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342 lines
8.1 KiB
C
342 lines
8.1 KiB
C
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/* Module: options.c
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*
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* Description: This module contains routines for getting/setting
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* connection and statement options.
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*
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* Classes: n/a
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*
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* API functions: SQLSetConnectOption, SQLSetStmtOption, SQLGetConnectOption,
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* SQLGetStmtOption
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*
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* Comments: See "notice.txt" for copyright and license information.
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*
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*/
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#include "psqlodbc.h"
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#include <windows.h>
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#include <sql.h>
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#include <sqlext.h>
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#include "environ.h"
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#include "connection.h"
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#include "statement.h"
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extern GLOBAL_VALUES globals;
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/* Implements only SQL_AUTOCOMMIT */
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RETCODE SQL_API SQLSetConnectOption(
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HDBC hdbc,
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UWORD fOption,
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UDWORD vParam)
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{
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char *func="SQLSetConnectOption";
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ConnectionClass *conn = (ConnectionClass *) hdbc;
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if ( ! conn) {
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CC_log_error(func, "", NULL);
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return SQL_INVALID_HANDLE;
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}
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switch (fOption) {
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case SQL_AUTOCOMMIT:
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/* Since we are almost always in a transaction, this is now ok.
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Even if we were, the logic will handle it by sending a commit
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after the statement.
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if (CC_is_in_trans(conn)) {
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conn->errormsg = "Cannot switch commit mode while a transaction is in progres";
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conn->errornumber = CONN_TRANSACT_IN_PROGRES;
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CC_log_error(func, "", conn);
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return SQL_ERROR;
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}
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*/
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mylog("SQLSetConnectOption: AUTOCOMMIT: transact_status=%d, vparam=%d\n", conn->transact_status, vParam);
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switch(vParam) {
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case SQL_AUTOCOMMIT_OFF:
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CC_set_autocommit_off(conn);
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break;
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case SQL_AUTOCOMMIT_ON:
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CC_set_autocommit_on(conn);
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break;
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default:
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conn->errormsg = "Illegal parameter value for SQL_AUTOCOMMIT";
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conn->errornumber = CONN_INVALID_ARGUMENT_NO;
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CC_log_error(func, "", conn);
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return SQL_ERROR;
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}
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break;
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case SQL_LOGIN_TIMEOUT:
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break;
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case SQL_ACCESS_MODE:
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break;
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default:
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{
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char option[32];
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conn->errormsg = "This option is currently unsupported by the driver";
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conn->errornumber = CONN_UNSUPPORTED_OPTION;
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sprintf(option, "fOption=%d", fOption);
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CC_log_error(func, option, conn);
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return SQL_ERROR;
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}
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}
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return SQL_SUCCESS;
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}
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// - - - - - - - - -
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/* This function just can tell you whether you are in Autcommit mode or not */
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RETCODE SQL_API SQLGetConnectOption(
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HDBC hdbc,
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UWORD fOption,
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PTR pvParam)
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{
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char *func="SQLGetConnectOption";
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ConnectionClass *conn = (ConnectionClass *) hdbc;
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if (! conn) {
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CC_log_error(func, "", NULL);
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return SQL_INVALID_HANDLE;
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}
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switch (fOption) {
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case SQL_AUTOCOMMIT:
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*((UDWORD *)pvParam) = (UDWORD)( CC_is_in_autocommit(conn) ?
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SQL_AUTOCOMMIT_ON : SQL_AUTOCOMMIT_OFF);
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break;
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/* don't use qualifiers */
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case SQL_CURRENT_QUALIFIER:
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if(pvParam)
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strcpy(pvParam, "");
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break;
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default:
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{
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char option[32];
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conn->errormsg = "This option is currently unsupported by the driver";
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conn->errornumber = CONN_UNSUPPORTED_OPTION;
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sprintf(option, "fOption=%d", fOption);
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CC_log_error(func, option, conn);
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return SQL_ERROR;
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break;
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}
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}
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return SQL_SUCCESS;
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}
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// - - - - - - - - -
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RETCODE SQL_API SQLSetStmtOption(
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HSTMT hstmt,
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UWORD fOption,
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UDWORD vParam)
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{
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char *func="SQLSetStmtOption";
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StatementClass *stmt = (StatementClass *) hstmt;
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char changed = FALSE;
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// thought we could fake Access out by just returning SQL_SUCCESS
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// all the time, but it tries to set a huge value for SQL_MAX_LENGTH
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// and expects the driver to reduce it to the real value
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if( ! stmt) {
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SC_log_error(func, "", NULL);
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return SQL_INVALID_HANDLE;
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}
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switch(fOption) {
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case SQL_QUERY_TIMEOUT:
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mylog("SetStmtOption: vParam = %d\n", vParam);
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// "0" returned in SQLGetStmtOption
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break;
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case SQL_MAX_LENGTH:
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// "4096" returned in SQLGetStmtOption
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break;
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case SQL_MAX_ROWS:
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mylog("SetStmtOption(): SQL_MAX_ROWS = %d, returning success\n", vParam);
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stmt->maxRows = vParam;
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return SQL_SUCCESS;
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break;
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case SQL_ROWSET_SIZE:
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mylog("SetStmtOption(): SQL_ROWSET_SIZE = %d\n", vParam);
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stmt->rowset_size = 1; // only support 1 row at a time
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if (vParam != 1)
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changed = TRUE;
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break;
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case SQL_KEYSET_SIZE:
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mylog("SetStmtOption(): SQL_KEYSET_SIZE = %d\n", vParam);
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if (globals.lie)
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stmt->keyset_size = vParam;
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else {
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stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
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stmt->errormsg = "Driver does not support keyset size option";
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SC_log_error(func, "", stmt);
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return SQL_ERROR;
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}
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break;
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case SQL_CONCURRENCY:
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// positioned update isn't supported so cursor concurrency is read-only
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mylog("SetStmtOption(): SQL_CONCURRENCY = %d\n", vParam);
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if (globals.lie)
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stmt->scroll_concurrency = vParam;
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else {
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stmt->scroll_concurrency = SQL_CONCUR_READ_ONLY;
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if (vParam != SQL_CONCUR_READ_ONLY)
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changed = TRUE;
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}
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break;
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case SQL_CURSOR_TYPE:
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// if declare/fetch, then type can only be forward.
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// otherwise, it can only be forward or static.
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mylog("SetStmtOption(): SQL_CURSOR_TYPE = %d\n", vParam);
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if (globals.lie)
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stmt->cursor_type = vParam;
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else {
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if (globals.use_declarefetch) {
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stmt->cursor_type = SQL_CURSOR_FORWARD_ONLY;
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if (vParam != SQL_CURSOR_FORWARD_ONLY)
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changed = TRUE;
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}
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else {
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if (vParam == SQL_CURSOR_FORWARD_ONLY || vParam == SQL_CURSOR_STATIC)
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stmt->cursor_type = vParam; // valid type
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else {
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stmt->cursor_type = SQL_CURSOR_STATIC;
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changed = TRUE;
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}
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}
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}
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break;
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case SQL_SIMULATE_CURSOR:
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stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
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stmt->errormsg = "Simulated positioned update/delete not supported. Use the cursor library.";
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SC_log_error(func, "", stmt);
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return SQL_ERROR;
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default:
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{
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char option[32];
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stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
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stmt->errormsg = "Driver does not support this statement option";
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sprintf(option, "fOption=%d", fOption);
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SC_log_error(func, option, stmt);
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return SQL_ERROR;
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}
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}
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if (changed) {
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stmt->errormsg = "Requested value changed.";
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stmt->errornumber = STMT_OPTION_VALUE_CHANGED;
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return SQL_SUCCESS_WITH_INFO;
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}
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else
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return SQL_SUCCESS;
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}
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// - - - - - - - - -
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RETCODE SQL_API SQLGetStmtOption(
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HSTMT hstmt,
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UWORD fOption,
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PTR pvParam)
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{
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char *func="SQLGetStmtOption";
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StatementClass *stmt = (StatementClass *) hstmt;
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// thought we could fake Access out by just returning SQL_SUCCESS
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// all the time, but it tries to set a huge value for SQL_MAX_LENGTH
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// and expects the driver to reduce it to the real value
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if( ! stmt) {
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SC_log_error(func, "", NULL);
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return SQL_INVALID_HANDLE;
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}
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switch(fOption) {
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case SQL_QUERY_TIMEOUT:
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// how long we wait on a query before returning to the
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// application (0 == forever)
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*((SDWORD *)pvParam) = 0;
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break;
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case SQL_MAX_LENGTH:
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// what is the maximum length that will be returned in
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// a single column
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*((SDWORD *)pvParam) = 4096;
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break;
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case SQL_MAX_ROWS:
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*((SDWORD *)pvParam) = stmt->maxRows;
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mylog("GetSmtOption: MAX_ROWS, returning %d\n", stmt->maxRows);
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break;
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case SQL_ROWSET_SIZE:
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mylog("GetStmtOption(): SQL_ROWSET_SIZE\n");
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*((SDWORD *)pvParam) = stmt->rowset_size;
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break;
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case SQL_KEYSET_SIZE:
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mylog("GetStmtOption(): SQL_KEYSET_SIZE\n");
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*((SDWORD *)pvParam) = stmt->keyset_size;
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break;
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case SQL_CONCURRENCY:
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mylog("GetStmtOption(): SQL_CONCURRENCY\n");
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*((SDWORD *)pvParam) = stmt->scroll_concurrency;
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break;
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case SQL_CURSOR_TYPE:
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mylog("GetStmtOption(): SQL_CURSOR_TYPE\n");
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*((SDWORD *)pvParam) = stmt->cursor_type;
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break;
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case SQL_SIMULATE_CURSOR:
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stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
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stmt->errormsg = "Simulated positioned update/delete not supported. Use the cursor library.";
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SC_log_error(func, "", stmt);
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return SQL_ERROR;
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default:
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{
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char option[32];
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stmt->errornumber = STMT_NOT_IMPLEMENTED_ERROR;
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stmt->errormsg = "Driver does not support this statement option";
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sprintf(option, "fOption=%d", fOption);
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SC_log_error(func, option, stmt);
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return SQL_ERROR;
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}
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}
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return SQL_SUCCESS;
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}
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// - - - - - - - - -
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