File: _Execute.c

package info (click to toggle)
unixodbc 2.2.11-16
  • links: PTS
  • area: main
  • in suites: lenny
  • size: 17,332 kB
  • ctags: 12,399
  • sloc: ansic: 116,624; cpp: 29,333; sh: 25,024; makefile: 3,002; lex: 241; yacc: 182; perl: 142; sed: 16; sql: 1
file content (118 lines) | stat: -rw-r--r-- 4,211 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
/**********************************************************************
 * SQLExecute
 *
 **********************************************************************
 *
 * This code was created by Peter Harvey (mostly during Christmas 98/99).
 * This code is LGPL. Please ensure that this message remains in future
 * distributions and uses of this code (thats about all I get out of it).
 * - Peter Harvey pharvey@codebydesign.com
 *
 **********************************************************************/

#include "driver.h"

SQLRETURN _Execute( SQLHSTMT  hDrvStmt )
{
    HDRVSTMT hStmt	= (HDRVSTMT)hDrvStmt;
	int				nColumn;
	int				nCols;
	int				nRow;
    m_result    	*pResults;						/* mSQL DATA	*/
    m_row       	rowResult;						/* mSQL ROW		*/
    m_field     	*pField;						/* mSQL COL HDR	*/
	COLUMNHDR		*pColumnHeader;			

	/* SANITY CHECKS */
    if( NULL == hStmt )
        return SQL_INVALID_HANDLE;

	sprintf( hStmt->szSqlMsg, "hStmt = $%08lX", hStmt );
    logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING, hStmt->szSqlMsg );

    if( hStmt->pszQuery == NULL )
    {
		logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING, "SQL_ERROR No prepared statement" );
        return SQL_ERROR;
    }

    /**************************
	 * Free any current results
     **************************/
	if ( hStmt->hStmtExtras->aResults )
		_FreeResults( hStmt->hStmtExtras );

    /**************************
	 * send prepared query to server
     **************************/
    if ( (hStmt->hStmtExtras->nRows = msqlQuery( ((HDRVDBC)hStmt->hDbc)->hDbcExtras->hServer, hStmt->pszQuery )) == -1 )
    {
        sprintf( hStmt->szSqlMsg, "SQL_ERROR Query failed. %s", msqlErrMsg );
		logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING, hStmt->szSqlMsg );
        return SQL_ERROR;
    }

    /**************************
	 * snapshot our results (assume no results means UPDATE, DELETE or INSERT
     **************************/
    pResults = msqlStoreResult();
    if ( !pResults )
        return SQL_SUCCESS;

    /**************************
	 * allocate memory for columns headers and result data (row 0 is column header while col 0 is reserved for bookmarks)
     **************************/
    hStmt->hStmtExtras->nRows		= msqlNumRows( pResults );
    hStmt->hStmtExtras->nCols 		= msqlNumFields( pResults );
	hStmt->hStmtExtras->aResults 	=  malloc( sizeof(char*) * (hStmt->hStmtExtras->nRows+1) * (hStmt->hStmtExtras->nCols+1) );
	if ( hStmt->hStmtExtras->aResults == NULL )
	{
		logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING, "Not enough memory. (malloc failed)" );
        hStmt->hStmtExtras->nRows = 0;
        hStmt->hStmtExtras->nCols = 0;	
		msqlFreeResult( pResults );
        return SQL_ERROR;
	}
	memset( hStmt->hStmtExtras->aResults, 0, sizeof(char*) * (hStmt->hStmtExtras->nRows+1) * (hStmt->hStmtExtras->nCols+1) );

    /**************************
	 * gather column header information (save col 0 for bookmarks)
     **************************/
	for ( nColumn = 1; nColumn <= hStmt->hStmtExtras->nCols; nColumn++ )
	{
		pField = msqlFetchField( pResults );
        (hStmt->hStmtExtras->aResults)[nColumn] = malloc( sizeof(COLUMNHDR) );
		memset( (hStmt->hStmtExtras->aResults)[nColumn], 0, sizeof(COLUMNHDR) );
        pColumnHeader = (COLUMNHDR*)(hStmt->hStmtExtras->aResults)[nColumn];
		_NativeToSQLColumnHeader( pColumnHeader, pField  );
	}

	/************************
	 * gather data (save col 0 for bookmarks)
	 ************************/
	nCols 	= hStmt->hStmtExtras->nCols;
	nRow	= 0;
    while ( (rowResult = msqlFetchRow( pResults )) != NULL )
	{
        nRow++;
		msqlFieldSeek( pResults, 0 );
		for ( nColumn=1; nColumn <= nCols; nColumn++ )
		{
			if ( rowResult[nColumn-1] )
				(hStmt->hStmtExtras->aResults)[nRow*nCols+nColumn] = (char *)strdup( rowResult[nColumn-1] );
		}
	}
	hStmt->hStmtExtras->nRow = 0;

    /**************************
	 * free the snapshot
     **************************/
	msqlFreeResult( pResults );

    logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_INFO, LOG_INFO, "SQL_SUCCESS" );
    return SQL_SUCCESS;
}