90 lines
4.0 KiB
HTML
90 lines
4.0 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="Example: Use the BLOB data type" />
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<meta name="DC.Relation" scheme="URI" content="rzaikodbclobdatalink.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1999, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaikblobex" />
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<meta name="DC.Language" 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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<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>Example: Use the BLOB data type</title>
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</head>
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<body id="rzaikblobex"><a name="rzaikblobex"><!-- --></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">Example: Use the BLOB data type</h1>
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<div><div class="section"><div class="p">The following is a partial C program that uses the BLOB data type: <pre>BOOL params = TRUE; // TRUE if you want to use parameter markers
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SQLINTEGER char_len = 10, blob_len = 400;
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SQLCHAR szCol1[21], szCol2[400], szRecCol1[21], szRecCol2[400];
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SQLINTEGER cbCol1, cbCol2;
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SQLCHAR stmt[2048];
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// Create a table with a CHAR field and a BLOB field
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rc = SQLExecDirect(hstmt, "CREATE TABLE TABBLOB(COL1 CHAR(10), COL2 BLOB(400))", SQL_NTS);
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strcpy(szCol1, "1234567890");
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if (!params) // no parameter markers
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{
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strcpy(szCol2, "414243444546"); // 0x41 = 'A', 0x42 = 'B', 0x43 = 'C', ...
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wsprintf(stmt, "INSERT INTO TABBLOB VALUES('%s', BLOB(x'%s'))", szCol1, szCol2);
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}
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else
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{
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strcpy(szCol2, "ABCDEF"); // 'A' = 0x41, 'B' = 0x42, 'C' = 0x43, ...
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strcpy(stmt, "INSERT INTO TABBLOB VALUES(?,?)");
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}
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// Prepare the 'Insert' statement
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rc = SQLPrepare(hstmt, stmt, SQL_NTS);
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// Bind the parameter markers
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if (params) // using parameter markers
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{
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cbCol1 = char_len;
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rc = SQLBindParameter(hstmt, 1, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR,
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char_len, 0, szCol1, char_len + 1, &cbCol1);
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cbCol2 = 6;
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rc = SQLBindParameter(hstmt, 2, SQL_PARAM_INPUT, SQL_C_BINARY, SQL_LONGVARBINARY,
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blob_len, 0, szCol2, blob_len, &cbCol2);
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}
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// Execute the 'Insert' statement to put a row of data into the table
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rc = SQLExecute(hstmt);
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// Prepare and Execute a 'Select' statement
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rc = SQLExecDirect(hstmt, "SELECT * FROM TABBLOB", SQL_NTS);
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// Bind the columns
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rc = SQLBindCol(hstmt, 1, SQL_C_CHAR, szRecCol1, char_len + 1, &cbCol1);
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rc = SQLBindCol(hstmt, 2, SQL_C_BINARY, szRecCol2, blob_len, &cbCol2);
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// Fetch the first row
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rc = SQLFetch(hstmt);
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szRecCol2[cbCol2] = '\0';
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// At this point szRecCol1 should contain the data "1234567890"
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// szRecCol2 should contain the data 0x414243444546 or "ABCDEF"</pre>
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</div>
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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="rzaikodbclobdatalink.htm" title="Use LOBs with iSeries Access for Windows ODBC to store and access large text documents.">Large objects (LOBs) considerations</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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