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diff --git a/doc/src/sgml/html/catalog-pg-trigger.html b/doc/src/sgml/html/catalog-pg-trigger.html new file mode 100644 index 0000000..da92ff0 --- /dev/null +++ b/doc/src/sgml/html/catalog-pg-trigger.html @@ -0,0 +1,148 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!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>53.58. pg_trigger</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="catalog-pg-transform.html" title="53.57. pg_transform" /><link rel="next" href="catalog-pg-ts-config.html" title="53.59. pg_ts_config" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">53.58. <code class="structname">pg_trigger</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-transform.html" title="53.57. pg_transform">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 53. System Catalogs</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="catalog-pg-ts-config.html" title="53.59. pg_ts_config">Next</a></td></tr></table><hr /></div><div class="sect1" id="CATALOG-PG-TRIGGER"><div class="titlepage"><div><div><h2 class="title" style="clear: both">53.58. <code class="structname">pg_trigger</code></h2></div></div></div><a id="id-1.10.4.60.2" class="indexterm"></a><p> + The catalog <code class="structname">pg_trigger</code> stores triggers on tables + and views. + See <a class="xref" href="sql-createtrigger.html" title="CREATE TRIGGER"><span class="refentrytitle">CREATE TRIGGER</span></a> + for more information. + </p><div class="table" id="id-1.10.4.60.4"><p class="title"><strong>Table 53.58. <code class="structname">pg_trigger</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_trigger Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition"> + Column Type + </p> + <p> + Description + </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">oid</code> <code class="type">oid</code> + </p> + <p> + Row identifier + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgrelid</code> <code class="type">oid</code> + (references <a class="link" href="catalog-pg-class.html" title="53.11. pg_class"><code class="structname">pg_class</code></a>.<code class="structfield">oid</code>) + </p> + <p> + The table this trigger is on + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgparentid</code> <code class="type">oid</code> + (references <a class="link" href="catalog-pg-trigger.html" title="53.58. pg_trigger"><code class="structname">pg_trigger</code></a>.<code class="structfield">oid</code>) + </p> + <p> + Parent trigger that this trigger is cloned from (this happens when + partitions are created or attached to a partitioned table); + zero if not a clone + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgname</code> <code class="type">name</code> + </p> + <p> + Trigger name (must be unique among triggers of same table) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgfoid</code> <code class="type">oid</code> + (references <a class="link" href="catalog-pg-proc.html" title="53.39. pg_proc"><code class="structname">pg_proc</code></a>.<code class="structfield">oid</code>) + </p> + <p> + The function to be called + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgtype</code> <code class="type">int2</code> + </p> + <p> + Bit mask identifying trigger firing conditions + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgenabled</code> <code class="type">char</code> + </p> + <p> + Controls in which <a class="xref" href="runtime-config-client.html#GUC-SESSION-REPLICATION-ROLE">session_replication_role</a> modes + the trigger fires. + <code class="literal">O</code> = trigger fires in <span class="quote">“<span class="quote">origin</span>”</span> and <span class="quote">“<span class="quote">local</span>”</span> modes, + <code class="literal">D</code> = trigger is disabled, + <code class="literal">R</code> = trigger fires in <span class="quote">“<span class="quote">replica</span>”</span> mode, + <code class="literal">A</code> = trigger fires always. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgisinternal</code> <code class="type">bool</code> + </p> + <p> + True if trigger is internally generated (usually, to enforce + the constraint identified by <code class="structfield">tgconstraint</code>) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgconstrrelid</code> <code class="type">oid</code> + (references <a class="link" href="catalog-pg-class.html" title="53.11. pg_class"><code class="structname">pg_class</code></a>.<code class="structfield">oid</code>) + </p> + <p> + The table referenced by a referential integrity constraint + (zero if trigger is not for a referential integrity constraint) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgconstrindid</code> <code class="type">oid</code> + (references <a class="link" href="catalog-pg-class.html" title="53.11. pg_class"><code class="structname">pg_class</code></a>.<code class="structfield">oid</code>) + </p> + <p> + The index supporting a unique, primary key, referential integrity, + or exclusion constraint + (zero if trigger is not for one of these types of constraint) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgconstraint</code> <code class="type">oid</code> + (references <a class="link" href="catalog-pg-constraint.html" title="53.13. pg_constraint"><code class="structname">pg_constraint</code></a>.<code class="structfield">oid</code>) + </p> + <p> + The <a class="link" href="catalog-pg-constraint.html" title="53.13. pg_constraint"><code class="structname">pg_constraint</code></a> entry associated with the trigger + (zero if trigger is not for a constraint) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgdeferrable</code> <code class="type">bool</code> + </p> + <p> + True if constraint trigger is deferrable + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tginitdeferred</code> <code class="type">bool</code> + </p> + <p> + True if constraint trigger is initially deferred + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgnargs</code> <code class="type">int2</code> + </p> + <p> + Number of argument strings passed to trigger function + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgattr</code> <code class="type">int2vector</code> + (references <a class="link" href="catalog-pg-attribute.html" title="53.7. pg_attribute"><code class="structname">pg_attribute</code></a>.<code class="structfield">attnum</code>) + </p> + <p> + Column numbers, if trigger is column-specific; otherwise an + empty array + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgargs</code> <code class="type">bytea</code> + </p> + <p> + Argument strings to pass to trigger, each NULL-terminated + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgqual</code> <code class="type">pg_node_tree</code> + </p> + <p> + Expression tree (in <code class="function">nodeToString()</code> + representation) for the trigger's <code class="literal">WHEN</code> condition, or null + if none + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgoldtable</code> <code class="type">name</code> + </p> + <p> + <code class="literal">REFERENCING</code> clause name for <code class="literal">OLD TABLE</code>, + or null if none + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">tgnewtable</code> <code class="type">name</code> + </p> + <p> + <code class="literal">REFERENCING</code> clause name for <code class="literal">NEW TABLE</code>, + or null if none + </p></td></tr></tbody></table></div></div><br class="table-break" /><p> + Currently, column-specific triggering is supported only for + <code class="literal">UPDATE</code> events, and so <code class="structfield">tgattr</code> is relevant + only for that event type. <code class="structfield">tgtype</code> might + contain bits for other event types as well, but those are presumed + to be table-wide regardless of what is in <code class="structfield">tgattr</code>. + </p><div class="note"><h3 class="title">Note</h3><p> + When <code class="structfield">tgconstraint</code> is nonzero, + <code class="structfield">tgconstrrelid</code>, <code class="structfield">tgconstrindid</code>, + <code class="structfield">tgdeferrable</code>, and <code class="structfield">tginitdeferred</code> are + largely redundant with the referenced <a class="link" href="catalog-pg-constraint.html" title="53.13. pg_constraint"><code class="structname">pg_constraint</code></a> entry. + However, it is possible for a non-deferrable trigger to be associated + with a deferrable constraint: foreign key constraints can have some + deferrable and some non-deferrable triggers. + </p></div><div class="note"><h3 class="title">Note</h3><p> + <code class="literal">pg_class.relhastriggers</code> + must be true if a relation has any triggers in this catalog. + </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-transform.html" title="53.57. pg_transform">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 53. 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