ibm-information-center/dist/eclipse/plugins/i5OS.ic.apis_5.4.0.1/QsnRtvFldInf.htm

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<title>Retrieve Field Information (QsnRtvFldInf) API</title>
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<h2>Retrieve Field Information (QsnRtvFldInf) API</h2>
<div class="box" style="width: 70%;">
<br>
&nbsp;&nbsp;Required Parameter Group:<br>
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<br>
<table width="100%">
<tr>
<td align="center" valign="top" width="10%">1</td>
<td align="left" valign="top" width="50%">Input buffer handle</td>
<td align="left" valign="top" width="20%">Input</td>
<td align="left" valign="top" width="20%">Binary(4)</td>
</tr>
<tr>
<td align="center" valign="top">2</td>
<td align="left" valign="top">Field number</td>
<td align="left" valign="top">Input</td>
<td align="left" valign="top">Binary(4)</td>
</tr>
<tr>
<td align="center" valign="top">3</td>
<td align="left" valign="top">Receiver variable</td>
<td align="left" valign="top">Output</td>
<td align="left" valign="top">Char(*)</td>
</tr>
<tr>
<td align="center" valign="top">4</td>
<td align="left" valign="top">Length of receiver variable</td>
<td align="left" valign="top">Input</td>
<td align="left" valign="top">Bin(4)</td>
</tr>
</table>
<br>
&nbsp;&nbsp;Omissible Parameter Group:<br>
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<br>
<table width="100%">
<tr>
<td align="center" valign="top" width="10%">5</td>
<td align="left" valign="top" width="50%">Low-level environment handle</td>
<td align="left" valign="top" width="20%">Input</td>
<td align="left" valign="top" width="20%">Binary(4)</td>
</tr>
<tr>
<td align="center" valign="top">6</td>
<td align="left" valign="top">Error code</td>
<td align="left" valign="top">I/O</td>
<td align="left" valign="top">Char(*)</td>
</tr>
</table>
<br>
&nbsp;&nbsp;Returned Value:<br>
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<tr>
<td align="center" valign="top" width="10%"></td>
<td align="left" valign="top" width="50%">Return code</td>
<td align="left" valign="top" width="20%">Output</td>
<td align="left" valign="top" width="20%">Binary(4)</td>
</tr>
</table>
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&nbsp;&nbsp;Default Public Authority: *USE<br>
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<br>
&nbsp;&nbsp;Service Program: QSNAPI<br>
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&nbsp;&nbsp;Threadsafe: No<br>
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</div>
<p>The Retrieve Field Information (QsnRtvFldInf) API retrieves information
about a field in an input buffer filled by a Read Modified Fields (QsnReadMDT),
Read Modified Alternate (QsnReadMDTAlt), or Read Modified Immediate Alternate
(QsnReadMDTImmAlt) operation.</p>
<p>To query the results from a Read Input Fields (QsnReadInp) or Read Immediate
(QsnReadImm) operation, use the Retrieve Length of Field Data in Buffer
(QsnRtvFldDtaLen) and Retrieve Pointer to Field Data (QsnRtvFldDta) APIs. To
query the result from any other input operations, use the Retrieve Length of
Data in Input Buffer (QsnRtvDtaLen) and Retrieve Pointer to Data in Input
Buffer (QsnRtvDta) APIs.</p>
<br>
<h3>Authorities and Locks</h3>
<p>None</p>
<br>
<h3>Required Parameter Group</h3>
<dl>
<dt><strong>Input buffer handle</strong></dt>
<dd>INPUT; BINARY(4)
<p>A handle for the input buffer that contains the results of the input
operation.</p>
</dd>
<dt><strong>Field number</strong></dt>
<dd>INPUT; BINARY(4)
<p>The number of the field to query, specified as n, where n is the nth field
in the input buffer. The value specified must not be greater than the field
count returned by the read operation.</p>
</dd>
<dt><strong>Receiver variable</strong></dt>
<dd>Output; CHAR(*)
<p>The structure that will contain the result of the query when the
QsnRtvFldInf API has completed.</p>
</dd>
<dt><strong>Length of receiver variable</strong></dt>
<dd>Input; BINARY(4)
<p>The length of the receiver variable parameter.</p>
</dd>
</dl>
<br>
<h3>Omissible Parameter Group</h3>
<dl>
<dt><strong>Low-level environment handle</strong></dt>
<dd>INPUT; BINARY(4)
<p>The low-level environment that the operation applies to. If this parameter
is omitted or given with a value of zero, the default low-level environment is
used.</p>
</dd>
<dt><strong>Error code</strong></dt>
<dd>I/O; CHAR(*)
<p>The structure in which to return error information. For the format of the
structure, see <a href="../apiref/error.htm#hdrerrcod">Error Code Parameter</a>. If this
parameter is omitted, diagnostic and escape messages are issued to the
application.</p>
</dd>
</dl>
<br>
<h3>Returned Value</h3>
<dl>
<dt><strong>Return code</strong></dt>
<dd>OUTPUT; BINARY(4)
<p>A return code indicating the result of the operation. The value returned
will be 0 if the operation was successful, or -1 otherwise.</p>
</dd>
</dl>
<br>
<h3><a name="HDRINFLDQF">Format of the Query Input Field Result</a></h3>
<table border width="80%">
<tr>
<th align="center" valign="bottom" colspan="2">Offset</th>
<th align="left" valign="bottom" rowspan="2">Type</th>
<th align="left" valign="bottom" rowspan="2">Field</th>
</tr>
<tr>
<th align="center" valign="bottom">Dec</th>
<th align="center" valign="bottom">Hex</th>
</tr>
<tr>
<td align="center" valign="top" width="10%">0</td>
<td align="center" valign="top" width="10%">0</td>
<td align="left" valign="top" width="20%">BINARY(4)</td>
<td align="left" valign="top" width="40%">Bytes returned</td>
</tr>
<tr>
<td align="center" valign="top">4</td>
<td align="center" valign="top">4</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Bytes available</td>
</tr>
<tr>
<td align="center" valign="top">8</td>
<td align="center" valign="top">8</td>
<td align="left" valign="top">CHAR(1)</td>
<td align="left" valign="top">Type of field</td>
</tr>
<tr>
<td align="center" valign="top">9</td>
<td align="center" valign="top">9</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Row position of field</td>
</tr>
<tr>
<td align="center" valign="top">13</td>
<td align="center" valign="top">D</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Column position of field</td>
</tr>
<tr>
<td align="center" valign="top">17</td>
<td align="center" valign="top">11</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Length of data read</td>
</tr>
<tr>
<td align="center" valign="top">21</td>
<td align="center" valign="top">15</td>
<td align="left" valign="top">CHAR(11)</td>
<td align="left" valign="top">Reserved</td>
</tr>
<tr>
<td align="center" valign="top">32</td>
<td align="center" valign="top">20</td>
<td align="left" valign="top">PTR(SPP)</td>
<td align="left" valign="top">Pointer to field data</td>
</tr>
</table>
<br>
<br>
<h3><a name="Header_233">Field Descriptions</a></h3>
<p><strong>Bytes available.</strong> The number of bytes of data available to
be returned. All available data is returned if enough space is provided.</p>
<p><strong>Bytes returned.</strong> The number of bytes of data returned.</p>
<p><strong>Column position of field.</strong> The column position relative to
the window of the specified field on the screen.</p>
<p><strong>Length of data read.</strong> The length of the data read from the
specified field.</p>
<p><strong>Pointer to field data.</strong> A pointer to the data for the
specified field.</p>
<p><strong>Row position of field.</strong> The row position relative to the
window of the specified field on the screen.</p>
<p><strong>Type of field.</strong> The type of the specified field. The
possible values are:</p>
<table cellpadding="3">
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<tr>
<th align="left" valign="top">Value</th>
<th align="left" valign="top">Description</th>
</tr>
<tr>
<td align="left" valign="top"><em>1</em></td>
<td valign="top">Normal field</td>
</tr>
<tr>
<td align="left" valign="top"><em>2</em></td>
<td valign="top">Transparent field</td>
</tr>
</table>
<br>
<br>
<h3>Error Messages</h3>
<table width="100%" cellpadding="3">
<!-- cols="15 85" -->
<tr>
<th align="left" valign="top">Message ID</th>
<th align="left" valign="top">Error Message Text</th>
</tr>
<tr>
<td align="left" valign="top">CPF24B4 E</td>
<td valign="top">Severe error while addressing parameter list.</td>
</tr>
<tr>
<td align="left" valign="top">CPF3C24 E</td>
<td valign="top">Length of the receiver variable is not valid.</td>
</tr>
<tr>
<td align="left" valign="top">CPF3CF1 E</td>
<td valign="top">Error code parameter not valid.</td>
</tr>
<tr>
<td align="left" valign="top">CPF3CF2 E</td>
<td valign="top">Error(s) occurred during running of &amp;1 API.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA319 E</td>
<td valign="top">No data in input buffer.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA31A E</td>
<td valign="top">Incorrect field number value &amp;1 specified.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA31E E</td>
<td valign="top">Required parameter &amp;1 omitted.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA32E E</td>
<td valign="top">Input data for query operation incorrect.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA32F E</td>
<td valign="top">Buffer type incorrect.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA331 E</td>
<td valign="top">Buffer handle incorrect.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA334 E</td>
<td valign="top">Low level environment handle incorrect.</td>
</tr>
</table>
<br>
<hr>
API introduced: V2R3
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