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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>9.�Query conversions</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="YAZ User's Guide and Reference"><link rel="up" href="zoom.html" title="Chapter�3.�ZOOM"><link rel="prev" href="zoom.options.html" title="8.�Options"><link rel="next" href="zoom.events.html" title="10.�Events"></head><body><link rel="stylesheet" type="text/css" href="common/style1.css"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">9.�Query conversions</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="zoom.options.html">Prev</a>�</td><th width="60%" align="center">Chapter�3.�ZOOM</th><td width="20%" align="right">�<a accesskey="n" href="zoom.events.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="zoom.queryconversions"></a>9.�Query conversions</h2></div></div></div><pre class="synopsis">
int ZOOM_query_cql2rpn(ZOOM_query s, const char *cql_str,
ZOOM_connection conn);
int ZOOM_query_ccl2rpn(ZOOM_query s, const char *ccl_str,
const char *config,
int *ccl_error, const char **error_string,
int *error_pos);
</pre><p>
<code class="function">ZOOM_query_cql2rpn</code> translates the CQL string,
client-side, into RPN which may be passed to the server.
This is useful for server's that don't themselves
support CQL, for which <code class="function">ZOOM_query_cql</code> is useless.
`conn' is used only as a place to stash diagnostics if compilation
fails; if this information is not needed, a null pointer may be used.
The CQL conversion is driven by option <code class="literal">cqlfile</code> from
connection conn. This specifies a conversion file (eg pqf.properties)
which <span class="emphasis"><em>must</em></span> be present.
</p><p>
<code class="function">ZOOM_query_ccl2rpn</code> translates the CCL string,
client-side, into RPN which may be passed to the server.
The conversion is driven by the specification given by
<code class="literal">config</code>. Upon completion 0 is returned on success; -1
is returned on on failure. Om failure <code class="literal">error_string</code> and
<code class="literal">error_pos</code> holds error message and position of
first error in original CCL string.
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