blob: ead1d66702c3db33273e131762226e3250800561 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
<?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>SPI_fnumber</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="spi-spi-fname.html" title="SPI_fname" /><link rel="next" href="spi-spi-getvalue.html" title="SPI_getvalue" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">SPI_fnumber</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="spi-spi-fname.html" title="SPI_fname">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="spi-interface-support.html" title="47.2. Interface Support Functions">Up</a></td><th width="60%" align="center">47.2. Interface Support Functions</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="spi-spi-getvalue.html" title="SPI_getvalue">Next</a></td></tr></table><hr /></div><div class="refentry" id="SPI-SPI-FNUMBER"><div class="titlepage"></div><a id="id-1.8.12.9.5.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">SPI_fnumber</span></h2><p>SPI_fnumber — determine the column number for the specified column name</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
int SPI_fnumber(TupleDesc <em class="parameter"><code>rowdesc</code></em>, const char * <em class="parameter"><code>colname</code></em>)
</pre></div><div class="refsect1" id="id-1.8.12.9.5.5"><h2>Description</h2><p>
<code class="function">SPI_fnumber</code> returns the column number for the
column with the specified name.
</p><p>
If <em class="parameter"><code>colname</code></em> refers to a system column (e.g.,
<code class="literal">ctid</code>) then the appropriate negative column number will
be returned. The caller should be careful to test the return value
for exact equality to <code class="symbol">SPI_ERROR_NOATTRIBUTE</code> to
detect an error; testing the result for less than or equal to 0 is
not correct unless system columns should be rejected.
</p></div><div class="refsect1" id="id-1.8.12.9.5.6"><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="literal">TupleDesc <em class="parameter"><code>rowdesc</code></em></code></span></dt><dd><p>
input row description
</p></dd><dt><span class="term"><code class="literal">const char * <em class="parameter"><code>colname</code></em></code></span></dt><dd><p>
column name
</p></dd></dl></div></div><div class="refsect1" id="id-1.8.12.9.5.7"><h2>Return Value</h2><p>
Column number (count starts at 1 for user-defined columns), or
<code class="symbol">SPI_ERROR_NOATTRIBUTE</code> if the named column was not
found.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="spi-spi-fname.html" title="SPI_fname">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="spi-interface-support.html" title="47.2. Interface Support Functions">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="spi-spi-getvalue.html" title="SPI_getvalue">Next</a></td></tr><tr><td width="40%" align="left" valign="top">SPI_fname </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> SPI_getvalue</td></tr></table></div></body></html>
|
