118 lines
3.9 KiB
C++
118 lines
3.9 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_EXPR_TIMESTAMP_H
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#define OCEANBASE_EXPR_TIMESTAMP_H
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#include "sql/engine/expr/ob_expr_operator.h"
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#include "sql/engine/expr/ob_expr_to_temporal_base.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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//note: this is oracle only function
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class ObExprSysTimestamp: public ObFuncExprOperator
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{
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public:
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explicit ObExprSysTimestamp(common::ObIAllocator &alloc);
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virtual ~ObExprSysTimestamp();
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virtual int calc_result_type0(ObExprResType &type, common::ObExprTypeCtx &type_ctx) const;
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static int eval_systimestamp(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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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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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprSysTimestamp);
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};
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//note: this is oracle only function
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class ObExprLocalTimestamp: public ObFuncExprOperator
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{
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public:
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explicit ObExprLocalTimestamp(common::ObIAllocator &alloc);
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virtual ~ObExprLocalTimestamp();
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virtual int calc_result_type0(ObExprResType &type, common::ObExprTypeCtx &type_ctx) const;
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static int eval_localtimestamp(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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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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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprLocalTimestamp);
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};
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//note: this is oracle only function
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class ObExprToTimestamp: public ObExprToTemporalBase
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{
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public:
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explicit ObExprToTimestamp(common::ObIAllocator &alloc)
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: ObExprToTemporalBase(alloc, T_FUN_SYS_TO_TIMESTAMP, N_TO_TIMESTAMP)
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{}
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virtual ~ObExprToTimestamp() {}
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int set_my_result_from_ob_time(common::ObExprCtx &expr_ctx,
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common::ObTime &ob_time,
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common::ObObj &result) const;
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common::ObObjType get_my_target_obj_type() const
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{
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return common::ObTimestampNanoType;
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}
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprToTimestamp);
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};
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//note: this is oracle only function
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class ObExprToTimestampTZ: public ObExprToTemporalBase
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{
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public:
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explicit ObExprToTimestampTZ(common::ObIAllocator &alloc)
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: ObExprToTemporalBase(alloc, T_FUN_SYS_TO_TIMESTAMP_TZ, N_TO_TIMESTAMP_TZ)
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{}
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virtual ~ObExprToTimestampTZ() {}
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int set_my_result_from_ob_time(common::ObExprCtx &expr_ctx,
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common::ObTime &ob_time,
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common::ObObj &result) const;
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common::ObObjType get_my_target_obj_type() const
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{
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return common::ObTimestampTZType;
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}
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprToTimestampTZ);
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};
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class ObExprTimestamp : public ObFuncExprOperator
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{
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public:
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explicit ObExprTimestamp(common::ObIAllocator &alloc);
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virtual ~ObExprTimestamp();
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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 common::ObCastMode get_cast_mode() const { return CM_NULL_ON_WARN;}
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static int calc_timestamp1(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &result);
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static int calc_timestamp2(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &result);
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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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//disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprTimestamp);
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};
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}
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}
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#endif // OCEANBASE_EXPR_TIMESTAMP_H
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