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PostgreSQL includes several procedural languages with the base distribution: PL/PgSQL , PL/Tcl , PL/Perl , and PL/Python .
In addition, there are a number of procedural languages that are developed and maintained outside the core PostgreSQL distribution. Table H-2 lists some of these packages. Note that some of these projects may not be released under the same license as PostgreSQL . For more information on each procedural language, including licensing information, refer to its website and documentation.
Table H-2. Externally Maintained Procedural Languages
| Name | Language | Website |
|---|---|---|
| PL/Java | Java | http://pljava.projects.postgresql.org/ |
| PL/PHP | PHP | http://www.commandprompt.com/community/plphp/ |
| PL/Py | Python | http://python.projects.postgresql.org/ |
| PL/R | R | http://www.joeconway.com/plr/ |
| PL/Ruby | Ruby | http://raa.ruby-lang.org/project/pl-ruby/ |
| PL/Scheme | Scheme | http://plscheme.projects.postgresql.org/ |
| PL/sh | Unix shell | http://plsh.projects.postgresql.org/ |