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<!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>INDEX-EXISTS-P</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="CLSQL Users' Guide" /><link rel="up" href="ref-fddl.html" title="Functional Data Definition Language (FDDL)" /><link rel="prev" href="list-indexes.html" title="LIST-INDEXES" /><link rel="next" href="attribute-type.html" title="ATTRIBUTE-TYPE" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">INDEX-EXISTS-P</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="list-indexes.html">Prev</a> </td><th width="60%" align="center">Functional Data Definition Language (FDDL)</th><td width="20%" align="right"> <a accesskey="n" href="attribute-type.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="index-exists-p"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>INDEX-EXISTS- — Tests for the existence of a database index.<strong>Function</strong></p></div><div class="refsect1"><a id="idp62992016"></a><h2>Syntax</h2><pre class="synopsis">
<code class="function">index-exists-p</code> <em class="replaceable"><code>name</code></em> &key <em class="replaceable"><code>owner</code></em> <em class="replaceable"><code>database</code></em> => <span class="returnvalue">result</span></pre></div><div class="refsect1"><a id="idp62995440"></a><h2>Arguments and Values</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>name</code></em></span></dt><dd><p>
The name of the index as a string, symbol or SQL expression.
</p></dd><dt><span class="term"><em class="parameter"><code>owner</code></em></span></dt><dd><p>
A string, <code class="constant">NIL</code> or <span class="symbol">:all</span>.
</p></dd><dt><span class="term"><em class="parameter"><code>database</code></em></span></dt><dd><p>
A database object which defaults to
<span class="symbol">*default-database*</span>.
</p></dd><dt><span class="term"><em class="parameter"><code>result</code></em></span></dt><dd><p>
A Boolean.
</p></dd></dl></div></div><div class="refsect1"><a id="idp63005552"></a><h2>Description</h2><p>Tests for the existence of an SQL index called
<em class="parameter"><code>name</code></em> in <em class="parameter"><code>database</code></em>
which defaults to
<span class="symbol">*default-database*</span>. <em class="parameter"><code>owner</code></em>
is <code class="constant">NIL</code> by default which means that only indexes owned by users
are examined. If <em class="parameter"><code>owner</code></em> is a string
denoting a user name, only indexes owned by
<em class="parameter"><code>owner</code></em> are examined. If
<em class="parameter"><code>owner</code></em> is <span class="symbol">:all</span> then all
indexes are examined.
</p></div><div class="refsect1"><a id="idp63011776"></a><h2>Examples</h2><pre class="screen">
(index-exists-p [bar])
=> T
</pre></div><div class="refsect1"><a id="idp63013168"></a><h2>Side Effects</h2><p>
None.
</p></div><div class="refsect1"><a id="idp63014320"></a><h2>Affected by</h2><p>
<span class="symbol">*default-database*</span>
</p></div><div class="refsect1"><a id="idp63015856"></a><h2>Exceptional Situations</h2><p>
None.
</p></div><div class="refsect1"><a id="idp63017008"></a><h2>See Also</h2><table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="create-index.html" title="CREATE-INDEX"><code class="function">create-index</code></a></td></tr><tr><td><a class="link" href="drop-index.html" title="DROP-INDEX"><code class="function">drop-index</code></a></td></tr><tr><td><a class="link" href="list-indexes.html" title="LIST-INDEXES"><code class="function">list-indexes</code></a></td></tr></table></div><div class="refsect1"><a id="idp63021760"></a><h2>Notes</h2><p>
<code class="function">index-exists-p</code> is a <span class="application"><span class="emphasis"><em>CLSQL</em></span></span> extension.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="list-indexes.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ref-fddl.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="attribute-type.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">LIST-INDEXES </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> ATTRIBUTE-TYPE</td></tr></table></div></body></html>
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