140 lines
5.2 KiB
C++
140 lines
5.2 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_EXPR_NEXTVAL_H
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#define _OB_EXPR_NEXTVAL_H
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "sql/engine/expr/ob_i_expr_extra_info.h"
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#include "share/ob_autoincrement_service.h"
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namespace oceanbase
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{
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namespace share
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{
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}
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namespace sql
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{
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class ObPhysicalPlanCtx;
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class ObExprAutoincNextval : public ObFuncExprOperator
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{
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OB_UNIS_VERSION_V(1);
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public:
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explicit ObExprAutoincNextval(common::ObIAllocator &alloc);
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virtual ~ObExprAutoincNextval();
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *types_array,
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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 &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_nextval(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int get_uint_value(const ObExpr &input_expr, ObDatum *input_value,
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bool &is_zero, uint64_t &casted_value);
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private:
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//check to generate auto-inc value or not and cast.
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static int check_and_cast(common::ObObj &result,
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common::ObObjType result_type,
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const common::ObObj *objs_array,
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int64_t param_num,
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common::ObExprCtx &expr_ctx,
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share::AutoincParam *autoinc_param,
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bool &is_to_generate,
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uint64_t &casted_value);
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static int generate_autoinc_value(const ObSQLSessionInfo &my_session,
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uint64_t &new_val,
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share::ObAutoincrementService &auto_service,
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share::AutoincParam *autoinc_param,
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ObPhysicalPlanCtx *plan_ctx);
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// get the input value && check need generate
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static int get_input_value(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum *input_value,
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share::AutoincParam &autoinc_param,
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bool &is_to_generate,
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uint64_t &casted_value);
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static int get_casted_value_by_result_type(common::ObCastCtx &cast_ctx,
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common::ObObjType result_type,
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const common::ObObj ¶m,
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uint64_t &casted_value,
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bool &try_sync);
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprAutoincNextval);
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};
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// used in expr.extra_ to pass in table and column info
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struct ObAutoincNextvalExtra
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{
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OB_UNIS_VERSION_V(1);
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public:
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ObAutoincNextvalExtra()
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: autoinc_table_id_(common::OB_INVALID_ID),
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autoinc_col_id_(common::OB_INVALID_ID),
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autoinc_table_name_(),
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autoinc_column_name_()
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{}
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virtual ~ObAutoincNextvalExtra() {}
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static int init_autoinc_nextval_extra(common::ObIAllocator *allocator,
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ObRawExpr *&expr,
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const uint64_t autoinc_table_id,
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const uint64_t autoinc_col_id,
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const ObString autoinc_table_name,
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const ObString autoinc_column_name);
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TO_STRING_KV(K_(autoinc_table_id),
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K_(autoinc_col_id),
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K_(autoinc_table_name),
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K_(autoinc_column_name));
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uint64_t autoinc_table_id_;
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uint64_t autoinc_col_id_;
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ObString autoinc_table_name_;
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ObString autoinc_column_name_;
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};
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// used in ObExprAutoincNextval to pass in table and column info
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struct ObAutoincNextvalInfo : public ObIExprExtraInfo
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{
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OB_UNIS_VERSION(1);
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public:
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ObAutoincNextvalInfo(common::ObIAllocator &alloc, ObExprOperatorType type)
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: ObIExprExtraInfo(alloc, type),
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autoinc_table_id_(common::OB_INVALID_ID),
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autoinc_col_id_(common::OB_INVALID_ID)
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{}
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virtual ~ObAutoincNextvalInfo() { }
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static int init_autoinc_nextval_info(common::ObIAllocator *allocator,
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const ObRawExpr &raw_expr,
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ObExpr &expr,
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const ObExprOperatorType type);
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virtual int deep_copy(common::ObIAllocator &allocator,
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const ObExprOperatorType type,
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ObIExprExtraInfo *&copied_info) const override;
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TO_STRING_KV(K_(autoinc_table_id), K_(autoinc_col_id));
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uint64_t autoinc_table_id_;
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uint64_t autoinc_col_id_;
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};
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}//end namespace sql
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}//end namespace oceanbase
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#endif
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