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84ed288f68
Side effect: the second debug Note in cache_temporal_4265.result disappeared.
Before this change:
- During JOIN::cache_const_exprs(),
Item::get_cache() for Item_date_add_interval() was called.
The data type for date_add('2001-01-01',interval 5 day) is VARCHAR,
because the first argument is VARCHAR (not temporal).
Item_get_cache() created Item_cache_str('2001-01-06').
- During evaluate_join_record(), get_datetime_value() was called,
which called Item::get_date() for Item_cache_str('2001-01-06').
This gave the second Note. Then, get_datetime_value() created
a new cache, now Item_cache_temporal for '2001-01-06', so not
further str_to_datetime() happened.
After this change:
- During tem_bool_rowready_func2::fix_length_and_dec(),
Arg_comparator::set_cmp_func_datetime() is called,
which immediately creates an instance of Item_cache_date for
the result of date_add('2001-01-01',interval 5 day).
So later no str_to_datetime happens any more,
neither during JOIN::cache_const_exprs(),
nor during evaluate_join_record().
24 lines
717 B
Plaintext
24 lines
717 B
Plaintext
create table t1 (a date);
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insert t1 values ('2000-01-02'), ('2001-02-03'), ('2002-03-04');
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set debug_dbug='d,str_to_datetime_warn';
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select * from t1 where a > date_add('2000-01-01', interval 5 day);
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a
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2001-02-03
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2002-03-04
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Warnings:
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Note 1003 2000-01-01
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set debug_dbug='';
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drop table t1;
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create table t1 (id int not null, ut timestamp(6) not null);
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insert into t1 values(1, '2001-01-01 00:00:00.2');
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insert into t1 values(1, '2001-01-01 00:00:00.1');
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select * from t1;
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id ut
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1 2001-01-01 00:00:00.200000
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1 2001-01-01 00:00:00.100000
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select (select max(m2.ut) from t1 m2 where m1.id <> 0) from t1 m1;
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(select max(m2.ut) from t1 m2 where m1.id <> 0)
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2001-01-01 00:00:00.200000
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2001-01-01 00:00:00.200000
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drop table t1;
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