77 lines
4.7 KiB
HTML
77 lines
4.7 KiB
HTML
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="SQL graphic strings" />
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<meta name="abstract" content="A graphic string is a sequence of double-byte characters that do not include shift-out or shift-in characters." />
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<meta name="description" content="A graphic string is a sequence of double-byte characters that do not include shift-out or shift-in characters." />
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<title>SQL graphic strings</title>
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</head>
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<body id="rbagssqlgraphstrngcons"><a name="rbagssqlgraphstrngcons"><!-- --></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">SQL graphic strings</h1>
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<div><p>A graphic string is a sequence of double-byte characters that do
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not include shift-out or shift-in characters.</p>
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<p>The length of the string is the number of its characters. Like character
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strings, graphic strings can be empty.</p>
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<p>Every graphic string has a CCSID that identifies a double-byte coded character
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set. If necessary, a graphic string is converted before it is used in an operation
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with a graphic string that has a different CCSID.</p>
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<div class="section"><h4 class="sectiontitle">SQL fixed-length and double-byte characters</h4><p>All
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values of a fixed-length graphic-string column have the same length, which
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is determined by the length attribute of the column. The length attribute
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must be between 1 through 16383 inclusive.</p>
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</div>
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<div class="section"><h4 class="sectiontitle">SQL graphic-string constants</h4><p>A graphic-string constant
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is a varying-length graphic string. The length of the specified string cannot
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be greater than 16370.</p>
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<p>In the normal form, the SQL delimiters and the
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G or the N are SBCS characters. The SBCS apostrophe (') is the EBCDIC apostrophe,
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X'7D'.</p>
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<p>In the PL/I form, the apostrophes and the G are DBCS characters.
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Two consecutive DBCS string delimiters are used to represent one string delimiter
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within the string. Notice that this PL/I form is only valid for static statements
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embedded in PL/I programs.</p>
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<p>A hexadecimal graphic constant is also supported.
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The form of the hexadecimal graphic constant is:</p>
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<pre>GX'ssss'</pre>
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<p>In
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the constant, <span class="uicontrol">ssss</span> represents a string from 0 to 32766
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hexadecimal digits. The number of characters between the string delimiters
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must be an even multiple of 4. Each group of 4 digits represents a single
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graphic character. The hexadecimal for shift-in and shift-out (X'0E' and X'0F')
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are not included in the string.</p>
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<p>The CCSID assigned to constants is the
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DBCS CCSID associated with the CCSID of the source unless the source is encoded
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in a foreign encoding scheme (such as ASCII). In this case, the CCSID assigned
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to the constant is the DBCS CCSID associated with the default CCSID of the
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application server when the SQL statement containing the constant is prepared.
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If there is no DBCS CCSID associated with the CCSID of the source, the CCSID
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is 65535.</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="rbagssqlanddbchars.htm" title="The basic symbols of keywords and operators in the SQL language are single-byte characters that are part of all character sets supported by the IBM relational database products. Characters of the language are classified as letters, digits, or special characters.">SQL and DBCS</a></div>
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