56 lines
1.9 KiB
C++
56 lines
1.9 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 OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_FIELD_
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#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_FIELD_
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "share/object/ob_obj_cast.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 ObExprField : public ObVectorExprOperator
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{
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public:
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explicit ObExprField(common::ObIAllocator &alloc);
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virtual ~ObExprField() {};
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virtual int assign(const ObExprOperator &other);
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public:
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//serialize and deserialize
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virtual int serialize(char *buf, const int64_t buf_len, int64_t &pos) const;
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virtual int deserialize(const char *buf, const int64_t data_len, int64_t &pos);
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virtual int64_t get_serialize_size() const;
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public:
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *type_stack,
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int64_t param_num,
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common::ObExprTypeCtx &type_ctx) const;
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void set_need_cast(bool need_cast) {need_cast_ = need_cast;}
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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static int eval_field(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprField);
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private:
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bool need_cast_;
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};
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} // namespace sql
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} // namespace oceanbase
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#endif // OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_FIELD_
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