940 lines
35 KiB
HTML
940 lines
35 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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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="dc.language" scheme="rfc1766" content="en-us" />
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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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<meta name="dc.date" scheme="iso8601" content="2005-09-19" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow"/>
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="keywords" content="GET DESCRIPTOR statement, GET DESCRIPTOR,
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SQL statements, in GET DESCRIPTOR statement, SQL-descriptor-name, COUNT,
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DYNAMIC_FUNCTION, DYNAMIC_FUNCTION_CODE, KEY_TYPE, DB2_MAX_ITEMS,
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DB2_BASE_CATALOG_NAME, DB2_BASE_COLUMN_NAME, DB2_BASE_SCHEMA_NAME,
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DB2_BASE_TABLE_NAME, DB2_CCSID, DB2_COLUMN_CATALOG_NAME, DB2_COLUMN_GENERATED,
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DB2_COLUMN_GENERATION_TYPE, DB2_COLUMN_NAME, DB2_COLUMN_SCHEMA_NAME,
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DB2_COLUMN_TABLE_NAME, DB2_COLUMN_UPDATABILITY, DB2_CORRELATION_NAME, DB2_LABEL,
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DB2_PARAMETER_NAME, DB2_SYSTEM_COLUMN_NAME, DATA, DATETIME_INTERVAL_CODE,
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INDICATOR, KEY_MEMBER, LENGTH, LEVEL, NAME, NULLABLE, OCTET_LENGTH,
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PARAMETER_MODE, PARAMETER_ORDINAL_POSITION, PARAMETER_SPECIFIC_CATALOG,
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PARAMETER_SPECIFIC_NAME, PARAMETER_SPECIFIC_SCHEMA, PRECISION, RETURNED_LENGTH,
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RETURNED_OCTET_LENGTH, SCALE, TYPE, UNNAMED, USER_DEFINED_TYPE_CATALOG,
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USER_DEFINED_TYPE_CODE, USER_DEFINED_TYPE_NAME, USER_DEFINED_TYPE_SCHEMA,
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SQL (Structured Query Language), description" />
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<title>GET DESCRIPTOR</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="getdescr"></a>
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<h2 id="getdescr"><a href="rbafzmst02.htm#ToC_1086">GET DESCRIPTOR</a></h2><a id="idx2616" name="idx2616"></a><a id="idx2617" name="idx2617"></a>
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<p>The GET DESCRIPTOR statement gets information from an SQL descriptor.</p>
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<a name="wq1515"></a>
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<h3 id="wq1515"><a href="rbafzmst02.htm#ToC_1087">Invocation</a></h3>
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<p>This statement can only be embedded in an application program,
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SQL function, SQL procedure, or trigger. It cannot be issued interactively.
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It is an executable statement that cannot be dynamically prepared. It must
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not be specified in REXX.</p>
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<a name="wq1516"></a>
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<h3 id="wq1516"><a href="rbafzmst02.htm#ToC_1088">Authorization</a></h3>
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<p>None required.</p>
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<a name="wq1517"></a>
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<h3 id="wq1517"><a href="rbafzmst02.htm#ToC_1089">Syntax</a></h3>
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<a href="rbafzgetdescr.htm#syngetdescr"><img src="c.gif" alt="Click to skip syntax diagram" /></a>
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<a name="wq1518"></a>
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<div class="fignone" id="wq1518">
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn342.htm"
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border="0" /></span><a href="#skipsyn-341"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a> .-SQL-. .-LOCAL--.
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>>-GET--+-----+--DESCRIPTOR--+--------+--<span class="italic">SQL-descriptor-name</span>---->
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'-GLOBAL-'
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.-,---------------.
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V |
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>--+---<span class="italic">get-header-info</span>-+----------------------------+----------><
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| .-,-------------. |
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| V | |
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'-VALUE--+-<span class="italic">integer</span>----------+----<span class="italic">get-item-info</span>-+-'
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'-<span class="italic">integer-variable</span>-'
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</pre>
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<a name="skipsyn-341" id="skipsyn-341"></a></div>
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<a name="wq1519"></a>
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<div class="fignone" id="wq1519">
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn343.htm"
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border="0" /></span><a href="#skipsyn-342"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a>get-header-info:
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|--<span class="italic">variable-1</span>-- = --+-COUNT-----------------+-------------------|
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+-DYNAMIC_FUNCTION------+
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+-DYNAMIC_FUNCTION_CODE-+
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+-KEY_TYPE--------------+
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'-DB2_MAX_ITEMS---------'
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get-item-info:
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|--<span class="italic">variable-2</span>-- = --+-DATA-----------------------+--------------|
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+-DATETIME_INTERVAL_CODE-----+
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+-DB2_BASE_CATALOG_NAME------+
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+-DB2_BASE_COLUMN_NAME-------+
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+-DB2_BASE_SCHEMA_NAME-------+
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+-DB2_BASE_TABLE_NAME--------+
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+-DB2_CCSID------------------+
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+-DB2_COLUMN_CATALOG_NAME----+
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+-DB2_COLUMN_GENERATED-------+
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+-DB2_COLUMN_GENERATION_TYPE-+
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+-DB2_COLUMN_NAME------------+
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+-DB2_COLUMN_SCHEMA_NAME-----+
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+-DB2_COLUMN_TABLE_NAME------+
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+-DB2_COLUMN_UPDATABILITY----+
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+-DB2_CORRELATION_NAME-------+
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+-DB2_LABEL------------------+
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+-DB2_PARAMETER_NAME---------+
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+-DB2_SYSTEM_COLUMN_NAME-----+
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+-INDICATOR------------------+
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+-KEY_MEMBER-----------------+
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+-LENGTH---------------------+
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+-LEVEL----------------------+
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+-NAME-----------------------+
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+-NULLABLE-------------------+
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+-OCTET_LENGTH---------------+
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+-PARAMETER_MODE-------------+
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+-PARAMETER_ORDINAL_POSITION-+
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+-PARAMETER_SPECIFIC_CATALOG-+
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+-PARAMETER_SPECIFIC_NAME----+
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+-PARAMETER_SPECIFIC_SCHEMA--+
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+-PRECISION------------------+
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+-RETURNED_LENGTH------------+
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+-RETURNED_OCTET_LENGTH------+
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+-SCALE----------------------+
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+-TYPE-----------------------+
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+-UNNAMED--------------------+
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+-USER_DEFINED_TYPE_CATALOG--+
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+-USER_DEFINED_TYPE_CODE-----+
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+-USER_DEFINED_TYPE_NAME-----+
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'-USER_DEFINED_TYPE_SCHEMA---'
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</pre>
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<a name="skipsyn-342" id="skipsyn-342"></a></div>
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<a name="syngetdescr"></a>
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<h3 id="syngetdescr"><a href="rbafzmst02.htm#ToC_1090">Description</a></h3>
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<dl class="parml">
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<dt class="bold">LOCAL</dt>
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<dd>Specifies the scope of the name of the descriptor to be local to program
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invocation. The information is returned from the descriptor known in this
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local scope.
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</dd>
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<dt class="bold">GLOBAL</dt>
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<dd>Specifies the scope of the name of the descriptor to be global to the
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SQL session. The information is returned from the descriptor known to any
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program that executes using the same database connection.
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</dd>
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<dt class="bold"><var class="pv">SQL-descriptor-name</var></dt>
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<dd>Names the SQL descriptor. The name must identify a descriptor that already
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exists with the specified scope.<a id="idx2618" name="idx2618"></a>
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</dd>
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<dt class="bold"><var class="pv">get-header-info</var></dt>
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<dd>Returns information about the prepared SQL statement and SQL descriptor.
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</dd>
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<dt class="bold">VALUE</dt>
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<dd>Identifies the item number for which the specified information is retrieved.
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If the value is greater than the value of COUNT (from the header information),
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then no result is returned. If the item number is greater than the maximum
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number of items allocated for the descriptor or the item number is less than
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1, an error is returned.
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<dl class="parml">
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<dt class="bold"><var class="pv">integer</var></dt>
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<dd>An integer constant in the range of 1 to the number of items in the
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SQL descriptor.
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</dd>
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<dt class="bold"><var class="pv">integer-variable</var></dt>
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<dd>Identifies a variable declared in the program in accordance
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with the rules for declaring variables. The data type of the variable must
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be SMALLINT, INTEGER, BIGINT, or DECIMAL or NUMERIC with a scale of zero.
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The value of <var class="pv">integer-variable</var> must be in the range of 1 to the maximum
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number of items in the SQL descriptor.
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</dd>
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</dl>
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</dd>
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<dt class="bold"><var class="pv">get-item-info</var></dt>
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<dd>Returns information about a specific item in the SQL descriptor.
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</dd>
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</dl>
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<a name="gethdrinfo"></a>
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<h4 id="gethdrinfo"><span><var class="pv">get-header-info</var></span></h4>
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<p></p>
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<dl class="parml">
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<dt class="bold"><var class="pv">variable–1</var></dt>
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<dd>Identifies a variable declared in the program in accordance
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with the rules for declaring variables, but must not be a file reference variable.
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The data type of the variable must be compatible with the descriptor information
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item as specified in <a href="rbafzgetdescr.htm#getdesctable">Table 56</a>. The variable is assigned
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(using storage assignment rules) to the corresponding descriptor item. For
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details on the assignment rules, see <a href="rbafzmstch2bas.htm#ch2bas">Assignments and comparisons</a>.
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</dd>
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<dt class="bold">COUNT</dt><a id="idx2619" name="idx2619"></a>
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<dd>A count of the number of items in the descriptor.
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</dd>
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<dt class="bold">DYNAMIC_FUNCTION</dt><a id="idx2620" name="idx2620"></a>
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<dd>The type of the prepared SQL statement as a character string. For information
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on statement type, see <a href="rbafzmstgetdiag.htm#stmtstrcode">Table 59</a>.
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</dd>
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<dt class="bold">DYNAMIC_FUNCTION_CODE</dt><a id="idx2621" name="idx2621"></a>
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<dd>The statement code representing the type of the prepared SQL statement.
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For information on statement codes, see <a href="rbafzmstgetdiag.htm#stmtstrcode">Table 59</a>.
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</dd>
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<dt class="bold">KEY_TYPE</dt><a id="idx2622" name="idx2622"></a>
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<dd>The type of key included in the select list. The possible values are:
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<dl>
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<dt class="bold">0</dt>
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<dd>The descriptor is not describing the columns of a query or there are
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no key columns referenced in the query, or there is no unique key.
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</dd>
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<dt class="bold">1</dt>
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<dd>The select list includes all the columns of the primary key of the base
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table referenced by the query.
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</dd>
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<dt class="bold">2</dt>
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<dd>The table referenced by the query does not have a primary key but the
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select list includes a set of columns that are defined as the preferred candidate
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key. If there is more than one such preferred candidate key included in the
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select list, the left-most preferred candidate key is used.
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</dd>
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</dl>
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</dd>
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<dt class="bold">DB2_MAX_ITEMS</dt><a id="idx2623" name="idx2623"></a>
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<dd>Represents the value specified as the allocated maximum number of item
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descriptors on the ALLOCATE DESCRIPTOR statement. If the WITH MAX clause was
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not specified, the value is the default number of maximum items for the ALLOCATE
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DESCRIPTOR statement.
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</dd>
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</dl>
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<a name="getiteminfo"></a>
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<h4 id="getiteminfo"><span><var class="pv">get-item-info</var></span></h4>
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<p></p>
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<dl class="parml">
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<dt class="bold"><var class="pv">variable–2</var></dt>
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<dd>Identifies a variable declared in the program in accordance
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with the rules for declaring variables, but must not be a file reference variable.
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The data type of the variable must be compatible with the descriptor information
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item as specified in <a href="rbafzgetdescr.htm#getdesctable">Table 56</a>. The variable is assigned
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(using storage assignment rules) to the corresponding descriptor item. For
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details on the assignment rules, see <a href="rbafzmstch2bas.htm#ch2bas">Assignments and comparisons</a>.
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<p>When getting the DATA item, in general the variable must have the same data
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type, length, precision, scale, and CCSID as specified in <a href="rbafzgetdescr.htm#getdesctable">Table 56</a>.
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For variable-length types, the variable length must not be less than the
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LENGTH in the descriptor. For C nul-terminated types, the variable length
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must be at least one greater than the LENGTH in the descriptor.</p>
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</dd>
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<dt class="bold">DB2_BASE_CATALOG_NAME</dt><a id="idx2624" name="idx2624"></a>
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<dd>The server name of the base table for the column represented by the
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item descriptor.
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</dd>
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<dt class="bold">DB2_BASE_COLUMN_NAME</dt><a id="idx2625" name="idx2625"></a>
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<dd>The name of the column as defined in the base table referenced
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in the described query, possibly indirectly through a view. If a column name
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cannot be defined or is not applicable, this item will contain the empty string.
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The name is returned as case sensitive and without delimiters.
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</dd>
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<dt class="bold">DB2_BASE_SCHEMA_NAME</dt><a id="idx2626" name="idx2626"></a>
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<dd>The schema name of the base table for the column represented
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by the item descriptor. If a schema name cannot be defined or is not applicable,
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this item will contain the empty string. The name is returned as case sensitive
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and without delimiters.
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</dd>
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<dt class="bold">DB2_BASE_TABLE_NAME</dt><a id="idx2627" name="idx2627"></a>
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<dd>The table name of the underlying base table for the column
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represented by the item descriptor. If a table name cannot be defined or is
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not applicable, this item will contain the empty string. The name is returned
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as case sensitive and without delimiters.
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</dd>
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<dt class="bold">DB2_CCSID</dt><a id="idx2628" name="idx2628"></a>
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<dd>The CCSID of character or graphic data. Value is zero for
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all types that are not based on character or graphic string types. Value is
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65535 for binary types or character types with the FOR BIT DATA attribute.
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</dd>
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<dt class="bold">DB2_COLUMN_CATALOG_NAME</dt><a id="idx2629" name="idx2629"></a>
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<dd>The server name of the referenced table or view for the column represented
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by the item descriptor. If a column catalog name cannot be defined or is not
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applicable, this item will contain the empty string.
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</dd>
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<dt class="bold">DB2_COLUMN_GENERATED</dt><a id="idx2630" name="idx2630"></a>
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<dd>Indicates whether a column is generated. Possible values are:
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<dl>
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<dt class="bold">0</dt>
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<dd>Not generated
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</dd>
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<dt class="bold">1</dt>
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<dd>GENERATED ALWAYS
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</dd>
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<dt class="bold">2</dt>
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<dd>GENERATED BY DEFAULT
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</dd>
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</dl>
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</dd>
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<dt class="bold">DB2_COLUMN_GENERATION_TYPE</dt><a id="idx2631" name="idx2631"></a>
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<dd>Indicates how the column is generated. Possible values are:
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<dl>
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<dt class="bold">0</dt>
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<dd>Not generated
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</dd>
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<dt class="bold">1</dt>
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<dd>IDENTITY column
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</dd>
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<dt class="bold">2</dt>
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<dd>ROWID column
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</dd>
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</dl>
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</dd>
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<dt class="bold">DB2_COLUMN_NAME </dt><a id="idx2632" name="idx2632"></a>
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<dd>The name of the column as defined in the table or view referenced
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in the described query. If a column name cannot be defined or is not applicable,
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this item will contain the empty string. The name is returned as case sensitive
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and without delimiters.
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</dd>
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<dt class="bold">DB2_COLUMN_SCHEMA_NAME </dt><a id="idx2633" name="idx2633"></a>
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<dd>The schema name of the referenced table or view for the column
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represented by the item descriptor. If a column schema name cannot be defined
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or is not applicable, this item will contain the empty string. The name is
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returned as case sensitive and without delimiters.
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</dd>
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<dt class="bold">DB2_COLUMN_TABLE_NAME</dt><a id="idx2634" name="idx2634"></a>
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<dd>The table or view name of the referenced table or view for
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the column represented by the item descriptor. If a column table name cannot
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be defined or is not applicable, this item will contain the empty string.
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The name is returned as case sensitive and without delimiters.
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</dd>
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<dt class="bold">DB2_COLUMN_UPDATABILITY</dt><a id="idx2635" name="idx2635"></a>
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<dd>Indicates whether the column represented by the item descriptor is updatable.
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Possible values are:
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<dl>
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<dt class="bold">0</dt>
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<dd>Not updatable
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</dd>
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<dt class="bold">1</dt>
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<dd>Updatable
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</dd>
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</dl>
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</dd>
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<dt class="bold"> DB2_CORRELATION_NAME</dt><a id="idx2636" name="idx2636"></a>
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<dd>The empty string is always returned.
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</dd>
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<dt class="bold">DB2_LABEL</dt><a id="idx2637" name="idx2637"></a>
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<dd>The label defined for the column. If there is no label for the column,
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this item will contain the empty string.
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</dd>
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<dt class="bold">DB2_PARAMETER_NAME</dt><a id="idx2638" name="idx2638"></a>
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<dd>The name of the parameter for the stored procedure. Only
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returned for a CALL statement. The name is returned as case sensitive and
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without delimiters.
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</dd>
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<dt class="bold">DB2_SYSTEM_COLUMN_NAME</dt><a id="idx2639" name="idx2639"></a>
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<dd>The system name of the column. If a system name cannot be
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defined or is not applicable, this item will contain blanks.
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</dd>
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<dt class="bold">DATA</dt><a id="idx2640" name="idx2640"></a>
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<dd>The value for the data described by the item descriptor. If the value
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of INDICATOR is negative, then the value of DATA is undefined and the INDICATOR <var class="pv">get-item-info</var> must also be specified in the same statement.
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</dd>
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<dt class="bold">DATETIME_INTERVAL_CODE</dt><a id="idx2641" name="idx2641"></a>
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<dd>Codes that define the specific datetime data type.
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<dl>
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<dt class="bold">0</dt>
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<dd>Descriptor item does not have TYPE value of 9.
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</dd>
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<dt class="bold">1</dt>
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<dd>DATE
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</dd>
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<dt class="bold">2</dt>
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<dd>TIME
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</dd>
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<dt class="bold">3</dt>
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<dd>TIMESTAMP
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</dd>
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</dl>
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</dd>
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<dt class="bold">INDICATOR</dt><a id="idx2642" name="idx2642"></a>
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<dd>The value for the indicator. A negative value is used when
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the value returned in this descriptor item is the null value. A non-negative
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value is used when the value returned in this descriptor item is given in
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the DATA field.
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</dd>
|
|
<dt class="bold">KEY_MEMBER</dt><a id="idx2643" name="idx2643"></a>
|
|
<dd>An indication of whether this column is part of a key.
|
|
<dl>
|
|
<dt class="bold">0</dt>
|
|
<dd>This column is not part of a key.
|
|
</dd>
|
|
<dt class="bold">1</dt>
|
|
<dd>This column is part of a unique key.
|
|
</dd>
|
|
<dt class="bold">2</dt>
|
|
<dd>This column by itself is a unique key.
|
|
</dd>
|
|
</dl>
|
|
</dd>
|
|
<dt class="bold">LENGTH</dt><a id="idx2644" name="idx2644"></a>
|
|
<dd>Returns the maximum length of the data. If the data type is a character
|
|
or graphic string type or a datetime type, the length represents the number
|
|
of characters (not bytes). If the data type is a binary string or any other
|
|
type, the length represents the number of bytes. For a description of data
|
|
type codes and lengths, see <a href="rbafzgetdescr.htm#datatypecode">Table 57</a>.
|
|
</dd>
|
|
<dt class="bold">LEVEL</dt><a id="idx2645" name="idx2645"></a>
|
|
<dd>The level of the item descriptor. The value is 0.
|
|
</dd>
|
|
<dt class="bold">NAME</dt><a id="idx2646" name="idx2646"></a>
|
|
<dd>The name associated with the select list column described
|
|
by the item descriptor. The name is returned as case sensitive and without
|
|
delimiters.
|
|
</dd>
|
|
<dt class="bold">NULLABLE</dt><a id="idx2647" name="idx2647"></a>
|
|
<dd>Indicates whether the column or parameter marker is nullable.
|
|
<dl>
|
|
<dt class="bold">0</dt>
|
|
<dd>The select list column or parameter marker cannot have a null value.
|
|
</dd>
|
|
<dt class="bold">1</dt>
|
|
<dd>The select list column or parameter marker can have a null value.
|
|
</dd>
|
|
</dl>
|
|
</dd>
|
|
<dt class="bold">OCTET_LENGTH </dt><a id="idx2648" name="idx2648"></a>
|
|
<dd>Returns the maximum length of the data in bytes for all types. For a
|
|
description of data type codes and lengths, see <a href="rbafzgetdescr.htm#datatypecode">Table 57</a>.
|
|
</dd>
|
|
<dt class="bold">PARAMETER_MODE</dt><a id="idx2649" name="idx2649"></a>
|
|
<dd>The mode of the parameter marker in a CALL statement.
|
|
<dl>
|
|
<dt class="bold">0</dt>
|
|
<dd>The descriptor is not associated with a CALL statement.
|
|
</dd>
|
|
<dt class="bold">1</dt>
|
|
<dd>Input only parameter.
|
|
</dd>
|
|
<dt class="bold">2</dt>
|
|
<dd>Input and output parameter.
|
|
</dd>
|
|
<dt class="bold">4</dt>
|
|
<dd>Output only parameter.
|
|
</dd>
|
|
</dl>
|
|
</dd>
|
|
<dt class="bold">PARAMETER_ORDINAL_POSITION</dt><a id="idx2650" name="idx2650"></a>
|
|
<dd>The ordinal position of the parameter marker in a CALL statement. The
|
|
value is 0 if the descriptor is not associated with a CALL statement.
|
|
</dd>
|
|
<dt class="bold">PARAMETER_SPECIFIC_CATALOG</dt><a id="idx2651" name="idx2651"></a>
|
|
<dd>The server name of the procedure containing the parameter marker.
|
|
</dd>
|
|
<dt class="bold">PARAMETER_SPECIFIC_NAME</dt><a id="idx2652" name="idx2652"></a>
|
|
<dd>The specific name of the procedure containing the parameter
|
|
marker. The name is returned as case sensitive and without delimiters.
|
|
</dd>
|
|
<dt class="bold">PARAMETER_SPECIFIC_SCHEMA</dt><a id="idx2653" name="idx2653"></a>
|
|
<dd>The schema name of the procedure containing the parameter
|
|
marker. The name is returned as case sensitive and without delimiters.
|
|
</dd>
|
|
<dt class="bold">PRECISION</dt><a id="idx2654" name="idx2654"></a>
|
|
<dd>Returns the precision for the data:
|
|
<dl>
|
|
<dt class="bold">SMALLINT</dt>
|
|
<dd>4
|
|
</dd>
|
|
<dt class="bold">INTEGER</dt>
|
|
<dd>9
|
|
</dd>
|
|
<dt class="bold">BIGINT</dt>
|
|
<dd>19
|
|
</dd>
|
|
<dt class="bold">NUMERIC and DECIMAL</dt>
|
|
<dd>Defined precision
|
|
</dd>
|
|
<dt class="bold">DOUBLE</dt>
|
|
<dd>53
|
|
</dd>
|
|
<dt class="bold">REAL</dt>
|
|
<dd>24
|
|
</dd>
|
|
<dt class="bold">TIME</dt>
|
|
<dd>0
|
|
</dd>
|
|
<dt class="bold">TIMESTAMP</dt>
|
|
<dd>6
|
|
</dd>
|
|
<dt class="bold">Other data types</dt>
|
|
<dd>0
|
|
</dd>
|
|
</dl>
|
|
</dd>
|
|
<dt class="bold">RETURNED_LENGTH</dt><a id="idx2655" name="idx2655"></a>
|
|
<dd>The returned length in characters for character string and graphic string
|
|
data types. The returned length in bytes for binary string data types.
|
|
</dd>
|
|
<dt class="bold">RETURNED_OCTET_LENGTH</dt><a id="idx2656" name="idx2656"></a>
|
|
<dd>The returned length in bytes for all string data types.
|
|
</dd>
|
|
<dt class="bold">SCALE</dt><a id="idx2657" name="idx2657"></a>
|
|
<dd>Returns the defined scale if the data type is DECIMAL or
|
|
NUMERIC. The scale is 0 for all other data types.
|
|
</dd>
|
|
<dt class="bold">TYPE</dt><a id="idx2658" name="idx2658"></a>
|
|
<dd>Returns a data type code representing the data type of the item. For
|
|
a description of the data type codes and lengths, see <a href="rbafzgetdescr.htm#datatypecode">Table 57</a>.
|
|
</dd>
|
|
<dt class="bold">UNNAMED</dt><a id="idx2659" name="idx2659"></a>
|
|
<dd>A value of 1 indicates that the NAME value is generated by
|
|
the database manager. Otherwise, the value is zero and NAME is the derived
|
|
name of the column in the select list.
|
|
</dd>
|
|
<dt class="bold">USER_DEFINED_TYPE_CATALOG</dt><a id="idx2660" name="idx2660"></a>
|
|
<dd>The server name of the user-defined type. If the type is not a user-defined
|
|
data type, this item contains the empty string.
|
|
</dd>
|
|
<dt class="bold">USER_DEFINED_TYPE_CODE</dt><a id="idx2661" name="idx2661"></a>
|
|
<dd>Indicates whether the type of the descriptor item is a user-defined
|
|
type.
|
|
<dl>
|
|
<dt class="bold">0</dt>
|
|
<dd>The descriptor item is not a user-defined type.
|
|
</dd>
|
|
<dt class="bold">1</dt>
|
|
<dd>The descriptor item is a user-defined type.
|
|
</dd>
|
|
</dl>
|
|
</dd>
|
|
<dt class="bold">USER_DEFINED_TYPE_NAME</dt><a id="idx2662" name="idx2662"></a>
|
|
<dd>The name of the user-defined data type. If the type is not
|
|
a user-defined data type, this item contains the empty string. The name is
|
|
returned as case sensitive and without delimiters.
|
|
</dd>
|
|
<dt class="bold">USER_DEFINED_TYPE_SCHEMA </dt><a id="idx2663" name="idx2663"></a>
|
|
<dd>The schema name of the user-defined data type. If the type
|
|
is not a user-defined data type, this item contains the empty string. The
|
|
name is returned as case sensitive and without delimiters.
|
|
</dd>
|
|
</dl>
|
|
<a name="wq1520"></a>
|
|
<h3 id="wq1520"><a href="rbafzmst02.htm#ToC_1093">Notes</a></h3>
|
|
<p><span class="bold">Data types for items:</span> The following table shows,
|
|
the SQL data type for each descriptor item. When a descriptor item is assigned
|
|
to a variable, the variable must be compatible with the data type of the diagnostic
|
|
item.</p>
|
|
<a name="getdesctable"></a>
|
|
<table id="getdesctable" width="100%" summary="" border="1" frame="border" rules="all">
|
|
<caption>Table 56. Data Types for GET DESCRIPTOR Items</caption>
|
|
<thead valign="bottom">
|
|
<tr>
|
|
<th id="wq1521" width="66%" align="left" valign="bottom">Item Name</th>
|
|
<th id="wq1522" width="33%" align="left" valign="bottom">Data Type</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody valign="top">
|
|
<tr>
|
|
<td colspan="2" align="center" valign="top" headers="wq1521 wq1522"><span class="bold">Header Information</span></td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">COUNT</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DYNAMIC_FUNCTION</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DYNAMIC_FUNCTION_CODE</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">KEY_TYPE</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_MAX_ITEMS</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td colspan="2" align="center" valign="top" headers="wq1521 wq1522"><span class="bold">Item Information</span></td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DATA</td>
|
|
<td headers="wq1522">Matches the data type specified by TYPE</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DATETIME_INTERVAL_CODE</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_BASE_CATALOG_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_BASE_COLUMN_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_BASE_SCHEMA_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_BASE_TABLE_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_CCSID</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_COLUMN_CATALOG_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_COLUMN_GENERATED</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_COLUMN_GENERATION_TYPE</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_COLUMN_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_COLUMN_SCHEMA_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_COLUMN_TABLE_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_COLUMN_UPDATABILITY</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_CORRELATION_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_LABEL</td>
|
|
<td headers="wq1522">VARCHAR(60)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_PARAMETER_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">DB2_SYSTEM_COLUMN_NAME</td>
|
|
<td headers="wq1522">CHAR(10)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">INDICATOR</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">KEY_MEMBER</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">LENGTH</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">LEVEL</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">NULLABLE</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">OCTET_LENGTH</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">PARAMETER_MODE</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">PARAMETER_ORDINAL_POSITION</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">PARAMETER_SPECIFIC_CATALOG</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">PARAMETER_SPECIFIC_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">PARAMETER_SPECIFIC_SCHEMA</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">PRECISION</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">RETURNED_LENGTH</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">RETURNED_OCTET_LENGTH</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">SCALE</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">TYPE</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">UNNAMED</td>
|
|
<td headers="wq1522">INTEGER</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">USER_DEFINED_TYPE_CATALOG</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">USER_DEFINED_TYPE_NAME</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">USER_DEFINED_TYPE_SCHEMA</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1521">USER_DEFINED_TYPE_CODE</td>
|
|
<td headers="wq1522">VARCHAR(128)</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p><span class="bold">SQL data type codes and lengths:</span> The following table
|
|
represents the possible values for TYPE, LENGTH, OCTET_LENGTH, and DATETIME_INTERVAL_CODE
|
|
descriptor items.</p>
|
|
<p>The values in the following table are assigned by the ISO and ANSI SQL
|
|
Standard and may change as the standard evolves. Include <span class="italic">sqlscds</span> in the include source files in library QSYSINC should be used
|
|
when referencing these values.</p>
|
|
<a name="datatypecode"></a>
|
|
<table id="datatypecode" width="100%" summary="" border="1" frame="border" rules="all">
|
|
<caption>Table 57. SQL Data Type Codes and Lengths</caption>
|
|
<thead valign="bottom">
|
|
<tr>
|
|
<th id="wq1523" width="45%" align="left" valign="bottom">Data Type</th>
|
|
<th id="wq1524" width="18%" align="left" valign="bottom">Data Type Code</th>
|
|
<th id="wq1525" width="18%" align="left">Length</th>
|
|
<th id="wq1526" width="18%" align="left">Octet Length</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody valign="top">
|
|
<tr>
|
|
<td headers="wq1523">BIGINT</td>
|
|
<td headers="wq1524">25</td>
|
|
<td headers="wq1525">8</td>
|
|
<td headers="wq1526">8</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">BLOB(n)</td>
|
|
<td headers="wq1524">30</td>
|
|
<td headers="wq1525">n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">CHARACTER(n)</td>
|
|
<td headers="wq1524">1</td>
|
|
<td headers="wq1525">n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">VARCHAR(n)</td>
|
|
<td headers="wq1524">12</td>
|
|
<td headers="wq1525"><=n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">CLOB(n)</td>
|
|
<td headers="wq1524">40</td>
|
|
<td headers="wq1525"><=n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">DATALINK(n)</td>
|
|
<td headers="wq1524">70</td>
|
|
<td headers="wq1525"><=n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">DATE (DATETIME_INTERVAL_CODE = 1)</td>
|
|
<td headers="wq1524">9</td>
|
|
<td headers="wq1525">Length depends on date format</td>
|
|
<td headers="wq1526">Based on CCSID</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">TIME (DATETIME_INTERVAL_CODE = 2)</td>
|
|
<td headers="wq1524">9</td>
|
|
<td headers="wq1525">Length depends on time format</td>
|
|
<td headers="wq1526">Based on CCSID</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">TIMESTAMP (DATETIME_INTERVAL_CODE = 3)</td>
|
|
<td headers="wq1524">9</td>
|
|
<td headers="wq1525">26</td>
|
|
<td headers="wq1526">26 or 52 (based on CCSID)</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">DBCLOB(n)</td>
|
|
<td headers="wq1524">-350</td>
|
|
<td headers="wq1525"><=n</td>
|
|
<td headers="wq1526">2*n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">BINARY(n)</td>
|
|
<td headers="wq1524">–2</td>
|
|
<td headers="wq1525">n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">VARBINARY(n)</td>
|
|
<td headers="wq1524">–3</td>
|
|
<td headers="wq1525"><=n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">DECIMAL</td>
|
|
<td headers="wq1524">3</td>
|
|
<td headers="wq1525">(precision/2)+1</td>
|
|
<td headers="wq1526">(precision/2)+1</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">DOUBLE PRECISION</td>
|
|
<td headers="wq1524">8</td>
|
|
<td headers="wq1525">8</td>
|
|
<td headers="wq1526">8</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">FLOAT</td>
|
|
<td headers="wq1524">6</td>
|
|
<td headers="wq1525">8</td>
|
|
<td headers="wq1526">8</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">GRAPHIC(n)</td>
|
|
<td headers="wq1524">–95</td>
|
|
<td headers="wq1525">n</td>
|
|
<td headers="wq1526">2*n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">INTEGER</td>
|
|
<td headers="wq1524">4</td>
|
|
<td headers="wq1525">4</td>
|
|
<td headers="wq1526">4</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">NUMERIC(n)</td>
|
|
<td headers="wq1524">2</td>
|
|
<td headers="wq1525">n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">ZONED DECIMAL(n)</td>
|
|
<td headers="wq1524">2</td>
|
|
<td headers="wq1525">n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">REAL</td>
|
|
<td headers="wq1524">7</td>
|
|
<td headers="wq1525">4</td>
|
|
<td headers="wq1526">4</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">ROWID</td>
|
|
<td headers="wq1524">–904</td>
|
|
<td headers="wq1525">40</td>
|
|
<td headers="wq1526">40</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">SMALLINT</td>
|
|
<td headers="wq1524">5</td>
|
|
<td headers="wq1525">2</td>
|
|
<td headers="wq1526">2</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">VARGRAPHIC(n)</td>
|
|
<td headers="wq1524">–96</td>
|
|
<td headers="wq1525"><=n</td>
|
|
<td headers="wq1526">2*n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">C nul terminated GRAPHIC(n)</td>
|
|
<td headers="wq1524">–400®</td>
|
|
<td headers="wq1525"><=n</td>
|
|
<td headers="wq1526">2*n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">C nul terminated CHARACTER(n)</td>
|
|
<td headers="wq1524">1</td>
|
|
<td headers="wq1525"><=n</td>
|
|
<td headers="wq1526">n</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">BLOB File Reference Variable</td>
|
|
<td headers="wq1524">–916</td>
|
|
<td headers="wq1525">267</td>
|
|
<td headers="wq1526">267</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">CLOB File Reference Variable</td>
|
|
<td headers="wq1524">–920</td>
|
|
<td headers="wq1525">267</td>
|
|
<td headers="wq1526">267</td>
|
|
</tr>
|
|
<tr>
|
|
<td headers="wq1523">DBCLOB File Reference Variable</td>
|
|
<td headers="wq1524">–924</td>
|
|
<td headers="wq1525">267</td>
|
|
<td headers="wq1526">267</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<a name="wq1527"></a>
|
|
<h3 id="wq1527"><a href="rbafzmst02.htm#ToC_1094">Example</a></h3>
|
|
<p><span class="italic">Example 1:</span> Retrieve from the descriptor 'NEWDA'
|
|
the number of descriptor items.</p>
|
|
<a name="reffch"></a>
|
|
<pre id="reffch" class="xmp"> EXEC SQL <span class="bold">GET DESCRIPTOR</span> 'NEWDA'
|
|
:numitems <span class="bold">= COUNT;</span>
|
|
</pre>
|
|
<p><span class="italic">Example 2:</span> Retrieve from the first item descriptor
|
|
of descriptor 'NEWDA' the data type and the octet length.</p>
|
|
<pre class="xmp"> <span class="bold">GET DESCRIPTOR</span> 'NEWDA'
|
|
<span class="bold">VALUE</span> 1 :dtype <span class="bold">= TYPE</span>,
|
|
:olength <span class="bold">= OCTET_LENGTH;</span></pre><a id="idx2664" name="idx2664"></a><a id="idx2665" name="idx2665"></a><a id="idx2666" name="idx2666"></a><a id="idx2667" name="idx2667"></a>
|
|
<hr /><br />
|
|
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