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2021-05-31 22:56:52 +08:00
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src/sql/engine/expr/ob_expr_timestamp.h Normal file
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#ifndef OCEANBASE_EXPR_TIMESTAMP_H
#define OCEANBASE_EXPR_TIMESTAMP_H
#include "sql/engine/expr/ob_expr_operator.h"
#include "sql/engine/expr/ob_expr_to_temporal_base.h"
namespace oceanbase {
namespace sql {
// note: this is oracle only function
class ObExprSysTimestamp : public ObFuncExprOperator {
public:
explicit ObExprSysTimestamp(common::ObIAllocator& alloc);
virtual ~ObExprSysTimestamp();
virtual int calc_result_type0(ObExprResType& type, common::ObExprTypeCtx& type_ctx) const;
virtual int calc_result0(common::ObObj& result, common::ObExprCtx& expr_ctx) const;
static int eval_systimestamp(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
private:
DISALLOW_COPY_AND_ASSIGN(ObExprSysTimestamp);
};
// note: this is oracle only function
class ObExprLocalTimestamp : public ObFuncExprOperator {
public:
explicit ObExprLocalTimestamp(common::ObIAllocator& alloc);
virtual ~ObExprLocalTimestamp();
virtual int calc_result_type0(ObExprResType& type, common::ObExprTypeCtx& type_ctx) const;
virtual int calc_result0(common::ObObj& result, common::ObExprCtx& expr_ctx) const;
static int eval_localtimestamp(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
private:
DISALLOW_COPY_AND_ASSIGN(ObExprLocalTimestamp);
};
// note: this is oracle only function
class ObExprToTimestamp : public ObExprToTemporalBase {
public:
explicit ObExprToTimestamp(common::ObIAllocator& alloc)
: ObExprToTemporalBase(alloc, T_FUN_SYS_TO_TIMESTAMP, N_TO_TIMESTAMP)
{}
virtual ~ObExprToTimestamp()
{}
int set_my_result_from_ob_time(common::ObExprCtx& expr_ctx, common::ObTime& ob_time, common::ObObj& result) const;
common::ObObjType get_my_target_obj_type() const
{
return common::ObTimestampNanoType;
}
private:
DISALLOW_COPY_AND_ASSIGN(ObExprToTimestamp);
};
// note: this is oracle only function
class ObExprToTimestampTZ : public ObExprToTemporalBase {
public:
explicit ObExprToTimestampTZ(common::ObIAllocator& alloc)
: ObExprToTemporalBase(alloc, T_FUN_SYS_TO_TIMESTAMP_TZ, N_TO_TIMESTAMP_TZ)
{}
virtual ~ObExprToTimestampTZ()
{}
int set_my_result_from_ob_time(common::ObExprCtx& expr_ctx, common::ObTime& ob_time, common::ObObj& result) const;
common::ObObjType get_my_target_obj_type() const
{
return common::ObTimestampTZType;
}
private:
DISALLOW_COPY_AND_ASSIGN(ObExprToTimestampTZ);
};
} // namespace sql
} // namespace oceanbase
#endif // OCEANBASE_EXPR_TIMESTAMP_H