Ejemplo n.º 1
0
/*
 *	The execution after all parameters were resolved.
 */
static
RETCODE	Exec_with_parameters_resolved(StatementClass *stmt, BOOL *exec_end)
{
	CSTR func = "Exec_with_parameters_resolved";
	RETCODE		retval;
	SQLLEN		end_row;
	SQLINTEGER	cursor_type, scroll_concurrency;
	ConnectionClass	*conn;
	QResultClass	*res;
	APDFields	*apdopts;
	IPDFields	*ipdopts;
	BOOL		prepare_before_exec = FALSE;

	*exec_end = FALSE;
	conn = SC_get_conn(stmt);
	mylog("%s: copying statement params: trans_status=%d, len=%d, stmt='%s'\n", func, conn->transact_status, strlen(stmt->statement), stmt->statement);

#define	return	DONT_CALL_RETURN_FROM_HERE???
#define	RETURN(code)	{ retval = code; goto cleanup; }
	ENTER_CONN_CS(conn);
	/* save the cursor's info before the execution */
	cursor_type = stmt->options.cursor_type;
	scroll_concurrency = stmt->options.scroll_concurrency;
	/* Prepare the statement if possible at backend side */
	if (!stmt->inaccurate_result)
	{
		if (HowToPrepareBeforeExec(stmt, FALSE) >= allowParse)
			prepare_before_exec = TRUE;
	}
inolog("prepare_before_exec=%d srv=%d\n", prepare_before_exec, conn->connInfo.use_server_side_prepare);
	/* Create the statement with parameters substituted. */
	retval = copy_statement_with_parameters(stmt, prepare_before_exec);
	stmt->current_exec_param = -1;
	if (retval != SQL_SUCCESS)
	{
		stmt->exec_current_row = -1;
		*exec_end = TRUE;
		RETURN(retval) /* error msg is passed from the above */
	}
Ejemplo n.º 2
0
/*
 *	The execution after all parameters were resolved.
 */
static
RETCODE	Exec_with_parameters_resolved(StatementClass *stmt, BOOL *exec_end)
{
	CSTR func = "Exec_with_parameters_resolved";
	RETCODE		retval;
	SQLLEN		end_row;
	SQLINTEGER	cursor_type, scroll_concurrency;
	ConnectionClass	*conn;
	QResultClass	*res;
	APDFields	*apdopts;
	IPDFields	*ipdopts;
	BOOL		prepare_before_exec = FALSE;

	*exec_end = FALSE;
	conn = SC_get_conn(stmt);
	mylog("%s: copying statement params: trans_status=%d, len=%d, stmt='%s'\n", func, conn->transact_status, strlen(stmt->statement), stmt->statement);

	/* save the cursor's info before the execution */
	cursor_type = stmt->options.cursor_type;
	scroll_concurrency = stmt->options.scroll_concurrency;
	/* Prepare the statement if possible at backend side */
	if (!stmt->inaccurate_result)
	{
		if (HowToPrepareBeforeExec(stmt, FALSE) >= allowParse)
			prepare_before_exec = TRUE;
	}
inolog("prepare_before_exec=%d srv=%d\n", prepare_before_exec, conn->connInfo.use_server_side_prepare);
	/* Create the statement with parameters substituted. */
	retval = copy_statement_with_parameters(stmt, prepare_before_exec);
	stmt->current_exec_param = -1;
	if (retval != SQL_SUCCESS)
	{
		stmt->exec_current_row = -1;
		*exec_end = TRUE;
		return retval; /* error msg is passed from the above */
	}

	mylog("   stmt_with_params = '%s'\n", stmt->stmt_with_params);

	/*
	 *	Dummy exection to get the column info.
	 */ 
	if (stmt->inaccurate_result && SC_is_parse_tricky(stmt))
	{
		BOOL		in_trans = CC_is_in_trans(conn);
		BOOL		issued_begin = FALSE;
		QResultClass *curres;

		stmt->exec_current_row = -1;
		*exec_end = TRUE;
		if (!SC_is_pre_executable(stmt))
			return SQL_SUCCESS;
		if (strnicmp(stmt->stmt_with_params, "BEGIN;", 6) == 0)
		{
			/* do nothing */
		}
		else if (!in_trans)
		{
			if (issued_begin = CC_begin(conn), !issued_begin)
			{
				SC_set_error(stmt, STMT_EXEC_ERROR,  "Handle prepare error", func);
				return SQL_ERROR;
			}
		}
		/* we are now in a transaction */
		res = CC_send_query(conn, stmt->stmt_with_params, NULL, 0, SC_get_ancestor(stmt));
		if (!QR_command_maybe_successful(res))
		{
#ifndef	_LEGACY_MODE_
			if (PG_VERSION_LT(conn, 8.0))
				CC_abort(conn);
#endif /* LEGACY_MODE_ */
			SC_set_error(stmt, STMT_EXEC_ERROR, "Handle prepare error", func);
			QR_Destructor(res);
			return SQL_ERROR;
		}
		SC_set_Result(stmt, res);
		for (curres = res; !curres->num_fields; curres = curres->next)
			;
		SC_set_Curres(stmt, curres);
		if (CC_does_autocommit(conn))
		{
			if (issued_begin)
				CC_commit(conn);
		}
		stmt->status = STMT_FINISHED;
		return SQL_SUCCESS;
	}
	/*
	 *	The real execution.
	 */
mylog("about to begin SC_execute\n");
	retval = SC_execute(stmt);
	if (retval == SQL_ERROR)
	{
		stmt->exec_current_row = -1;
		*exec_end = TRUE;
		return retval;
	}
	res = SC_get_Result(stmt);
	/* special handling of result for keyset driven cursors */
	if (SQL_CURSOR_KEYSET_DRIVEN == stmt->options.cursor_type &&
	    SQL_CONCUR_READ_ONLY != stmt->options.scroll_concurrency)
	{
		QResultClass	*kres;

		if (kres = res->next, kres)
		{
			if (kres->fields)
				CI_Destructor(kres->fields);
			kres->fields = res->fields;
			res->fields = NULL;
			kres->num_fields = res->num_fields;
			res->next = NULL;
			SC_set_Result(stmt, kres);
			res = kres;
		}
	}
#ifdef	NOT_USED
	else if (SC_is_concat_prepare_exec(stmt))
	{
		if (res && QR_command_maybe_successful(res))
		{
			QResultClass	*kres;
		
			kres = res->next;
inolog("res->next=%p\n", kres);
			res->next = NULL;
			SC_set_Result(stmt, kres);
			res = kres;
			SC_set_prepared(stmt, PREPARED_PERMANENTLY);
		}
		else
		{
			retval = SQL_ERROR;
			if (stmt->execute_statement)
				free(stmt->execute_statement);
			stmt->execute_statement = NULL;
		}
	}
#endif /* NOT_USED */
#if (ODBCVER >= 0x0300)
	ipdopts = SC_get_IPDF(stmt);
	if (ipdopts->param_status_ptr)
	{
		switch (retval)
		{
			case SQL_SUCCESS: 
				ipdopts->param_status_ptr[stmt->exec_current_row] = SQL_PARAM_SUCCESS;
				break;
			case SQL_SUCCESS_WITH_INFO: 
				ipdopts->param_status_ptr[stmt->exec_current_row] = SQL_PARAM_SUCCESS_WITH_INFO;
				break;
			default: 
				ipdopts->param_status_ptr[stmt->exec_current_row] = SQL_PARAM_ERROR;
				break;
		}
	}
#endif /* ODBCVER */
	if (end_row = stmt->exec_end_row, end_row < 0)
	{
		apdopts = SC_get_APDF(stmt);
		end_row = (SQLINTEGER) apdopts->paramset_size - 1;
	}
	if (stmt->inaccurate_result ||
	    stmt->exec_current_row >= end_row)
	{
		*exec_end = TRUE;
		stmt->exec_current_row = -1;
	}
	else
		stmt->exec_current_row++;
	if (res)
	{
#if (ODBCVER >= 0x0300)
		EnvironmentClass *env = (EnvironmentClass *) CC_get_env(conn);
		const char *cmd = QR_get_command(res);
		SQLLEN	start_row;
		if (start_row = stmt->exec_start_row, start_row < 0)
			start_row = 0;

		if (retval == SQL_SUCCESS &&
		    NULL != cmd &&
		    start_row >= end_row &&
		    NULL != env &&
		    EN_is_odbc3(env))
		{
			int     count;

			if (sscanf(cmd , "UPDATE %d", &count) == 1)
				;
			else if (sscanf(cmd , "DELETE %d", &count) == 1)
				;
			else
				count = -1;
			if (0 == count)
				retval = SQL_NO_DATA;
		}
#endif /* ODBCVER */
		stmt->diag_row_count = res->recent_processed_row_count;
	}
	/*
	 *	The cursor's info was changed ?
	 */
	if (retval == SQL_SUCCESS &&
	    (stmt->options.cursor_type != cursor_type ||
	     stmt->options.scroll_concurrency != scroll_concurrency))
	{
		SC_set_error(stmt, STMT_OPTION_VALUE_CHANGED, "cursor updatability changed", func);
		retval = SQL_SUCCESS_WITH_INFO;
	}
	return retval;
}