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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>VIEW-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-views.html" title="LIST-VIEWS" /><link rel="next" href="create-index.html" title="CREATE-INDEX" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">VIEW-EXISTS-P</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="list-views.html">Prev</a> </td><th width="60%" align="center">Functional Data Definition Language (FDDL)</th><td width="20%" align="right"> <a accesskey="n" href="create-index.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="view-exists-p"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>VIEW-EXISTS-P — Tests for the existence of a database view.<strong>Function</strong></p></div><div class="refsect1"><a id="idp74493024"></a><h2>Syntax</h2><pre class="synopsis">
      <code class="function">view-exists-p</code> <em class="replaceable"><code>name</code></em> &amp;key <em class="replaceable"><code>owner</code></em> <em class="replaceable"><code>database</code></em> =&gt; <span class="returnvalue">result</span></pre></div><div class="refsect1"><a id="idp74496992"></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 view 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="idp75067312"></a><h2>Description</h2><p>Tests for the existence of an SQL view 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 views owned by users are examined. If
      <em class="parameter"><code>owner</code></em> is a string denoting a user name,
      only views 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 views are examined.
      </p></div><div class="refsect1"><a id="idp75073360"></a><h2>Examples</h2><pre class="screen">
(view-exists-p [lenins-group])
=&gt; T
      </pre></div><div class="refsect1"><a id="idp75074752"></a><h2>Side Effects</h2><p>
        None. 
      </p></div><div class="refsect1"><a id="idp75075904"></a><h2>Affected by</h2><p>
        <span class="symbol">*default-database*</span>
      </p></div><div class="refsect1"><a id="idp75077440"></a><h2>Exceptional Situations</h2><p>
        None. 
      </p></div><div class="refsect1"><a id="idp75078592"></a><h2>See Also</h2><table border="0" summary="Simple list" class="simplelist"><tr><td><a class="link" href="create-view.html" title="CREATE-VIEW"><code class="function">create-view</code></a></td></tr><tr><td><a class="link" href="drop-view.html" title="DROP-VIEW"><code class="function">drop-view</code></a></td></tr><tr><td><a class="link" href="list-views.html" title="LIST-VIEWS"><code class="function">list-views</code></a></td></tr></table></div><div class="refsect1"><a id="idp75083344"></a><h2>Notes</h2><p>
        <code class="function">view-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-views.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="create-index.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">LIST-VIEWS </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> CREATE-INDEX</td></tr></table></div></body></html>

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