summaryrefslogtreecommitdiffstats
path: root/doc/src/sgml/html/catalog-pg-proc.html
diff options
context:
space:
mode:
Diffstat (limited to 'doc/src/sgml/html/catalog-pg-proc.html')
-rw-r--r--doc/src/sgml/html/catalog-pg-proc.html256
1 files changed, 256 insertions, 0 deletions
diff --git a/doc/src/sgml/html/catalog-pg-proc.html b/doc/src/sgml/html/catalog-pg-proc.html
new file mode 100644
index 0000000..9c29fc4
--- /dev/null
+++ b/doc/src/sgml/html/catalog-pg-proc.html
@@ -0,0 +1,256 @@
+<?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>53.39. pg_proc</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-policy.html" title="53.38. pg_policy" /><link rel="next" href="catalog-pg-publication.html" title="53.40. pg_publication" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">53.39. <code class="structname">pg_proc</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-policy.html" title="53.38. pg_policy">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-publication.html" title="53.40. pg_publication">Next</a></td></tr></table><hr /></div><div class="sect1" id="CATALOG-PG-PROC"><div class="titlepage"><div><div><h2 class="title" style="clear: both">53.39. <code class="structname">pg_proc</code></h2></div></div></div><a id="id-1.10.4.41.2" class="indexterm"></a><p>
+ The catalog <code class="structname">pg_proc</code> stores information about
+ functions, procedures, aggregate functions, and window functions
+ (collectively also known as routines). See <a class="xref" href="sql-createfunction.html" title="CREATE FUNCTION"><span class="refentrytitle">CREATE FUNCTION</span></a>, <a class="xref" href="sql-createprocedure.html" title="CREATE PROCEDURE"><span class="refentrytitle">CREATE PROCEDURE</span></a>, and
+ <a class="xref" href="xfunc.html" title="38.3. User-Defined Functions">Section 38.3</a> for more information.
+ </p><p>
+ If <code class="structfield">prokind</code> indicates that the entry is for an
+ aggregate function, there should be a matching row in
+ <a class="link" href="catalog-pg-aggregate.html" title="53.2. pg_aggregate"><code class="structfield">pg_aggregate</code></a>.
+ </p><div class="table" id="id-1.10.4.41.5"><p class="title"><strong>Table 53.39. <code class="structname">pg_proc</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_proc 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">proname</code> <code class="type">name</code>
+ </p>
+ <p>
+ Name of the function
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">pronamespace</code> <code class="type">oid</code>
+ (references <a class="link" href="catalog-pg-namespace.html" title="53.32. pg_namespace"><code class="structname">pg_namespace</code></a>.<code class="structfield">oid</code>)
+ </p>
+ <p>
+ The OID of the namespace that contains this function
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proowner</code> <code class="type">oid</code>
+ (references <a class="link" href="catalog-pg-authid.html" title="53.8. pg_authid"><code class="structname">pg_authid</code></a>.<code class="structfield">oid</code>)
+ </p>
+ <p>
+ Owner of the function
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prolang</code> <code class="type">oid</code>
+ (references <a class="link" href="catalog-pg-language.html" title="53.29. pg_language"><code class="structname">pg_language</code></a>.<code class="structfield">oid</code>)
+ </p>
+ <p>
+ Implementation language or call interface of this function
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">procost</code> <code class="type">float4</code>
+ </p>
+ <p>
+ Estimated execution cost (in units of
+ <a class="xref" href="runtime-config-query.html#GUC-CPU-OPERATOR-COST">cpu_operator_cost</a>); if <code class="structfield">proretset</code>,
+ this is cost per row returned
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prorows</code> <code class="type">float4</code>
+ </p>
+ <p>
+ Estimated number of result rows (zero if not <code class="structfield">proretset</code>)
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">provariadic</code> <code class="type">oid</code>
+ (references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
+ </p>
+ <p>
+ Data type of the variadic array parameter's elements,
+ or zero if the function does not have a variadic parameter
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prosupport</code> <code class="type">regproc</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>
+ Planner support function for this function
+ (see <a class="xref" href="xfunc-optimization.html" title="38.11. Function Optimization Information">Section 38.11</a>), or zero if none
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prokind</code> <code class="type">char</code>
+ </p>
+ <p>
+ <code class="literal">f</code> for a normal function, <code class="literal">p</code>
+ for a procedure, <code class="literal">a</code> for an aggregate function, or
+ <code class="literal">w</code> for a window function
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prosecdef</code> <code class="type">bool</code>
+ </p>
+ <p>
+ Function is a security definer (i.e., a <span class="quote">“<span class="quote">setuid</span>”</span>
+ function)
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proleakproof</code> <code class="type">bool</code>
+ </p>
+ <p>
+ The function has no side effects. No information about the
+ arguments is conveyed except via the return value. Any function
+ that might throw an error depending on the values of its arguments
+ is not leak-proof.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proisstrict</code> <code class="type">bool</code>
+ </p>
+ <p>
+ Function returns null if any call argument is null. In that
+ case the function won't actually be called at all. Functions
+ that are not <span class="quote">“<span class="quote">strict</span>”</span> must be prepared to handle
+ null inputs.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proretset</code> <code class="type">bool</code>
+ </p>
+ <p>
+ Function returns a set (i.e., multiple values of the specified
+ data type)
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">provolatile</code> <code class="type">char</code>
+ </p>
+ <p>
+ <code class="structfield">provolatile</code> tells whether the function's
+ result depends only on its input arguments, or is affected by outside
+ factors.
+ It is <code class="literal">i</code> for <span class="quote">“<span class="quote">immutable</span>”</span> functions,
+ which always deliver the same result for the same inputs.
+ It is <code class="literal">s</code> for <span class="quote">“<span class="quote">stable</span>”</span> functions,
+ whose results (for fixed inputs) do not change within a scan.
+ It is <code class="literal">v</code> for <span class="quote">“<span class="quote">volatile</span>”</span> functions,
+ whose results might change at any time. (Use <code class="literal">v</code> also
+ for functions with side-effects, so that calls to them cannot get
+ optimized away.)
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proparallel</code> <code class="type">char</code>
+ </p>
+ <p>
+ <code class="structfield">proparallel</code> tells whether the function
+ can be safely run in parallel mode.
+ It is <code class="literal">s</code> for functions which are safe to run in
+ parallel mode without restriction.
+ It is <code class="literal">r</code> for functions which can be run in parallel
+ mode, but their execution is restricted to the parallel group leader;
+ parallel worker processes cannot invoke these functions.
+ It is <code class="literal">u</code> for functions which are unsafe in parallel
+ mode; the presence of such a function forces a serial execution plan.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">pronargs</code> <code class="type">int2</code>
+ </p>
+ <p>
+ Number of input arguments
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">pronargdefaults</code> <code class="type">int2</code>
+ </p>
+ <p>
+ Number of arguments that have defaults
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prorettype</code> <code class="type">oid</code>
+ (references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
+ </p>
+ <p>
+ Data type of the return value
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proargtypes</code> <code class="type">oidvector</code>
+ (references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
+ </p>
+ <p>
+ An array of the data types of the function arguments. This includes
+ only input arguments (including <code class="literal">INOUT</code> and
+ <code class="literal">VARIADIC</code> arguments), and thus represents
+ the call signature of the function.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proallargtypes</code> <code class="type">oid[]</code>
+ (references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
+ </p>
+ <p>
+ An array of the data types of the function arguments. This includes
+ all arguments (including <code class="literal">OUT</code> and
+ <code class="literal">INOUT</code> arguments); however, if all the
+ arguments are <code class="literal">IN</code> arguments, this field will be null.
+ Note that subscripting is 1-based, whereas for historical reasons
+ <code class="structfield">proargtypes</code> is subscripted from 0.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proargmodes</code> <code class="type">char[]</code>
+ </p>
+ <p>
+ An array of the modes of the function arguments, encoded as
+ <code class="literal">i</code> for <code class="literal">IN</code> arguments,
+ <code class="literal">o</code> for <code class="literal">OUT</code> arguments,
+ <code class="literal">b</code> for <code class="literal">INOUT</code> arguments,
+ <code class="literal">v</code> for <code class="literal">VARIADIC</code> arguments,
+ <code class="literal">t</code> for <code class="literal">TABLE</code> arguments.
+ If all the arguments are <code class="literal">IN</code> arguments,
+ this field will be null.
+ Note that subscripts correspond to positions of
+ <code class="structfield">proallargtypes</code> not <code class="structfield">proargtypes</code>.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proargnames</code> <code class="type">text[]</code>
+ </p>
+ <p>
+ An array of the names of the function arguments.
+ Arguments without a name are set to empty strings in the array.
+ If none of the arguments have a name, this field will be null.
+ Note that subscripts correspond to positions of
+ <code class="structfield">proallargtypes</code> not <code class="structfield">proargtypes</code>.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proargdefaults</code> <code class="type">pg_node_tree</code>
+ </p>
+ <p>
+ Expression trees (in <code class="function">nodeToString()</code> representation)
+ for default values. This is a list with
+ <code class="structfield">pronargdefaults</code> elements, corresponding to the last
+ <em class="replaceable"><code>N</code></em> <span class="emphasis"><em>input</em></span> arguments (i.e., the last
+ <em class="replaceable"><code>N</code></em> <code class="structfield">proargtypes</code> positions).
+ If none of the arguments have defaults, this field will be null.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">protrftypes</code> <code class="type">oid[]</code>
+ (references <a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a>.<code class="structfield">oid</code>)
+ </p>
+ <p>
+ An array of the argument/result data type(s) for which to apply
+ transforms (from the function's <code class="literal">TRANSFORM</code>
+ clause). Null if none.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prosrc</code> <code class="type">text</code>
+ </p>
+ <p>
+ This tells the function handler how to invoke the function. It
+ might be the actual source code of the function for interpreted
+ languages, a link symbol, a file name, or just about anything
+ else, depending on the implementation language/call convention.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">probin</code> <code class="type">text</code>
+ </p>
+ <p>
+ Additional information about how to invoke the function.
+ Again, the interpretation is language-specific.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">prosqlbody</code> <code class="type">pg_node_tree</code>
+ </p>
+ <p>
+ Pre-parsed SQL function body. This is used for SQL-language
+ functions when the body is given in SQL-standard notation
+ rather than as a string literal. It's null in other cases.
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proconfig</code> <code class="type">text[]</code>
+ </p>
+ <p>
+ Function's local settings for run-time configuration variables
+ </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition">
+ <code class="structfield">proacl</code> <code class="type">aclitem[]</code>
+ </p>
+ <p>
+ Access privileges; see <a class="xref" href="ddl-priv.html" title="5.7. Privileges">Section 5.7</a> for details
+ </p></td></tr></tbody></table></div></div><br class="table-break" /><p>
+ For compiled functions, both built-in and dynamically loaded,
+ <code class="structfield">prosrc</code> contains the function's C-language
+ name (link symbol).
+ For SQL-language functions, <code class="structfield">prosrc</code> contains
+ the function's source text if that is specified as a string literal;
+ but if the function body is specified in SQL-standard style,
+ <code class="structfield">prosrc</code> is unused (typically it's an empty
+ string) and <code class="structfield">prosqlbody</code> contains the
+ pre-parsed definition.
+ For all other currently-known language types,
+ <code class="structfield">prosrc</code> contains the function's source
+ text. <code class="structfield">probin</code> is null except for
+ dynamically-loaded C functions, for which it gives the name of the
+ shared library file containing the function.
+ </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-policy.html" title="53.38. pg_policy">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-publication.html" title="53.40. pg_publication">Next</a></td></tr><tr><td width="40%" align="left" valign="top">53.38. <code class="structname">pg_policy</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 53.40. <code class="structname">pg_publication</code></td></tr></table></div></body></html> \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-07 17:22:37 +0000