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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>53.16. pg_prepared_statements</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="view-pg-policies.html" title="53.15. pg_policies" /><link rel="next" href="view-pg-prepared-xacts.html" title="53.17. pg_prepared_xacts" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">53.16. <code class="structname">pg_prepared_statements</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="view-pg-policies.html" title="53.15. pg_policies">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="views.html" title="Chapter 53. System Views">Up</a></td><th width="60%" align="center">Chapter 53. System Views</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="view-pg-prepared-xacts.html" title="53.17. pg_prepared_xacts">Next</a></td></tr></table><hr /></div><div class="sect1" id="VIEW-PG-PREPARED-STATEMENTS"><div class="titlepage"><div><div><h2 class="title" style="clear: both">53.16. <code class="structname">pg_prepared_statements</code> <a href="#VIEW-PG-PREPARED-STATEMENTS" class="id_link">#</a></h2></div></div></div><a id="id-1.10.5.20.2" class="indexterm"></a><p>
   3    The <code class="structname">pg_prepared_statements</code> view displays
   4    all the prepared statements that are available in the current
   5    session. See <a class="xref" href="sql-prepare.html" title="PREPARE"><span class="refentrytitle">PREPARE</span></a> for more information about prepared
   6    statements.
   7   </p><p>
   8    <code class="structname">pg_prepared_statements</code> contains one row
   9    for each prepared statement. Rows are added to the view when a new
  10    prepared statement is created and removed when a prepared statement
  11    is released (for example, via the <a class="link" href="sql-deallocate.html" title="DEALLOCATE"><code class="command">DEALLOCATE</code></a> command).
  12   </p><div class="table" id="id-1.10.5.20.5"><p class="title"><strong>Table 53.16. <code class="structname">pg_prepared_statements</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_prepared_statements Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition">
  13        Column Type
  14       </p>
  15       <p>
  16        Description
  17       </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition">
  18        <code class="structfield">name</code> <code class="type">text</code>
  19       </p>
  20       <p>
  21        The identifier of the prepared statement
  22       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  23        <code class="structfield">statement</code> <code class="type">text</code>
  24       </p>
  25       <p>
  26        The query string submitted by the client to create this
  27        prepared statement. For prepared statements created via SQL,
  28        this is the <code class="command">PREPARE</code> statement submitted by
  29        the client. For prepared statements created via the
  30        frontend/backend protocol, this is the text of the prepared
  31        statement itself.
  32       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  33        <code class="structfield">prepare_time</code> <code class="type">timestamptz</code>
  34       </p>
  35       <p>
  36        The time at which the prepared statement was created
  37       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  38        <code class="structfield">parameter_types</code> <code class="type">regtype[]</code>
  39       </p>
  40       <p>
  41        The expected parameter types for the prepared statement in the
  42        form of an array of <code class="type">regtype</code>. The OID corresponding
  43        to an element of this array can be obtained by casting the
  44        <code class="type">regtype</code> value to <code class="type">oid</code>.
  45       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  46        <code class="structfield">result_types</code> <code class="type">regtype[]</code>
  47       </p>
  48       <p>
  49        The types of the columns returned by the prepared statement in the
  50        form of an array of <code class="type">regtype</code>. The OID corresponding
  51        to an element of this array can be obtained by casting the
  52        <code class="type">regtype</code> value to <code class="type">oid</code>.
  53        If the prepared statement does not provide a result (e.g., a DML
  54        statement), then this field will be null.
  55       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  56        <code class="structfield">from_sql</code> <code class="type">bool</code>
  57       </p>
  58       <p>
  59        <code class="literal">true</code> if the prepared statement was created
  60        via the <code class="command">PREPARE</code> SQL command;
  61        <code class="literal">false</code> if the statement was prepared via the
  62        frontend/backend protocol
  63       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  64        <code class="structfield">generic_plans</code> <code class="type">int8</code>
  65       </p>
  66       <p>
  67        Number of times generic plan was chosen
  68       </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
  69        <code class="structfield">custom_plans</code> <code class="type">int8</code>
  70       </p>
  71       <p>
  72        Number of times custom plan was chosen
  73       </p></td></tr></tbody></table></div></div><br class="table-break" /><p>
  74    The <code class="structname">pg_prepared_statements</code> view is read-only.
  75   </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="view-pg-policies.html" title="53.15. pg_policies">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="views.html" title="Chapter 53. System Views">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="view-pg-prepared-xacts.html" title="53.17. pg_prepared_xacts">Next</a></td></tr><tr><td width="40%" align="left" valign="top">53.15. <code class="structname">pg_policies</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"> 53.17. <code class="structname">pg_prepared_xacts</code></td></tr></table></div></body></html>