97 lines
3.2 KiB
C++
97 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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#ifndef _OB_SQL_EXPR_ORACLE_DECODE_H_
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#define _OB_SQL_EXPR_ORACLE_DECODE_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 ObExprOracleDecode : public ObExprOperator
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{
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OB_UNIS_VERSION_V(1);
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public:
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explicit ObExprOracleDecode(common::ObIAllocator &alloc);
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virtual ~ObExprOracleDecode();
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *types_stack,
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int64_t param_num,
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common::ObExprTypeCtx &type_ctx) const;
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int no_cast_calc(common::ObObj &result,
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const common::ObObj *objs_stack,
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int64_t param_num) const;
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int calc_result_type_for_literal(ObExprResType &type,
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ObExprResType *types_stack,
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int64_t param_num,
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common::ObExprTypeCtx &type_ctx) const;
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virtual int cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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static int eval_decode(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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public:
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inline void set_cond_all_same_meta(bool all_same_meta);
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inline void set_val_all_same_meta(bool all_same_meta);
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static bool can_compare_directly(common::ObObjType type1, common::ObObjType type2);
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private:
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inline static int get_cmp_type(common::ObObjType &type, const common::ObObjType &type1,
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const common::ObObjType &type2, const common::ObObjType &type3);
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inline bool is_cond_all_same_meta() const;
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inline bool is_val_all_same_meta() const;
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inline bool need_no_cast() const;
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private:
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typedef uint32_t ObExprDecodeParamFlag;
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static const uint32_t COND_ALL_SAME_META = 1U << 0;
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static const uint32_t VAL_ALL_SAME_META = 1U << 1;
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ObExprDecodeParamFlag param_flags_;
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprOracleDecode);
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};
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inline void ObExprOracleDecode::set_cond_all_same_meta(bool all_same_meta)
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{
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if (all_same_meta) {
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param_flags_ |= COND_ALL_SAME_META;
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} else {
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param_flags_ &= ~COND_ALL_SAME_META;
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}
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}
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inline void ObExprOracleDecode::set_val_all_same_meta(bool all_same_meta)
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{
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if (all_same_meta) {
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param_flags_ |= VAL_ALL_SAME_META;
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} else {
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param_flags_ &= ~VAL_ALL_SAME_META;
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}
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}
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inline bool ObExprOracleDecode::is_cond_all_same_meta() const
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{
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return param_flags_ & COND_ALL_SAME_META;
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}
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inline bool ObExprOracleDecode::is_val_all_same_meta() const
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{
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return param_flags_ & VAL_ALL_SAME_META;
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}
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inline bool ObExprOracleDecode::need_no_cast() const
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{
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return is_cond_all_same_meta() && is_val_all_same_meta();
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}
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}
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}
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#endif /* _OB_SQL_EXPR_ORACLE_DECODE_H_ */
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