f1a6170c93
Co-authored-by: saltonz <saltonzh@gmail.com> Co-authored-by: pe-99y <315053752@qq.com> Co-authored-by: JinmaoLi <ljm.csmaster@gmail.com>
216 lines
10 KiB
C++
216 lines
10 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 is for func json_value.
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*/
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#ifndef OCEANBASE_SQL_OB_EXPR_JSON_VALUE_H_
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#define OCEANBASE_SQL_OB_EXPR_JSON_VALUE_H_
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "lib/json_type/ob_json_tree.h"
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#include "lib/json_type/ob_json_base.h"
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#include "ob_json_param_type.h"
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#include "ob_expr_json_utils.h"
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#include "ob_expr_json_func_helper.h"
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using namespace oceanbase::common;
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namespace oceanbase
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{
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namespace sql
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{
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/* process ascii */
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const static uint8_t OB_JSON_ON_ASCII_IMPLICIT = 0;
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const static uint8_t OB_JSON_ON_ASCII_USE = 1;
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class
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ObExprJsonValue : public ObFuncExprOperator
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{
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public:
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explicit ObExprJsonValue(common::ObIAllocator &alloc);
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virtual ~ObExprJsonValue();
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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)
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const override;
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static int eval_json_value(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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static int eval_ora_json_value(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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static int calc_input_type(ObExprResType& types_stack, bool &is_json_input);
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static int deal_item_method_in_seek(ObIJsonBase*& in,
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bool &is_null_result,
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ObJsonPath *j_path,
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ObIAllocator *allocator,
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uint8_t &is_type_mismatch);
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/* code for cast accuracy check */
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template<typename Obj>
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static int check_default_val_accuracy(const ObAccuracy &accuracy,
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const ObObjType &type,
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const Obj *obj);
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DECLARE_SET_LOCAL_SESSION_VARS;
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private:
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/* cast wrapper to dst type with accuracy check*/
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static int get_cast_ret(int ret);
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static int cast_to_int(ObIJsonBase *j_base, ObObjType dst_type, int64_t &val);
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static int cast_to_uint(ObIJsonBase *j_base, ObObjType dst_type, uint64_t &val);
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static int cast_to_datetime(ObIJsonBase *j_base,
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common::ObIAllocator *allocator,
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const ObBasicSessionInfo *session,
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ObEvalCtx &ctx,
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const ObExpr *expr,
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common::ObAccuracy &accuracy,
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int64_t &val,
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uint8_t &is_type_cast);
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static bool type_cast_to_string(ObString &json_string,
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common::ObIAllocator *allocator,
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ObIJsonBase *j_base,
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ObAccuracy &accuracy);
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static int cast_to_otimstamp(ObIJsonBase *j_base,
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const ObBasicSessionInfo *session,
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ObEvalCtx &ctx,
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const ObExpr *expr,
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common::ObAccuracy &accuracy,
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ObObjType dst_type,
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ObOTimestampData &out_val,
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uint8_t &is_type_cast);
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static int cast_to_date(ObIJsonBase *j_base, int32_t &val, uint8_t &is_type_cast);
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static int cast_to_time(ObIJsonBase *j_base,
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common::ObAccuracy &accuracy,
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int64_t &val);
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static int cast_to_year(ObIJsonBase *j_base, uint8_t &val);
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static int cast_to_float(ObIJsonBase *j_base, ObObjType dst_type, float &val);
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static int cast_to_double(ObIJsonBase *j_base, ObObjType dst_type, double &val);
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static int cast_to_number(common::ObIAllocator *allocator,
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ObIJsonBase *j_base,
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common::ObAccuracy &accuracy,
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ObObjType dst_type,
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number::ObNumber &val,
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uint8_t &is_type_cast);
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static int cast_to_string(common::ObIAllocator *allocator,
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ObIJsonBase *j_base,
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ObCollationType in_cs_type,
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ObCollationType dst_cs_type,
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common::ObAccuracy &accuracy,
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ObObjType dst_type,
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ObString &val,
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uint8_t &is_type_cast,
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uint8_t is_truncate);
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static int cast_to_bit(ObIJsonBase *j_base, uint64_t &val);
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static int cast_to_json(common::ObIAllocator *allocator, ObIJsonBase *j_base,
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ObString &val, uint8_t &is_type_cast);
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static int get_empty_or_error_type(const ObExpr &expr,
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ObEvalCtx &ctx,
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uint8_t index,
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bool &is_cover_by_error,
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const ObAccuracy &accuracy,
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uint8_t &type,
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ObObjType dst_type);
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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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virtual bool need_rt_ctx() const override { return true; }
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virtual common::ObCastMode get_cast_mode() const { return CM_ERROR_ON_SCALE_OVER;}
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static int calc_empty_error_type(ObExprResType* types_stack, uint8_t pos, ObExprResType &dst_type, ObExprTypeCtx& type_ctx);
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private:
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static bool try_set_error_val(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum &res, int &ret,
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ObJsonExprParam* json_param,
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uint8_t &is_type_mismatch);
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static int doc_do_seek(ObJsonSeekResult &hits, bool &is_null_result, ObJsonExprParam* json_param,
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ObIJsonBase *j_base, const ObExpr &expr, ObEvalCtx &ctx, bool &is_cover_by_error,
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ObDatum *&return_val,
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uint8_t &is_type_mismatch);
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// new sql engine
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static inline void set_val(ObDatum &res, ObDatum *val)
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{ res.set_datum(*val); }
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// old sql engine
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static inline void set_val(ObObj &res, ObObj *val)
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{ res = *val; }
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static int get_default_value(ObExpr *expr,
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ObEvalCtx &ctx,
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const ObAccuracy &accuracy,
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ObDatum **default_value);
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static int get_default_empty_error_value(const ObExpr &expr,
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ObJsonExprParam* json_param,
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ObEvalCtx &ctx);
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static int get_on_mismatch(const ObExpr &expr,
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ObEvalCtx &ctx,
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uint8_t index,
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bool &is_cover_by_error,
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const ObAccuracy &accuracy,
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ObIArray<int8_t> &val,
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ObIArray<int8_t> &type);
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/* code from ob_expr_cast for cal_result_type */
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int get_cast_type(const ObExprResType param_type2, ObExprResType &dst_type) const;
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int set_dest_type(ObExprResType &type1, ObExprResType &type, ObExprResType &dst_type, ObExprTypeCtx &type_ctx) const;
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int get_cast_string_len(ObExprResType &type1,
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ObExprResType &type2,
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common::ObExprTypeCtx &type_ctx,
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int32_t &res_len,
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int16_t &length_semantics,
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common::ObCollationType conn) const;
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int get_cast_inttc_len(ObExprResType &type1,
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ObExprResType &type2,
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common::ObExprTypeCtx &type_ctx,
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int32_t &res_len,
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int16_t &length_semantics,
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common::ObCollationType conn) const;
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static int check_default_value(ObExprResType* types_stack, int8_t pos, ObExprResType &dst_type);
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static int get_clause_param_value(const ObExpr &expr, ObEvalCtx &ctx,
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ObJsonExprParam* json_param,
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bool &is_cover_by_error);
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public:
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static int extract_plan_cache_param(const ObExprJsonQueryParamInfo *info, ObJsonExprParam& json_param);
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static int check_param_valid(const ObExpr &expr, ObJsonExprParam* json_param,
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ObJsonPath *j_path, bool &is_cover_by_error);
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static int init_ctx_var(const ObExpr &expr, ObJsonParamCacheCtx* param_ctx);
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static void get_mismatch_option(ObIArray<int8_t> &mismatch_val,
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ObIArray<int8_t> &mismatch_type,
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bool &is_null_res,
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bool &set_default_val);
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static void get_error_option(int8_t error_type,
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bool &is_null, bool &has_default_val);
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static int get_empty_option(ObDatum *&empty_res,
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bool &is_cover_by_error,
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int8_t empty_type,
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ObDatum *empty_datum,
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bool &is_null_result);
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static int set_result(const ObExpr &expr,
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ObJsonExprParam* json_param,
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ObEvalCtx &ctx,
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bool &is_null_result,
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bool &is_cover_by_error,
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uint8_t &is_type_mismatch,
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ObDatum &res,
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ObDatum *return_val,
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ObIAllocator *allocator,
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ObJsonSeekResult &hits);
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprJsonValue);
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};
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} // sql
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} // oceanbase
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#endif // OCEANBASE_SQL_OB_EXPR_JSON_VALUE_H_
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