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src/sql/engine/expr/ob_expr_timezone.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_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;
virtual int calc_result0(common::ObObj& result, common::ObExprCtx& expr_ctx) const = 0;
private:
bool is_sessiontimezone_;
private:
DISALLOW_COPY_AND_ASSIGN(ObExprBaseTimezone);
};
class ObExprSessiontimezone : public ObExprBaseTimezone {
public:
explicit ObExprSessiontimezone(common::ObIAllocator& alloc);
virtual ~ObExprSessiontimezone()
{}
virtual int calc_result0(common::ObObj& result, common::ObExprCtx& expr_ctx) const;
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()
{}
virtual int calc_result0(common::ObObj& result, common::ObExprCtx& expr_ctx) const;
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);
};
} // namespace sql
} // namespace oceanbase
#endif /* OCEANBASE_SQL_ENGINE_EXPR_OB_EXPR_TIMEZONE_ */