50 lines
3.9 KiB
HTML
50 lines
3.9 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html 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="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="DC.Type" content="reference" />
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<meta name="DC.Title" content="Indicator variables and LOB locators" />
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<meta name="abstract" content="For normal host variables in an application program, when selecting a NULL value into a host variable, a negative value is assigned to the indicator variable signifying that the value is NULL. In the case of LOB locators, however, the meaning of indicator variables is slightly different." />
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<meta name="description" content="For normal host variables in an application program, when selecting a NULL value into a host variable, a negative value is assigned to the indicator variable signifying that the value is NULL. In the case of LOB locators, however, the meaning of indicator variables is slightly different." />
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<meta name="DC.subject" content="LOBs (Large Objects), locators, indicator variables, indicator variables, and LOB locators" />
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<meta name="keywords" content="LOBs (Large Objects), locators, indicator variables, indicator variables, and LOB locators" />
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<meta name="DC.Relation" scheme="URI" content="rbafylobs.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rbafydeflobe" />
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<meta name="DC.Language" content="en-us" />
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Indicator variables and LOB locators</title>
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</head>
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<body id="rbafydeflobe"><a name="rbafydeflobe"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Indicator variables and LOB locators</h1>
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<div><p>For normal host variables in an application program, when selecting
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a NULL value into a host variable, a negative value is assigned to the indicator
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variable signifying that the value is NULL. In the case of LOB locators, however,
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the meaning of indicator variables is slightly different.</p>
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<div class="section"><p>Since a locator host variable itself can never be NULL, a negative
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indicator variable value indicates that the LOB value represented by the LOB
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locator is NULL. The NULL information is kept local to the client using the
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indicator variable value. The server does not track NULL values
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with valid locators.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafylobs.htm" title="The VARCHAR, VARGRAPHIC, and VARBINARY data types have a limit of 32 KB (where KB equals 1024 bytes) of storage. While this may be sufficient for small to medium-size text data, applications often need to store large text documents. They might also need to store a wide variety of additional data types such as audio, video, drawings, mixed text and graphics, and images. There are three data types to store these data objects as strings of up to 2 GB (where GB equals 1 073 741 824 bytes).">Use large objects (LOBs)</a></div>
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</div>
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</div>
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</body>
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</html>
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