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MDEV-19751 Wrong partitioning by KEY() after primary key dropped

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Default (empty) field list in partitioning by KEY() clause is assigned
from primary key. If primary key is changed the partitioning field
list is changed as well, so repartitioning required. Not applicable to
any non-primary keys as default field list may be taken only from
primary key.
This commit is contained in:
Aleksey Midenkov
2020-05-26 11:43:43 +03:00
parent 5530a93f47
commit fbcfbb0e1c
3 changed files with 104 additions and 0 deletions
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22
sql/sql_partition.cc
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@ -5473,6 +5473,28 @@ the generated partition syntax in a correct manner.
*partition_changed= TRUE;
}
}
/*
Prohibit inplace when partitioned by primary key and the primary key is dropped.
*/
if (!*partition_changed &&
tab_part_info->part_field_array &&
!tab_part_info->part_field_list.elements &&
table->s->primary_key != MAX_KEY)
{
KEY *primary_key= table->key_info + table->s->primary_key;
List_iterator_fast<Alter_drop> drop_it(alter_info->drop_list);
const char *primary_name= primary_key->name;
const Alter_drop *drop;
drop_it.rewind();
while ((drop= drop_it++))
{
if (drop->type == Alter_drop::KEY &&
0 == my_strcasecmp(system_charset_info, primary_name, drop->name))
break;
}
if (drop)
*partition_changed= TRUE;
}
}
if (thd->work_part_info)
{