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SQL: recreate PRIMARY KEY on DROP SYSTEM VERSIONING [#348]

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This commit is contained in:
Eugene Kosov
2017-11-24 21:26:43 +03:00
committed by Aleksey Midenkov
parent 0c571f8c4e
commit 62470fc787
2 changed files with 76 additions and 0 deletions
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59
sql/handler.cc
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@ -6927,6 +6927,29 @@ static bool add_field_to_drop_list(THD *thd, Alter_info *alter_info,
return !ad || alter_info->drop_list.push_back(ad, thd->mem_root);
}
static bool is_dropping_primary_key(Alter_info *alter_info)
{
List_iterator_fast<Alter_drop> it(alter_info->drop_list);
while (Alter_drop *ad= it++)
{
if (ad->type == Alter_drop::KEY &&
!my_strcasecmp(system_charset_info, ad->name, primary_key_name))
return true;
}
return false;
}
static bool is_adding_primary_key(Alter_info *alter_info)
{
List_iterator_fast<Key> it(alter_info->key_list);
while (Key *key= it++)
{
if (key->type == Key::PRIMARY)
return true;
}
return false;
}
bool Vers_parse_info::check_and_fix_alter(THD *thd, Alter_info *alter_info,
HA_CREATE_INFO *create_info,
TABLE *table)
@ -6964,6 +6987,42 @@ bool Vers_parse_info::check_and_fix_alter(THD *thd, Alter_info *alter_info,
add_field_to_drop_list(thd, alter_info, share->vers_end_field()))
return true;
if (share->primary_key != MAX_KEY && !is_adding_primary_key(alter_info) &&
!is_dropping_primary_key(alter_info))
{
alter_info->flags|= Alter_info::ALTER_DROP_INDEX;
Alter_drop *ad= new (thd->mem_root)
Alter_drop(Alter_drop::KEY, primary_key_name, false);
if (!ad || alter_info->drop_list.push_back(ad, thd->mem_root))
return true;
alter_info->flags|= Alter_info::ALTER_ADD_INDEX;
LEX_CSTRING key_name= {NULL, 0};
DDL_options_st options;
options.init();
Key *pk= new (thd->mem_root)
Key(Key::PRIMARY, &key_name, HA_KEY_ALG_UNDEF, false, options);
if (!pk)
return true;
st_key &key= table->key_info[share->primary_key];
for (st_key_part_info *it= key.key_part,
*end= it + key.user_defined_key_parts;
it != end; ++it)
{
if (it->field->vers_sys_field())
continue;
Key_part_spec *key_part_spec= new (thd->mem_root)
Key_part_spec(&it->field->field_name, it->length);
if (!key_part_spec ||
pk->columns.push_back(key_part_spec, thd->mem_root))
return true;
}
alter_info->key_list.push_back(pk);
}
return false;
}