93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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// (C) Copyright 2011-2023 Alibaba Inc. All Rights Reserved.
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// Authors:
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// jim.wjh <>
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//
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_temp_table_ssid.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/ob_exec_context.h"
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprTempTableSSID::ObExprTempTableSSID(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_GET_TEMP_TABLE_SESSID, N_TEMP_TABLE_SSID, 1, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprTempTableSSID::~ObExprTempTableSSID()
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{
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}
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int ObExprTempTableSSID::calc_result_type1(ObExprResType &type, ObExprResType &type1, ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type1);
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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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type.set_int();
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type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].precision_);
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type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
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type1.set_calc_type(ObIntType);
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return ret;
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}
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int ObExprTempTableSSID::calc_temp_table_ssid(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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int ret = OB_SUCCESS;
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ObDatum *param = NULL;
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if (OB_ISNULL(ctx.exec_ctx_.get_my_session())) {
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ret = OB_ERR_UNDEFINED;
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} else if (OB_FAIL(expr.args_[0]->eval(ctx, param))) {
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LOG_WARN("fail to eval param", K(ret));
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} else if (expr.args_[0]->datum_meta_.type_ != ObIntType) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid object", K(ret));
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} else {
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switch (param->get_int()) {
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case GTT_SESSION_SCOPE:
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res.set_int(ctx.exec_ctx_.get_my_session()->get_gtt_session_scope_unique_id());
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break;
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case GTT_TRANS_SCOPE:
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res.set_int(ctx.exec_ctx_.get_my_session()->get_gtt_trans_scope_unique_id());
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break;
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default:
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("invalid object", K(ret), KPC(param));
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}
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LOG_DEBUG("get result", K(res.get_int()));
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}
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return ret;
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}
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int ObExprTempTableSSID::cg_expr(
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ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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UNUSED(op_cg_ctx);
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UNUSED(raw_expr);
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int ret = OB_SUCCESS;
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rt_expr.eval_func_ = calc_temp_table_ssid;
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return ret;
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}
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}
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}
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