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107 lines
3.2 KiB
107 lines
3.2 KiB
13 years ago
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/****************************************************************************
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include <qapplication.h>
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#include <qsqldatabase.h>
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#include <qsqlquery.h>
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#include <qsqlcursor.h>
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#include <qfile.h>
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#define DRIVER "TQPSQL7" /* see the TQt SQL documentation for a list of available drivers */
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#define DATABASE "" /* the name of your database */
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#define USER "" /* user name with appropriate rights */
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#define PASSWORD "" /* password for USER */
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#define HOST "" /* host on which the database is running */
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int main( int argc, char ** argv )
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{
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TQApplication a( argc, argv, FALSE );
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TQSqlDatabase * db = TQSqlDatabase::addDatabase( DRIVER );
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db->setDatabaseName( DATABASE );
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db->setUserName( USER );
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db->setPassword( PASSWORD );
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db->setHostName( HOST );
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if ( !db->open() ) {
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qWarning( db->lastError().databaseText() );
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return 1;
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}
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if ( argc < 2 ) {
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qWarning( "Usage: %s <filename>", argv[0] );
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return 1;
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}
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// read a file which we want to insert into the database
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TQFile f( argv[1] );
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if ( !f.open( IO_ReadOnly ) ) {
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qWarning( "Unable to open data file '%s' - exiting", argv[1] );
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return 1;
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}
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TQByteArray binaryData = f.readAll();
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qWarning( "Data size: %d", binaryData.size() );
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// create a table with a binary field
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TQSqlQuery q;
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if ( !q.exec( "CREATE TABLE blobexample ( id INT PRIMARY KEY, binfield LONGBLOB )" ) ) {
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qWarning( "Unable to create table - exiting" );
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return 1;
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}
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// insert a BLOB into the table
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if ( !q.prepare( "INSERT INTO blobexample ( id, binfield ) VALUES ( ?, ? )" ) ) {
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qWarning( "Unable to prepare query - exiting" );
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return 1;
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}
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q.bindValue( 0, 1 );
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q.bindValue( 1, binaryData );
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if ( !q.exec() ) {
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qWarning( "Unable to execute prepared query - exiting" );
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return 1;
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}
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// read the BLOB back from the database
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if ( !q.exec( "SELECT id, binfield FROM blobexample" ) ) {
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qWarning( "Unable to execute query - exiting" );
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return 1;
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}
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qWarning( "\nTQSqlQuery:" );
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while ( q.next() ) {
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qWarning( "BLOB id: %d", q.value( 0 ).toInt() );
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qWarning( "BLOB size: %d", q.value( 1 ).toByteArray().size() );
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}
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// write another BLOB using TQSqlCursor
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TQSqlCursor cur( "blobexample" );
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TQSqlRecord * r = cur.primeInsert();
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r->setValue( "id", 2 );
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r->setValue( "binfield", binaryData );
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if ( !cur.insert() ) {
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qWarning( "Unable to insert BLOB using TQSqlCursor - exiting" );
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return 1;
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}
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// read the BLOBs back using TQSqlCursor
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if ( !cur.select() ) {
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qWarning( "Unable retrieve blobexample table using TQSqlCursor - exiting" );
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return 1;
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}
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qWarning( "\nTQSqlCursor:" );
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while ( cur.next() ) {
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qWarning( "BLOB id: %d", cur.value( "id" ).toInt() );
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qWarning( "BLOB size: %d", cur.value( "binfield" ).toByteArray().size() );
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}
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if ( !q.exec( "DROP TABLE blobexample" ) ) {
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qWarning( "Unable to drop table - exiting" );
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return 1;
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}
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return 0;
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}
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