PostgreSQL.jl

An interface to PostgreSQL from Julia. Uses libpq (the C PostgreSQL API) and obeys the DBI.jl protocol.

Maintenance Notice

I can no longer spend work time on this so this project is in maintenance mode (accepting PRs and attempting to resolve issues). New code on the dbapi branch (https://github.com/JuliaDatabases/DBAPI.jl) represents the most recent work, which I will continue if I am in a position to do so again.

Usage

using DBI
using PostgreSQL

conn = connect(Postgres, "localhost", "username", "password", "dbname", 5432)

stmt = prepare(conn, "SELECT 1::bigint, 2.0::double precision, 'foo'::character varying, " *
                     "'foo'::character(10);")
result = execute(stmt)
for row in result
    # code
end

finish(stmt)

disconnect(conn)

Block Syntax

using DBI
using PostgreSQL

connect(Postgres, "localhost", "username", "password", "dbname", 5432) do conn
    #code
end

Requirements

• DBI.jl
• DataFrames.jl >= v0.5.7
• DataArrays.jl >= v0.1.2
• libpq shared library (comes with a standard PostgreSQL client installation)
• Julia 0.4

Tests require a local PostgreSQL server with a postgres user/database (installed by default with PostgreSQL server installations) with trusted authentication from localhost.

Systems

• Tested on Funtoo Linux and Windows 8
• Should work on other systems provided libpq is avaiable (please file an issue if this is not the case)

TODO (soon)

• Implement more default PostgreSQL type handling
• Test type handling overrides
• More comprehensive error handling and tests
• Support for COPY

TODO (not soon)

• Asynchronous connection support
• Asynchronous Julia for handling asynchronous connections
• Testing and compatibility with multiple versions of PostgreSQL and libpq