diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,22 @@
+Copyright (c) 2019, Nikita Volkov
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/hasql-implicits.cabal b/hasql-implicits.cabal
new file mode 100644
--- /dev/null
+++ b/hasql-implicits.cabal
@@ -0,0 +1,39 @@
+name: hasql-implicits
+version: 0.1
+synopsis: Toolkit for constructing Hasql statements dynamically
+homepage: https://github.com/nikita-volkov/hasql-implicits
+bug-reports: https://github.com/nikita-volkov/hasql-implicits/issues
+author: Nikita Volkov <nikita.y.volkov@mail.ru>
+maintainer: Nikita Volkov <nikita.y.volkov@mail.ru>
+copyright: (c) 2019, Nikita Volkov
+license: MIT
+license-file: LICENSE
+build-type: Simple
+cabal-version: >=1.10
+
+source-repository head
+  type: git
+  location: git://github.com/nikita-volkov/hasql-implicits.git
+
+library
+  hs-source-dirs: library
+  default-extensions: BangPatterns, DeriveDataTypeable, DeriveGeneric, DeriveFunctor, DeriveTraversable, GeneralizedNewtypeDeriving, FlexibleContexts, FlexibleInstances, LambdaCase, NoImplicitPrelude, OverloadedStrings, RankNTypes, ScopedTypeVariables, StandaloneDeriving, TypeApplications, TypeFamilies
+  ghc-options: -funbox-strict-fields
+  default-language: Haskell2010
+  exposed-modules:
+    Hasql.Implicits.Encoders
+  other-modules:
+    Hasql.Implicits.Prelude
+  build-depends:
+    aeson >=1 && <2,
+    base >=4.12 && <5,
+    bytestring >=0.10 && <0.11,
+    containers >=0.6 && <0.7,
+    hasql >=1.4 && <1.5,
+    network-ip >=0.2 && <1,
+    ptr >=0.16.6 && <0.17,
+    scientific >=0.2 && <0.4,
+    text >=1 && <2,
+    time >=1.4 && <2,
+    uuid >=1.3 && <1.4,
+    vector >=0.10 && <0.13
diff --git a/library/Hasql/Implicits/Encoders.hs b/library/Hasql/Implicits/Encoders.hs
new file mode 100644
--- /dev/null
+++ b/library/Hasql/Implicits/Encoders.hs
@@ -0,0 +1,91 @@
+{-# LANGUAGE CPP #-}
+module Hasql.Implicits.Encoders where
+
+import Hasql.Implicits.Prelude
+import Hasql.Encoders
+import qualified Data.Aeson as Aeson
+
+
+{-| Provides a default implementation of parameter encoder. -}
+class DefaultParamEncoder a where
+  {-| Default parameter encoder with nullability specified. -}
+  defaultParam :: NullableOrNot Value a
+
+#define RIGHT_QUOTED(a) a'
+#define INSTANCES(VALUE, ENCODER) \
+instance DefaultParamEncoder VALUE where { \
+  defaultParam = nonNullable ENCODER; \
+}; \
+instance DefaultParamEncoder [VALUE] where { \
+  defaultParam = (nonNullable . array . dimension RIGHT_QUOTED(foldl) . element . nonNullable) ENCODER; \
+}; \
+instance DefaultParamEncoder [Maybe VALUE] where { \
+  defaultParam = (nonNullable . array . dimension RIGHT_QUOTED(foldl) . element . nullable) ENCODER; \
+}; \
+instance DefaultParamEncoder [[VALUE]] where { \
+  defaultParam = (nonNullable . array . dimension RIGHT_QUOTED(foldl) . dimension RIGHT_QUOTED(foldl) . element . nonNullable) ENCODER; \
+}; \
+instance DefaultParamEncoder [[Maybe VALUE]] where { \
+  defaultParam = (nonNullable . array . dimension RIGHT_QUOTED(foldl) . dimension RIGHT_QUOTED(foldl) . element . nullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Vector VALUE) where { \
+  defaultParam = (nonNullable . array . dimension RIGHT_QUOTED(foldl) . element . nonNullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Vector (Maybe VALUE)) where { \
+  defaultParam = (nonNullable . array . dimension RIGHT_QUOTED(foldl) . element . nullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Vector (Vector VALUE)) where { \
+  defaultParam = (nonNullable . array . dimension RIGHT_QUOTED(foldl) . dimension RIGHT_QUOTED(foldl) . element . nonNullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Vector (Vector (Maybe VALUE))) where { \
+  defaultParam = (nonNullable . array . dimension RIGHT_QUOTED(foldl) . dimension RIGHT_QUOTED(foldl) . element . nullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe VALUE) where { \
+  defaultParam = nullable ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe [VALUE]) where { \
+  defaultParam = (nullable . array . dimension RIGHT_QUOTED(foldl) . element . nonNullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe [Maybe VALUE]) where { \
+  defaultParam = (nullable . array . dimension RIGHT_QUOTED(foldl) . element . nullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe [[VALUE]]) where { \
+  defaultParam = (nullable . array . dimension RIGHT_QUOTED(foldl) . dimension RIGHT_QUOTED(foldl) . element . nonNullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe [[Maybe VALUE]]) where { \
+  defaultParam = (nullable . array . dimension RIGHT_QUOTED(foldl) . dimension RIGHT_QUOTED(foldl) . element . nullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe (Vector VALUE)) where { \
+  defaultParam = (nullable . array . dimension RIGHT_QUOTED(foldl) . element . nonNullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe (Vector (Maybe VALUE))) where { \
+  defaultParam = (nullable . array . dimension RIGHT_QUOTED(foldl) . element . nullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe (Vector (Vector VALUE))) where { \
+  defaultParam = (nullable . array . dimension RIGHT_QUOTED(foldl) . dimension RIGHT_QUOTED(foldl) . element . nonNullable) ENCODER; \
+}; \
+instance DefaultParamEncoder (Maybe (Vector (Vector (Maybe VALUE)))) where { \
+  defaultParam = (nullable . array . dimension RIGHT_QUOTED(foldl) . dimension RIGHT_QUOTED(foldl) . element . nullable) ENCODER; \
+}
+
+INSTANCES(Char, char)
+INSTANCES(Double, float8)
+INSTANCES(Float, float4)
+INSTANCES(Int16, int2)
+INSTANCES(Int32, int4)
+INSTANCES(Int64, int8)
+INSTANCES(ByteString, bytea)
+INSTANCES(Scientific, numeric)
+INSTANCES(Text, text)
+INSTANCES(UTCTime, timestamptz)
+INSTANCES(Aeson.Value, jsonb)
+INSTANCES(UUID, uuid)
+INSTANCES(Day, date)
+INSTANCES(DiffTime, interval)
+INSTANCES(TimeOfDay, time)
+INSTANCES(LocalTime, timestamp)
+INSTANCES((TimeOfDay, TimeZone), timetz)
+INSTANCES((NetAddr IP), inet)
+
+#undef INSTANCES
+#undef RIGHT_QUOTED
diff --git a/library/Hasql/Implicits/Prelude.hs b/library/Hasql/Implicits/Prelude.hs
new file mode 100644
--- /dev/null
+++ b/library/Hasql/Implicits/Prelude.hs
@@ -0,0 +1,106 @@
+module Hasql.Implicits.Prelude
+(
+  module Exports,
+)
+where
+
+
+-- base
+-------------------------
+import Control.Applicative as Exports
+import Control.Arrow as Exports
+import Control.Category as Exports
+import Control.Concurrent as Exports
+import Control.Exception as Exports
+import Control.Monad as Exports hiding (fail, mapM_, sequence_, forM_, msum, mapM, sequence, forM)
+import Control.Monad.IO.Class as Exports
+import Control.Monad.Fail as Exports
+import Control.Monad.Fix as Exports hiding (fix)
+import Control.Monad.ST as Exports
+import Data.Bits as Exports
+import Data.Bool as Exports
+import Data.Char as Exports
+import Data.Coerce as Exports
+import Data.Complex as Exports
+import Data.Data as Exports
+import Data.Dynamic as Exports
+import Data.Either as Exports
+import Data.Fixed as Exports
+import Data.Foldable as Exports hiding (toList)
+import Data.Function as Exports hiding (id, (.))
+import Data.Functor as Exports
+import Data.Functor.Contravariant as Exports
+import Data.Functor.Identity as Exports
+import Data.Int as Exports
+import Data.IORef as Exports
+import Data.Ix as Exports
+import Data.List as Exports hiding (sortOn, isSubsequenceOf, uncons, concat, foldr, foldl1, maximum, minimum, product, sum, all, and, any, concatMap, elem, foldl, foldr1, notElem, or, find, maximumBy, minimumBy, mapAccumL, mapAccumR, foldl')
+import Data.Maybe as Exports
+import Data.Monoid as Exports hiding (Last(..), First(..), (<>))
+import Data.Ord as Exports
+import Data.Proxy as Exports
+import Data.Ratio as Exports
+import Data.Semigroup as Exports
+import Data.STRef as Exports
+import Data.String as Exports
+import Data.Traversable as Exports
+import Data.Tuple as Exports
+import Data.Unique as Exports
+import Data.Version as Exports
+import Data.Word as Exports
+import Debug.Trace as Exports
+import Foreign.ForeignPtr as Exports
+import Foreign.Ptr as Exports
+import Foreign.StablePtr as Exports
+import Foreign.Storable as Exports hiding (sizeOf, alignment)
+import GHC.Conc as Exports hiding (withMVar, threadWaitWriteSTM, threadWaitWrite, threadWaitReadSTM, threadWaitRead)
+import GHC.Exts as Exports (lazy, inline, sortWith, groupWith, IsList(..))
+import GHC.Generics as Exports (Generic, Generic1)
+import GHC.IO.Exception as Exports
+import Numeric as Exports
+import Prelude as Exports hiding (fail, concat, foldr, mapM_, sequence_, foldl1, maximum, minimum, product, sum, all, and, any, concatMap, elem, foldl, foldr1, notElem, or, mapM, sequence, id, (.))
+import System.Environment as Exports
+import System.Exit as Exports
+import System.IO as Exports
+import System.IO.Error as Exports
+import System.IO.Unsafe as Exports
+import System.Mem as Exports
+import System.Mem.StableName as Exports
+import System.Timeout as Exports
+import Text.ParserCombinators.ReadP as Exports (ReadP, ReadS, readP_to_S, readS_to_P)
+import Text.ParserCombinators.ReadPrec as Exports (ReadPrec, readPrec_to_P, readP_to_Prec, readPrec_to_S, readS_to_Prec)
+import Text.Printf as Exports (printf, hPrintf)
+import Text.Read as Exports (Read(..), readMaybe, readEither)
+import Unsafe.Coerce as Exports
+
+-- containers
+-------------------------
+import Data.Sequence as Exports (Seq)
+
+-- bytestring
+-------------------------
+import Data.ByteString as Exports (ByteString)
+
+-- text
+-------------------------
+import Data.Text as Exports (Text)
+
+-- vector
+-------------------------
+import Data.Vector as Exports (Vector)
+
+-- scientific
+-------------------------
+import Data.Scientific as Exports (Scientific)
+
+-- uuid
+-------------------------
+import Data.UUID as Exports (UUID)
+
+-- time
+-------------------------
+import Data.Time as Exports
+
+-- network-ip
+-------------------------
+import Network.IP.Addr as Exports (NetAddr, IP)
