127 lines
7.9 KiB
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127 lines
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<title>SQLNumResultCols</title>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">SQLNumResultCols - Get number of result columns</h1>
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<div><div class="section"></div>
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<div class="section"><h4 class="sectiontitle">Purpose</h4> <p><samp class="codeph">SQLNumResultCols()</samp> returns
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the number of columns in the result set associated with the input statement
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handle.</p>
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<p><samp class="codeph">SQLPrepare()</samp> or <samp class="codeph">SQLExecDirect()</samp> must
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be called before calling this function.</p>
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<p>After calling this function,
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you can call <samp class="codeph">SQLDescribeCol()</samp>, <samp class="codeph">SQLColAttributes()</samp>, <samp class="codeph">SQLBindCol()</samp> or <samp class="codeph">SQLGetData()</samp>.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Syntax</h4><pre>SQLRETURN SQLNumResultCols (SQLHSTMT hstmt,
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SQLSMALLINT *pccol);</pre>
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</div>
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<div class="section"><h4 class="sectiontitle">Function arguments</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="hsides" border="1" rules="all"><caption>Table 1. SQLNumResultCols arguments</caption><thead align="left"><tr><th align="left" valign="top" width="26.95167286245353%" id="d0e74">Data type</th>
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<th align="left" valign="top" width="18.21561338289963%" id="d0e76">Argument</th>
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<th align="left" valign="top" width="16.728624535315987%" id="d0e78">Use</th>
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<th align="left" valign="top" width="38.10408921933085%" id="d0e80">Description</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="26.95167286245353%" headers="d0e74 ">SQLHSTMT</td>
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<td align="left" valign="top" width="18.21561338289963%" headers="d0e76 "><em>hstmt</em></td>
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<td align="left" valign="top" width="16.728624535315987%" headers="d0e78 ">Input</td>
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<td align="left" valign="top" width="38.10408921933085%" headers="d0e80 ">Statement handle.</td>
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</tr>
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<tr><td align="left" valign="top" width="26.95167286245353%" headers="d0e74 ">SQLSMALLINT *</td>
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<td align="left" valign="top" width="18.21561338289963%" headers="d0e76 "><em>pccol</em></td>
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<td align="left" valign="top" width="16.728624535315987%" headers="d0e78 ">Output</td>
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<td align="left" valign="top" width="38.10408921933085%" headers="d0e80 ">Number of columns in the result set.</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section"><h4 class="sectiontitle">Usage</h4><p>The function sets the output argument to zero
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if the last statement processed on the input statement handle is not a SELECT.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">Return codes</h4><ul><li>SQL_SUCCESS</li>
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<li>SQL_ERROR</li>
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<li>SQL_INVALID_HANDLE</li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">Diagnostics</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="hsides" border="1" rules="rows"><caption>Table 2. SQLNumResultCols SQLSTATEs</caption><thead align="left"><tr><th align="left" valign="top" width="25%" id="d0e133">SQLSTATE</th>
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<th align="left" valign="top" width="25%" id="d0e135">Description</th>
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<th align="left" valign="top" width="50%" id="d0e137">Explanation</th>
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</tr>
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</thead>
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<tbody><tr><td align="left" valign="top" width="25%" headers="d0e133 "><strong>40</strong>003 <strong>*</strong></td>
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<td align="left" valign="top" width="25%" headers="d0e135 ">Statement completion unknown</td>
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<td align="left" valign="top" width="50%" headers="d0e137 ">The communication link between the CLI and
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the data source fails before the function completes processing.</td>
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</tr>
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<tr><td align="left" valign="top" width="25%" headers="d0e133 "><strong>58</strong>004</td>
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<td align="left" valign="top" width="25%" headers="d0e135 ">System error</td>
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<td align="left" valign="top" width="50%" headers="d0e137 ">Unrecoverable system error.</td>
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</tr>
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<tr><td align="left" valign="top" width="25%" headers="d0e133 "><strong>HY</strong>001</td>
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<td align="left" valign="top" width="25%" headers="d0e135 ">Memory allocation failure</td>
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<td align="left" valign="top" width="50%" headers="d0e137 ">The driver is unable to allocate memory required
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to support the processing or completion of the function.</td>
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</tr>
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<tr><td align="left" valign="top" width="25%" headers="d0e133 "><strong>HY</strong>009</td>
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<td align="left" valign="top" width="25%" headers="d0e135 ">Argument value that is not valid</td>
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<td align="left" valign="top" width="50%" headers="d0e137 "><em>pcbCol</em> is a null pointer.</td>
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</tr>
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<tr><td align="left" valign="top" width="25%" headers="d0e133 "><strong>HY</strong>010</td>
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<td align="left" valign="top" width="25%" headers="d0e135 ">Function sequence error</td>
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<td align="left" valign="top" width="50%" headers="d0e137 ">The function is called before calling SQLPrepare
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or SQLExecDirect for the <em>hstmt</em>.</td>
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</tr>
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<tr><td align="left" valign="top" width="25%" headers="d0e133 "><strong>S1</strong>013 <strong>*</strong></td>
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<td align="left" valign="top" width="25%" headers="d0e135 ">Memory management problem.</td>
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<td align="left" valign="top" width="50%" headers="d0e137 ">The driver is unable to access memory required
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to support the processing or completion of the function.</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section"><h4 class="sectiontitle">References</h4><ul><li><a href="rzadpfnbindc.htm#rzadpfnbindc">SQLBindCol - Bind a column to an application variable</a></li>
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<li><a href="rzadpfncolat.htm#rzadpfncolat">SQLColAttributes - Obtain column attributes</a></li>
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<li><a href="rzadpfndecol.htm#rzadpfndecol">SQLDescribeCol - Describe column attributes</a></li>
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<li><a href="rzadpfnexecd.htm#rzadpfnexecd">SQLExecDirect - Execute a statement directly</a></li>
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<li><a href="rzadpfngcol.htm#rzadpfngcol">SQLGetCol - Retrieve one column of a row of the result set</a></li>
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<li><a href="rzadpfnprep.htm#rzadpfnprep">SQLPrepare - Prepare a statement</a></li>
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</ul>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzadphdapi.htm" title="This topic provides a description of each CLI function.">DB2 UDB CLI functions</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzadpprocupd.htm">Process UPDATE, DELETE, and INSERT statements in a DB2 UDB CLI application</a></div>
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</div>
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</div>
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