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MDEV-17460 Move the code from Item_extract::val_int() to a new class Extract_source

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This commit is contained in:
Alexander Barkov
2018-10-15 21:30:27 +04:00
parent 1c5fd80a04
commit f7179c4432
5 changed files with 176 additions and 114 deletions
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118
sql/sql_type.h
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@ -478,6 +478,10 @@ protected:
second <= TIME_MAX_SECOND &&
second_part <= TIME_MAX_SECOND_PART;
}
bool has_zero_YYYYMM() const
{
return year == 0 && month == 0;
}
bool has_zero_YYYYMMDD() const
{
return year == 0 && month == 0 && day == 0;
@ -556,6 +560,120 @@ public:
};
/*
This class resembles the SQL standard <extract source>,
used in extract expressions, e.g: EXTRACT(DAY FROM dt)
<extract expression> ::=
EXTRACT <left paren> <extract field> FROM <extract source> <right paren>
<extract source> ::= <datetime value expression> | <interval value expression>
*/
class Extract_source: public Temporal_hybrid
{
/*
Convert a TIME value to DAY-TIME interval, e.g. for extraction:
EXTRACT(DAY FROM x), EXTRACT(HOUR FROM x), etc.
Moves full days from ltime->hour to ltime->day.
*/
void time_to_daytime_interval()
{
DBUG_ASSERT(time_type == MYSQL_TIMESTAMP_TIME);
DBUG_ASSERT(has_zero_YYYYMMDD());
MYSQL_TIME::day= MYSQL_TIME::hour / 24;
MYSQL_TIME::hour%= 24;
}
bool is_valid_extract_source_slow() const
{
return is_valid_temporal() && MYSQL_TIME::hour < 24 &&
(has_zero_YYYYMM() || time_type != MYSQL_TIMESTAMP_TIME);
}
bool is_valid_value_slow() const
{
return time_type == MYSQL_TIMESTAMP_NONE || is_valid_extract_source_slow();
}
public:
Extract_source(THD *thd, Item *item, date_mode_t mode)
:Temporal_hybrid(thd, item, mode)
{
if (MYSQL_TIME::time_type == MYSQL_TIMESTAMP_TIME)
time_to_daytime_interval();
DBUG_ASSERT(is_valid_value_slow());
}
inline const MYSQL_TIME *get_mysql_time() const
{
DBUG_ASSERT(is_valid_extract_source_slow());
return this;
}
bool is_valid_extract_source() const { return is_valid_temporal(); }
int sign() const { return get_mysql_time()->neg ? -1 : 1; }
uint year() const { return get_mysql_time()->year; }
uint month() const { return get_mysql_time()->month; }
int day() const { return (int) get_mysql_time()->day * sign(); }
int hour() const { return (int) get_mysql_time()->hour * sign(); }
int minute() const { return (int) get_mysql_time()->minute * sign(); }
int second() const { return (int) get_mysql_time()->second * sign(); }
int microsecond() const { return (int) get_mysql_time()->second_part * sign(); }
uint year_month() const { return year() * 100 + month(); }
uint quarter() const { return (month() + 2)/3; }
uint week(THD *thd) const;
longlong second_microsecond() const
{
return (second() * 1000000LL + microsecond());
}
// DAY TO XXX
longlong day_hour() const
{
return (longlong) day() * 100LL + hour();
}
longlong day_minute() const
{
return day_hour() * 100LL + minute();
}
longlong day_second() const
{
return day_minute() * 100LL + second();
}
longlong day_microsecond() const
{
return day_second() * 1000000LL + microsecond();
}
// HOUR TO XXX
int hour_minute() const
{
return hour() * 100 + minute();
}
int hour_second() const
{
return hour_minute() * 100 + second();
}
longlong hour_microsecond() const
{
return hour_second() * 1000000LL + microsecond();
}
// MINUTE TO XXX
int minute_second() const
{
return minute() * 100 + second();
}
longlong minute_microsecond() const
{
return minute_second() * 1000000LL + microsecond();
}
};
/*
This class is used for the "time_interval" argument of these SQL functions:
TIMESTAMP(tm,time_interval)
ADDTIME(tm,time_interval)
Features:
- DATE and DATETIME formats are treated as errors
- Preserves hours for TIME format as is, without limiting to TIME_MAX_HOUR
*/
class Interval_DDhhmmssff: public Temporal
{
static const LEX_CSTRING m_type_name;