequest
+newCommitTransactionRequest
+  pTransactionId_
+  pCommitDigest_ =
+    CommitTransactionRequest'
+      { transactionId =
+          pTransactionId_,
+        commitDigest = Data._Base64 Lens.# pCommitDigest_
+      }
+
+-- | Specifies the transaction ID of the transaction to commit.
+commitTransactionRequest_transactionId :: Lens.Lens' CommitTransactionRequest Prelude.Text
+commitTransactionRequest_transactionId = Lens.lens (\CommitTransactionRequest' {transactionId} -> transactionId) (\s@CommitTransactionRequest' {} a -> s {transactionId = a} :: CommitTransactionRequest)
+
+-- | Specifies the commit digest for the transaction to commit. For every
+-- active transaction, the commit digest must be passed. QLDB validates
+-- @CommitDigest@ and rejects the commit with an error if the digest
+-- computed on the client does not match the digest computed by QLDB.
+--
+-- The purpose of the @CommitDigest@ parameter is to ensure that QLDB
+-- commits a transaction if and only if the server has processed the exact
+-- set of statements sent by the client, in the same order that client sent
+-- them, and with no duplicates.--
+-- -- /Note:/ This 'Lens' automatically encodes and decodes Base64 data.
+-- -- The underlying isomorphism will encode to Base64 representation during
+-- -- serialisation, and decode from Base64 representation during deserialisation.
+-- -- This 'Lens' accepts and returns only raw unencoded data.
+commitTransactionRequest_commitDigest :: Lens.Lens' CommitTransactionRequest Prelude.ByteString
+commitTransactionRequest_commitDigest = Lens.lens (\CommitTransactionRequest' {commitDigest} -> commitDigest) (\s@CommitTransactionRequest' {} a -> s {commitDigest = a} :: CommitTransactionRequest) Prelude.. Data._Base64
+
+instance Prelude.Hashable CommitTransactionRequest where
+  hashWithSalt _salt CommitTransactionRequest' {..} =
+    _salt
+      `Prelude.hashWithSalt` transactionId
+      `Prelude.hashWithSalt` commitDigest
+
+instance Prelude.NFData CommitTransactionRequest where
+  rnf CommitTransactionRequest' {..} =
+    Prelude.rnf transactionId
+      `Prelude.seq` Prelude.rnf commitDigest
+
+instance Data.ToJSON CommitTransactionRequest where
+  toJSON CommitTransactionRequest' {..} =
+    Data.object
+      ( Prelude.catMaybes
+          [ Prelude.Just
+              ("TransactionId" Data..= transactionId),
+            Prelude.Just ("CommitDigest" Data..= commitDigest)
+          ]
+      )
diff --git a/gen/Amazonka/QLDBSession/Types/CommitTransactionResult.hs b/gen/Amazonka/QLDBSession/Types/CommitTransactionResult.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/CommitTransactionResult.hs
@@ -0,0 +1,119 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.CommitTransactionResult
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.CommitTransactionResult where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.IOUsage
+import Amazonka.QLDBSession.Types.TimingInformation
+
+-- | Contains the details of the committed transaction.
+--
+-- /See:/ 'newCommitTransactionResult' smart constructor.
+data CommitTransactionResult = CommitTransactionResult'
+  { -- | The commit digest of the committed transaction.
+    commitDigest :: Prelude.Maybe Data.Base64,
+    -- | Contains metrics about the number of I\/O requests that were consumed.
+    consumedIOs :: Prelude.Maybe IOUsage,
+    -- | Contains server-side performance information for the command.
+    timingInformation :: Prelude.Maybe TimingInformation,
+    -- | The transaction ID of the committed transaction.
+    transactionId :: Prelude.Maybe Prelude.Text
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'CommitTransactionResult' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'commitDigest', 'commitTransactionResult_commitDigest' - The commit digest of the committed transaction.--
+-- -- /Note:/ This 'Lens' automatically encodes and decodes Base64 data.
+-- -- The underlying isomorphism will encode to Base64 representation during
+-- -- serialisation, and decode from Base64 representation during deserialisation.
+-- -- This 'Lens' accepts and returns only raw unencoded data.
+--
+-- 'consumedIOs', 'commitTransactionResult_consumedIOs' - Contains metrics about the number of I\/O requests that were consumed.
+--
+-- 'timingInformation', 'commitTransactionResult_timingInformation' - Contains server-side performance information for the command.
+--
+-- 'transactionId', 'commitTransactionResult_transactionId' - The transaction ID of the committed transaction.
+newCommitTransactionResult ::
+  CommitTransactionResult
+newCommitTransactionResult =
+  CommitTransactionResult'
+    { commitDigest =
+        Prelude.Nothing,
+      consumedIOs = Prelude.Nothing,
+      timingInformation = Prelude.Nothing,
+      transactionId = Prelude.Nothing
+    }
+
+-- | The commit digest of the committed transaction.--
+-- -- /Note:/ This 'Lens' automatically encodes and decodes Base64 data.
+-- -- The underlying isomorphism will encode to Base64 representation during
+-- -- serialisation, and decode from Base64 representation during deserialisation.
+-- -- This 'Lens' accepts and returns only raw unencoded data.
+commitTransactionResult_commitDigest :: Lens.Lens' CommitTransactionResult (Prelude.Maybe Prelude.ByteString)
+commitTransactionResult_commitDigest = Lens.lens (\CommitTransactionResult' {commitDigest} -> commitDigest) (\s@CommitTransactionResult' {} a -> s {commitDigest = a} :: CommitTransactionResult) Prelude.. Lens.mapping Data._Base64
+
+-- | Contains metrics about the number of I\/O requests that were consumed.
+commitTransactionResult_consumedIOs :: Lens.Lens' CommitTransactionResult (Prelude.Maybe IOUsage)
+commitTransactionResult_consumedIOs = Lens.lens (\CommitTransactionResult' {consumedIOs} -> consumedIOs) (\s@CommitTransactionResult' {} a -> s {consumedIOs = a} :: CommitTransactionResult)
+
+-- | Contains server-side performance information for the command.
+commitTransactionResult_timingInformation :: Lens.Lens' CommitTransactionResult (Prelude.Maybe TimingInformation)
+commitTransactionResult_timingInformation = Lens.lens (\CommitTransactionResult' {timingInformation} -> timingInformation) (\s@CommitTransactionResult' {} a -> s {timingInformation = a} :: CommitTransactionResult)
+
+-- | The transaction ID of the committed transaction.
+commitTransactionResult_transactionId :: Lens.Lens' CommitTransactionResult (Prelude.Maybe Prelude.Text)
+commitTransactionResult_transactionId = Lens.lens (\CommitTransactionResult' {transactionId} -> transactionId) (\s@CommitTransactionResult' {} a -> s {transactionId = a} :: CommitTransactionResult)
+
+instance Data.FromJSON CommitTransactionResult where
+  parseJSON =
+    Data.withObject
+      "CommitTransactionResult"
+      ( \x ->
+          CommitTransactionResult'
+            Prelude.<$> (x Data..:? "CommitDigest")
+            Prelude.<*> (x Data..:? "ConsumedIOs")
+            Prelude.<*> (x Data..:? "TimingInformation")
+            Prelude.<*> (x Data..:? "TransactionId")
+      )
+
+instance Prelude.Hashable CommitTransactionResult where
+  hashWithSalt _salt CommitTransactionResult' {..} =
+    _salt
+      `Prelude.hashWithSalt` commitDigest
+      `Prelude.hashWithSalt` consumedIOs
+      `Prelude.hashWithSalt` timingInformation
+      `Prelude.hashWithSalt` transactionId
+
+instance Prelude.NFData CommitTransactionResult where
+  rnf CommitTransactionResult' {..} =
+    Prelude.rnf commitDigest
+      `Prelude.seq` Prelude.rnf consumedIOs
+      `Prelude.seq` Prelude.rnf timingInformation
+      `Prelude.seq` Prelude.rnf transactionId
diff --git a/gen/Amazonka/QLDBSession/Types/EndSessionRequest.hs b/gen/Amazonka/QLDBSession/Types/EndSessionRequest.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/EndSessionRequest.hs
@@ -0,0 +1,51 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.EndSessionRequest
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.EndSessionRequest where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | Specifies a request to end the session.
+--
+-- /See:/ 'newEndSessionRequest' smart constructor.
+data EndSessionRequest = EndSessionRequest'
+  {
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'EndSessionRequest' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+newEndSessionRequest ::
+  EndSessionRequest
+newEndSessionRequest = EndSessionRequest'
+
+instance Prelude.Hashable EndSessionRequest where
+  hashWithSalt _salt _ =
+    _salt `Prelude.hashWithSalt` ()
+
+instance Prelude.NFData EndSessionRequest where
+  rnf _ = ()
+
+instance Data.ToJSON EndSessionRequest where
+  toJSON = Prelude.const (Data.Object Prelude.mempty)
diff --git a/gen/Amazonka/QLDBSession/Types/EndSessionResult.hs b/gen/Amazonka/QLDBSession/Types/EndSessionResult.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/EndSessionResult.hs
@@ -0,0 +1,73 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.EndSessionResult
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.EndSessionResult where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.TimingInformation
+
+-- | Contains the details of the ended session.
+--
+-- /See:/ 'newEndSessionResult' smart constructor.
+data EndSessionResult = EndSessionResult'
+  { -- | Contains server-side performance information for the command.
+    timingInformation :: Prelude.Maybe TimingInformation
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'EndSessionResult' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'timingInformation', 'endSessionResult_timingInformation' - Contains server-side performance information for the command.
+newEndSessionResult ::
+  EndSessionResult
+newEndSessionResult =
+  EndSessionResult'
+    { timingInformation =
+        Prelude.Nothing
+    }
+
+-- | Contains server-side performance information for the command.
+endSessionResult_timingInformation :: Lens.Lens' EndSessionResult (Prelude.Maybe TimingInformation)
+endSessionResult_timingInformation = Lens.lens (\EndSessionResult' {timingInformation} -> timingInformation) (\s@EndSessionResult' {} a -> s {timingInformation = a} :: EndSessionResult)
+
+instance Data.FromJSON EndSessionResult where
+  parseJSON =
+    Data.withObject
+      "EndSessionResult"
+      ( \x ->
+          EndSessionResult'
+            Prelude.<$> (x Data..:? "TimingInformation")
+      )
+
+instance Prelude.Hashable EndSessionResult where
+  hashWithSalt _salt EndSessionResult' {..} =
+    _salt `Prelude.hashWithSalt` timingInformation
+
+instance Prelude.NFData EndSessionResult where
+  rnf EndSessionResult' {..} =
+    Prelude.rnf timingInformation
diff --git a/gen/Amazonka/QLDBSession/Types/ExecuteStatementRequest.hs b/gen/Amazonka/QLDBSession/Types/ExecuteStatementRequest.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/ExecuteStatementRequest.hs
@@ -0,0 +1,103 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.ExecuteStatementRequest
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.ExecuteStatementRequest where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.ValueHolder
+
+-- | Specifies a request to execute a statement.
+--
+-- /See:/ 'newExecuteStatementRequest' smart constructor.
+data ExecuteStatementRequest = ExecuteStatementRequest'
+  { -- | Specifies the parameters for the parameterized statement in the request.
+    parameters :: Prelude.Maybe [ValueHolder],
+    -- | Specifies the transaction ID of the request.
+    transactionId :: Prelude.Text,
+    -- | Specifies the statement of the request.
+    statement :: Prelude.Text
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'ExecuteStatementRequest' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'parameters', 'executeStatementRequest_parameters' - Specifies the parameters for the parameterized statement in the request.
+--
+-- 'transactionId', 'executeStatementRequest_transactionId' - Specifies the transaction ID of the request.
+--
+-- 'statement', 'executeStatementRequest_statement' - Specifies the statement of the request.
+newExecuteStatementRequest ::
+  -- | 'transactionId'
+  Prelude.Text ->
+  -- | 'statement'
+  Prelude.Text ->
+  ExecuteStatementRequest
+newExecuteStatementRequest
+  pTransactionId_
+  pStatement_ =
+    ExecuteStatementRequest'
+      { parameters =
+          Prelude.Nothing,
+        transactionId = pTransactionId_,
+        statement = pStatement_
+      }
+
+-- | Specifies the parameters for the parameterized statement in the request.
+executeStatementRequest_parameters :: Lens.Lens' ExecuteStatementRequest (Prelude.Maybe [ValueHolder])
+executeStatementRequest_parameters = Lens.lens (\ExecuteStatementRequest' {parameters} -> parameters) (\s@ExecuteStatementRequest' {} a -> s {parameters = a} :: ExecuteStatementRequest) Prelude.. Lens.mapping Lens.coerced
+
+-- | Specifies the transaction ID of the request.
+executeStatementRequest_transactionId :: Lens.Lens' ExecuteStatementRequest Prelude.Text
+executeStatementRequest_transactionId = Lens.lens (\ExecuteStatementRequest' {transactionId} -> transactionId) (\s@ExecuteStatementRequest' {} a -> s {transactionId = a} :: ExecuteStatementRequest)
+
+-- | Specifies the statement of the request.
+executeStatementRequest_statement :: Lens.Lens' ExecuteStatementRequest Prelude.Text
+executeStatementRequest_statement = Lens.lens (\ExecuteStatementRequest' {statement} -> statement) (\s@ExecuteStatementRequest' {} a -> s {statement = a} :: ExecuteStatementRequest)
+
+instance Prelude.Hashable ExecuteStatementRequest where
+  hashWithSalt _salt ExecuteStatementRequest' {..} =
+    _salt
+      `Prelude.hashWithSalt` parameters
+      `Prelude.hashWithSalt` transactionId
+      `Prelude.hashWithSalt` statement
+
+instance Prelude.NFData ExecuteStatementRequest where
+  rnf ExecuteStatementRequest' {..} =
+    Prelude.rnf parameters
+      `Prelude.seq` Prelude.rnf transactionId
+      `Prelude.seq` Prelude.rnf statement
+
+instance Data.ToJSON ExecuteStatementRequest where
+  toJSON ExecuteStatementRequest' {..} =
+    Data.object
+      ( Prelude.catMaybes
+          [ ("Parameters" Data..=) Prelude.<$> parameters,
+            Prelude.Just ("TransactionId" Data..= transactionId),
+            Prelude.Just ("Statement" Data..= statement)
+          ]
+      )
diff --git a/gen/Amazonka/QLDBSession/Types/ExecuteStatementResult.hs b/gen/Amazonka/QLDBSession/Types/ExecuteStatementResult.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/ExecuteStatementResult.hs
@@ -0,0 +1,100 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.ExecuteStatementResult
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.ExecuteStatementResult where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.IOUsage
+import Amazonka.QLDBSession.Types.Page
+import Amazonka.QLDBSession.Types.TimingInformation
+
+-- | Contains the details of the executed statement.
+--
+-- /See:/ 'newExecuteStatementResult' smart constructor.
+data ExecuteStatementResult = ExecuteStatementResult'
+  { -- | Contains metrics about the number of I\/O requests that were consumed.
+    consumedIOs :: Prelude.Maybe IOUsage,
+    -- | Contains the details of the first fetched page.
+    firstPage :: Prelude.Maybe Page,
+    -- | Contains server-side performance information for the command.
+    timingInformation :: Prelude.Maybe TimingInformation
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'ExecuteStatementResult' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'consumedIOs', 'executeStatementResult_consumedIOs' - Contains metrics about the number of I\/O requests that were consumed.
+--
+-- 'firstPage', 'executeStatementResult_firstPage' - Contains the details of the first fetched page.
+--
+-- 'timingInformation', 'executeStatementResult_timingInformation' - Contains server-side performance information for the command.
+newExecuteStatementResult ::
+  ExecuteStatementResult
+newExecuteStatementResult =
+  ExecuteStatementResult'
+    { consumedIOs =
+        Prelude.Nothing,
+      firstPage = Prelude.Nothing,
+      timingInformation = Prelude.Nothing
+    }
+
+-- | Contains metrics about the number of I\/O requests that were consumed.
+executeStatementResult_consumedIOs :: Lens.Lens' ExecuteStatementResult (Prelude.Maybe IOUsage)
+executeStatementResult_consumedIOs = Lens.lens (\ExecuteStatementResult' {consumedIOs} -> consumedIOs) (\s@ExecuteStatementResult' {} a -> s {consumedIOs = a} :: ExecuteStatementResult)
+
+-- | Contains the details of the first fetched page.
+executeStatementResult_firstPage :: Lens.Lens' ExecuteStatementResult (Prelude.Maybe Page)
+executeStatementResult_firstPage = Lens.lens (\ExecuteStatementResult' {firstPage} -> firstPage) (\s@ExecuteStatementResult' {} a -> s {firstPage = a} :: ExecuteStatementResult)
+
+-- | Contains server-side performance information for the command.
+executeStatementResult_timingInformation :: Lens.Lens' ExecuteStatementResult (Prelude.Maybe TimingInformation)
+executeStatementResult_timingInformation = Lens.lens (\ExecuteStatementResult' {timingInformation} -> timingInformation) (\s@ExecuteStatementResult' {} a -> s {timingInformation = a} :: ExecuteStatementResult)
+
+instance Data.FromJSON ExecuteStatementResult where
+  parseJSON =
+    Data.withObject
+      "ExecuteStatementResult"
+      ( \x ->
+          ExecuteStatementResult'
+            Prelude.<$> (x Data..:? "ConsumedIOs")
+            Prelude.<*> (x Data..:? "FirstPage")
+            Prelude.<*> (x Data..:? "TimingInformation")
+      )
+
+instance Prelude.Hashable ExecuteStatementResult where
+  hashWithSalt _salt ExecuteStatementResult' {..} =
+    _salt
+      `Prelude.hashWithSalt` consumedIOs
+      `Prelude.hashWithSalt` firstPage
+      `Prelude.hashWithSalt` timingInformation
+
+instance Prelude.NFData ExecuteStatementResult where
+  rnf ExecuteStatementResult' {..} =
+    Prelude.rnf consumedIOs
+      `Prelude.seq` Prelude.rnf firstPage
+      `Prelude.seq` Prelude.rnf timingInformation
diff --git a/gen/Amazonka/QLDBSession/Types/FetchPageRequest.hs b/gen/Amazonka/QLDBSession/Types/FetchPageRequest.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/FetchPageRequest.hs
@@ -0,0 +1,89 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.FetchPageRequest
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.FetchPageRequest where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | Specifies the details of the page to be fetched.
+--
+-- /See:/ 'newFetchPageRequest' smart constructor.
+data FetchPageRequest = FetchPageRequest'
+  { -- | Specifies the transaction ID of the page to be fetched.
+    transactionId :: Prelude.Text,
+    -- | Specifies the next page token of the page to be fetched.
+    nextPageToken :: Prelude.Text
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'FetchPageRequest' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'transactionId', 'fetchPageRequest_transactionId' - Specifies the transaction ID of the page to be fetched.
+--
+-- 'nextPageToken', 'fetchPageRequest_nextPageToken' - Specifies the next page token of the page to be fetched.
+newFetchPageRequest ::
+  -- | 'transactionId'
+  Prelude.Text ->
+  -- | 'nextPageToken'
+  Prelude.Text ->
+  FetchPageRequest
+newFetchPageRequest pTransactionId_ pNextPageToken_ =
+  FetchPageRequest'
+    { transactionId = pTransactionId_,
+      nextPageToken = pNextPageToken_
+    }
+
+-- | Specifies the transaction ID of the page to be fetched.
+fetchPageRequest_transactionId :: Lens.Lens' FetchPageRequest Prelude.Text
+fetchPageRequest_transactionId = Lens.lens (\FetchPageRequest' {transactionId} -> transactionId) (\s@FetchPageRequest' {} a -> s {transactionId = a} :: FetchPageRequest)
+
+-- | Specifies the next page token of the page to be fetched.
+fetchPageRequest_nextPageToken :: Lens.Lens' FetchPageRequest Prelude.Text
+fetchPageRequest_nextPageToken = Lens.lens (\FetchPageRequest' {nextPageToken} -> nextPageToken) (\s@FetchPageRequest' {} a -> s {nextPageToken = a} :: FetchPageRequest)
+
+instance Prelude.Hashable FetchPageRequest where
+  hashWithSalt _salt FetchPageRequest' {..} =
+    _salt
+      `Prelude.hashWithSalt` transactionId
+      `Prelude.hashWithSalt` nextPageToken
+
+instance Prelude.NFData FetchPageRequest where
+  rnf FetchPageRequest' {..} =
+    Prelude.rnf transactionId
+      `Prelude.seq` Prelude.rnf nextPageToken
+
+instance Data.ToJSON FetchPageRequest where
+  toJSON FetchPageRequest' {..} =
+    Data.object
+      ( Prelude.catMaybes
+          [ Prelude.Just
+              ("TransactionId" Data..= transactionId),
+            Prelude.Just
+              ("NextPageToken" Data..= nextPageToken)
+          ]
+      )
diff --git a/gen/Amazonka/QLDBSession/Types/FetchPageResult.hs b/gen/Amazonka/QLDBSession/Types/FetchPageResult.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/FetchPageResult.hs
@@ -0,0 +1,99 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.FetchPageResult
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.FetchPageResult where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.IOUsage
+import Amazonka.QLDBSession.Types.Page
+import Amazonka.QLDBSession.Types.TimingInformation
+
+-- | Contains the page that was fetched.
+--
+-- /See:/ 'newFetchPageResult' smart constructor.
+data FetchPageResult = FetchPageResult'
+  { -- | Contains metrics about the number of I\/O requests that were consumed.
+    consumedIOs :: Prelude.Maybe IOUsage,
+    -- | Contains details of the fetched page.
+    page :: Prelude.Maybe Page,
+    -- | Contains server-side performance information for the command.
+    timingInformation :: Prelude.Maybe TimingInformation
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'FetchPageResult' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'consumedIOs', 'fetchPageResult_consumedIOs' - Contains metrics about the number of I\/O requests that were consumed.
+--
+-- 'page', 'fetchPageResult_page' - Contains details of the fetched page.
+--
+-- 'timingInformation', 'fetchPageResult_timingInformation' - Contains server-side performance information for the command.
+newFetchPageResult ::
+  FetchPageResult
+newFetchPageResult =
+  FetchPageResult'
+    { consumedIOs = Prelude.Nothing,
+      page = Prelude.Nothing,
+      timingInformation = Prelude.Nothing
+    }
+
+-- | Contains metrics about the number of I\/O requests that were consumed.
+fetchPageResult_consumedIOs :: Lens.Lens' FetchPageResult (Prelude.Maybe IOUsage)
+fetchPageResult_consumedIOs = Lens.lens (\FetchPageResult' {consumedIOs} -> consumedIOs) (\s@FetchPageResult' {} a -> s {consumedIOs = a} :: FetchPageResult)
+
+-- | Contains details of the fetched page.
+fetchPageResult_page :: Lens.Lens' FetchPageResult (Prelude.Maybe Page)
+fetchPageResult_page = Lens.lens (\FetchPageResult' {page} -> page) (\s@FetchPageResult' {} a -> s {page = a} :: FetchPageResult)
+
+-- | Contains server-side performance information for the command.
+fetchPageResult_timingInformation :: Lens.Lens' FetchPageResult (Prelude.Maybe TimingInformation)
+fetchPageResult_timingInformation = Lens.lens (\FetchPageResult' {timingInformation} -> timingInformation) (\s@FetchPageResult' {} a -> s {timingInformation = a} :: FetchPageResult)
+
+instance Data.FromJSON FetchPageResult where
+  parseJSON =
+    Data.withObject
+      "FetchPageResult"
+      ( \x ->
+          FetchPageResult'
+            Prelude.<$> (x Data..:? "ConsumedIOs")
+            Prelude.<*> (x Data..:? "Page")
+            Prelude.<*> (x Data..:? "TimingInformation")
+      )
+
+instance Prelude.Hashable FetchPageResult where
+  hashWithSalt _salt FetchPageResult' {..} =
+    _salt
+      `Prelude.hashWithSalt` consumedIOs
+      `Prelude.hashWithSalt` page
+      `Prelude.hashWithSalt` timingInformation
+
+instance Prelude.NFData FetchPageResult where
+  rnf FetchPageResult' {..} =
+    Prelude.rnf consumedIOs
+      `Prelude.seq` Prelude.rnf page
+      `Prelude.seq` Prelude.rnf timingInformation
diff --git a/gen/Amazonka/QLDBSession/Types/IOUsage.hs b/gen/Amazonka/QLDBSession/Types/IOUsage.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/IOUsage.hs
@@ -0,0 +1,84 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.IOUsage
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.IOUsage where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | Contains I\/O usage metrics for a command that was invoked.
+--
+-- /See:/ 'newIOUsage' smart constructor.
+data IOUsage = IOUsage'
+  { -- | The number of read I\/O requests that the command made.
+    readIOs :: Prelude.Maybe Prelude.Integer,
+    -- | The number of write I\/O requests that the command made.
+    writeIOs :: Prelude.Maybe Prelude.Integer
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'IOUsage' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'readIOs', 'iOUsage_readIOs' - The number of read I\/O requests that the command made.
+--
+-- 'writeIOs', 'iOUsage_writeIOs' - The number of write I\/O requests that the command made.
+newIOUsage ::
+  IOUsage
+newIOUsage =
+  IOUsage'
+    { readIOs = Prelude.Nothing,
+      writeIOs = Prelude.Nothing
+    }
+
+-- | The number of read I\/O requests that the command made.
+iOUsage_readIOs :: Lens.Lens' IOUsage (Prelude.Maybe Prelude.Integer)
+iOUsage_readIOs = Lens.lens (\IOUsage' {readIOs} -> readIOs) (\s@IOUsage' {} a -> s {readIOs = a} :: IOUsage)
+
+-- | The number of write I\/O requests that the command made.
+iOUsage_writeIOs :: Lens.Lens' IOUsage (Prelude.Maybe Prelude.Integer)
+iOUsage_writeIOs = Lens.lens (\IOUsage' {writeIOs} -> writeIOs) (\s@IOUsage' {} a -> s {writeIOs = a} :: IOUsage)
+
+instance Data.FromJSON IOUsage where
+  parseJSON =
+    Data.withObject
+      "IOUsage"
+      ( \x ->
+          IOUsage'
+            Prelude.<$> (x Data..:? "ReadIOs")
+            Prelude.<*> (x Data..:? "WriteIOs")
+      )
+
+instance Prelude.Hashable IOUsage where
+  hashWithSalt _salt IOUsage' {..} =
+    _salt
+      `Prelude.hashWithSalt` readIOs
+      `Prelude.hashWithSalt` writeIOs
+
+instance Prelude.NFData IOUsage where
+  rnf IOUsage' {..} =
+    Prelude.rnf readIOs
+      `Prelude.seq` Prelude.rnf writeIOs
diff --git a/gen/Amazonka/QLDBSession/Types/Page.hs b/gen/Amazonka/QLDBSession/Types/Page.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/Page.hs
@@ -0,0 +1,85 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.Page
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.Page where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.ValueHolder
+
+-- | Contains details of the fetched page.
+--
+-- /See:/ 'newPage' smart constructor.
+data Page = Page'
+  { -- | The token of the next page.
+    nextPageToken :: Prelude.Maybe Prelude.Text,
+    -- | A structure that contains values in multiple encoding formats.
+    values :: Prelude.Maybe [ValueHolder]
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'Page' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'nextPageToken', 'page_nextPageToken' - The token of the next page.
+--
+-- 'values', 'page_values' - A structure that contains values in multiple encoding formats.
+newPage ::
+  Page
+newPage =
+  Page'
+    { nextPageToken = Prelude.Nothing,
+      values = Prelude.Nothing
+    }
+
+-- | The token of the next page.
+page_nextPageToken :: Lens.Lens' Page (Prelude.Maybe Prelude.Text)
+page_nextPageToken = Lens.lens (\Page' {nextPageToken} -> nextPageToken) (\s@Page' {} a -> s {nextPageToken = a} :: Page)
+
+-- | A structure that contains values in multiple encoding formats.
+page_values :: Lens.Lens' Page (Prelude.Maybe [ValueHolder])
+page_values = Lens.lens (\Page' {values} -> values) (\s@Page' {} a -> s {values = a} :: Page) Prelude.. Lens.mapping Lens.coerced
+
+instance Data.FromJSON Page where
+  parseJSON =
+    Data.withObject
+      "Page"
+      ( \x ->
+          Page'
+            Prelude.<$> (x Data..:? "NextPageToken")
+            Prelude.<*> (x Data..:? "Values" Data..!= Prelude.mempty)
+      )
+
+instance Prelude.Hashable Page where
+  hashWithSalt _salt Page' {..} =
+    _salt
+      `Prelude.hashWithSalt` nextPageToken
+      `Prelude.hashWithSalt` values
+
+instance Prelude.NFData Page where
+  rnf Page' {..} =
+    Prelude.rnf nextPageToken
+      `Prelude.seq` Prelude.rnf values
diff --git a/gen/Amazonka/QLDBSession/Types/StartSessionRequest.hs b/gen/Amazonka/QLDBSession/Types/StartSessionRequest.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/StartSessionRequest.hs
@@ -0,0 +1,68 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.StartSessionRequest
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.StartSessionRequest where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | Specifies a request to start a new session.
+--
+-- /See:/ 'newStartSessionRequest' smart constructor.
+data StartSessionRequest = StartSessionRequest'
+  { -- | The name of the ledger to start a new session against.
+    ledgerName :: Prelude.Text
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'StartSessionRequest' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'ledgerName', 'startSessionRequest_ledgerName' - The name of the ledger to start a new session against.
+newStartSessionRequest ::
+  -- | 'ledgerName'
+  Prelude.Text ->
+  StartSessionRequest
+newStartSessionRequest pLedgerName_ =
+  StartSessionRequest' {ledgerName = pLedgerName_}
+
+-- | The name of the ledger to start a new session against.
+startSessionRequest_ledgerName :: Lens.Lens' StartSessionRequest Prelude.Text
+startSessionRequest_ledgerName = Lens.lens (\StartSessionRequest' {ledgerName} -> ledgerName) (\s@StartSessionRequest' {} a -> s {ledgerName = a} :: StartSessionRequest)
+
+instance Prelude.Hashable StartSessionRequest where
+  hashWithSalt _salt StartSessionRequest' {..} =
+    _salt `Prelude.hashWithSalt` ledgerName
+
+instance Prelude.NFData StartSessionRequest where
+  rnf StartSessionRequest' {..} = Prelude.rnf ledgerName
+
+instance Data.ToJSON StartSessionRequest where
+  toJSON StartSessionRequest' {..} =
+    Data.object
+      ( Prelude.catMaybes
+          [Prelude.Just ("LedgerName" Data..= ledgerName)]
+      )
diff --git a/gen/Amazonka/QLDBSession/Types/StartSessionResult.hs b/gen/Amazonka/QLDBSession/Types/StartSessionResult.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/StartSessionResult.hs
@@ -0,0 +1,88 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.StartSessionResult
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.StartSessionResult where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.TimingInformation
+
+-- | Contains the details of the started session.
+--
+-- /See:/ 'newStartSessionResult' smart constructor.
+data StartSessionResult = StartSessionResult'
+  { -- | Session token of the started session. This @SessionToken@ is required
+    -- for every subsequent command that is issued during the current session.
+    sessionToken :: Prelude.Maybe Prelude.Text,
+    -- | Contains server-side performance information for the command.
+    timingInformation :: Prelude.Maybe TimingInformation
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'StartSessionResult' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'sessionToken', 'startSessionResult_sessionToken' - Session token of the started session. This @SessionToken@ is required
+-- for every subsequent command that is issued during the current session.
+--
+-- 'timingInformation', 'startSessionResult_timingInformation' - Contains server-side performance information for the command.
+newStartSessionResult ::
+  StartSessionResult
+newStartSessionResult =
+  StartSessionResult'
+    { sessionToken = Prelude.Nothing,
+      timingInformation = Prelude.Nothing
+    }
+
+-- | Session token of the started session. This @SessionToken@ is required
+-- for every subsequent command that is issued during the current session.
+startSessionResult_sessionToken :: Lens.Lens' StartSessionResult (Prelude.Maybe Prelude.Text)
+startSessionResult_sessionToken = Lens.lens (\StartSessionResult' {sessionToken} -> sessionToken) (\s@StartSessionResult' {} a -> s {sessionToken = a} :: StartSessionResult)
+
+-- | Contains server-side performance information for the command.
+startSessionResult_timingInformation :: Lens.Lens' StartSessionResult (Prelude.Maybe TimingInformation)
+startSessionResult_timingInformation = Lens.lens (\StartSessionResult' {timingInformation} -> timingInformation) (\s@StartSessionResult' {} a -> s {timingInformation = a} :: StartSessionResult)
+
+instance Data.FromJSON StartSessionResult where
+  parseJSON =
+    Data.withObject
+      "StartSessionResult"
+      ( \x ->
+          StartSessionResult'
+            Prelude.<$> (x Data..:? "SessionToken")
+            Prelude.<*> (x Data..:? "TimingInformation")
+      )
+
+instance Prelude.Hashable StartSessionResult where
+  hashWithSalt _salt StartSessionResult' {..} =
+    _salt
+      `Prelude.hashWithSalt` sessionToken
+      `Prelude.hashWithSalt` timingInformation
+
+instance Prelude.NFData StartSessionResult where
+  rnf StartSessionResult' {..} =
+    Prelude.rnf sessionToken
+      `Prelude.seq` Prelude.rnf timingInformation
diff --git a/gen/Amazonka/QLDBSession/Types/StartTransactionRequest.hs b/gen/Amazonka/QLDBSession/Types/StartTransactionRequest.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/StartTransactionRequest.hs
@@ -0,0 +1,51 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.StartTransactionRequest
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.StartTransactionRequest where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | Specifies a request to start a transaction.
+--
+-- /See:/ 'newStartTransactionRequest' smart constructor.
+data StartTransactionRequest = StartTransactionRequest'
+  {
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'StartTransactionRequest' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+newStartTransactionRequest ::
+  StartTransactionRequest
+newStartTransactionRequest = StartTransactionRequest'
+
+instance Prelude.Hashable StartTransactionRequest where
+  hashWithSalt _salt _ =
+    _salt `Prelude.hashWithSalt` ()
+
+instance Prelude.NFData StartTransactionRequest where
+  rnf _ = ()
+
+instance Data.ToJSON StartTransactionRequest where
+  toJSON = Prelude.const (Data.Object Prelude.mempty)
diff --git a/gen/Amazonka/QLDBSession/Types/StartTransactionResult.hs b/gen/Amazonka/QLDBSession/Types/StartTransactionResult.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/StartTransactionResult.hs
@@ -0,0 +1,86 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.StartTransactionResult
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.StartTransactionResult where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Types.TimingInformation
+
+-- | Contains the details of the started transaction.
+--
+-- /See:/ 'newStartTransactionResult' smart constructor.
+data StartTransactionResult = StartTransactionResult'
+  { -- | Contains server-side performance information for the command.
+    timingInformation :: Prelude.Maybe TimingInformation,
+    -- | The transaction ID of the started transaction.
+    transactionId :: Prelude.Maybe Prelude.Text
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'StartTransactionResult' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'timingInformation', 'startTransactionResult_timingInformation' - Contains server-side performance information for the command.
+--
+-- 'transactionId', 'startTransactionResult_transactionId' - The transaction ID of the started transaction.
+newStartTransactionResult ::
+  StartTransactionResult
+newStartTransactionResult =
+  StartTransactionResult'
+    { timingInformation =
+        Prelude.Nothing,
+      transactionId = Prelude.Nothing
+    }
+
+-- | Contains server-side performance information for the command.
+startTransactionResult_timingInformation :: Lens.Lens' StartTransactionResult (Prelude.Maybe TimingInformation)
+startTransactionResult_timingInformation = Lens.lens (\StartTransactionResult' {timingInformation} -> timingInformation) (\s@StartTransactionResult' {} a -> s {timingInformation = a} :: StartTransactionResult)
+
+-- | The transaction ID of the started transaction.
+startTransactionResult_transactionId :: Lens.Lens' StartTransactionResult (Prelude.Maybe Prelude.Text)
+startTransactionResult_transactionId = Lens.lens (\StartTransactionResult' {transactionId} -> transactionId) (\s@StartTransactionResult' {} a -> s {transactionId = a} :: StartTransactionResult)
+
+instance Data.FromJSON StartTransactionResult where
+  parseJSON =
+    Data.withObject
+      "StartTransactionResult"
+      ( \x ->
+          StartTransactionResult'
+            Prelude.<$> (x Data..:? "TimingInformation")
+            Prelude.<*> (x Data..:? "TransactionId")
+      )
+
+instance Prelude.Hashable StartTransactionResult where
+  hashWithSalt _salt StartTransactionResult' {..} =
+    _salt
+      `Prelude.hashWithSalt` timingInformation
+      `Prelude.hashWithSalt` transactionId
+
+instance Prelude.NFData StartTransactionResult where
+  rnf StartTransactionResult' {..} =
+    Prelude.rnf timingInformation
+      `Prelude.seq` Prelude.rnf transactionId
diff --git a/gen/Amazonka/QLDBSession/Types/TimingInformation.hs b/gen/Amazonka/QLDBSession/Types/TimingInformation.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/TimingInformation.hs
@@ -0,0 +1,78 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.TimingInformation
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.TimingInformation where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | Contains server-side performance information for a command. Amazon QLDB
+-- captures timing information between the times when it receives the
+-- request and when it sends the corresponding response.
+--
+-- /See:/ 'newTimingInformation' smart constructor.
+data TimingInformation = TimingInformation'
+  { -- | The amount of time that QLDB spent on processing the command, measured
+    -- in milliseconds.
+    processingTimeMilliseconds :: Prelude.Maybe Prelude.Integer
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'TimingInformation' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'processingTimeMilliseconds', 'timingInformation_processingTimeMilliseconds' - The amount of time that QLDB spent on processing the command, measured
+-- in milliseconds.
+newTimingInformation ::
+  TimingInformation
+newTimingInformation =
+  TimingInformation'
+    { processingTimeMilliseconds =
+        Prelude.Nothing
+    }
+
+-- | The amount of time that QLDB spent on processing the command, measured
+-- in milliseconds.
+timingInformation_processingTimeMilliseconds :: Lens.Lens' TimingInformation (Prelude.Maybe Prelude.Integer)
+timingInformation_processingTimeMilliseconds = Lens.lens (\TimingInformation' {processingTimeMilliseconds} -> processingTimeMilliseconds) (\s@TimingInformation' {} a -> s {processingTimeMilliseconds = a} :: TimingInformation)
+
+instance Data.FromJSON TimingInformation where
+  parseJSON =
+    Data.withObject
+      "TimingInformation"
+      ( \x ->
+          TimingInformation'
+            Prelude.<$> (x Data..:? "ProcessingTimeMilliseconds")
+      )
+
+instance Prelude.Hashable TimingInformation where
+  hashWithSalt _salt TimingInformation' {..} =
+    _salt
+      `Prelude.hashWithSalt` processingTimeMilliseconds
+
+instance Prelude.NFData TimingInformation where
+  rnf TimingInformation' {..} =
+    Prelude.rnf processingTimeMilliseconds
diff --git a/gen/Amazonka/QLDBSession/Types/ValueHolder.hs b/gen/Amazonka/QLDBSession/Types/ValueHolder.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Types/ValueHolder.hs
@@ -0,0 +1,101 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# OPTIONS_GHC -fno-warn-unused-matches #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Types.ValueHolder
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Types.ValueHolder where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+
+-- | A structure that can contain a value in multiple encoding formats.
+--
+-- /See:/ 'newValueHolder' smart constructor.
+data ValueHolder = ValueHolder'
+  { -- | An Amazon Ion binary value contained in a @ValueHolder@ structure.
+    ionBinary :: Prelude.Maybe Data.Base64,
+    -- | An Amazon Ion plaintext value contained in a @ValueHolder@ structure.
+    ionText :: Prelude.Maybe Prelude.Text
+  }
+  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)
+
+-- |
+-- Create a value of 'ValueHolder' with all optional fields omitted.
+--
+-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
+--
+-- The following record fields are available, with the corresponding lenses provided
+-- for backwards compatibility:
+--
+-- 'ionBinary', 'valueHolder_ionBinary' - An Amazon Ion binary value contained in a @ValueHolder@ structure.--
+-- -- /Note:/ This 'Lens' automatically encodes and decodes Base64 data.
+-- -- The underlying isomorphism will encode to Base64 representation during
+-- -- serialisation, and decode from Base64 representation during deserialisation.
+-- -- This 'Lens' accepts and returns only raw unencoded data.
+--
+-- 'ionText', 'valueHolder_ionText' - An Amazon Ion plaintext value contained in a @ValueHolder@ structure.
+newValueHolder ::
+  ValueHolder
+newValueHolder =
+  ValueHolder'
+    { ionBinary = Prelude.Nothing,
+      ionText = Prelude.Nothing
+    }
+
+-- | An Amazon Ion binary value contained in a @ValueHolder@ structure.--
+-- -- /Note:/ This 'Lens' automatically encodes and decodes Base64 data.
+-- -- The underlying isomorphism will encode to Base64 representation during
+-- -- serialisation, and decode from Base64 representation during deserialisation.
+-- -- This 'Lens' accepts and returns only raw unencoded data.
+valueHolder_ionBinary :: Lens.Lens' ValueHolder (Prelude.Maybe Prelude.ByteString)
+valueHolder_ionBinary = Lens.lens (\ValueHolder' {ionBinary} -> ionBinary) (\s@ValueHolder' {} a -> s {ionBinary = a} :: ValueHolder) Prelude.. Lens.mapping Data._Base64
+
+-- | An Amazon Ion plaintext value contained in a @ValueHolder@ structure.
+valueHolder_ionText :: Lens.Lens' ValueHolder (Prelude.Maybe Prelude.Text)
+valueHolder_ionText = Lens.lens (\ValueHolder' {ionText} -> ionText) (\s@ValueHolder' {} a -> s {ionText = a} :: ValueHolder)
+
+instance Data.FromJSON ValueHolder where
+  parseJSON =
+    Data.withObject
+      "ValueHolder"
+      ( \x ->
+          ValueHolder'
+            Prelude.<$> (x Data..:? "IonBinary")
+            Prelude.<*> (x Data..:? "IonText")
+      )
+
+instance Prelude.Hashable ValueHolder where
+  hashWithSalt _salt ValueHolder' {..} =
+    _salt
+      `Prelude.hashWithSalt` ionBinary
+      `Prelude.hashWithSalt` ionText
+
+instance Prelude.NFData ValueHolder where
+  rnf ValueHolder' {..} =
+    Prelude.rnf ionBinary
+      `Prelude.seq` Prelude.rnf ionText
+
+instance Data.ToJSON ValueHolder where
+  toJSON ValueHolder' {..} =
+    Data.object
+      ( Prelude.catMaybes
+          [ ("IonBinary" Data..=) Prelude.<$> ionBinary,
+            ("IonText" Data..=) Prelude.<$> ionText
+          ]
+      )
diff --git a/gen/Amazonka/QLDBSession/Waiters.hs b/gen/Amazonka/QLDBSession/Waiters.hs
new file mode 100644
--- /dev/null
+++ b/gen/Amazonka/QLDBSession/Waiters.hs
@@ -0,0 +1,24 @@
+{-# LANGUAGE DisambiguateRecordFields #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Amazonka.QLDBSession.Waiters
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Amazonka.QLDBSession.Waiters where
+
+import qualified Amazonka.Core as Core
+import qualified Amazonka.Core.Lens.Internal as Lens
+import qualified Amazonka.Data as Data
+import qualified Amazonka.Prelude as Prelude
+import Amazonka.QLDBSession.Lens
+import Amazonka.QLDBSession.Types
diff --git a/src/.gitkeep b/src/.gitkeep
new file mode 100644
--- /dev/null
+++ b/src/.gitkeep
diff --git a/test/Main.hs b/test/Main.hs
new file mode 100644
--- /dev/null
+++ b/test/Main.hs
@@ -0,0 +1,23 @@
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- |
+-- Module      : Main
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Main (main) where
+
+import Test.Amazonka.QLDBSession
+import Test.Amazonka.QLDBSession.Internal
+import Test.Tasty
+
+main :: IO ()
+main =
+  defaultMain $
+    testGroup
+      "QLDBSession"
+      [ testGroup "tests" tests,
+        testGroup "fixtures" fixtures
+      ]
diff --git a/test/Test/Amazonka/Gen/QLDBSession.hs b/test/Test/Amazonka/Gen/QLDBSession.hs
new file mode 100644
--- /dev/null
+++ b/test/Test/Amazonka/Gen/QLDBSession.hs
@@ -0,0 +1,58 @@
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
+
+-- Derived from AWS service descriptions, licensed under Apache 2.0.
+
+-- |
+-- Module      : Test.Amazonka.Gen.QLDBSession
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Test.Amazonka.Gen.QLDBSession where
+
+import Amazonka.QLDBSession
+import qualified Data.Proxy as Proxy
+import Test.Amazonka.Fixture
+import Test.Amazonka.Prelude
+import Test.Amazonka.QLDBSession.Internal
+import Test.Tasty
+
+-- Auto-generated: the actual test selection needs to be manually placed into
+-- the top-level so that real test data can be incrementally added.
+--
+-- This commented snippet is what the entire set should look like:
+
+-- fixtures :: TestTree
+-- fixtures =
+--     [ testGroup "request"
+--         [ requestSendCommand $
+--             newSendCommand
+--
+--           ]
+
+--     , testGroup "response"
+--         [ responseSendCommand $
+--             newSendCommandResponse
+--
+--           ]
+--     ]
+
+-- Requests
+
+requestSendCommand :: SendCommand -> TestTree
+requestSendCommand =
+  req
+    "SendCommand"
+    "fixture/SendCommand.yaml"
+
+-- Responses
+
+responseSendCommand :: SendCommandResponse -> TestTree
+responseSendCommand =
+  res
+    "SendCommandResponse"
+    "fixture/SendCommandResponse.proto"
+    defaultService
+    (Proxy.Proxy :: Proxy.Proxy SendCommand)
diff --git a/test/Test/Amazonka/QLDBSession.hs b/test/Test/Amazonka/QLDBSession.hs
new file mode 100644
--- /dev/null
+++ b/test/Test/Amazonka/QLDBSession.hs
@@ -0,0 +1,20 @@
+-- |
+-- Module      : Test.Amazonka.QLDBSession
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Test.Amazonka.QLDBSession
+  ( tests,
+    fixtures,
+  )
+where
+
+import Test.Tasty (TestTree)
+
+tests :: [TestTree]
+tests = []
+
+fixtures :: [TestTree]
+fixtures = []
diff --git a/test/Test/Amazonka/QLDBSession/Internal.hs b/test/Test/Amazonka/QLDBSession/Internal.hs
new file mode 100644
--- /dev/null
+++ b/test/Test/Amazonka/QLDBSession/Internal.hs
@@ -0,0 +1,8 @@
+-- |
+-- Module      : Test.Amazonka.QLDBSession.Internal
+-- Copyright   : (c) 2013-2023 Brendan Hay
+-- License     : Mozilla Public License, v. 2.0.
+-- Maintainer  : Brendan Hay
+-- Stability   : auto-generated
+-- Portability : non-portable (GHC extensions)
+module Test.Amazonka.QLDBSession.Internal where
