hcq/oceanbase
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

init push

Browse Source
This commit is contained in:
oceanbase-admin
2021-05-31 22:56:52 +08:00
commit cea7de1475
7020 changed files with 5689869 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

77
src/sql/engine/expr/ob_expr_time_diff.h Normal file
View File

@ -0,0 +1,77 @@
/**
* 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_OB_EXPR_TIME_DIFF_H_
#define _OCEANBASE_SQL_OB_EXPR_TIME_DIFF_H_
#include "lib/timezone/ob_time_convert.h"
#include "lib/ob_name_def.h"
#include "share/object/ob_obj_cast.h"
#include "sql/engine/expr/ob_expr_operator.h"
namespace oceanbase {
namespace sql {
class ObExprTimeDiff : public ObFuncExprOperator {
public:
explicit ObExprTimeDiff(common::ObIAllocator& alloc);
virtual ~ObExprTimeDiff();
virtual int calc_result_type2(
ObExprResType& type, ObExprResType& left, ObExprResType& right, common::ObExprTypeCtx& type_ctx) const;
static int calc(
common::ObObj& result, const common::ObObj& left, const common::ObObj& right, common::ObCastCtx& cast_ctx);
virtual int calc_result2(
common::ObObj& result, const common::ObObj& left, const common::ObObj& right, common::ObExprCtx& expr_ctx) const;
virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
static int calc_timediff(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
private:
static int get_diff_value(
const common::ObObj& obj1, const common::ObObj& obj2, const common::ObTimeZoneInfo* tz_info, int64_t& diff);
static int get_diff_value_with_ob_time(
common::ObTime& ot1, common::ObTime& ot2, const common::ObTimeZoneInfo* tz_info, int64_t& diff);
// disallow copy
DISALLOW_COPY_AND_ASSIGN(ObExprTimeDiff);
};
inline int ObExprTimeDiff::calc_result_type2(
ObExprResType& type, ObExprResType& left, ObExprResType& right, common::ObExprTypeCtx& type_ctx) const
{
// TODO actually ,the source of the objs will bring up different results
// if obj is constant and of string type.
// e.g. select timediff("12:34:56.123", "13:33:22.34567");
// then the scale of result type will be 5 (the larger one)
// if obj comes from a column of a table , then the scale of result type will be 6
// no matter what the scale of objs is.
// e.g. select timediff(tableA.left,tableB.right) from tableA,tableB
// when left and right are both STRING type(varchar)
// the scale of result type may be 6, always.
int ret = common::OB_SUCCESS;
common::ObScale scale = static_cast<common::ObScale>(common::max(left.get_scale(), right.get_scale()));
if (scale > common::MAX_SCALE_FOR_TEMPORAL) {
scale = common::MAX_SCALE_FOR_TEMPORAL;
}
if (ob_is_enumset_tc(left.get_type())) {
left.set_calc_type(common::ObVarcharType);
scale = common::MAX_SCALE_FOR_TEMPORAL;
}
if (ob_is_enumset_tc(right.get_type())) {
right.set_calc_type(common::ObVarcharType);
scale = common::MAX_SCALE_FOR_TEMPORAL;
}
type.set_time();
type.set_scale(scale);
UNUSED(type_ctx);
return ret;
}
} // namespace sql
} // namespace oceanbase
#endif //_OCEANBASE_SQL_OB_EXPR_TIME_DIFF_H_