316 lines
7.7 KiB
HTML
316 lines
7.7 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>Run Database Hash (qdbrunha) API</title>
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<!-- Begin Header Records ========================================== -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Print SCRIPT A converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!--File Edited March 2001 -->
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<!-- This file has undergone html cleanup on 1/7/02 by JET -->
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<!-- Miscellaneous fixes on 05/01/13 by JET -->
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<!--End Header Records -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<a name="top_Of_Page"></a>
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<!-- Java sync-link -->
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<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
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</script>
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<h2>Run Database Hash (qdbrunha) API</h2>
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<div class="box" style="width: 80%;">
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<br>
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Required Parameter Group:<br>
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<!-- iddvc RMBR -->
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%">1</td>
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<td align="left" valign="top" width="50%">Hash name</td>
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<td align="left" valign="top" width="20%">Input</td>
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<td align="left" valign="top" width="20%">Char(10)</td>
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</tr>
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<tr>
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<td align="center" valign="top">2</td>
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<td align="left" valign="top">Function</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Char(1)</td>
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</tr>
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<tr>
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<td align="center" valign="top">3</td>
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<td align="left" valign="top">Number of keys</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">4</td>
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<td align="left" valign="top">Key values</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Char(*)</td>
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</tr>
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<tr>
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<td align="center" valign="top">5</td>
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<td align="left" valign="top">Data</td>
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<td align="left" valign="top">I/O</td>
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<td align="left" valign="top">Char(*)</td>
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</tr>
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<tr>
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<td align="center" valign="top">6</td>
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<td align="left" valign="top">Length of Data</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">7</td>
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<td align="left" valign="top">Return code</td>
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<td align="left" valign="top">Output</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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</table>
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<br>
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Service Program Name: QDBRUNHA<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: No<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The Run Database Hash (qdbrunha) API allows the user to FETCH, UPDATE,
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DELETE and INSERT data into existing database files using an alternative access
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method. The hash approach can be used on relatively static files in situations
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where it is desirable to reduce the amount of memory that is consumed by
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indexes. Its affectiveness is reduced in memory-rich environments or
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environments with dynamic data.</p>
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<br>
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<h3>Authorities and Locks</h3>
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<dl>
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<dt><em>HASH User Space in Library QUSRSYS</em></dt>
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<dd>*OBJOPR, *READ, and *UPDATE</dd>
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</dl>
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<br>
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<h3>Required Parameter Group</h3>
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<dl>
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<dt><strong>Hash name</strong></dt>
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<dd>INPUT; CHAR(10)
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<p>The hash name used to access the data. See the description of the Create
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Database Hash (qdbcrtha) API for information on defining and naming
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the hash.</p>
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</dd>
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<dt><strong>Function</strong></dt>
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<dd>INPUT; CHAR(1)
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<p>The function to be performed. The possible values are character digits as
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follows:</p>
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<table width="100%">
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<tr>
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<td width="5%" valign="top"><em>1</em></td>
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<td width="95%" valign="top">Fetch a row for read purposes only</td>
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</tr>
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<tr>
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<td valign="top"><em>2</em></td>
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<td valign="top">Fetch a row with intent to update</td>
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</tr>
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<tr>
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<td valign="top"><em>3</em></td>
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<td valign="top">Update the currently locked row</td>
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</tr>
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<tr>
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<td valign="top"><em>4</em></td>
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<td valign="top">Delete the currently locked row</td>
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</tr>
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<tr>
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<td valign="top"><em>5</em></td>
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<td valign="top">Insert a row into the database</td>
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</tr>
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</table>
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</dd>
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<dd><br>
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</dd>
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<dt><strong>Number of keys</strong></dt>
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<dd>INPUT; BINARY(4)
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<p>The number of keys used by the hash.</p>
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</dd>
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<dt><strong>Key values</strong></dt>
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<dd>INPUT; CHAR(*)
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<p>A structure containing up to five rows of the name of key fields and the
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value of key fields in the order that they appear in the logical file used to
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create the hash. For more details, see <a href="#HDRFIELDR">Field
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Descriptions</a>.</p>
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<table border width="80%">
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<tr>
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<th align="center" valign="bottom" colspan="2">Offset</th>
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<th align="left" valign="bottom" rowspan="2">Type</th>
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<th align="left" valign="bottom" rowspan="2">Field</th>
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</tr>
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<tr>
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<th align="center" valign="bottom">Dec</th>
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<th align="center" valign="bottom">Hex</th>
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</tr>
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<tr>
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<td align="center" valign="top" width="10%"></td>
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<td align="center" valign="top" width="10%"></td>
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<td align="left" valign="top" width="20%">CHAR(10)</td>
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<td align="left" valign="top" width="60%">Name of key</td>
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</tr>
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<tr>
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<td align="center" valign="top"></td>
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<td align="center" valign="top"></td>
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<td align="left" valign="top">Binary(4)</td>
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<td align="left" valign="top">Value of key</td>
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</tr>
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</table>
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</dd>
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<dd><br>
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</dd>
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<dt><strong>Data</strong></dt>
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<dd>I/O; CHAR(*)
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<p>A pointer to the actual row of data from the database to be manipulated
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according to the function parameter. The row will be inserted, deleted,
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updated, or fetched from the database.</p>
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</dd>
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<dt><strong>Data length</strong></dt>
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<dd>INPUT; BINARY(4)
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<p>The length of the buffer in the application that will receive or contain the
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data.</p>
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</dd>
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<dt><strong>Return code</strong></dt>
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<dd>OUTPUT; BINARY(4)
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<p>A numeric indication as to what took place during the hash function request.
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The possible values are:</p>
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<table width="100%">
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<tr>
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<td width="5%" valign="top"><em>0</em></td>
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<td width="95%" valign="top">No errors.</td>
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</tr>
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<tr>
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<td valign="top"><em>1</em></td>
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<td valign="top">Hash user space does not exist.</td>
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</tr>
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<tr>
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<td valign="top"><em>2</em></td>
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<td valign="top">Hash does not exist.</td>
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</tr>
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<tr>
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<td valign="top"><em>100</em></td>
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<td valign="top">Record not found.</td>
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</tr>
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<tr>
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<td valign="top"><em>812</em></td>
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<td valign="top">Lock-wait time-out.</td>
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</tr>
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<tr>
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<td valign="top"><em>-99</em></td>
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<td valign="top">Another error was encountered and ignored. See job log for
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details.</td>
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</tr>
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</table>
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</dd>
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</dl>
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<br>
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<h3><a name="HDRFIELDR">Field Descriptions</a></h3>
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<p><strong>Name of key.</strong> The name of the key field in the order that
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they appear in the logical file referenced in the associated Create Database
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Hash (QDBCRTHA) API. The names are for documentation purposes only.</p>
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<p><strong>Value of key.</strong> The key value used by the API to access the
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appropriate record in the file.</p>
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<br>
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<h3>Error Messages</h3>
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<p>Only the error conditions listed in the return code parameter are monitored.
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No error messages other than the value of the return code parameter are
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returned.</p>
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<br>
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<hr>
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API Introduced: V4R3
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="#top_Of_Page">Top</a> | <a href=
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"file1.htm">Database and File APIs</a> | <a href="aplist.htm">APIs by
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category</a></td>
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</tr>
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</table>
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</center>
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<br>
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</body>
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</html>
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