103 lines
3.2 KiB
C++
103 lines
3.2 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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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/expr/ob_expr_timestamp_nvl.h"
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#include "share/object/ob_obj_cast.h"
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#include "sql/session/ob_sql_session_info.h"
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using namespace oceanbase::common;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprTimestampNvl::ObExprTimestampNvl(ObIAllocator &alloc)
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: ObStringExprOperator(alloc, T_FUN_SYS_TIMESTAMP_NVL, N_TIMESTAMP_NVL, 2)
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{
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}
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ObExprTimestampNvl::~ObExprTimestampNvl()
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{
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}
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int ObExprTimestampNvl::calc_result_type2(ObExprResType &type,
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ObExprResType &type1,
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ObExprResType &type2,
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common::ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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UNUSED(type_ctx);
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UNUSED(type2);
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if (is_oracle_mode()) {
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type.set_type(ObTimestampNanoType);
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} else {
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type.set_type(ObTimestampType);
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}
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type.set_accuracy(type1.get_accuracy());
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type.set_collation_level(type1.get_collation_level());
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type.set_collation_type(type1.get_collation_type());
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type1.set_calc_meta(type.get_obj_meta());
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type2.set_calc_meta(type.get_obj_meta());
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return ret;
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}
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int ObExprTimestampNvl::cg_expr(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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if (rt_expr.arg_cnt_ != 2) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("timestampnvl expr should have two params", K(ret), K(rt_expr.arg_cnt_));
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} else if (OB_ISNULL(rt_expr.args_) || OB_ISNULL(rt_expr.args_[0])
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|| OB_ISNULL(rt_expr.args_[1])) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("children of timestampnvl expr is null", K(ret), K(rt_expr.args_));
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} else {
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rt_expr.eval_func_ = ObExprTimestampNvl::calc_timestampnvl;
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}
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return ret;
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}
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int ObExprTimestampNvl::calc_timestampnvl(const ObExpr &expr, ObEvalCtx &ctx,
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ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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ObDatum *param_datum1 = NULL;
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ObDatum *param_datum2 = NULL;
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bool oracle_mode = is_oracle_mode();
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if (OB_FAIL(expr.eval_param_value(ctx, param_datum1, param_datum2))) {
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LOG_WARN("eval param value failed", K(ret));
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} else if (param_datum1->is_null()) {
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if (param_datum2->is_null()) {
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expr_datum.set_null();
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} else if (oracle_mode){
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expr_datum.set_otimestamp_tiny(param_datum2->get_otimestamp_tiny());
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} else {
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expr_datum.set_timestamp(param_datum2->get_timestamp());
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}
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} else if (oracle_mode) {
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expr_datum.set_otimestamp_tiny(param_datum1->get_otimestamp_tiny());
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} else {
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expr_datum.set_timestamp(param_datum1->get_timestamp());
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}
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return ret;
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}
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}
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}
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