75 lines
3.0 KiB
C++
75 lines
3.0 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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#ifndef SRC_SQL_ENGINE_EXPR_OB_EXPR_INSTR_H_
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#define SRC_SQL_ENGINE_EXPR_OB_EXPR_INSTR_H_
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#include "sql/engine/expr/ob_expr_operator.h"
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namespace oceanbase
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{
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namespace sql
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{
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class ObExprInstr: public ObLocationExprOperator
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{
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public:
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ObExprInstr();
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explicit ObExprInstr(common::ObIAllocator &alloc);
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virtual ~ObExprInstr();
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virtual int cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const;
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static int calc_mysql_instr_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprInstr);
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};
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class ObExprOracleInstr: public ObLocationExprOperator
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{
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public:
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ObExprOracleInstr();
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explicit ObExprOracleInstr(common::ObIAllocator &alloc);
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virtual ~ObExprOracleInstr();
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *type_array,
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int64_t param_num,
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common::ObExprTypeCtx &type_ctx) const;
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static int slow_reverse_search(common::ObIAllocator &alloc,
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const common::ObCollationType &cs_type,
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const common::ObString &str1, const common::ObString &str2,
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int64_t neg_start, int64_t occ, uint32_t &idx);
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virtual int cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const;
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static int calc_oracle_instr_arg(const ObExpr &expr, ObEvalCtx &ctx,
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bool &is_null,
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common::ObDatum *&haystack, common::ObDatum *&needle,
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int64_t &pos_int, int64_t &occ_int,
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common::ObCollationType &calc_cs_type);
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static int calc_oracle_instr_expr(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res_datum);
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static int calc(common::ObObj &result,
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const common::ObObj &heystack,
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const common::ObObj &needle,
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const common::ObObj &position,
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const common::ObObj &occurrence,
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common::ObExprCtx &expr_ctx);
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private:
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virtual int 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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DISALLOW_COPY_AND_ASSIGN(ObExprOracleInstr);
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};
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}//end of namespace sql
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}//end of namespace oceanbase
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#endif /* SRC_SQL_ENGINE_EXPR_OB_EXPR_INSTR_H_ */
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