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src/sql/engine/expr/ob_expr_timestamp_add.cpp 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.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "sql/engine/expr/ob_expr_timestamp_add.h"
#include "sql/engine/expr/ob_expr_add.h"
#include "sql/engine/expr/ob_expr_mul.h"
#include "sql/engine/expr/ob_datum_cast.h"
#include "sql/engine/ob_exec_context.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 "common/sql_mode/ob_sql_mode_utils.h"
namespace oceanbase {
using namespace common;
namespace sql {
ObExprTimeStampAdd::ObExprTimeStampAdd(ObIAllocator& alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_TIME_STAMP_ADD, N_TIME_STAMP_ADD, 3, NOT_ROW_DIMENSION)
{}
ObExprTimeStampAdd::~ObExprTimeStampAdd()
{}
inline int ObExprTimeStampAdd::calc_result_type3(ObExprResType& type, ObExprResType& unit, ObExprResType& interval,
ObExprResType& timestamp, common::ObExprTypeCtx& type_ctx) const
{
UNUSED(type_ctx);
UNUSED(unit);
UNUSED(interval);
UNUSED(timestamp);
int ret = OB_SUCCESS;
ObCompatibilityMode compat_mode = get_compatibility_mode();
// not timestamp. compatible with mysql.
type.set_varchar();
type.set_length(common::ObAccuracy::MAX_ACCURACY2[compat_mode][common::ObTimestampType].precision_ +
common::ObAccuracy::MAX_ACCURACY2[compat_mode][common::ObTimestampType].scale_ + 1);
type.set_collation_level(common::CS_LEVEL_IMPLICIT);
// not connection collation. compatible with mysql.
type.set_collation_type(common::ObCharset::get_default_collation(common::ObCharset::get_default_charset()));
unit.set_calc_type(ObIntType);
const ObSQLSessionInfo* session = dynamic_cast<const ObSQLSessionInfo*>(type_ctx.get_session());
if (OB_ISNULL(session)) {
LOG_WARN("cast basic session to sql session failed", K(ret));
} else if (session->use_static_typing_engine()) {
interval.set_calc_type(ObIntType);
}
return ret;
}
int ObExprTimeStampAdd::calc_result3(
ObObj& result, const ObObj& unit, const ObObj& interval, const ObObj& timestamp, ObExprCtx& expr_ctx) const
{
int ret = OB_SUCCESS;
ObCastMode cast_mode = expr_ctx.cast_mode_;
if (OB_ISNULL(expr_ctx.calc_buf_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected error. calc buffer is null", K(ret));
} else if (OB_UNLIKELY(unit.is_null() || interval.is_null() || timestamp.is_null())) {
result.set_null();
} else {
int64_t ts = 0;
int64_t interval_int = 0;
int64_t res = 0;
ObTime ot;
expr_ctx.cast_mode_ &= ~(CM_WARN_ON_FAIL);
EXPR_DEFINE_CAST_CTX(expr_ctx, CM_NONE);
EXPR_GET_INT64_V2(interval, interval_int);
ObTimeConvertCtx cvrt_ctx(get_timezone_info(expr_ctx.my_session_), true);
if (OB_SUCC(ret)) {
if (OB_FAIL(ob_obj_to_ob_time_with_date(timestamp, cvrt_ctx.tz_info_, ot))) {
LOG_WARN("cast to ob time failed", K(ret), K(timestamp), K(expr_ctx.cast_mode_));
} else if (OB_FAIL(ObTimeConverter::ob_time_to_datetime(ot, cvrt_ctx, ts))) {
LOG_WARN("ob time to datetime failed", K(ret));
} else if (OB_FAIL(calc(unit.get_int(), ot, ts, cvrt_ctx, interval_int, res))) {
LOG_WARN("calc failed", K(ret), K(unit), K(ts), K(interval_int));
} else {
ObObj tmp;
tmp.set_timestamp(res);
ObString result_string;
EXPR_GET_VARCHAR_V2(tmp, result_string);
if (OB_SUCC(ret)) {
result.set_varchar(result_string);
result.set_collation(result_type_);
}
}
}
}
if (OB_FAIL(ret)) {
check_reset_status(cast_mode, ret, result);
}
return ret;
}
void ObExprTimeStampAdd::check_reset_status(const ObCastMode cast_mode, int& ret, ObObj& result)
{
if (OB_FAIL(ret)) {
if (CM_IS_WARN_ON_FAIL(cast_mode)) {
ret = OB_SUCCESS;
result.set_null();
}
}
}
int ObExprTimeStampAdd::calc(const int64_t unit_value, ObTime& ot, const int64_t ts, const ObTimeConvertCtx& cvrt_ctx,
int64_t interval, int64_t& value)
{
int ret = OB_SUCCESS;
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);
static const int64_t MONTH_PER_QUARTER = 3;
int64_t quota = -1;
int64_t delta = 0;
switch (unit_value) {
case DATE_UNIT_MICROSECOND: {
quota = 1;
// fall through
}
case DATE_UNIT_SECOND: {
quota = (-1 == quota ? USECS_PER_SEC : quota);
// fall through
}
case DATE_UNIT_MINUTE: {
quota = (-1 == quota ? USECS_PER_MIN : quota);
// fall through
}
case DATE_UNIT_HOUR: {
quota = (-1 == quota ? USECS_PER_HOUR : quota);
// fall through
}
case DATE_UNIT_DAY: {
quota = (-1 == quota ? USECS_PER_DAY : quota);
// fall through
}
case DATE_UNIT_WEEK: {
quota = (-1 == quota ? USECS_PER_WEEK : quota);
if (ObExprMul::is_mul_out_of_range(interval, quota, delta)) {
ret = OB_DATETIME_FUNCTION_OVERFLOW;
LOG_WARN("timestamp value is out of range", K(ret), K(quota), K(interval), K(ts), K(delta), K(value));
} else {
if (ObExprAdd::is_add_out_of_range(ts, delta, value)) {
ret = OB_DATETIME_FUNCTION_OVERFLOW;
LOG_WARN("timestamp value is out of range", K(ret), K(quota), K(interval), K(ts), K(delta), K(value));
}
}
break;
}
case DATE_UNIT_MONTH: {
// select timestampadd(month, 3, "2010-08-01 11:11:11");
// diff_month = 3
// so, result == 2010-08-01 11:11:11 + 3 month == 2010-11-01 11:11:11
delta = interval;
int32_t month = static_cast<int32_t>((ot.parts_[DT_YEAR]) * (MONS_PER_YEAR) + ot.parts_[DT_MON] - 1);
if (OB_UNLIKELY(ObExprAdd::is_add_out_of_range(month, delta, month))) {
ret = OB_DATETIME_FUNCTION_OVERFLOW;
LOG_WARN("timestamp value is out of range", K(ret), K(ts), K(month), K(interval));
} else {
ot.parts_[DT_YEAR] = month / 12;
ot.parts_[DT_MON] = month % 12 + 1;
ot.parts_[DT_DATE] = ObTimeConverter::ob_time_to_date(ot);
if (OB_FAIL(ObTimeConverter::ob_time_to_datetime(ot, cvrt_ctx, value))) {
LOG_WARN("ob time to datetime failed", K(ret));
}
}
break;
}
case DATE_UNIT_QUARTER: {
// select timestampadd(quarter, -2, "2010-11-01 11:11:11");
// diff_month = -2 * MONTH_PER_QUARTER = -2 *3 = -6
// so, result == 2010-11-01 11:11:11 + (- 6 month) == 2010-05-01 11:11:11
int32_t month = static_cast<int32_t>((ot.parts_[DT_YEAR]) * MONS_PER_YEAR + (ot.parts_[DT_MON] - 1));
if (OB_UNLIKELY(ObExprMul::is_mul_out_of_range(interval, MONTH_PER_QUARTER, delta))) {
ret = OB_DATETIME_FUNCTION_OVERFLOW;
LOG_WARN("timestamp value is out of range", K(ret), K(ts), K(month), K(interval));
} else if (OB_UNLIKELY(ObExprAdd::is_add_out_of_range(month, delta, month))) {
ret = OB_DATETIME_FUNCTION_OVERFLOW;
LOG_WARN("timestamp value is out of range", K(ret), K(ts), K(month), K(interval));
} else {
// IMHO, no need to define 12 as MONTH_PER_YEAR here.
ot.parts_[DT_YEAR] = month / 12;
ot.parts_[DT_MON] = month % 12 + 1;
ot.parts_[DT_DATE] = ObTimeConverter::ob_time_to_date(ot);
if (OB_FAIL(ObTimeConverter::ob_time_to_datetime(ot, cvrt_ctx, value))) {
LOG_WARN("ob time to datetime failed", K(ret));
}
}
break;
}
case DATE_UNIT_YEAR: {
delta = interval;
if (OB_UNLIKELY(ObExprAdd::is_add_out_of_range(ot.parts_[DT_YEAR], delta, ot.parts_[DT_YEAR]))) {
ret = OB_DATETIME_FUNCTION_OVERFLOW;
LOG_WARN("timestamp value is out of range", K(ret), K(ts), K(ot.parts_[DT_YEAR]), K(interval));
} else {
ot.parts_[DT_DATE] = ObTimeConverter::ob_time_to_date(ot);
if (OB_FAIL(ObTimeConverter::ob_time_to_datetime(ot, cvrt_ctx, value))) {
LOG_WARN("ob time to datetime failed", K(ret));
}
}
break;
}
default: {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("Invalid argument", K(ret), K(unit_value));
break;
}
}
return ret;
}
int calc_timestampadd_expr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum)
{
int ret = OB_SUCCESS;
const ObSQLSessionInfo* session = ctx.exec_ctx_.get_my_session();
ObDatum* unit_datum = NULL;
ObDatum* interval_datum = NULL;
ObDatum* timestamp_datum = NULL;
if (OB_ISNULL(session)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is NULL", K(ret));
} else if (OB_FAIL(expr.args_[0]->eval(ctx, unit_datum)) || OB_FAIL(expr.args_[1]->eval(ctx, interval_datum)) ||
OB_FAIL(expr.args_[2]->eval(ctx, timestamp_datum))) {
LOG_WARN("eval arg failed", K(ret), KP(unit_datum), KP(interval_datum), KP(timestamp_datum));
} else if (unit_datum->is_null() || interval_datum->is_null() || timestamp_datum->is_null()) {
res_datum.set_null();
} else {
int64_t ts = 0;
int64_t interval_int = interval_datum->get_int();
int64_t res = 0;
ObTime ot;
ObTimeConvertCtx cvrt_ctx(get_timezone_info(ctx.exec_ctx_.get_my_session()), true);
char* buf = NULL;
int64_t buf_len = OB_CAST_TO_VARCHAR_MAX_LENGTH;
int64_t out_len = 0;
if (OB_FAIL(ob_datum_to_ob_time_with_date(*timestamp_datum,
expr.args_[2]->datum_meta_.type_,
cvrt_ctx.tz_info_,
ot,
get_cur_time(ctx.exec_ctx_.get_physical_plan_ctx())))) {
LOG_WARN("cast to ob time failed", K(ret), K(*timestamp_datum));
} else if (OB_FAIL(ObTimeConverter::ob_time_to_datetime(ot, cvrt_ctx, ts))) {
LOG_WARN("ob time to datetime failed", K(ret));
} else if (OB_FAIL(ObExprTimeStampAdd::calc(unit_datum->get_int(), ot, ts, cvrt_ctx, interval_int, res))) {
LOG_WARN("calc failed", K(ret), K(*unit_datum), K(ts), K(interval_int));
} else if (OB_ISNULL(buf = expr.get_str_res_mem(ctx, buf_len))) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("allocate memory failed", K(ret), K(buf_len));
} else if (OB_FAIL(common_datetime_string(ObTimestampType,
ObVarcharType,
expr.args_[2]->datum_meta_.scale_,
false,
res,
ctx,
buf,
buf_len,
out_len))) {
LOG_WARN("common_datetime_string failed", K(ret), K(res), K(expr));
} else {
res_datum.set_string(ObString(out_len, buf));
}
}
if (OB_FAIL(ret) && OB_NOT_NULL(session)) {
uint64_t cast_mode = 0;
if (OB_FAIL(ObSQLUtils::get_default_cast_mode(session->get_stmt_type(), session, cast_mode))) {
LOG_WARN("get_default_cast_mode failed", K(ret), K(session->get_stmt_type()));
} else if (CM_IS_WARN_ON_FAIL(cast_mode)) {
ret = OB_SUCCESS;
res_datum.set_null();
}
}
return ret;
}
int ObExprTimeStampAdd::cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
{
int ret = OB_SUCCESS;
UNUSED(expr_cg_ctx);
UNUSED(raw_expr);
rt_expr.eval_func_ = calc_timestampadd_expr;
return ret;
}
} // namespace sql
} // namespace oceanbase