55 lines
2.3 KiB
C++
55 lines
2.3 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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* This file contains implementation for json_valid.
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*/
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#ifndef OCEANBASE_SQL_OB_EXPR_IS_JSON_H_
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#define OCEANBASE_SQL_OB_EXPR_IS_JSON_H_
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "sql/engine/expr/ob_expr_lob_utils.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 ObExprIsJson : public ObFuncExprOperator
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{
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public:
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explicit ObExprIsJson(common::ObIAllocator &alloc);
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virtual ~ObExprIsJson();
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virtual int calc_result_typeN(ObExprResType& type,
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ObExprResType* types,
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int64_t param_num,
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common::ObExprTypeCtx& type_ctx) const override;
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static int get_is_json_option(const ObExpr &expr, ObEvalCtx &ctx, int64_t idx, uint8_t& is_json_mode);
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static int check_is_json(const ObExpr &expr, ObEvalCtx &ctx,
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const ObDatum &data, ObObjType type,
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ObCollationType cs_type, ObArenaAllocator &allocator,
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uint8_t strict_opt, uint8_t scalar_opt, uint8_t unique_opt,
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bool check_for_is_json, ObDatum &res);
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static int eval_is_json(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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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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private:
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const static uint8_t OB_IS_JSON_MODE_DEFAULT = 0;
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const static uint8_t OB_IS_JSON_MODE_UNDEFAULT = 1;
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const static uint8_t OB_IS_JSON_MODE_MAX = 2;
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const static uint8_t OB_JSON_MODE_STRICT = 1;
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const static uint8_t OB_JSON_MODE_UNIQUE_KEYS = 1;
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const static uint32_t RESERVE_MIN_BUFF_SIZE = 32;
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// const static uint8_t OB_JSON_MODE_NO_UNIQUE_KEYS = 0;
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DISALLOW_COPY_AND_ASSIGN(ObExprIsJson);
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};
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} // sql
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} // oceanbase
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#endif // OCEANBASE_SQL_OB_EXPR_IS_JSON_H_
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