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|
/*********************************************************************
*
* unixODBC Cursor Library
*
* Created by Nick Gorham
* (nick@easysoft.com).
*
* copyright (c) 1999 Nick Gorham
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
**********************************************************************
*
* $Id: SQLGetData.c,v 1.2 2001/12/13 13:00:33 lurcher Exp $
*
* $Log: SQLGetData.c,v $
* Revision 1.2 2001/12/13 13:00:33 lurcher
*
* Remove most if not all warnings on 64 bit platforms
* Add support for new MS 3.52 64 bit changes
* Add override to disable the stopping of tracing
* Add MAX_ROWS support in postgres driver
*
* Revision 1.1.1.1 2001/10/17 16:40:15 lurcher
*
* First upload to SourceForge
*
* Revision 1.2 2001/03/28 14:57:22 nick
*
* Fix bugs in corsor lib introduced bu UNCODE and other changes
*
* Revision 1.1.1.1 2000/09/04 16:42:52 nick
* Imported Sources
*
* Revision 1.1 1999/09/19 22:22:50 ngorham
*
*
* Added first cursor library work, read only at the moment and only works
* with selects with no where clause
*
*
**********************************************************************/
#include "cursorlibrary.h"
SQLRETURN CLGetData( SQLHSTMT statement_handle,
SQLUSMALLINT column_number,
SQLSMALLINT target_type,
SQLPOINTER target_value,
SQLINTEGER buffer_length,
SQLINTEGER *strlen_or_ind )
{
CLHSTMT cl_statement = (CLHSTMT) statement_handle;
CLHDBC cl_connection = cl_statement -> cl_connection;
SQLHANDLE hstmt;
SQLRETURN ret;
SQLCHAR sql[ 4095 ];
CLBCOL *bound_columns;
int i;
if ( cl_statement -> not_from_select )
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_SL004, NULL,
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
return SQL_ERROR;
}
/*
* check we have what we need
*/
if ( !CHECK_SQLBINDPARAM( cl_connection ) &&
!CHECK_SQLBINDPARAMETER( cl_connection ))
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_S1000, "Driver can not bind parameters",
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
return SQL_ERROR;
}
if ( !CHECK_SQLEXECDIRECT( cl_connection ) &&
!( CHECK_SQLPREPARE( cl_connection ) &&
CHECK_SQLEXECUTE( cl_connection )))
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_S1000, "Driver can not prepare or execute",
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
return SQL_ERROR;
}
if ( !CHECK_SQLFETCH( cl_connection ))
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_S1000, "Driver can not fetch",
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
return SQL_ERROR;
}
if ( !CHECK_SQLGETDATA( cl_connection ))
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_S1000, "Driver can not getdata",
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
return SQL_ERROR;
}
/*
* if it's not and closed resultset, and the driver
* can only support one active statement, then close
* the result set first
*/
if ( !cl_statement -> rowset_complete &&
cl_statement -> cl_connection -> active_statement_allowed == 1 )
{
int sav_start, sav_pos;
sav_start = cl_statement -> curr_rowset_start;
sav_pos = cl_statement -> rowset_position;
complete_rowset( cl_statement, 0 );
SQLFREESTMT( cl_connection,
cl_statement -> driver_stmt,
SQL_DROP );
cl_statement -> driver_stmt_closed = 1;
/*
* restore the position
*/
cl_statement -> curr_rowset_start = sav_start;
cl_statement -> rowset_position = sav_pos;
}
/*
* refresh the data
*/
ret = fetch_row( cl_statement,
cl_statement -> curr_rowset_start +
cl_statement -> cursor_pos - 1,
-1 );
ret = SQLALLOCSTMT( cl_connection,
cl_connection -> driver_dbc,
&hstmt,
NULL );
if ( !SQL_SUCCEEDED( ret ))
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_S1000, "SQLAllocStmt failed in driver",
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
return SQL_ERROR;
}
/*
* append the cryterior to the end of the statement, binding
* the comumns while we are at it
*/
strcpy((char*) sql, cl_statement -> sql_text );
/*
* assume for the moment that the selent has no WHERE
*/
strcat((char*) sql, " WHERE" );
/*
* this works because the bound list is in column order
*/
bound_columns = cl_statement -> bound_columns;
for ( i = 0; i < cl_statement -> column_count; i ++ )
{
char addon[ 256 ];
sprintf( addon, " %s = ?", cl_statement -> column_names[ i ] );
if ( i > 0 )
{
strcat((char*) sql, " AND" );
}
strcat((char*) sql, addon );
if ( CHECK_SQLBINDPARAMETER( cl_connection ))
{
ret = SQLBINDPARAMETER( cl_connection,
hstmt,
i + 1,
SQL_PARAM_INPUT,
bound_columns -> bound_type,
cl_statement -> data_type[ i ],
cl_statement -> column_size[ i ],
cl_statement -> decimal_digits[ i ],
bound_columns -> local_buffer,
bound_columns -> bound_length,
&bound_columns -> len_ind );
}
else
{
ret = SQLBINDPARAM( cl_connection,
hstmt,
i + 1,
bound_columns -> bound_type,
cl_statement -> data_type[ i ],
cl_statement -> column_size[ i ],
cl_statement -> decimal_digits[ i ],
bound_columns -> local_buffer,
&bound_columns -> len_ind );
}
if ( !SQL_SUCCEEDED( ret ))
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_SL010, NULL,
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
SQLFREESTMT( cl_connection,
hstmt,
SQL_DROP );
return SQL_ERROR;
}
bound_columns = bound_columns -> next;
}
if ( CHECK_SQLEXECDIRECT( cl_connection ))
{
ret = SQLEXECDIRECT( cl_connection,
hstmt,
sql,
strlen((char*) sql ));
}
else
{
ret = SQLPREPARE( cl_connection,
hstmt,
sql,
strlen((char*) sql ));
if ( SQL_SUCCEEDED( ret ))
{
ret = SQLEXECUTE( cl_connection,
hstmt );
}
}
if ( !SQL_SUCCEEDED( ret ))
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_SL010, NULL,
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
SQLFREESTMT( cl_connection,
hstmt,
SQL_DROP );
return SQL_ERROR;
}
ret = SQLFETCH( cl_connection,
hstmt );
if ( !SQL_SUCCEEDED( ret ))
{
__post_internal_error( &cl_statement -> dm_statement -> error,
ERROR_SL010, NULL,
cl_statement -> dm_statement -> connection ->
environment -> requested_version );
SQLFREESTMT( cl_connection,
hstmt,
SQL_DROP );
return SQL_ERROR;
}
ret = SQLGETDATA( cl_connection,
hstmt,
column_number,
target_type,
target_value,
buffer_length,
strlen_or_ind );
if ( !SQL_SUCCEEDED( ret ))
{
SQLCHAR sqlstate[ 6 ];
SQLINTEGER native_error, ind;
SQLCHAR message_text[ SQL_MAX_MESSAGE_LENGTH + 1 ];
SQLRETURN ret;
/*
* get the error from the driver before
* loseing the connection
*/
do
{
ret = SQLERROR( cl_connection,
SQL_NULL_HENV,
SQL_NULL_HSTMT,
hstmt,
sqlstate,
&native_error,
message_text,
sizeof( message_text ),
&ind );
__post_internal_error_ex( &cl_statement -> dm_statement -> error,
sqlstate, native_error, message_text );
}
while ( SQL_SUCCEEDED( ret ));
}
SQLFREESTMT( cl_connection,
hstmt,
SQL_DROP );
return ret;
}
|
