options.c

/* Module:          options.c
 *
 * Description:     This module contains routines for getting/setting
 *                  connection and statement options.
 *
 * Classes:         n/a
 *
 * API functions:   SQLSetConnectOption, SQLSetStmtOption, SQLGetConnectOption,
 *                  SQLGetStmtOption
 *
 * Comments:        See "notice.txt" for copyright and license information.
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "psqlodbc.h"

#ifndef WIN32
#include "iodbc.h"
#include "isql.h"
#include "isqlext.h"
#else
#include <windows.h>
#include <sql.h>
#include <sqlext.h>
#endif

#include "environ.h"
#include "connection.h"
#include "statement.h"
#include "qresult.h"


extern GLOBAL_VALUES globals;

RETCODE set_statement_option(ConnectionClass *conn, 
							 StatementClass *stmt, 
							 UWORD   fOption,
							 UDWORD  vParam);



RETCODE set_statement_option(ConnectionClass *conn, 
							 StatementClass *stmt, 
							 UWORD   fOption,
							 UDWORD  vParam)
{
static char *func="set_statement_option";
char changed = FALSE;


	switch(fOption) {
	case SQL_ASYNC_ENABLE:/* ignored */
		break;

	case SQL_BIND_TYPE:		
		/* now support multi-column and multi-row binding */
		if (conn) conn->stmtOptions.bind_size = vParam;
		if (stmt) stmt->options.bind_size = vParam;
		break;

	case SQL_CONCURRENCY:
		/*	positioned update isn't supported so cursor concurrency is read-only */

		if (conn) conn->stmtOptions.scroll_concurrency = vParam;
		if (stmt) stmt->options.scroll_concurrency = vParam;
		break;

		/*
		if (globals.lie) {
			if (conn) conn->stmtOptions.scroll_concurrency = vParam;
			if (stmt) stmt->options.scroll_concurrency = vParam;
		}
		else {

			if (conn) conn->stmtOptions.scroll_concurrency = SQL_CONCUR_READ_ONLY;
			if (stmt) stmt->options.scroll_concurrency = SQL_CONCUR_READ_ONLY;

			if (vParam != SQL_CONCUR_READ_ONLY)
				changed = TRUE;
		}
		break;
		*/
		
	case SQL_CURSOR_TYPE:
		/*	if declare/fetch, then type can only be forward.
			otherwise, it can only be forward or static.
		*/
		mylog("SetStmtOption(): SQL_CURSOR_TYPE = %d\n", vParam);

		if (globals.lie) {

			if (conn) conn->stmtOptions.cursor_type = vParam;
			if (stmt) stmt->options.cursor_type = vParam;

		}
		else {
			if (globals.use_declarefetch) {

				if (conn) conn->stmtOptions.cursor_type = SQL_CURSOR_FORWARD_ONLY;
				if (stmt) stmt->options.cursor_type = SQL_CURSOR_FORWARD_ONLY;

				if (vParam != SQL_CURSOR_FORWARD_ONLY) 
					changed = TRUE;
			}
			else {
				if (vParam == SQL_CURSOR_FORWARD_ONLY || vParam == SQL_CURSOR_STATIC) {

					if (conn) conn->stmtOptions.cursor_type = vParam;		/* valid type */
					if (stmt) stmt->options.cursor_type = vParam;		/* valid type */
				}
				else {

					if (conn) conn->stmtOptions.cursor_type = SQL_CURSOR_STATIC;
					if (stmt) stmt->options.cursor_type = SQL_CURSOR_STATIC;

					changed = TRUE;
				}
			}
		}
		break;

	case SQL_KEYSET_SIZE: /* ignored, but saved and returned  */
		mylog("SetStmtOption(): SQL_KEYSET_SIZE, vParam = %d\n", vParam);

		if (conn) conn->stmtOptions.keyset_size = vParam;
		if (stmt) stmt->options.keyset_size = vParam;

		break;

		/*
		if (globals.lie)
			stmt->keyset_size = vParam;
		else {
			stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
			stmt->errormsg = "Driver does not support keyset size option";
			SC_log_error(func, "", stmt);
			return SQL_ERROR;
		}
		*/

	case SQL_MAX_LENGTH:/* ignored, but saved */
		mylog("SetStmtOption(): SQL_MAX_LENGTH, vParam = %d\n", vParam);
		if (conn) conn->stmtOptions.maxLength = vParam;
		if (stmt) stmt->options.maxLength = vParam;
		break;

	case SQL_MAX_ROWS: /* ignored, but saved */
		mylog("SetStmtOption(): SQL_MAX_ROWS, vParam = %d\n", vParam);
		if (conn) conn->stmtOptions.maxRows = vParam;
		if (stmt) stmt->options.maxRows = vParam;
		break;

	case SQL_NOSCAN: /* ignored */
		mylog("SetStmtOption: SQL_NOSCAN, vParam = %d\n", vParam);
		break;

	case SQL_QUERY_TIMEOUT: /* ignored */
		mylog("SetStmtOption: SQL_QUERY_TIMEOUT, vParam = %d\n", vParam);
		/*	"0" returned in SQLGetStmtOption */
		break;

	case SQL_RETRIEVE_DATA: /* ignored, but saved */
		mylog("SetStmtOption(): SQL_RETRIEVE_DATA, vParam = %d\n", vParam);
		if (conn) conn->stmtOptions.retrieve_data = vParam;
		if (stmt) stmt->options.retrieve_data = vParam;
		break;

	case SQL_ROWSET_SIZE:
		mylog("SetStmtOption(): SQL_ROWSET_SIZE, vParam = %d\n", vParam);


		/*	Save old rowset size for SQLExtendedFetch purposes 
			If the rowset_size is being changed since the last call
			to fetch rows.
		*/

		if (stmt && stmt->save_rowset_size <= 0 && stmt->last_fetch_count > 0 )
			stmt->save_rowset_size = stmt->options.rowset_size;

		if (vParam < 1) {
			vParam = 1;
			changed = TRUE;
		}

		if (conn) conn->stmtOptions.rowset_size = vParam;
		if (stmt) stmt->options.rowset_size = vParam;

		break;

	case SQL_SIMULATE_CURSOR: /* NOT SUPPORTED */
		if (stmt) {
			stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
			stmt->errormsg = "Simulated positioned update/delete not supported.  Use the cursor library.";
			SC_log_error(func, "", stmt);
		}
		if (conn) {
			conn->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
			conn->errormsg = "Simulated positioned update/delete not supported.  Use the cursor library.";
			CC_log_error(func, "", conn);
		}
		return SQL_ERROR;

	case SQL_USE_BOOKMARKS:

		if (stmt) stmt->options.use_bookmarks = vParam;
		if (conn) conn->stmtOptions.use_bookmarks = vParam;
		break;

    default:
		{
		char option[64];

		if (stmt) {
			stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
			stmt->errormsg = "Unknown statement option (Set)";
			sprintf(option, "fOption=%d, vParam=%ld", fOption, vParam);
			SC_log_error(func, option, stmt);
		}
		if (conn) {
			conn->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
			conn->errormsg = "Unknown statement option (Set)";
			sprintf(option, "fOption=%d, vParam=%ld", fOption, vParam);
			CC_log_error(func, option, conn);
		}

        return SQL_ERROR;
		}
    }

	if (changed) {
		if (stmt) {
			stmt->errormsg = "Requested value changed.";
			stmt->errornumber = STMT_OPTION_VALUE_CHANGED;
		}
		if (conn) {
			conn->errormsg = "Requested value changed.";
			conn->errornumber = STMT_OPTION_VALUE_CHANGED;
		}
		return SQL_SUCCESS_WITH_INFO;
	}
	else
		return SQL_SUCCESS;
}



/* Implements only SQL_AUTOCOMMIT */
RETCODE SQL_API SQLSetConnectOption(
        HDBC    hdbc,
        UWORD   fOption,
        UDWORD  vParam)
{
static char *func="SQLSetConnectOption";
ConnectionClass *conn = (ConnectionClass *) hdbc;
char changed = FALSE;
RETCODE retval;
int i;

	mylog("%s: entering...\n", func);

	if ( ! conn)  {
		CC_log_error(func, "", NULL);
		return SQL_INVALID_HANDLE;
	}


	switch (fOption) {
	/* Statement Options 
	   (apply to all stmts on the connection and become defaults for new stmts)
	*/
	case SQL_ASYNC_ENABLE:
	case SQL_BIND_TYPE:		
	case SQL_CONCURRENCY:
	case SQL_CURSOR_TYPE:
	case SQL_KEYSET_SIZE: 
	case SQL_MAX_LENGTH:
	case SQL_MAX_ROWS:
	case SQL_NOSCAN: 
	case SQL_QUERY_TIMEOUT:
	case SQL_RETRIEVE_DATA:
	case SQL_ROWSET_SIZE:
	case SQL_SIMULATE_CURSOR:
	case SQL_USE_BOOKMARKS:

		/*	Affect all current Statements */
		for (i = 0; i < conn->num_stmts; i++) {
			if ( conn->stmts[i]) {
				set_statement_option(NULL, conn->stmts[i], fOption, vParam);
			}
		}

		/*	Become the default for all future statements on this connection */
		retval = set_statement_option(conn, NULL, fOption, vParam);

		if (retval == SQL_SUCCESS_WITH_INFO)
			changed = TRUE;
		else if (retval == SQL_ERROR)
			return SQL_ERROR;

		break;

	/**********************************/
	/*****	Connection Options  *******/	
	/**********************************/

	case SQL_ACCESS_MODE: /* ignored */
		break;

	case SQL_AUTOCOMMIT:

		/*  Since we are almost always in a transaction, this is now ok.
			Even if we were, the logic will handle it by sending a commit
			after the statement.
		
		if (CC_is_in_trans(conn)) {
			conn->errormsg = "Cannot switch commit mode while a transaction is in progres";
			conn->errornumber = CONN_TRANSACT_IN_PROGRES;
			CC_log_error(func, "", conn);
			return SQL_ERROR;
		}
		*/

		mylog("SQLSetConnectOption: AUTOCOMMIT: transact_status=%d, vparam=%d\n", conn->transact_status, vParam);

		switch(vParam) {
		case SQL_AUTOCOMMIT_OFF:
			CC_set_autocommit_off(conn);
		/* The following two lines are new.
		   With this modification the SELECT statements
		   are also included in the transactions.
		   Error handling should be written, 
		   this is missing yet, see
		   SC_execute in statement.c for details. Zoltan
		*/    
			CC_send_query(conn,"BEGIN",NULL);
			CC_set_in_trans(conn);
			break;

		case SQL_AUTOCOMMIT_ON:
			CC_set_autocommit_on(conn);
			break;

		default:
			conn->errormsg = "Illegal parameter value for SQL_AUTOCOMMIT";
			conn->errornumber = CONN_INVALID_ARGUMENT_NO;
			CC_log_error(func, "", conn);
			return SQL_ERROR;
		}

		break;

	case SQL_CURRENT_QUALIFIER: /* ignored */
		break;

	case SQL_LOGIN_TIMEOUT: /* ignored */
		break;

	case SQL_PACKET_SIZE:	/* ignored */
		break;

	case SQL_QUIET_MODE:	/* ignored */
		break;

	case SQL_TXN_ISOLATION: /* ignored */
		break;
		
	/*	These options should be handled by driver manager */
	case SQL_ODBC_CURSORS:
	case SQL_OPT_TRACE:
	case SQL_OPT_TRACEFILE:
	case SQL_TRANSLATE_DLL:
	case SQL_TRANSLATE_OPTION:
		CC_log_error(func, "This connect option (Set) is only used by the Driver Manager", conn);
		break;

	default:
		{ 
		char option[64];
		conn->errormsg = "Unknown connect option (Set)";
		conn->errornumber = CONN_UNSUPPORTED_OPTION;
		sprintf(option, "fOption=%d, vParam=%ld", fOption, vParam);
		CC_log_error(func, option, conn);
		return SQL_ERROR;
		}

	}    

	if (changed) {
		conn->errornumber = CONN_OPTION_VALUE_CHANGED;
		conn->errormsg = "Requested value changed.";
		return SQL_SUCCESS_WITH_INFO;
	}
	else
		return SQL_SUCCESS;
}

/*      -       -       -       -       -       -       -       -       - */

/* This function just can tell you whether you are in Autcommit mode or not */
RETCODE SQL_API SQLGetConnectOption(
        HDBC    hdbc,
        UWORD   fOption,
        PTR     pvParam)
{
static char *func="SQLGetConnectOption";
ConnectionClass *conn = (ConnectionClass *) hdbc;

	mylog("%s: entering...\n", func);

	if (! conn)  {
		CC_log_error(func, "", NULL);
		return SQL_INVALID_HANDLE;
	}

	switch (fOption) {
	case SQL_ACCESS_MODE:/* NOT SUPPORTED */
		*((UDWORD *) pvParam) = SQL_MODE_READ_WRITE;
		break;

	case SQL_AUTOCOMMIT:
		*((UDWORD *)pvParam) = (UDWORD)( CC_is_in_autocommit(conn) ?
						SQL_AUTOCOMMIT_ON : SQL_AUTOCOMMIT_OFF);
		break;

	case SQL_CURRENT_QUALIFIER:	/* don't use qualifiers */
		if(pvParam)
			strcpy(pvParam, "");

		break;

	case SQL_LOGIN_TIMEOUT: /* NOT SUPPORTED */
		*((UDWORD *) pvParam) = 0;
		break;

	case SQL_PACKET_SIZE: /* NOT SUPPORTED */
		*((UDWORD *) pvParam) = globals.socket_buffersize;
		break;

	case SQL_QUIET_MODE:/* NOT SUPPORTED */
		*((UDWORD *) pvParam) = (UDWORD) NULL;
		break;

	case SQL_TXN_ISOLATION:/* NOT SUPPORTED */
		*((UDWORD *) pvParam) = SQL_TXN_SERIALIZABLE;
		break;

	/*	These options should be handled by driver manager */
	case SQL_ODBC_CURSORS:
	case SQL_OPT_TRACE:
	case SQL_OPT_TRACEFILE:
	case SQL_TRANSLATE_DLL:
	case SQL_TRANSLATE_OPTION:
		CC_log_error(func, "This connect option (Get) is only used by the Driver Manager", conn);
		break;

	default:
		{
		char option[64];
		conn->errormsg = "Unknown connect option (Get)";
		conn->errornumber = CONN_UNSUPPORTED_OPTION;
		sprintf(option, "fOption=%d", fOption);
		CC_log_error(func, option, conn);
		return SQL_ERROR;
		break;
		}

	}    

	return SQL_SUCCESS;
}

/*      -       -       -       -       -       -       -       -       - */

RETCODE SQL_API SQLSetStmtOption(
        HSTMT   hstmt,
        UWORD   fOption,
        UDWORD  vParam)
{
static char *func="SQLSetStmtOption";
StatementClass *stmt = (StatementClass *) hstmt;

	mylog("%s: entering...\n", func);

	/* thought we could fake Access out by just returning SQL_SUCCESS */
	/* all the time, but it tries to set a huge value for SQL_MAX_LENGTH */
	/* and expects the driver to reduce it to the real value */

	if( ! stmt) {
		SC_log_error(func, "", NULL);
		return SQL_INVALID_HANDLE;
	}

	return set_statement_option(NULL, stmt, fOption, vParam);
}


/*      -       -       -       -       -       -       -       -       - */

RETCODE SQL_API SQLGetStmtOption(
        HSTMT   hstmt,
        UWORD   fOption,
        PTR     pvParam)
{
static char *func="SQLGetStmtOption";
StatementClass *stmt = (StatementClass *) hstmt;
QResultClass *res;

	mylog("%s: entering...\n", func);

	/* thought we could fake Access out by just returning SQL_SUCCESS */
	/* all the time, but it tries to set a huge value for SQL_MAX_LENGTH */
	/* and expects the driver to reduce it to the real value */

	if( ! stmt) {
		SC_log_error(func, "", NULL);
		return SQL_INVALID_HANDLE;
	}

	switch(fOption) {
	case SQL_GET_BOOKMARK:
	case SQL_ROW_NUMBER:

		res = stmt->result;

		if ( stmt->manual_result || ! globals.use_declarefetch) {
			/* make sure we're positioned on a valid row */
			if((stmt->currTuple < 0) ||
			   (stmt->currTuple >= QR_get_num_tuples(res))) {
				stmt->errormsg = "Not positioned on a valid row.";
				stmt->errornumber = STMT_INVALID_CURSOR_STATE_ERROR;
				SC_log_error(func, "", stmt);
				return SQL_ERROR;
			}
		}
		else {
			if (stmt->currTuple == -1 || ! res || ! res->tupleField) {
				stmt->errormsg = "Not positioned on a valid row.";
				stmt->errornumber = STMT_INVALID_CURSOR_STATE_ERROR;
				SC_log_error(func, "", stmt);
				return SQL_ERROR;
			}
		}

		if (fOption == SQL_GET_BOOKMARK && stmt->options.use_bookmarks == SQL_UB_OFF) {
			stmt->errormsg = "Operation invalid because use bookmarks not enabled.";
			stmt->errornumber = STMT_OPERATION_INVALID;
			SC_log_error(func, "", stmt);
			return SQL_ERROR;
		}

		*((UDWORD *) pvParam) = SC_get_bookmark(stmt);
		
		break;

	case SQL_ASYNC_ENABLE:	/* NOT SUPPORTED */
		*((SDWORD *) pvParam) = SQL_ASYNC_ENABLE_OFF;
		break;

	case SQL_BIND_TYPE:
		*((SDWORD *) pvParam) = stmt->options.bind_size;
		break;

	case SQL_CONCURRENCY: /* NOT REALLY SUPPORTED */
		mylog("GetStmtOption(): SQL_CONCURRENCY\n");
		*((SDWORD *)pvParam) = stmt->options.scroll_concurrency;
		break;

	case SQL_CURSOR_TYPE: /* PARTIAL SUPPORT */
		mylog("GetStmtOption(): SQL_CURSOR_TYPE\n");
		*((SDWORD *)pvParam) = stmt->options.cursor_type;
		break;

	case SQL_KEYSET_SIZE: /* NOT SUPPORTED, but saved */
		mylog("GetStmtOption(): SQL_KEYSET_SIZE\n");
		*((SDWORD *)pvParam) = stmt->options.keyset_size;
		break;

	case SQL_MAX_LENGTH: /* NOT SUPPORTED, but saved */
		*((SDWORD *)pvParam) = stmt->options.maxLength;
		break;

	case SQL_MAX_ROWS: /* NOT SUPPORTED, but saved */
		*((SDWORD *)pvParam) = stmt->options.maxRows;
		mylog("GetSmtOption: MAX_ROWS, returning %d\n", stmt->options.maxRows);
		break;

	case SQL_NOSCAN:/* NOT SUPPORTED */
		*((SDWORD *) pvParam) = SQL_NOSCAN_ON;
		break;

	case SQL_QUERY_TIMEOUT: /* NOT SUPPORTED */
		*((SDWORD *) pvParam) = 0;
		break;

	case SQL_RETRIEVE_DATA: /* NOT SUPPORTED, but saved */
		*((SDWORD *) pvParam) = stmt->options.retrieve_data;
		break;

	case SQL_ROWSET_SIZE:
		*((SDWORD *) pvParam) = stmt->options.rowset_size;
		break;

	case SQL_SIMULATE_CURSOR:/* NOT SUPPORTED */
		*((SDWORD *) pvParam) = SQL_SC_NON_UNIQUE;
		break;

	case SQL_USE_BOOKMARKS:
		*((SDWORD *) pvParam) = stmt->options.use_bookmarks;
		break;

	default:
		{
		char option[64];
		stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
		stmt->errormsg = "Unknown statement option (Get)";
		sprintf(option, "fOption=%d", fOption);
		SC_log_error(func, option, stmt);
		return SQL_ERROR;
		}
	}

	return SQL_SUCCESS;
}

/*      -       -       -       -       -       -       -       -       - */