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Bug#56172: Server crashes in ha_partition::reset on

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REBUILD PARTITION under LOCK TABLE

Collapsed patch including updates from the reviews.

In case of failure in ALTER ... PARTITION under LOCK TABLE
the server could crash, due to it had modified the locked
table object, which was not reverted in case of failure,
resulting in a bad table definition used after the failed
command.

Solved by instead of altering the locked table object and
its partition_info struct, creating an internal temporary
intermediate table object used for altering,
just like the non partitioned mysql_alter_table.
So if an error occur before the alter operation is complete,
the original table is not modified at all.
But if the alter operation have succeeded so far that it
must be completed as whole,
the table is properly closed and reopened.
(The completion on failure is done by the ddl_log.)
This commit is contained in:
Mattias Jonsson
2010-10-01 13:22:11 +02:00
parent ba7dec4a2d
commit 2a67a3a7f5
8 changed files with 4164 additions and 218 deletions
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17
sql/sql_table.cc
View File

@@ -1725,8 +1725,6 @@ bool mysql_write_frm(ALTER_PARTITION_PARAM_TYPE *lpt, uint flags)
CHF_DELETE_FLAG, NULL) ||
deactivate_ddl_log_entry(part_info->frm_log_entry->entry_pos) ||
(sync_ddl_log(), FALSE) ||
#endif
#ifdef WITH_PARTITION_STORAGE_ENGINE
mysql_file_rename(key_file_frm,
shadow_frm_name, frm_name, MYF(MY_WME)) ||
lpt->table->file->ha_create_handler_files(path, shadow_path,
@@ -5599,7 +5597,7 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
handlerton *old_db_type, *new_db_type, *save_old_db_type;
enum_alter_table_change_level need_copy_table= ALTER_TABLE_METADATA_ONLY;
#ifdef WITH_PARTITION_STORAGE_ENGINE
uint fast_alter_partition= 0;
TABLE *table_for_fast_alter_partition= NULL;
bool partition_changed= FALSE;
#endif
bool need_lock_for_indexes= TRUE;
@@ -5968,7 +5966,9 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
#ifdef WITH_PARTITION_STORAGE_ENGINE
if (prep_alter_part_table(thd, table, alter_info, create_info, old_db_type,
&partition_changed, &fast_alter_partition))
&partition_changed,
db, table_name, path,
&table_for_fast_alter_partition))
goto err;
#endif
/*
@@ -6201,12 +6201,12 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
create_info->frm_only= 1;
#ifdef WITH_PARTITION_STORAGE_ENGINE
if (fast_alter_partition)
if (table_for_fast_alter_partition)
{
DBUG_RETURN(fast_alter_partition_table(thd, table, alter_info,
create_info, table_list,
db, table_name,
fast_alter_partition));
table_for_fast_alter_partition));
}
#endif
@@ -6686,6 +6686,11 @@ err_new_table_cleanup:
create_info->frm_only ? FN_IS_TMP | FRM_ONLY : FN_IS_TMP);
err:
#ifdef WITH_PARTITION_STORAGE_ENGINE
/* If prep_alter_part_table created an intermediate table, destroy it. */
if (table_for_fast_alter_partition)
close_temporary(table_for_fast_alter_partition, 1, 0);
#endif /* WITH_PARTITION_STORAGE_ENGINE */
/*
No default value was provided for a DATE/DATETIME field, the
current sql_mode doesn't allow the '0000-00-00' value and