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oceanbase/src/sql/engine/expr/ob_expr_extract.cpp
2149 8dd2cf466a Fix failed mysqltests
2023-05-30 01:11:12 +00:00

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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_extract.h"
#include "lib/allocator/ob_allocator.h"
#include "lib/time/ob_time_utility.h"
#include "lib/timezone/ob_time_convert.h"
#include "lib/ob_name_def.h"
#include "lib/ob_date_unit_type.h"
#include "sql/session/ob_sql_session_info.h"
#include "sql/engine/ob_exec_context.h"
#include "sql/engine/expr/ob_datum_cast.h"
#define STR_LEN 20
namespace oceanbase
{
using namespace common;
namespace sql
{
ObExprExtract::ObExprExtract(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_EXTRACT, N_EXTRACT, 2, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
{
}
ObExprExtract::~ObExprExtract()
{
}
int ObExprExtract::calc_result_type2(ObExprResType &type,
ObExprResType &date_unit,
ObExprResType &date,
ObExprTypeCtx &type_ctx) const
{
int ret = OB_SUCCESS;
if (lib::is_oracle_mode()) {
if (OB_FAIL(set_result_type_oracle(type_ctx, date_unit, type))) {
LOG_WARN("set_result_type_oracle failed", K(ret), K(type));
}
} else {
if (ob_is_enumset_tc(date.get_type())) {
date.set_calc_type(ObVarcharType);
}
type.set_int();
type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObIntType].precision_);
}
return ret;
}
int ObExprExtract::set_result_type_oracle(ObExprTypeCtx &type_ctx,
const ObExprResType &date_unit,
ObExprResType &res_type) const
{
int ret = OB_SUCCESS;
bool is_varchar = false;
const ObObj &date_unit_obj = date_unit.get_param();
if (false == date_unit_obj.is_null_oracle()) {
ObDateUnitType date_unit_val = static_cast<ObDateUnitType>(date_unit_obj.get_int());
if (DATE_UNIT_TIMEZONE_ABBR == date_unit_val || DATE_UNIT_TIMEZONE_REGION == date_unit_val) {
is_varchar = true;
}
}
if (is_varchar) {
ObCollationType collation_connection = type_ctx.get_coll_type();
if (CS_TYPE_INVALID == collation_connection) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid connection cs_type", K(ret), K(collation_connection));
} else {
res_type.set_varchar();
res_type.set_collation_type(collation_connection);
res_type.set_collation_level(CS_LEVEL_IMPLICIT);
}
} else {
res_type.set_number();
res_type.set_precision(PRECISION_UNKNOWN_YET);
res_type.set_scale(NUMBER_SCALE_UNKNOWN_YET);
}
return ret;
}
template <typename T, bool with_date>
inline int obj_to_time(const T &date, ObObjType type,
const ObTimeZoneInfo *tz_info, ObTime &ob_time,
const int64_t cur_ts_value,
const ObDateSqlMode date_sql_mode,
bool has_lob_header);
template <>
inline int obj_to_time<ObObj, true>(const ObObj &date, ObObjType type,
const ObTimeZoneInfo *tz_info, ObTime& ob_time,
const int64_t cur_ts_value,
const ObDateSqlMode date_sql_mode,
bool has_lob_header)
{
UNUSED(type);
UNUSED(has_lob_header);
return ob_obj_to_ob_time_with_date(date, tz_info, ob_time, cur_ts_value, false, date_sql_mode);
}
template <>
inline int obj_to_time<ObObj, false>(const ObObj &date, ObObjType type,
const ObTimeZoneInfo *tz_info, ObTime &ob_time,
const int64_t cur_ts_value,
const ObDateSqlMode date_sql_mode,
bool has_lob_header)
{
UNUSED(type);
UNUSED(cur_ts_value);
UNUSED(date_sql_mode);
UNUSED(has_lob_header);
return ob_obj_to_ob_time_without_date(date, tz_info, ob_time);
}
template <>
inline int obj_to_time<ObDatum, true>(const ObDatum &date, ObObjType type,
const ObTimeZoneInfo *tz_info, ObTime &ob_time,
const int64_t cur_ts_value,
const ObDateSqlMode date_sql_mode,
bool has_lob_header)
{
return ob_datum_to_ob_time_with_date(
date, type, tz_info, ob_time, cur_ts_value, false, date_sql_mode, has_lob_header);
}
template <>
inline int obj_to_time<ObDatum, false>(const ObDatum &date, ObObjType type,
const ObTimeZoneInfo *tz_info, ObTime &ob_time,
const int64_t cur_ts_value,
const ObDateSqlMode date_sql_mode,
bool has_lob_header)
{
UNUSED(cur_ts_value);
UNUSED(date_sql_mode);
return ob_datum_to_ob_time_without_date(date, type, tz_info, ob_time, has_lob_header);
}
template <typename T>
int ObExprExtract::calc(T &result,
const int64_t date_unit,
const T &date,
ObObjType date_type,
const ObCastMode cast_mode,
const ObTimeZoneInfo *tz_info,
const int64_t cur_ts_value,
const ObDateSqlMode date_sql_mode,
bool has_lob_header)
{
int ret = OB_SUCCESS;
class ObTime ob_time;
memset(&ob_time, 0, sizeof(ob_time));
if (date.is_null()) {
result.set_null();
} else {
int warning = OB_SUCCESS;
int &cast_ret = CM_IS_ERROR_ON_FAIL(cast_mode) ? ret : warning;
ObDateUnitType unit_val = static_cast<ObDateUnitType>(date_unit);
switch (unit_val){
case DATE_UNIT_DAY:
case DATE_UNIT_WEEK:
case DATE_UNIT_MONTH:
case DATE_UNIT_QUARTER:
case DATE_UNIT_YEAR:
case DATE_UNIT_DAY_MICROSECOND:
case DATE_UNIT_DAY_SECOND:
case DATE_UNIT_DAY_MINUTE:
case DATE_UNIT_DAY_HOUR:
case DATE_UNIT_YEAR_MONTH:
cast_ret = obj_to_time<T, true>(
date, date_type, tz_info, ob_time, cur_ts_value, date_sql_mode, has_lob_header);
break;
default:
cast_ret = obj_to_time<T, false>(date, date_type, tz_info, ob_time, cur_ts_value, 0, has_lob_header);
}
if (OB_SUCC(ret)) {
if (OB_LIKELY(OB_SUCCESS == warning)){
ObDateUnitType unit_type = static_cast<ObDateUnitType>(date_unit);
int64_t value = ObTimeConverter::ob_time_to_int_extract(ob_time, unit_type);
result.set_int(value);
} else {
result.set_null();
}
}
}
return ret;
}
template <typename T>
void ob_set_string(T &result, ObString str);
template <>
void ob_set_string<ObDatum>(ObDatum &result, ObString str)
{
result.set_string(str);
}
template <>
void ob_set_string<ObObj>(ObObj &result, ObString str)
{
result.set_varchar(str);
}
template <typename T>
ObOTimestampData get_otimestamp_value(const T &param, ObObjType type);
template <>
ObOTimestampData get_otimestamp_value<ObObj>(const ObObj &param, ObObjType type)
{
UNUSED(type);
return param.get_otimestamp_value();
}
template <>
ObOTimestampData get_otimestamp_value<ObDatum>(const ObDatum &param, ObObjType type)
{
return ObTimestampTZType == type ? param.get_otimestamp_tz()
: param.get_otimestamp_tiny();
}
template <typename T>
int ObExprExtract::calc_oracle(T &result,
const int64_t date_unit,
const T &date,
ObObjType type,
const ObSQLSessionInfo *session,
ObIAllocator *calc_buf)
{
int ret = OB_SUCCESS;
if (date.is_null()) {
result.set_null();
} else {
ObDateUnitType unit_val = static_cast<ObDateUnitType>(date_unit);
bool extract_timezone_field =
(DATE_UNIT_TIMEZONE_ABBR == unit_val)
|| (DATE_UNIT_TIMEZONE_HOUR == unit_val)
|| (DATE_UNIT_TIMEZONE_MINUTE == unit_val)
|| (DATE_UNIT_TIMEZONE_REGION == unit_val);
bool extract_time_field =
(DATE_UNIT_HOUR == unit_val)
|| (DATE_UNIT_MINUTE == unit_val)
|| (DATE_UNIT_SECOND == unit_val);
bool extract_day_field = (DATE_UNIT_DAY == unit_val);
bool extract_year_month_field =
(DATE_UNIT_YEAR == unit_val)
|| (DATE_UNIT_MONTH == unit_val);
bool valid_expr = false;
//1. check the extraction field is valid
switch (type) {
//see oracle doc EXTRACT (datetime) : https://docs.oracle.com/cd/B28359_01/server.111/b28286/functions052.htm#SQLRF00639
case ObDateTimeType:
valid_expr = !extract_timezone_field && !extract_time_field;
break;
case ObTimestampNanoType:
valid_expr = !extract_timezone_field;
break;
case ObTimestampLTZType:
case ObTimestampTZType:
valid_expr = true;
break;
case ObIntervalYMType:
valid_expr = !extract_timezone_field && !extract_day_field && !extract_time_field;
break;
case ObIntervalDSType:
valid_expr = !extract_timezone_field && !extract_year_month_field;
break;
default:
valid_expr = false;
}
if (OB_UNLIKELY(!valid_expr)) {
ret = OB_ERR_EXTRACT_FIELD_INVALID; //ORA-30076: invalid extract field for extract source
LOG_WARN("invalid extract field for extract source", K(ret),
"requested field", ob_date_unit_type_str(unit_val),
"expr type", type);
}
ObTime ob_time;
ObIntervalParts interval_part;
//2. convert to time struct
if (OB_SUCC(ret)) {
switch (ob_obj_type_class(type)) {
case ObDateTimeTC:
if (OB_FAIL(ObTimeConverter::datetime_to_ob_time(date.get_datetime(),
NULL,
ob_time))) {
LOG_WARN("fail to convert date to ob time", K(ret), K(date));
}
break;
case ObOTimestampTC:
if (OB_FAIL(ObTimeConverter::otimestamp_to_ob_time(type,
get_otimestamp_value(date, type),
get_timezone_info(session),
ob_time,
ObTimestampLTZType != type))) {
LOG_WARN("fail to convert otimestamp to ob time", K(ret), K(date));
}
break;
case ObIntervalTC:
if (ObIntervalYMType == type) {
ObTimeConverter::interval_ym_to_display_part(date.get_interval_ym(), interval_part);
} else {
ObTimeConverter::interval_ds_to_display_part(date.get_interval_ds(), interval_part);
}
break;
default:
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected type class", K(ret), K(date));
}
}
//3. get result interger or string
int64_t result_value = INT64_MIN;
int64_t fsecond = INT64_MIN;
ObString result_str;
if (OB_SUCC(ret)) {
bool is_interval_tc = (ObIntervalTC == ob_obj_type_class(type));
switch (unit_val) {
case DATE_UNIT_YEAR:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::YEAR_PART) : ob_time.parts_[DT_YEAR];
break;
case DATE_UNIT_MONTH:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::MONTH_PART) : ob_time.parts_[DT_MON];
break;
case DATE_UNIT_DAY:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::DAY_PART) : ob_time.parts_[DT_MDAY];
break;
case DATE_UNIT_HOUR:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::HOUR_PART) : ob_time.parts_[DT_HOUR];
break;
case DATE_UNIT_MINUTE:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::MINUTE_PART) : ob_time.parts_[DT_MIN];
break;
case DATE_UNIT_SECOND:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::SECOND_PART) : ob_time.parts_[DT_SEC];
fsecond = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::FRECTIONAL_SECOND_PART) : ob_time.parts_[DT_USEC];
break;
case DATE_UNIT_TIMEZONE_HOUR:
result_value = ob_time.parts_[DT_OFFSET_MIN] / 60;
break;
case DATE_UNIT_TIMEZONE_MINUTE:
result_value = ob_time.parts_[DT_OFFSET_MIN] % 60;
break;
case DATE_UNIT_TIMEZONE_REGION:
result_str = ob_time.get_tz_name_str();
if (result_str.empty()) {
result_str = ObString("UNKNOWN");
}
break;
case DATE_UNIT_TIMEZONE_ABBR:
result_str = ob_time.get_tzd_abbr_str();
if (result_str.empty()) {
result_str = ObString("UNK");
}
break;
default:
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid field for extract", K(ret), K(unit_val));
}
}
if (OB_SUCC(ret)) {
if (result_value != INT64_MIN) {
//interger result
number::ObNumber res_number;
number::ObNumber res_with_fsecond_number;
number::ObNumber fs_value;
number::ObNumber power10;
number::ObNumber fs_number;
ObIAllocator *allocator = NULL;
if (OB_ISNULL(allocator = calc_buf)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("calc buf is null", K(ret));
} else if (OB_FAIL(res_number.from(result_value, *allocator))) {
LOG_WARN("fail to convert interger to ob number", K(ret));
} else if (fsecond != INT64_MIN) {
if (OB_FAIL(fs_value.from(fsecond, *allocator))) {
LOG_WARN("fail to convert to ob number", K(ret));
} else if (OB_FAIL(power10.from(static_cast<int64_t>(ObIntervalDSValue::MAX_FS_VALUE), *allocator))) {
LOG_WARN("failed to round number", K(ret));
} else if (OB_FAIL(fs_value.div(power10, fs_number, *allocator))) {
LOG_WARN("fail to div fs", K(ret));
} else if (OB_FAIL(res_number.add(fs_number, res_with_fsecond_number, *allocator))) {
LOG_WARN("fail to add fsecond", K(ret));
} else {
result.set_number(res_with_fsecond_number);
}
} else {
result.set_number(res_number);
}
} else {
ob_set_string(result, result_str);
}
}
}
return ret;
}
int ObExprExtract::cg_expr(ObExprCGCtx &op_cg_ctx,
const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(op_cg_ctx);
UNUSED(raw_expr);
int ret = OB_SUCCESS;
if (rt_expr.arg_cnt_ != 2) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("extract expr should have 2 params", K(ret), K(rt_expr.arg_cnt_));
} else if (OB_ISNULL(rt_expr.args_) || OB_ISNULL(rt_expr.args_[0])
|| OB_ISNULL(rt_expr.args_[1])) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("children of extract expr is null", K(ret), K(rt_expr.args_));
} else {
if (is_oracle_mode()) {
rt_expr.eval_func_ = ObExprExtract::calc_extract_oracle;
} else {
rt_expr.eval_func_ = ObExprExtract::calc_extract_mysql;
}
// For static engine batch
// Actually, the first param is always constant, can't be batch result
if (!rt_expr.args_[0]->is_batch_result() && rt_expr.args_[1]->is_batch_result()) {
if (is_oracle_mode()) {
rt_expr.eval_batch_func_ = ObExprExtract::calc_extract_oracle_batch;
} else {
rt_expr.eval_batch_func_ = ObExprExtract::calc_extract_mysql_batch;
}
}
}
return ret;
}
int ObExprExtract::calc_extract_oracle(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
ObDatum *param_datum1 = NULL;
ObDatum *param_datum2 = NULL;
const ObSQLSessionInfo *session = NULL;
if (OB_ISNULL(session = ctx.exec_ctx_.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is null", K(ret));
} else if (OB_FAIL(expr.args_[0]->eval(ctx, param_datum1))) {
LOG_WARN("eval param1 value failed");
} else if (OB_FAIL(expr.args_[1]->eval(ctx, param_datum2))) {
LOG_WARN("eval param2 value failed");
} else {
ObDatum *result = static_cast<ObDatum *>(&expr_datum);
ObEvalCtx::TempAllocGuard alloc_guard(ctx);
ret = calc_oracle(*result, param_datum1->get_int(), *param_datum2,
expr.args_[1]->datum_meta_.type_, session, &alloc_guard.get_allocator());
}
return ret;
}
int ObExprExtract::calc_extract_mysql(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
ObDatum *param_datum1 = NULL;
ObDatum *param_datum2 = NULL;
const ObSQLSessionInfo *session = NULL;
if (OB_ISNULL(session = ctx.exec_ctx_.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is null", K(ret));
} else if (OB_FAIL(expr.args_[0]->eval(ctx, param_datum1))) {
LOG_WARN("eval param1 value failed");
} else if (OB_FAIL(expr.args_[1]->eval(ctx, param_datum2))) {
LOG_WARN("eval param2 value failed");
} else {
ObDatum *result = static_cast<ObDatum *>(&expr_datum);
uint64_t cast_mode = 0;
ObSQLUtils::get_default_cast_mode(session->get_stmt_type(), session, cast_mode);
ObDateSqlMode date_sql_mode;
date_sql_mode.init(session->get_sql_mode());
ret = ObExprExtract::calc(*result, param_datum1->get_int(), *param_datum2,
expr.args_[1]->datum_meta_.type_,
cast_mode, get_timezone_info(session),
get_cur_time(ctx.exec_ctx_.get_physical_plan_ctx()),
date_sql_mode, expr.args_[1]->obj_meta_.has_lob_header());
}
return ret;
}
int ObExprExtract::calc_extract_mysql_batch(
const ObExpr &expr, ObEvalCtx &ctx, const ObBitVector &skip, const int64_t batch_size)
{
LOG_DEBUG("eval mysql extract in batch mode", K(batch_size));
int ret = OB_SUCCESS;
ObDatum *results = expr.locate_batch_datums(ctx);
if (OB_ISNULL(results)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expr results frame is not init", K(ret));
} else {
ObBitVector &eval_flags = expr.get_evaluated_flags(ctx);
ObDatum *date_unit_datum = NULL;
const ObSQLSessionInfo *session = NULL;
if (OB_ISNULL(session = ctx.exec_ctx_.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is null", K(ret));
} else if (OB_FAIL(expr.args_[0]->eval(ctx, date_unit_datum))) {
LOG_WARN("eval date_unit_datum failed", K(ret));
} else if (OB_FAIL(expr.args_[1]->eval_batch(ctx, skip, batch_size))) {
LOG_WARN("failed to eval batch result args0", K(ret));
} else {
uint64_t cast_mode = 0;
ObSQLUtils::get_default_cast_mode(session->get_stmt_type(), session, cast_mode);
ObDateUnitType unit_val = static_cast<ObDateUnitType>(date_unit_datum->get_int());
bool is_with_date = false;
int warning = OB_SUCCESS;
int &cast_ret = CM_IS_ERROR_ON_FAIL(cast_mode) ? ret : warning;
ObDatum *datum_array = expr.args_[1]->locate_batch_datums(ctx);
const ObTimeZoneInfo *tz_info = get_timezone_info(session);
const int64_t cur_ts_value = get_cur_time(ctx.exec_ctx_.get_physical_plan_ctx());
class ObTime ob_time;
switch (unit_val) {
case DATE_UNIT_DAY:
case DATE_UNIT_WEEK:
case DATE_UNIT_MONTH:
case DATE_UNIT_QUARTER:
case DATE_UNIT_YEAR:
case DATE_UNIT_DAY_MICROSECOND:
case DATE_UNIT_DAY_SECOND:
case DATE_UNIT_DAY_MINUTE:
case DATE_UNIT_DAY_HOUR:
case DATE_UNIT_YEAR_MONTH:
is_with_date = true;
break;
default:
is_with_date = false;
}
for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
if (skip.at(j) || eval_flags.at(j)) {
continue;
} else if (datum_array[j].is_null()) {
results[j].set_null();
eval_flags.set(j);
} else {
ObDateSqlMode date_sql_mode;
date_sql_mode.init(session->get_sql_mode());
memset(&ob_time, 0, sizeof(ob_time));
if (is_with_date) {
cast_ret = obj_to_time<ObDatum, true>(
datum_array[j], expr.args_[1]->datum_meta_.type_, tz_info, ob_time, cur_ts_value,
date_sql_mode, expr.args_[1]->obj_meta_.has_lob_header());
} else {
cast_ret = obj_to_time<ObDatum, false>(
datum_array[j], expr.args_[1]->datum_meta_.type_, tz_info, ob_time, cur_ts_value,
date_sql_mode, expr.args_[1]->obj_meta_.has_lob_header());
}
if (OB_SUCC(ret)) {
if (OB_LIKELY(OB_SUCCESS == warning)){
int64_t value = ObTimeConverter::ob_time_to_int_extract(ob_time, unit_val);
results[j].set_int(value);
} else {
results[j].set_null();
}
eval_flags.set(j);
}
}
}
}
}
return ret;
}
int ObExprExtract::calc_extract_oracle_batch(
const ObExpr &expr, ObEvalCtx &ctx, const ObBitVector &skip, const int64_t batch_size)
{
LOG_DEBUG("eval oracle extract in batch mode", K(batch_size));
int ret = OB_SUCCESS;
ObDatum *results = expr.locate_batch_datums(ctx);
if (OB_ISNULL(results)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expr results frame is not init", K(ret));
} else {
ObBitVector &eval_flags = expr.get_evaluated_flags(ctx);
ObDatum *date_unit_datum = NULL;
const ObSQLSessionInfo *session = NULL;
if (OB_ISNULL(session = ctx.exec_ctx_.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is null", K(ret));
} else if (OB_FAIL(expr.args_[0]->eval(ctx, date_unit_datum))) {
LOG_WARN("eval date_unit_datum failed", K(ret));
} else if (OB_FAIL(expr.args_[1]->eval_batch(ctx, skip, batch_size))) {
LOG_WARN("failed to eval batch result args0", K(ret));
} else {
ObDatum *datum_array = expr.args_[1]->locate_batch_datums(ctx);
common::ObObjType type = expr.args_[1]->datum_meta_.type_;
ObDateUnitType unit_val = static_cast<ObDateUnitType>(date_unit_datum->get_int());
// 1. check the extraction field is valid
bool extract_timezone_field =
(DATE_UNIT_TIMEZONE_ABBR == unit_val)
|| (DATE_UNIT_TIMEZONE_HOUR == unit_val)
|| (DATE_UNIT_TIMEZONE_MINUTE == unit_val)
|| (DATE_UNIT_TIMEZONE_REGION == unit_val);
bool extract_time_field =
(DATE_UNIT_HOUR == unit_val)
|| (DATE_UNIT_MINUTE == unit_val)
|| (DATE_UNIT_SECOND == unit_val);
bool extract_day_field = (DATE_UNIT_DAY == unit_val);
bool extract_year_month_field =
(DATE_UNIT_YEAR == unit_val)
|| (DATE_UNIT_MONTH == unit_val);
bool valid_expr = false;
switch (type) {
// see oracle doc EXTRACT (datetime) :
// https://docs.oracle.com/cd/B28359_01/server.111/b28286/functions052.htm#SQLRF00639
case ObDateTimeType:
valid_expr = !extract_timezone_field && !extract_time_field;
break;
case ObTimestampNanoType:
valid_expr = !extract_timezone_field;
break;
case ObTimestampLTZType:
case ObTimestampTZType:
valid_expr = true;
break;
case ObIntervalYMType:
valid_expr = !extract_timezone_field && !extract_day_field && !extract_time_field;
break;
case ObIntervalDSType:
valid_expr = !extract_timezone_field && !extract_year_month_field;
break;
default:
valid_expr = false;
}
if (OB_UNLIKELY(!valid_expr)) {
ret = OB_ERR_EXTRACT_FIELD_INVALID; // ORA-30076: invalid extract field for extract source
LOG_WARN("invalid extract field for extract source", K(ret),
"requested field", ob_date_unit_type_str(unit_val),
"expr type", type);
}
for (int64_t j = 0; OB_SUCC(ret) && j < batch_size; ++j) {
if (skip.at(j) || eval_flags.at(j)) {
continue;
} else if (datum_array[j].is_null()) {
results[j].set_null();
eval_flags.set(j);
} else {
// 2. convert to time struct
ObTime ob_time;
ObIntervalParts interval_part;
if (OB_SUCC(ret)) {
switch (ob_obj_type_class(type)) {
case ObDateTimeTC:
if (OB_FAIL(ObTimeConverter::datetime_to_ob_time(datum_array[j].get_datetime(),
NULL,
ob_time))) {
LOG_WARN("fail to convert date to ob time", K(ret), K(datum_array[j]));
}
break;
case ObOTimestampTC:
if (OB_FAIL(ObTimeConverter::otimestamp_to_ob_time(type,
get_otimestamp_value(datum_array[j], expr.args_[1]->datum_meta_.type_),
get_timezone_info(session),
ob_time,
ObTimestampLTZType != expr.args_[1]->datum_meta_.type_))) {
LOG_WARN("fail to convert otimestamp to ob time", K(ret), K(datum_array[j]));
}
break;
case ObIntervalTC:
if (ObIntervalYMType == type) {
ObTimeConverter::interval_ym_to_display_part(datum_array[j].get_interval_ym(), interval_part);
} else {
ObTimeConverter::interval_ds_to_display_part(datum_array[j].get_interval_ds(), interval_part);
}
break;
default:
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected type class", K(ret), K(datum_array[j]));
}
}
// 3. get result interger or string
int64_t result_value = INT64_MIN;
int64_t fsecond = INT64_MIN;
ObString result_str;
if (OB_SUCC(ret)) {
bool is_interval_tc = (ObIntervalTC == ob_obj_type_class(expr.args_[1]->datum_meta_.type_));
switch (date_unit_datum->get_int()) {
case DATE_UNIT_YEAR:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::YEAR_PART) : ob_time.parts_[DT_YEAR];
break;
case DATE_UNIT_MONTH:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::MONTH_PART) : ob_time.parts_[DT_MON];
break;
case DATE_UNIT_DAY:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::DAY_PART) : ob_time.parts_[DT_MDAY];
break;
case DATE_UNIT_HOUR:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::HOUR_PART) : ob_time.parts_[DT_HOUR];
break;
case DATE_UNIT_MINUTE:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::MINUTE_PART) : ob_time.parts_[DT_MIN];
break;
case DATE_UNIT_SECOND:
result_value = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::SECOND_PART) : ob_time.parts_[DT_SEC];
fsecond = is_interval_tc ? interval_part.get_part_value(ObIntervalParts::FRECTIONAL_SECOND_PART) : ob_time.parts_[DT_USEC];
break;
case DATE_UNIT_TIMEZONE_HOUR:
result_value = ob_time.parts_[DT_OFFSET_MIN] / 60;
break;
case DATE_UNIT_TIMEZONE_MINUTE:
result_value = ob_time.parts_[DT_OFFSET_MIN] % 60;
break;
case DATE_UNIT_TIMEZONE_REGION:
result_str = ob_time.get_tz_name_str();
if (result_str.empty()) {
result_str = ObString("UNKNOWN");
}
break;
case DATE_UNIT_TIMEZONE_ABBR:
result_str = ob_time.get_tzd_abbr_str();
if (result_str.empty()) {
result_str = ObString("UNK");
}
break;
default:
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid field for extract", K(ret), K(unit_val));
}
}
if (OB_SUCC(ret)) {
if (result_value != INT64_MIN) {
// interger result
number::ObNumber res_number;
number::ObNumber res_with_fsecond_number;
number::ObNumber fs_value;
number::ObNumber power10;
number::ObNumber fs_number;
ObIAllocator *allocator = NULL;
ObEvalCtx::TempAllocGuard alloc_guard(ctx);
if (OB_ISNULL(allocator = &alloc_guard.get_allocator())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("calc buf is null", K(ret));
} else if (OB_FAIL(res_number.from(result_value, *allocator))) {
LOG_WARN("fail to convert interger to ob number", K(ret));
} else if (fsecond != INT64_MIN) {
if (OB_FAIL(fs_value.from(fsecond, *allocator))) {
LOG_WARN("fail to convert to ob number", K(ret));
} else if (OB_FAIL(power10.from(static_cast<int64_t>(ObIntervalDSValue::MAX_FS_VALUE), *allocator))) {
LOG_WARN("failed to round number", K(ret));
} else if (OB_FAIL(fs_value.div(power10, fs_number, *allocator))) {
LOG_WARN("fail to div fs", K(ret));
} else if (OB_FAIL(res_number.add(fs_number, res_with_fsecond_number, *allocator))) {
LOG_WARN("fail to add fsecond", K(ret));
} else {
results[j].set_number(res_with_fsecond_number);
}
} else {
results[j].set_number(res_number);
}
} else {
ob_set_string(results[j], result_str);
}
eval_flags.set(j);
}
}
}
}
}
return ret;
}
}
}
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