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| title: pg_pltemplate |
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| The `pg_pltemplate` system catalog table stores template information for procedural languages. A template for a language allows the language to be created in a particular database by a simple `CREATE LANGUAGE` command, with no need to specify implementation details. Unlike most system catalogs, `pg_pltemplate` is shared across all databases of HAWQ system: there is only one copy of `pg_pltemplate` per system, not one per database. This allows the information to be accessible in each database as it is needed. |
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| There are not currently any commands that manipulate procedural language templates; to change the built-in information, a superuser must modify the table using ordinary `INSERT`, `DELETE`, or `UPDATE` commands. |
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| <a id="topic1__hf150092"></a> |
| <span class="tablecap">Table 1. pg\_catalog.pg\_pltemplate</span> |
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| | column | type | references | description | |
| |------------------|-------------|------------|-------------------------------------------------------| |
| | `tmplname` | name | | Name of the language this template is for | |
| | `tmpltrusted` | boolean | | True if language is considered trusted | |
| | `tmplhandler` | text | | Name of call handler function | |
| | `tmplvalidator ` | text | | Name of validator function, or `NULL` if none | |
| | `tmpllibrary` | text | | Path of shared library that implements language | |
| | `tmplacl` | aclitem\[\] | | Access privileges for template (not yet implemented). | |
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