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oceanbase/src/sql/engine/expr/ob_expr_timezone.h
wangzelin.wzl 93a1074b0c patch 4.0
2022-10-24 17:57:12 +08:00

66 lines
2.1 KiB
C++

/**
* 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_SQL_ENGINE_EXPR_OB_EXPR_TIMEZONE_
#define OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_TIMEZONE_
#include "sql/engine/expr/ob_expr_operator.h"
namespace oceanbase
{
namespace sql
{
class ObExprBaseTimezone : public ObFuncExprOperator
{
public:
explicit ObExprBaseTimezone(common::ObIAllocator &alloc, ObExprOperatorType type,
const char *name, const bool is_sessiontimezone);
virtual ~ObExprBaseTimezone() {}
virtual int calc_result_type0(ObExprResType &type, common::ObExprTypeCtx &type_ctx) const;
private:
bool is_sessiontimezone_;
private:
DISALLOW_COPY_AND_ASSIGN(ObExprBaseTimezone);
};
class ObExprSessiontimezone : public ObExprBaseTimezone
{
public:
explicit ObExprSessiontimezone(common::ObIAllocator &alloc);
virtual ~ObExprSessiontimezone() {}
static int eval_session_timezone(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(ObExprSessiontimezone);
};
class ObExprDbtimezone : public ObExprBaseTimezone
{
public:
explicit ObExprDbtimezone(common::ObIAllocator &alloc);
virtual ~ObExprDbtimezone() {}
static int eval_db_timezone(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(ObExprDbtimezone);
};
}//sql
}//oceanbase
#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_TIMEZONE_ */