This is a fork of Edward Raff's LZJD. The added feature is a plugin for Postgres to allow similarity matching in SQL queries.

Requirements:

• GCC
• CMake
• Boost libraries
• Postgres requirements:
  • Server development package, looks like postgresql-server-dev-12.

Compile instructions:

• Check out the code
• cd src
• mkdir build
• cmake ..
• make

This creates:

• liblzjd.shared.so: Shared library for linking against.
• liblzjd.static.a: Static library for building against.
• lzjd: Command line application.
• If the Postgres server development package was installed, you should also have:
  • lzjd_psql.so: Postgresl plugin

Installation instructions:

• Copy lzjd to /usr/local/bin/ or similar, if desired.
• Copy liblzjd.shared.so to /usr/local/lib/liblzjd.so, or similar, if desired. Note the file name change.
• Copy liblzjd.static.a to /usr/local/lib/liblzjd.a, or similar, if desired. Note the file name change here too.
• For the Postgres plugin:
  • Run the command pg_config --pkglibdir, this is the installation directory.
  • Copy lzjd_psql.so to the directory shown in the above command. Should be /usr/lib/postgresql/XX/lib/ where XX is the version number.
  • As the administrative user for your Postgres environment, run this SQL command to load the plugin: CREATE OR REPLACE FUNCTION lzjd_compare(TEXT, TEXT) RETURNS INTEGER AS 'lzjd_psql.so', 'pg_lzjd_compare' LANGUAGE 'c';. No restart required, the new function lzjd_compare() is available.