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/********************************************************************
* SQLColumns
*
* This is something of a mess. Part of the problem here is that msqlListFields
* are returned as mSQL 'column headers'... we want them to be returned as a
* row for each. So we have to turn the results on their side <groan>.
*
* Another problem is that msqlListFields will also return indexs. So we have
* to make sure that these are not included here.
*
* The end result is more code than what would usually be found here.
*
**********************************************************************
*
* 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"
enum nSQLColumns
{
TABLE_CAT = 1,
TABLE_SCHEM,
TABLE_NAME,
COLUMN_NAME,
DATA_TYPE,
TYPE_NAME,
COLUMN_SIZE,
BUFFER_LENGTH,
DECIMAL_DIGITS,
NUM_PREC_RADIX,
NULLABLE,
REMARKS,
COLUMN_DEF,
SQL_DATA_TYPE,
SQL_DATETIME_SUB,
CHAR_OCTET_LENGTH,
ORDINAL_POSITION,
IS_NULLABLE,
COL_MAX
};
/****************************
* replace this with init of some struct (see same func for MiniSQL driver) */
char *aSQLColumns[] =
{
"one",
"two"
};
/***************************/
SQLRETURN SQLColumns( SQLHSTMT hDrvStmt,
SQLCHAR *szCatalogName,
SQLSMALLINT nCatalogNameLength,
SQLCHAR *szSchemaName,
SQLSMALLINT nSchemaNameLength,
SQLCHAR *szTableName,
SQLSMALLINT nTableNameLength,
SQLCHAR *szColumnName,
SQLSMALLINT nColumnNameLength )
{
HDRVSTMT hStmt = (HDRVSTMT)hDrvStmt;
COLUMNHDR *pColumnHeader;
int nColumn;
long nCols;
long nRow;
char szBuffer[101];
/* SANITY CHECKS */
if( NULL == hStmt )
return SQL_INVALID_HANDLE;
sprintf((char*) hStmt->szSqlMsg, "hStmt = $%08lX", hStmt );
logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING,(char*) hStmt->szSqlMsg );
if ( szTableName == NULL || szTableName[0] == '\0' )
{
logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_WARNING, LOG_WARNING, "SQL_ERROR Must supply a valid table name" );
return SQL_ERROR;
}
/**************************
* close any existing result
**************************/
if ( hStmt->hStmtExtras->aResults )
_FreeResults( hStmt->hStmtExtras );
if ( hStmt->pszQuery != NULL )
free( hStmt->pszQuery );
/************************
* generate a result set listing columns
************************/
/**************************
* allocate memory for columns headers and result data (row 0 is column header while col 0 is reserved for bookmarks)
**************************/
/**************************
* gather column header information (save col 0 for bookmarks)
**************************/
/************************
* gather data (save col 0 for bookmarks and factor out index columns)
************************/
/**************************
* free the snapshot
**************************/
logPushMsg( hStmt->hLog, __FILE__, __FILE__, __LINE__, LOG_INFO, LOG_INFO, "SQL_SUCCESS" );
return SQL_SUCCESS;
}
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