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2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>35.55. transforms</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="infoschema-tables.html" title="35.54. tables" /><link rel="next" href="infoschema-triggered-update-columns.html" title="35.56. triggered_update_columns" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">35.55. <code class="literal">transforms</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="infoschema-tables.html" title="35.54. tables">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="information-schema.html" title="Chapter 35. The Information Schema">Up</a></td><th width="60%" align="center">Chapter 35. The Information Schema</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="infoschema-triggered-update-columns.html" title="35.56. triggered_update_columns">Next</a></td></tr></table><hr /></div><div class="sect1" id="INFOSCHEMA-TRANSFORMS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">35.55. <code class="literal">transforms</code> <a href="#INFOSCHEMA-TRANSFORMS" class="id_link">#</a></h2></div></div></div><p>
3    The view <code class="literal">transforms</code> contains information about the
4    transforms defined in the current database.  More precisely, it contains a
5    row for each function contained in a transform (the <span class="quote">“<span class="quote">from SQL</span>”</span>
6    or <span class="quote">“<span class="quote">to SQL</span>”</span> function).
7   </p><div class="table" id="id-1.7.6.59.3"><p class="title"><strong>Table 35.53. <code class="structname">transforms</code> Columns</strong></p><div class="table-contents"><table class="table" summary="transforms Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
8        Column Type
9       </p>
10       <p>
11        Description
12       </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
13        <code class="structfield">udt_catalog</code> <code class="type">sql_identifier</code>
14       </p>
15       <p>
16        Name of the database that contains the type the transform is for (always the current database)
17       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
18        <code class="structfield">udt_schema</code> <code class="type">sql_identifier</code>
19       </p>
20       <p>
21        Name of the schema that contains the type the transform is for
22       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
23        <code class="structfield">udt_name</code> <code class="type">sql_identifier</code>
24       </p>
25       <p>
26        Name of the type the transform is for
27       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
28        <code class="structfield">specific_catalog</code> <code class="type">sql_identifier</code>
29       </p>
30       <p>
31        Name of the database containing the function (always the current database)
32       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
33        <code class="structfield">specific_schema</code> <code class="type">sql_identifier</code>
34       </p>
35       <p>
36        Name of the schema containing the function
37       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
38        <code class="structfield">specific_name</code> <code class="type">sql_identifier</code>
39       </p>
40       <p>
41        The <span class="quote">“<span class="quote">specific name</span>”</span> of the function.  See <a class="xref" href="infoschema-routines.html" title="35.45. routines">Section 35.45</a> for more information.
42       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
43        <code class="structfield">group_name</code> <code class="type">sql_identifier</code>
44       </p>
45       <p>
46        The SQL standard allows defining transforms in <span class="quote">“<span class="quote">groups</span>”</span>,
47        and selecting a group at run time.  PostgreSQL does not support this.
48        Instead, transforms are specific to a language.  As a compromise, this
49        field contains the language the transform is for.
50       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
51        <code class="structfield">transform_type</code> <code class="type">character_data</code>
52       </p>
53       <p>
54        <code class="literal">FROM SQL</code> or <code class="literal">TO SQL</code>
55       </p></td></tr></tbody></table></div></div><br class="table-break" /></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="infoschema-tables.html" title="35.54. tables">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="information-schema.html" title="Chapter 35. The Information Schema">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="infoschema-triggered-update-columns.html" title="35.56. triggered_update_columns">Next</a></td></tr><tr><td width="40%" align="left" valign="top">35.54. <code class="literal">tables</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 35.56. <code class="literal">triggered_update_columns</code></td></tr></table></div></body></html>