init push
This commit is contained in:
oceanbase-admin
251
src/sql/engine/expr/ob_expr_timestamp_diff.cpp
Normal file
251
src/sql/engine/expr/ob_expr_timestamp_diff.cpp
Normal file
@ -0,0 +1,251 @@
|
||||
/**
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#define USING_LOG_PREFIX SQL_ENG
|
||||
|
||||
#include "sql/engine/expr/ob_expr_timestamp_diff.h"
|
||||
#include "lib/ob_date_unit_type.h"
|
||||
#include "lib/ob_name_def.h"
|
||||
#include "lib/timezone/ob_time_convert.h"
|
||||
#include "share/object/ob_obj_cast.h"
|
||||
#include "sql/session/ob_sql_session_info.h"
|
||||
#include "sql/engine/ob_exec_context.h"
|
||||
|
||||
namespace oceanbase {
|
||||
using namespace common;
|
||||
namespace sql {
|
||||
|
||||
ObExprTimeStampDiff::ObExprTimeStampDiff(ObIAllocator& alloc)
|
||||
: ObFuncExprOperator(alloc, T_FUN_SYS_TIME_STAMP_DIFF, N_TIME_STAMP_DIFF, 3, NOT_ROW_DIMENSION)
|
||||
{}
|
||||
|
||||
ObExprTimeStampDiff::~ObExprTimeStampDiff()
|
||||
{}
|
||||
|
||||
int ObExprTimeStampDiff::calc_result3(
|
||||
ObObj& result, const ObObj& unit, const ObObj& left, const ObObj& right, ObExprCtx& expr_ctx) const
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
if (OB_ISNULL(expr_ctx.my_session_)) {
|
||||
ret = OB_ERR_UNEXPECTED;
|
||||
LOG_WARN("session is NULL", K(ret));
|
||||
} else if (OB_UNLIKELY(left.is_null() || right.is_null())) {
|
||||
result.set_null();
|
||||
} else {
|
||||
TYPE_CHECK(unit, ObIntType);
|
||||
TYPE_CHECK(left, ObTimestampType);
|
||||
TYPE_CHECK(right, ObTimestampType);
|
||||
int64_t res = 0;
|
||||
bool is_null = false;
|
||||
ObDataTypeCastParams dtc_params = ObBasicSessionInfo::create_dtc_params((expr_ctx).my_session_);
|
||||
if (OB_FAIL(calc(res,
|
||||
is_null,
|
||||
unit.get_int(),
|
||||
left.get_timestamp(),
|
||||
right.get_timestamp(),
|
||||
expr_ctx.my_session_->get_timezone_info()))) {
|
||||
LOG_WARN("calc failed", K(ret), K(left), K(right), K(unit));
|
||||
} else if (is_null) {
|
||||
result.set_null();
|
||||
} else {
|
||||
result.set_int(res);
|
||||
}
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprTimeStampDiff::calc(int64_t& res, bool& is_null, int64_t unit_value, int64_t usec_left, int64_t usec_right,
|
||||
const ObTimeZoneInfo* tz_info)
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
is_null = false;
|
||||
if (ObTimeConverter::ZERO_DATETIME == usec_left || ObTimeConverter::ZERO_DATETIME == usec_right) {
|
||||
is_null = true;
|
||||
} else {
|
||||
int64_t delta = usec_right - usec_left;
|
||||
int64_t diff = 0;
|
||||
static const int64_t USECS_PER_WEEK = (USECS_PER_DAY * DAYS_PER_WEEK);
|
||||
static const int64_t USECS_PER_HOUR = (static_cast<int64_t>(USECS_PER_SEC) * SECS_PER_HOUR);
|
||||
static const int64_t USECS_PER_MIN = (USECS_PER_SEC * SECS_PER_MIN);
|
||||
switch (unit_value) {
|
||||
case DATE_UNIT_MICROSECOND: {
|
||||
res = delta;
|
||||
break;
|
||||
}
|
||||
case DATE_UNIT_SECOND: {
|
||||
res = delta / USECS_PER_SEC;
|
||||
break;
|
||||
}
|
||||
case DATE_UNIT_MINUTE: {
|
||||
res = delta / USECS_PER_MIN;
|
||||
break;
|
||||
}
|
||||
case DATE_UNIT_HOUR: {
|
||||
res = delta / USECS_PER_HOUR;
|
||||
break;
|
||||
}
|
||||
case DATE_UNIT_DAY: {
|
||||
res = delta / USECS_PER_DAY;
|
||||
break;
|
||||
}
|
||||
case DATE_UNIT_WEEK: {
|
||||
res = delta / USECS_PER_WEEK;
|
||||
break;
|
||||
}
|
||||
case DATE_UNIT_MONTH: {
|
||||
ret = calc_month_diff(usec_left, usec_right, tz_info, diff);
|
||||
res = diff;
|
||||
break;
|
||||
}
|
||||
case DATE_UNIT_QUARTER: {
|
||||
ret = calc_month_diff(usec_left, usec_right, tz_info, diff);
|
||||
res = diff / MONS_PER_QUAR;
|
||||
break;
|
||||
}
|
||||
case DATE_UNIT_YEAR: {
|
||||
ret = calc_month_diff(usec_left, usec_right, tz_info, diff);
|
||||
res = diff / MONS_PER_YEAR;
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
ret = OB_INVALID_ARGUMENT;
|
||||
LOG_WARN("Invalid argument", K(ret), K(usec_left), K(usec_right), K(unit_value));
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprTimeStampDiff::adjust_sub_one(const ObTime* p_min, const ObTime* p_max, int64_t& bias)
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
bias = 0;
|
||||
if (OB_ISNULL(p_min) || OB_ISNULL(p_max)) {
|
||||
ret = OB_ERR_UNEXPECTED;
|
||||
LOG_ERROR("Pointer(s) is null!", K(ret), K(p_min), K(p_max));
|
||||
} else if (p_max->parts_[DT_MDAY] < p_min->parts_[DT_MDAY]) {
|
||||
// 2010-02-10 VS 2010-02-09
|
||||
bias = -1;
|
||||
} else if (p_max->parts_[DT_MDAY] > p_min->parts_[DT_MDAY]) {
|
||||
// 2010-02-10 VS 2010-02-19
|
||||
// do nothing
|
||||
} else if (p_max->parts_[DT_HOUR] < p_min->parts_[DT_HOUR]) {
|
||||
// 2010-02-19 12:00 VS 2010-02-19 11:00
|
||||
bias = -1;
|
||||
} else if (p_max->parts_[DT_HOUR] > p_min->parts_[DT_HOUR]) {
|
||||
// 2010-02-19 12:00 VS 2010-02-19 13:00
|
||||
// do nothing
|
||||
} else if (p_max->parts_[DT_MIN] < p_min->parts_[DT_MIN]) {
|
||||
// 2010-02-19 12:10 VS 2010-02-19 12:08
|
||||
bias = -1;
|
||||
} else if (p_max->parts_[DT_MIN] > p_min->parts_[DT_MIN]) {
|
||||
// 2010-02-19 12:10 VS 2010-02-19 12:15
|
||||
// do nothing
|
||||
} else if (p_max->parts_[DT_SEC] < p_min->parts_[DT_SEC]) {
|
||||
// 2010-02-19 12:15:18 VS 2010-02-19 12:15:16
|
||||
bias = -1;
|
||||
} else if (p_max->parts_[DT_SEC] > p_min->parts_[DT_SEC]) {
|
||||
// 2010-02-19 12:15:18 VS 2010-02-19 12:15:19
|
||||
// do nothing
|
||||
} else if (p_max->parts_[DT_USEC] < p_min->parts_[DT_USEC]) {
|
||||
bias = -1;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprTimeStampDiff::calc_month_diff(
|
||||
const int64_t& left, const int64_t& right, const ObTimeZoneInfo* tz_info, int64_t& diff)
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
diff = 0;
|
||||
ObTime ot_left;
|
||||
ObTime ot_right;
|
||||
if (OB_FAIL(ObTimeConverter::datetime_to_ob_time(left, tz_info, ot_left))) {
|
||||
LOG_WARN("failed to cast to ob_time", K(ret), K(left));
|
||||
} else if (OB_FAIL(ObTimeConverter::datetime_to_ob_time(right, tz_info, ot_right))) {
|
||||
LOG_WARN("failed to cast to ob_time", K(ret), K(right));
|
||||
} else {
|
||||
int64_t month_right = (ot_right.parts_[DT_YEAR]) * MONS_PER_YEAR + ot_right.parts_[DT_MON];
|
||||
int64_t month_left = (ot_left.parts_[DT_YEAR]) * MONS_PER_YEAR + ot_left.parts_[DT_MON];
|
||||
ObTime* p_min = NULL;
|
||||
ObTime* p_max = NULL;
|
||||
int sign = 1;
|
||||
if (month_right >= month_left) {
|
||||
// like 2010-01-01 VS 2011-01-01
|
||||
p_min = &ot_left;
|
||||
p_max = &ot_right;
|
||||
diff = month_right - month_left;
|
||||
} else {
|
||||
// like 2012-01-01 VS 2011-01-01
|
||||
p_min = &ot_right;
|
||||
p_max = &ot_left;
|
||||
diff = month_left - month_right;
|
||||
sign = -1;
|
||||
}
|
||||
// interval of 2011-03-01 and 2011-01-04 should be 2 not 3
|
||||
// so we have to adjust the diff to be right value
|
||||
int64_t bias = 0;
|
||||
if (0 != diff && OB_SUCC(adjust_sub_one(p_min, p_max, bias))) {
|
||||
diff += bias;
|
||||
diff *= sign;
|
||||
}
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprTimeStampDiff::eval_timestamp_diff(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res)
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
ObDatum* u = NULL;
|
||||
ObDatum* l = NULL;
|
||||
ObDatum* r = NULL;
|
||||
const ObSQLSessionInfo* session = ctx.exec_ctx_.get_my_session();
|
||||
if (OB_ISNULL(session)) {
|
||||
ret = OB_ERR_UNEXPECTED;
|
||||
LOG_WARN("session is NULL", K(ret));
|
||||
} else if (OB_FAIL(expr.eval_param_value(ctx, u, l, r))) {
|
||||
LOG_WARN("eval arg failed", K(ret));
|
||||
} else if (u->is_null()) {
|
||||
ret = OB_ERR_UNEXPECTED;
|
||||
LOG_WARN("unit cannot be null", K(ret));
|
||||
} else if (l->is_null() || r->is_null()) {
|
||||
res.set_null();
|
||||
} else {
|
||||
int64_t res_int = 0;
|
||||
bool is_null = false;
|
||||
if (OB_FAIL(calc(
|
||||
res_int, is_null, u->get_int(), l->get_timestamp(), r->get_timestamp(), session->get_timezone_info()))) {
|
||||
LOG_WARN("calc failed", K(ret));
|
||||
} else if (is_null) {
|
||||
res.set_null();
|
||||
} else {
|
||||
res.set_int(res_int);
|
||||
}
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ObExprTimeStampDiff::cg_expr(ObExprCGCtx& ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
|
||||
{
|
||||
int ret = OB_SUCCESS;
|
||||
UNUSED(ctx);
|
||||
UNUSED(raw_expr);
|
||||
CK(3 == rt_expr.arg_cnt_);
|
||||
CK(ObIntType == rt_expr.args_[0]->datum_meta_.type_ && ObTimestampType == rt_expr.args_[1]->datum_meta_.type_ &&
|
||||
ObTimestampType == rt_expr.args_[2]->datum_meta_.type_);
|
||||
OX(rt_expr.eval_func_ = eval_timestamp_diff);
|
||||
return ret;
|
||||
}
|
||||
|
||||
} // namespace sql
|
||||
} // namespace oceanbase
|
||||
Reference in New Issue
Block a user