78 lines
2.6 KiB
C++
78 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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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_strcmp.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "share/object/ob_obj_cast.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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namespace sql {
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ObExprStrcmp::ObExprStrcmp(ObIAllocator& alloc)
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: ObRelationalExprOperator::ObRelationalExprOperator(alloc, T_FUN_SYS_STRCMP, N_STRCMP, 2, NOT_ROW_DIMENSION)
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{}
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int ObExprStrcmp::calc_result_type2(
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ObExprResType& type, ObExprResType& type1, ObExprResType& type2, ObExprTypeCtx& type_ctx) const
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{
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UNUSED(type2);
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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_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].scale_);
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type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].precision_);
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ObCollationType coll_type = CS_TYPE_INVALID;
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ObCollationLevel coll_level = CS_LEVEL_EXPLICIT;
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ret = ObCharset::aggregate_collation(type1.get_collation_level(),
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type1.get_collation_type(),
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type2.get_collation_level(),
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type2.get_collation_type(),
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coll_level,
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coll_type);
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type.set_calc_type(ObVarcharType);
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type.set_calc_collation_type(coll_type);
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type.set_calc_collation_level(coll_level);
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type1.set_calc_type(ObVarcharType);
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type2.set_calc_type(ObVarcharType);
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type1.set_calc_collation_type(coll_type);
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type2.set_calc_collation_type(coll_type);
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return ret;
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}
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int ObExprStrcmp::calc_result2(ObObj& result, const ObObj& obj1, const ObObj& obj2, ObExprCtx& expr_ctx) const
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{
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int ret = OB_SUCCESS;
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if (obj1.is_null() || obj2.is_null()) {
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result.set_null();
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} else if (OB_ISNULL(cmp_op_func2_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("unexpected error. cmp func is null", K(obj1), K(obj2), K(common::lbt()));
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} else {
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TYPE_CHECK(obj1, ObVarcharType);
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TYPE_CHECK(obj2, ObVarcharType);
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EXPR_DEFINE_CMP_CTX(result_type_.get_calc_meta(), false, expr_ctx);
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if (OB_FAIL(compare_nocast(result, obj1, obj2, cmp_ctx, CO_CMP, cmp_op_func2_))) {
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LOG_WARN("failed to compare objects", K(ret), K(obj1), K(obj2));
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}
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}
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return ret;
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}
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} // namespace sql
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} // namespace oceanbase
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