82 lines
5.0 KiB
HTML
82 lines
5.0 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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<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="keywords" content="creating, procedure,
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choosing parameter data types, locators, signature, specific name" />
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<title>CREATE PROCEDURE</title>
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<a name="createp"></a>
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<h2 id="createp"><a href="rbafzmst02.htm#ToC_895">CREATE PROCEDURE</a></h2><a id="idx1912" name="idx1912"></a>
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<p></p>
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<p>The CREATE PROCEDURE statement defines a procedure at the current server.</p>
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<p>The following types of procedures can be defined:</p>
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<ul>
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<li>External
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<p>The procedure program or service program is written
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in a programming language such as C, COBOL, or Java™. The external executable is referenced
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by a procedure defined at the current server along with various attributes
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of the procedure. See <a href="rbafzmstcrtpef.htm#crtpef">CREATE PROCEDURE (External)</a>.</p></li>
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<li>SQL
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<p>The procedure is written exclusively in SQL. The procedure body
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is defined at the current server along with various attributes of the procedure.
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See <a href="rbafzmstcrtpsf.htm#crtpsf">CREATE PROCEDURE (SQL)</a>.</p></li></ul>
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<a name="wq1256"></a>
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<h3 id="wq1256"><a href="rbafzmst02.htm#ToC_896">Notes</a></h3>
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<p><span class="bold">Choosing data types for parameters:</span> <a id="idx1913" name="idx1913"></a>For portability of procedures across platforms that are not DB2 UDB for iSeries, do
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not use the following data types, which might have different representations
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on different platforms: </p>
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<ul>
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<li>FLOAT. Use DOUBLE or REAL instead.</li>
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<li>NUMERIC. Use DECIMAL instead.</li></ul>
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<p><span class="bold">Specifying AS LOCATOR for a parameter:</span> <a id="idx1914" name="idx1914"></a>Passing a locator
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instead of a value can result in fewer bytes being passed in or out of the
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procedure. This can be useful when the value of the parameter is very large.
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The AS LOCATOR clause specifies that a locator to the value of the parameter
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is passed instead of the actual value. Specify AS LOCATOR only for parameters
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with a LOB data type or a distinct type based on a LOB data type.</p>
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<p>AS LOCATOR cannot be specified for SQL procedures.</p>
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<p><span class="bold">Determining the uniqueness of procedures in
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a schema:</span> <a id="idx1915" name="idx1915"></a>At the current server, each procedure signature must be unique.
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The signature of a procedure is the qualified procedure name combined with
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the number of the parameters (the data types of the parameters are not part
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of a procedure's signature). This means that two different schemas can each
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contain a procedure with the same name that have the same number of parameters.
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However, a schema must not contain two procedures with the same name that
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have the same number of parameters.</p>
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<p><span class="bold">The specific name for a procedure:</span> <a id="idx1916" name="idx1916"></a>When defining
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multiple procedures with the same name and schema (with different number of
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parameters), it is recommended that a specific name also be specified. The
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specific name can be used to uniquely identify the procedure when dropping,
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granting to, revoking from, or commenting on the procedure.</p>
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<p>If the SPECIFIC clause is not specified, a specific name is generated.</p>
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<p><span class="bold">Special registers in procedures:</span> The settings of
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the special registers of the invoker are inherited by the procedure when called
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and restored upon return to the invoker.</p>
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<hr /><br />
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[ <a href="#Top_Of_Page">Top of Page</a> | <a href="rbafzmstxcindx.htm">Previous Page</a> | <a href="rbafzmstcrtpef.htm">Next Page</a> | <a href="rbafzmst02.htm#wq1">Contents</a> |
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