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PL/Ruby procedural language for the PostgreSQL database system by Guy Decoux
C Ruby Shell
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PL/Ruby is a loadable procedural language for the Postgres database system that enable the Ruby language to create functions and trigger procedures * Prerequisite ruby >= 1.4.4 source of postgresql (for some include files). For PostgreSQL 7.2 the source is not required if all headers was installed. Command (see INSTALL in the directory postgresql-7.2) make install-all-headers * Installation ruby extconf.rb make make install You may need to specify : --with-pgsql-dir=<prefix for include and lib directories for PostgreSQL> --with-pgsql-include=<include file directory for PostgreSQL> --with-pgsql-lib=<library dir for PostgreSQL> --with-pgsql-srcinc=<include file *from* the source of PostgreSQL> pgsql-srcinc must contains, for example, the file catalog/pg_proc.h (not needed if `make install-all-headers' was executed) --with-pgsql-version=<release number for PostgreSQL, actually 65, 70, 71 or 72 i.e. major and minor number> --enable-conversion arguments for the function will be converted to Integer, Float, true, false, Time, Tinterval or String depending of the internal type. --enable-geometry add the classes Point, Segment, Box, Path, Polygon, Circle to plruby (--enable-conversion is automatically added) --enable-network add the classes NetAddr, MacAddr to plruby (--enable-conversion is automatically added) --enable-bitstring add the class BitString to plruby (--enable-conversion is automatically added) --enable-all-conversions enable all conversions (...) --enable-autoload ruby will use autoload for the classes Point, Segment, Box, Path, Polygon, Circle, NetAddr, MacAddr, BitString even when it's compiled with $SAFE >= 4 **WARNING** work only with ruby >= 1.8.1 --with_suffix=<suffix to add> For example ruby extconf.rb --enable_geometry --with-suffix=_geo will create plruby_geo.so Example : ruby extconf.rb --with-pgsql-include=/usr/include/postgresql \ --with-pgsql-lib=/usr/lib \ --with-pgsql-srcinc=/var/postgres/postgresl-6.5/src/include * Test (and examples) WARNING : if plruby was compiled with --enable-conversion and $SAFE < 3 you must *FIRST* run `make install' before `make test' make test this will run the 2 commands : ( cd test/plt; ./runtest ) ( cd test/plp; ./runtest ) The database plruby_test is created and then destroyed. Don't use it if such a database exist on your system. * Now create the PL/Ruby language in PostgreSQL Since the pg_language system catalog is private to each database, the new language can be created only for individual databases, or in the template1 database. In the latter case, it is automatically available in all newly created databases. The commands to create the new language are: create function plruby_call_handler () returns opaque as 'path-to-plruby-shared-lib' language 'C'; create trusted procedural language 'plruby' handler plruby_call_handler lancompiler 'PL/Ruby'; *** WARNING for PostgreSQL > 7.0.2 *** for the new interface to fmgr, the language must be specified as 'newC' rather than 'C' *** WARNING for PostgreSQL >= 7.1.rc4 *** the language must be specified as 'C' rather than 'newC' The trusted keyword on create procedural language tells PostgreSQL, that all users (not only those with superuser privilege) are permitted to create functions with LANGUAGE 'plruby'. This is absolutely safe, because there is nothing a normal user can do with PL/Ruby, to get around access restrictions he/she has. * Documentation : see plruby.rd and plruby.html * Copying This extension module is copyrighted free software by Guy Decoux You can redistribute it and/or modify it under the same term as Ruby. Guy Decoux <firstname.lastname@example.org>