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oceanbase/src/sql/engine/expr/ob_expr_cur_time.cpp
wangzelin.wzl 93a1074b0c patch 4.0
2022-10-24 17:57:12 +08:00

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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_cur_time.h"
#include "lib/ob_name_def.h"
#include "lib/timezone/ob_time_convert.h"
#include "sql/engine/ob_physical_plan_ctx.h"
#include "sql/session/ob_sql_session_info.h"
#include "share/system_variable/ob_system_variable.h"
#include "sql/engine/ob_physical_plan_ctx.h"
#include "sql/engine/ob_exec_context.h"
namespace oceanbase
{
using namespace common;
using namespace share;
namespace sql
{
ObExprUtcTimestamp::ObExprUtcTimestamp(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_UTC_TIMESTAMP, N_UTC_TIMESTAMP, 0, NOT_ROW_DIMENSION)
{
}
ObExprUtcTimestamp::~ObExprUtcTimestamp()
{
}
int ObExprUtcTimestamp::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
type.set_datetime();
type.set_result_flag(NOT_NULL_FLAG);
if (type.get_scale() < MIN_SCALE_FOR_TEMPORAL) {
type.set_scale(MIN_SCALE_FOR_TEMPORAL);
}
return OB_SUCCESS;
}
int ObExprUtcTimestamp::eval_utc_timestamp(const ObExpr &expr, ObEvalCtx &ctx,
ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(ctx.exec_ctx_.get_physical_plan_ctx())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expr_ctx.phy_plan_ctx_ is null", K(ret));
} else if (OB_UNLIKELY(!ctx.exec_ctx_.get_physical_plan_ctx()->has_cur_time())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("physical plan context don't have current time value");
} else {
int64_t ts_value = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time().get_timestamp();
ObTimeConverter::trunc_datetime(expr.datum_meta_.scale_, ts_value);
expr_datum.set_datetime(ts_value);
}
return ret;
}
int ObExprUtcTimestamp::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(raw_expr);
UNUSED(op_cg_ctx);
rt_expr.eval_func_ = ObExprUtcTimestamp::eval_utc_timestamp;
return OB_SUCCESS;
}
ObExprUtcTime::ObExprUtcTime(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_UTC_TIME, N_UTC_TIME, 0, NOT_ROW_DIMENSION)
{
}
ObExprUtcTime::~ObExprUtcTime()
{
}
int ObExprUtcTime::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
type.set_time();
type.set_result_flag(NOT_NULL_FLAG);
if (type.get_scale() < MIN_SCALE_FOR_TEMPORAL) {
type.set_scale(MIN_SCALE_FOR_TEMPORAL);
}
return OB_SUCCESS;
}
int ObExprUtcTime::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(raw_expr);
UNUSED(op_cg_ctx);
rt_expr.eval_func_ = ObExprUtcTime::eval_utc_time;
return OB_SUCCESS;
}
int ObExprUtcTime::eval_utc_time(const ObExpr &expr, ObEvalCtx &ctx,
ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(ctx.exec_ctx_.get_physical_plan_ctx())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expr_ctx.phy_plan_ctx_ is null", K(ret));
} else if (OB_UNLIKELY(!ctx.exec_ctx_.get_physical_plan_ctx()->has_cur_time())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("physical plan context don't have current time value");
} else {
int64_t ts_value = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time().get_timestamp();
int64_t t_value = 0;
if (OB_FAIL(ObTimeConverter::datetime_to_time(ts_value, NULL /* tz_info */, t_value))) {
LOG_WARN("failed to convert datetime to time", K(ret));
} else {
ObTimeConverter::trunc_datetime(expr.datum_meta_.scale_, t_value);
expr_datum.set_time(t_value);
}
}
return ret;
}
ObExprUtcDate::ObExprUtcDate(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_UTC_DATE, N_UTC_DATE, 0, NOT_ROW_DIMENSION)
{
}
ObExprUtcDate::~ObExprUtcDate()
{
}
int ObExprUtcDate::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
type.set_date();
type.set_result_flag(NOT_NULL_FLAG);
type.set_scale(0);
return OB_SUCCESS;
}
int ObExprUtcDate::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(raw_expr);
UNUSED(op_cg_ctx);
rt_expr.eval_func_ = ObExprUtcDate::eval_utc_date;
return OB_SUCCESS;
}
int ObExprUtcDate::eval_utc_date(const ObExpr &expr, ObEvalCtx &ctx,
ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
UNUSED(expr);
if (OB_ISNULL(ctx.exec_ctx_.get_physical_plan_ctx())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expr_ctx.phy_plan_ctx_ is null", K(ret));
} else if (OB_UNLIKELY(!ctx.exec_ctx_.get_physical_plan_ctx()->has_cur_time())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("physical plan context don't have current time value");
} else {
int64_t ts_value = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time().get_timestamp();
int32_t d_value = 0;
if (OB_FAIL(ObTimeConverter::datetime_to_date(ts_value, NULL /* tz_info */, d_value))) {
LOG_WARN("failed to convert datetime to date", K(ret));
} else {
expr_datum.set_date(d_value);
}
}
return ret;
}
ObExprCurTimestamp::ObExprCurTimestamp(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_CUR_TIMESTAMP, N_CUR_TIMESTAMP, 0, NOT_ROW_DIMENSION)
{
}
ObExprCurTimestamp::~ObExprCurTimestamp()
{
}
int ObExprCurTimestamp::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
if (lib::is_oracle_mode()) {
type.set_timestamp_tz();
} else {
type.set_datetime();
}
if (type.get_scale() < MIN_SCALE_FOR_TEMPORAL) {
type.set_scale(MIN_SCALE_FOR_TEMPORAL);
}
return OB_SUCCESS;
}
int ObExprCurTimestamp::eval_cur_timestamp(const ObExpr &expr, ObEvalCtx &ctx,
ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(ctx.exec_ctx_.get_physical_plan_ctx())
|| OB_ISNULL(ctx.exec_ctx_.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("phy_plan_ctx_ my_session_ or is null",
"phy_plan_ctx", ctx.exec_ctx_.get_physical_plan_ctx(), K(ret));
} else if (OB_UNLIKELY(!ctx.exec_ctx_.get_physical_plan_ctx()->has_cur_time())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("physical plan context don't have current time value");
} else {
int64_t ts_value = 0;
int64_t dt_value = 0;
if (lib::is_oracle_mode()) {
ts_value = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time_tardy_value();
//oracle: return a timestamp with timezone value
ObOTimestampData ts_tz_value;
if (OB_FAIL(ObTimeConverter::timestamp_to_datetime(ts_value,
get_timezone_info(ctx.exec_ctx_.get_my_session()),
dt_value))) {
LOG_WARN("failed to convert timestamp to datetime", K(ret));
} else if (FALSE_IT(ObTimeConverter::trunc_datetime(expr.datum_meta_.scale_, dt_value))) {
} else if (OB_FAIL(ObTimeConverter::odate_to_otimestamp(dt_value,
get_timezone_info(ctx.exec_ctx_.get_my_session()),
ObTimestampTZType,
ts_tz_value))) {
LOG_WARN("failed to convert timestamp to datetime", K(ret));
} else {
expr_datum.set_otimestamp_tz(ts_tz_value);
}
} else {
ts_value = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time().get_timestamp();
if (OB_FAIL(ObTimeConverter::timestamp_to_datetime(ts_value,
get_timezone_info(ctx.exec_ctx_.get_my_session()),
dt_value))) {
LOG_WARN("failed to convert timestamp to datetime", K(ret));
} else {
ObTimeConverter::trunc_datetime(expr.datum_meta_.scale_, dt_value);
//mysql: return a datetime value
expr_datum.set_datetime(dt_value);
}
}
}
return ret;
}
int ObExprCurTimestamp::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(raw_expr);
UNUSED(op_cg_ctx);
rt_expr.eval_func_ = ObExprCurTimestamp::eval_cur_timestamp;
return OB_SUCCESS;
}
ObExprSysdate::ObExprSysdate(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_SYSDATE, N_SYSDATE, 0, NOT_ROW_DIMENSION)
{
}
ObExprSysdate::~ObExprSysdate()
{
}
int ObExprSysdate::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
type.set_datetime();
if (type.get_scale() < MIN_SCALE_FOR_TEMPORAL) {
type.set_scale(MIN_SCALE_FOR_TEMPORAL);
}
return OB_SUCCESS;
}
int ObExprSysdate::eval_sysdate(const ObExpr &expr, ObEvalCtx &ctx,
ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
UNUSED(expr);
const ObTimeZoneInfo *cur_tz_info = get_timezone_info(ctx.exec_ctx_.get_my_session());
if (OB_ISNULL(ctx.exec_ctx_.get_physical_plan_ctx())
|| OB_ISNULL(ctx.exec_ctx_.get_my_session())
|| OB_ISNULL(cur_tz_info)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("phy_plan_ctx_ or my_session_ or cur_tz_info is null",
"phy_plan_ctx", ctx.exec_ctx_.get_physical_plan_ctx(), K(cur_tz_info), K(ret));
} else {
int64_t utc_timestamp = 0;
ObTimeZoneInfoWrap tz_info_wrap;
if (lib::is_oracle_mode()) {
if (OB_UNLIKELY(!ctx.exec_ctx_.get_physical_plan_ctx()->has_cur_time())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("physical plan context don't have time value", K(ret));
} else {
utc_timestamp = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time().get_datetime();
ObString sys_time_zone;
const ObString OLD_SERVER_SYSTIMEZONE("CST");
if (OB_FAIL(ctx.exec_ctx_.get_my_session()->get_sys_variable(
share::SYS_VAR_SYSTEM_TIME_ZONE, sys_time_zone))) {
LOG_WARN("Get sys variable error", K(ret));
} else if (0 == sys_time_zone.case_compare(OLD_SERVER_SYSTIMEZONE)) {
LOG_DEBUG("sys_time_zone is CST, maybe from old server, use local value instead",
K(sys_time_zone), "local value", ObSpecialSysVarValues::system_time_zone_str_);
sys_time_zone = ObSpecialSysVarValues::system_time_zone_str_;
}
if (OB_SUCC(ret)) {
if (OB_FAIL(tz_info_wrap.init_time_zone(sys_time_zone, OB_INVALID_VERSION,
*(const_cast<ObTZInfoMap *>(cur_tz_info->get_tz_info_map()))))) {
LOG_WARN("tz_info_wrap init_time_zone fail", KR(ret), K(sys_time_zone));
} else {
cur_tz_info = tz_info_wrap.get_time_zone_info();
LOG_DEBUG("succ to get tz_info", K(sys_time_zone), K(cur_tz_info));
}
}
}
} else {
utc_timestamp = ObTimeUtility::current_time();
}
if (OB_SUCC(ret)) {
int64_t dt_value = 0;
if (OB_FAIL(ObTimeConverter::timestamp_to_datetime(utc_timestamp,
cur_tz_info,
dt_value))) {
LOG_WARN("failed to convert timestamp to datetime", K(ret));
} else {
ObTimeConverter::trunc_datetime(expr.datum_meta_.scale_, dt_value);
expr_datum.set_datetime(dt_value);
}
}
}
return ret;
}
int ObExprSysdate::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(raw_expr);
UNUSED(op_cg_ctx);
rt_expr.eval_func_ = ObExprSysdate::eval_sysdate;
return OB_SUCCESS;
}
ObExprCurDate::ObExprCurDate(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_CUR_DATE, N_CUR_DATE, 0, NOT_ROW_DIMENSION,
INTERNAL_IN_MYSQL_MODE, INTERNAL_IN_ORACLE_MODE)
{
}
ObExprCurDate::~ObExprCurDate()
{
}
int ObExprCurDate::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
if (lib::is_mysql_mode()) {
type.set_date();
} else {
type.set_datetime();
}
if (type.get_scale() < MIN_SCALE_FOR_TEMPORAL) {
type.set_scale(MIN_SCALE_FOR_TEMPORAL);
}
return OB_SUCCESS;
}
int ObExprCurDate::eval_cur_date(const ObExpr &expr, ObEvalCtx &ctx,
ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
UNUSED(expr);
if (OB_ISNULL(ctx.exec_ctx_.get_physical_plan_ctx())
|| OB_ISNULL(ctx.exec_ctx_.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("phy_plan_ctx_ or my_session_ is null",
"phy_plan_ctx", ctx.exec_ctx_.get_physical_plan_ctx(), K(ret));
} else if (OB_UNLIKELY(!ctx.exec_ctx_.get_physical_plan_ctx()->has_cur_time())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("physical plan context don't have current time value");
} else {
int64_t ts_value = 0;
if (lib::is_oracle_mode()) {
ts_value = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time_tardy_value();
//use mysql datetime type as oracle date type
int64_t dt_value = 0;
if (OB_FAIL(ObTimeConverter::timestamp_to_datetime(ts_value,
get_timezone_info(ctx.exec_ctx_.get_my_session()),
dt_value))) {
LOG_WARN("failed to convert timestamp to datetime", K(ret));
} else {
ObTimeConverter::trunc_datetime(expr.datum_meta_.scale_, dt_value);
expr_datum.set_datetime(dt_value);
}
} else {
ts_value = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time().get_timestamp();
int32_t d_value = 0;
if (OB_FAIL(ObTimeConverter::datetime_to_date(ts_value,
get_timezone_info(ctx.exec_ctx_.get_my_session()),
d_value))) {
LOG_WARN("failed to convert datetime to date", K(ret));
} else {
expr_datum.set_date(d_value);
}
}
}
return ret;
}
int ObExprCurDate::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(raw_expr);
UNUSED(op_cg_ctx);
rt_expr.eval_func_ = ObExprCurDate::eval_cur_date;
return OB_SUCCESS;
}
ObExprCurTime::ObExprCurTime(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_CUR_TIME, N_CUR_TIME, 0, NOT_ROW_DIMENSION)
{
}
ObExprCurTime::~ObExprCurTime()
{
}
int ObExprCurTime::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
type.set_time();
if (type.get_scale() < MIN_SCALE_FOR_TEMPORAL) {
type.set_scale(MIN_SCALE_FOR_TEMPORAL);
}
return OB_SUCCESS;
}
int ObExprCurTime::eval_cur_time(const ObExpr &expr, ObEvalCtx &ctx,
ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
UNUSED(expr);
if (OB_ISNULL(ctx.exec_ctx_.get_physical_plan_ctx())
|| OB_ISNULL(ctx.exec_ctx_.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("phy_plan_ctx_ or my_session_ is null",
"phy_plan_ctx", ctx.exec_ctx_.get_physical_plan_ctx(), K(ret));
} else if (OB_UNLIKELY(!ctx.exec_ctx_.get_physical_plan_ctx()->has_cur_time())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("physical plan context don't have current time value");
} else {
int64_t ts_value = ctx.exec_ctx_.get_physical_plan_ctx()->get_cur_time().get_timestamp();
int64_t t_value = 0;
if (OB_FAIL(ObTimeConverter::datetime_to_time(ts_value,
get_timezone_info(ctx.exec_ctx_.get_my_session()),
t_value))) {
LOG_WARN("failed to convert datetime to time", K(ret));
} else {
ObTimeConverter::trunc_datetime(expr.datum_meta_.scale_, t_value);
expr_datum.set_time(t_value);
}
}
return ret;
}
int ObExprCurTime::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(raw_expr);
UNUSED(op_cg_ctx);
rt_expr.eval_func_ = ObExprCurTime::eval_cur_time;
return OB_SUCCESS;
}
} //namespace sql
} //namespace oceanbase
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