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After merge fix.

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svoj@may.pils.ru
2006-06-14 16:45:29 +05:00
parent 64bcd2cc11
commit 5d4b5deae1
1 changed files with 9 additions and 0 deletions
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sql/sql_table.cc
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@@ -4709,6 +4709,14 @@ static uint compare_tables(TABLE *table, List<create_field> *create_list,
At the moment we can't handle altering temporary tables without a copy.
We also test if OPTIMIZE TABLE was given and was mapped to alter table.
In that case we always do full copy.
There was a bug prior to mysql-4.0.25. Number of null fields was
calculated incorrectly. As a result frm and data files gets out of
sync after fast alter table. There is no way to determine by which
mysql version (in 4.0 and 4.1 branches) table was created, thus we
disable fast alter table for all tables created by mysql versions
prior to 5.0 branch.
See BUG#6236.
*/
if (table->s->fields != create_list->elements ||
table->s->db_type != create_info->db_type ||
@@ -4718,6 +4726,7 @@ static uint compare_tables(TABLE *table, List<create_field> *create_list,
create_info->used_fields & HA_CREATE_USED_DEFAULT_CHARSET ||
(alter_info->flags & (ALTER_RECREATE | ALTER_FOREIGN_KEY)) ||
order_num ||
!table->s->mysql_version ||
(table->s->frm_version < FRM_VER_TRUE_VARCHAR && varchar))
DBUG_RETURN(ALTER_TABLE_DATA_CHANGED);