91 lines
3.1 KiB
C++
91 lines
3.1 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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namespace sql {
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// note: this is oracle only function
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class ObExprSysTimestamp : public ObFuncExprOperator {
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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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virtual int calc_result0(common::ObObj& result, common::ObExprCtx& expr_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, const ObRawExpr& raw_expr, 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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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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virtual int calc_result0(common::ObObj& result, common::ObExprCtx& expr_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, const ObRawExpr& raw_expr, 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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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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{}
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int set_my_result_from_ob_time(common::ObExprCtx& expr_ctx, common::ObTime& ob_time, 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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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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{}
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int set_my_result_from_ob_time(common::ObExprCtx& expr_ctx, common::ObTime& ob_time, 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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} // namespace sql
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} // namespace oceanbase
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#endif // OCEANBASE_EXPR_TIMESTAMP_H
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