diff --git a/mysql-test/r/cache_temporal_4265.result b/mysql-test/r/cache_temporal_4265.result index 1b4b3c2c4aa..7f215de43fb 100644 --- a/mysql-test/r/cache_temporal_4265.result +++ b/mysql-test/r/cache_temporal_4265.result @@ -7,4 +7,17 @@ a 2002-03-04 Warnings: Note 1003 2000-01-01 +set debug_dbug=''; +drop table t1; +create table t1 (id int not null, ut timestamp(6) not null); +insert into t1 values(1, '2001-01-01 00:00:00.2'); +insert into t1 values(1, '2001-01-01 00:00:00.1'); +select * from t1; +id ut +1 2001-01-01 00:00:00.200000 +1 2001-01-01 00:00:00.100000 +select (select max(m2.ut) from t1 m2 where m1.id <> 0) from t1 m1; +(select max(m2.ut) from t1 m2 where m1.id <> 0) +2001-01-01 00:00:00.200000 +2001-01-01 00:00:00.200000 drop table t1; diff --git a/mysql-test/t/cache_temporal_4265.test b/mysql-test/t/cache_temporal_4265.test index 6135438f023..c62f3c3c506 100644 --- a/mysql-test/t/cache_temporal_4265.test +++ b/mysql-test/t/cache_temporal_4265.test @@ -7,5 +7,16 @@ create table t1 (a date); insert t1 values ('2000-01-02'), ('2001-02-03'), ('2002-03-04'); set debug_dbug='d,str_to_datetime_warn'; select * from t1 where a > date_add('2000-01-01', interval 5 day); +set debug_dbug=''; +drop table t1; + +# +# MDEV-9707 MAX(timestamp(6) column) in correlated sub-query returns non-existent row data in original table +# +create table t1 (id int not null, ut timestamp(6) not null); +insert into t1 values(1, '2001-01-01 00:00:00.2'); +insert into t1 values(1, '2001-01-01 00:00:00.1'); +select * from t1; +select (select max(m2.ut) from t1 m2 where m1.id <> 0) from t1 m1; drop table t1; diff --git a/sql/sql_select.cc b/sql/sql_select.cc index b1e22537b37..828dab7ef99 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -14544,6 +14544,14 @@ static Field *create_tmp_field_from_item(THD *thd, Item *item, TABLE *table, Field *new_field; LINT_INIT(new_field); + /* + To preserve type or DATE/TIME and GEOMETRY fields, + they need to be handled separately. + */ + if (item->cmp_type() == TIME_RESULT || + item->field_type() == MYSQL_TYPE_GEOMETRY) + new_field= item->tmp_table_field_from_field_type(table, 1); + else switch (item->result_type()) { case REAL_RESULT: new_field= new Field_double(item->max_length, maybe_null, @@ -14566,18 +14574,11 @@ static Field *create_tmp_field_from_item(THD *thd, Item *item, TABLE *table, case STRING_RESULT: DBUG_ASSERT(item->collation.collation); - /* - DATE/TIME and GEOMETRY fields have STRING_RESULT result type. - To preserve type they needed to be handled separately. - */ - if (item->cmp_type() == TIME_RESULT || - item->field_type() == MYSQL_TYPE_GEOMETRY) - new_field= item->tmp_table_field_from_field_type(table, 1); /* Make sure that the blob fits into a Field_varstring which has 2-byte lenght. */ - else if (item->max_length/item->collation.collation->mbmaxlen > 255 && + if (item->max_length/item->collation.collation->mbmaxlen > 255 && convert_blob_length <= Field_varstring::MAX_SIZE && convert_blob_length) new_field= new Field_varstring(convert_blob_length, maybe_null,