grakn alternatives and similar packages
Based on the "Database" category.
Alternatively, view grakn alternatives based on common mentions on social networks and blogs.
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erd
Translates a plain text description of a relational database schema to a graphical entity-relationship diagram. -
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HDBC-session
This repository includes a joined query generator based on typefull relational algebra, and mapping tools between SQL values list and Haskell record type. -
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groundhog
This library maps datatypes to a relational model, in a way similar to what ORM libraries do in OOP. See the tutorial https://www.schoolofhaskell.com/user/lykahb/groundhog for introduction -
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mysql-simple
A mid-level client library for the MySQL database, intended to be fast and easy to use. -
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dbmigrations
DISCONTINUED. A library for the creation, management, and installation of schema updates for relational databases. -
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ampersand
Build database applications faster than anyone else, and keep your data pollution free as a bonus. -
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hsparql
hsparql includes a DSL to easily create queries, as well as methods to submit those queries to a SPARQL server, returning the results as simple Haskell data structures.
InfluxDB - Purpose built for real-time analytics at any scale.
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README
Grakn Haskell Client (DEPRECATED)
A Haskell client for Grakn.
Requires Grakn 1.0.0.
Installation
To install the Grakn client, simply add this to your cabal file:
build-depends: grakn
You will also need access to a Grakn database. Head here to get started with Grakn.
Quickstart
Begin by importing the client:
{-# LANGUAGE OverloadedStrings #-}
module Example where
import Grakn
import Data.Function ((&))
Define the type labels:
person :: Label
person = label "person"
husband :: Label
husband = label "husband"
wife :: Label
wife = label "wife"
marriage :: Label
marriage = label "marriage"
Define the variables:
x :: Var
x = var "x"
y :: Var
y = var "y"
We can translate the following query into Haskell:
match $x isa person, (husband: $x, wife: $y) isa marriage; get $y;
query :: GetQuery
query = match
[ x `isa` person
, rel [husband .: x, wife .: y] `isa` marriage
] & get [y]
We can also use infix functions like (-:) instead of isa:
otherQuery :: GetQuery
otherQuery = match
[ x -: person
, rel [husband .: x, wife .: y] -: marriage
] & get [y]
To execute and print the results of our query:
client :: Client
client = Client defaultUrl "my-keyspace"
main :: IO ()
main = do
result <- execute client query
print result