49 lines
1.7 KiB
C++
49 lines
1.7 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_SQL_OB_EXPR_FUNC_SLEEP_H_
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#define _OCEANBASE_SQL_OB_EXPR_FUNC_SLEEP_H_
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#include "lib/ob_name_def.h"
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#include "share/object/ob_obj_cast.h"
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#include "sql/engine/expr/ob_expr_operator.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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class ObExprSleep : public ObFuncExprOperator
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{
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public:
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explicit ObExprSleep(common::ObIAllocator &alloc);
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virtual ~ObExprSleep();
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virtual int calc_result_type1(ObExprResType &type,
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ObExprResType ¶m,
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common::ObExprTypeCtx &type_ctx) const;
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static int eval_sleep(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
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virtual int cg_expr(ObExprCGCtx &ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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private:
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static const int64_t CHECK_INTERVAL_IN_US = 100 * 1000LL;
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static const int64_t SCALE_OF_SECOND = 9;//ns
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private:
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static int sleep(int64_t usec);
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static int get_usec(const common::number::ObNumber &nmb, int64_t &value,
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common::ObIAllocator &alloc);
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprSleep);
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};
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} //sql
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} //oceanbase
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#endif //_OCEANBASE_SQL_OB_EXPR_FUNC_SLEEP_H_
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