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/********************************************************************
* SQLStatistics
*
**********************************************************************
*
* 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 <config.h>
#include "driver.h"
enum nSQLStatistics
{
TABLE_CAT = 1,
TABLE_SCHEM,
TABLE_NAME,
NON_UNIQUE,
INDEX_QUALIFIER,
INDEX_NAME,
TYPE,
ORDINAL_POSITION,
COLUMN_NAME,
ASC_OR_DESC,
CARDINALITY,
PAGES,
FILTER_CONDITION,
COL_MAX
};
m_field aSQLStatistics[] =
{
"", "", 0, 0, 0,
"TABLE_CAT", "sys", CHAR_TYPE, 50, 0,
"TABLE_SCHEM", "sys", CHAR_TYPE, 50, 0,
"TABLE_NAME", "sys", CHAR_TYPE, 50, 0,
"NON_UNIQUE", "sys", INT_TYPE, 3, 0,
"INDEX_QUALIFIER", "sys", CHAR_TYPE, 50, 0,
"INDEX_NAME", "sys", CHAR_TYPE, 50, 0,
"TYPE", "sys", INT_TYPE, 3, 0,
"ORDINAL_POSITION", "sys", CHAR_TYPE, 50, 0,
"COLUMN_NAME", "sys", CHAR_TYPE, 50, 0,
"ASC_OR_DESC", "sys", INT_TYPE, 3, 0,
"CARDINALITY", "sys", INT_TYPE, 3, 0,
"PAGES", "sys", INT_TYPE, 3, 0,
"FILTER_CONDITION", "sys", CHAR_TYPE, 50, 0
};
SQLRETURN SQLStatistics( SQLHSTMT hDrvStmt,
SQLCHAR *szCatalogName,
SQLSMALLINT nCatalogNameLength,
SQLCHAR *szSchemaName,
SQLSMALLINT nSchemaNameLength,
SQLCHAR *szTableName, /* MUST BE SUPPLIED */
SQLSMALLINT nTableNameLength,
SQLUSMALLINT nTypeOfIndex,
SQLUSMALLINT nReserved )
{
HDRVSTMT hStmt = (HDRVSTMT)hDrvStmt;
m_result *pResults; /* mSQL DATA */
m_field *pField; /* mSQL field */
COLUMNHDR *pColumnHeader;
int nColumn;
long nCols;
long nCurRow;
long nRow;
char szBuffer[101];
int nIndexColumns = 0;
int nNormalColumns = 0;
/* SANITY CHECKS */
if( hStmt == SQL_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 ( szTableName == NULL )
{
logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING, "SQL_ERROR No table name" );
return SQL_ERROR;
}
if ( szTableName[0] == '\0' )
{
logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING, "SQL_ERROR No table name" );
return SQL_ERROR;
}
/**************************
* close any existing result
**************************/
if ( hStmt->hStmtExtras->aResults )
_FreeResults( hStmt->hStmtExtras );
if ( hStmt->pszQuery != NULL )
free( hStmt->pszQuery );
hStmt->pszQuery = NULL;
/************************
* generate a result set listing columns (these will be our rows)
************************/
pResults = msqlListFields( ((HDRVDBC)hStmt->hDbc)->hDbcExtras->hServer, szTableName );
if ( pResults == NULL )
{
sprintf( hStmt->szSqlMsg, "SQL_ERROR Query failed. %s", msqlErrMsg );
logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING, hStmt->szSqlMsg );
return SQL_ERROR;
}
/************************
* how many columns are indexs?
************************/
nIndexColumns = 0;
while ( pField = msqlFetchField( pResults ) )
{
if ( pField->type == IDX_TYPE)
nIndexColumns++;
}
msqlFieldSeek( pResults, 0 );
nNormalColumns = msqlNumFields( pResults ) - nIndexColumns;
/**************************
* allocate memory for columns headers and result data (row 0 is column header while col 0 is reserved for bookmarks)
**************************/
hStmt->hStmtExtras->nCols = COL_MAX-1;
hStmt->hStmtExtras->nRows = nIndexColumns;
hStmt->hStmtExtras->nRow = 0;
hStmt->hStmtExtras->aResults = malloc( sizeof(char*) * (hStmt->hStmtExtras->nRows+1) * (hStmt->hStmtExtras->nCols+1) );
memset( hStmt->hStmtExtras->aResults, 0, 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;
}
/**************************
* gather column header information (save col 0 for bookmarks)
**************************/
for ( nColumn = 1; nColumn < COL_MAX; nColumn++ )
{
(hStmt->hStmtExtras->aResults)[nColumn] = malloc( sizeof(COLUMNHDR) );
pColumnHeader = (COLUMNHDR*)(hStmt->hStmtExtras->aResults)[nColumn];
memset( pColumnHeader, 0, sizeof(COLUMNHDR) );
_NativeToSQLColumnHeader( pColumnHeader, &(aSQLStatistics[nColumn]) );
}
/************************
* gather data (save col 0 for bookmarks and factor out normal columns)
************************/
nCols = hStmt->hStmtExtras->nCols;
hStmt->hStmtExtras->nRow = 0;
for ( nCurRow = 1; nCurRow <= msqlNumFields( pResults ); nCurRow++ )
{
pField = msqlFetchField( pResults );
if ( pField->type == IDX_TYPE)
{
hStmt->hStmtExtras->nRow++;
nRow = hStmt->hStmtExtras->nRow;
for ( nColumn = 1; nColumn < COL_MAX; nColumn++ )
{
switch ( nColumn )
{
case TABLE_NAME:
(hStmt->hStmtExtras->aResults)[nRow*nCols+nColumn] = (char*)strdup( szTableName );
break;
case INDEX_NAME:
(hStmt->hStmtExtras->aResults)[nRow*nCols+nColumn] = (char*)strdup( pField->name );
break;
case NON_UNIQUE:
(hStmt->hStmtExtras->aResults)[nRow*nCols+nColumn] = (char *)strdup( IS_NOT_NULL( pField->flags ) ? "0" : "1" );
break;
default:
(hStmt->hStmtExtras->aResults)[nRow*nCols+nColumn] = NULL;
} /* switch nColumn */
} /* for nColumn */
} /* if */
} /* for nRow */
hStmt->hStmtExtras->nRow = 0;
/**************************
* free the snapshot
**************************/
msqlFreeResult( pResults );
logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_INFO, LOG_INFO, "SQL_SUCCESS" );
return SQL_SUCCESS;
}
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