database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-12-24 11:21:21 +03:00
Code Activity

Bug #40021: Renaming view fails, archived .frm for view is

Browse Source 
missing after downgrade

Obsolete arc/ directory and view .frm file backup support
has been removed by the patch for bug 17823. However, that
bugfix caused a problem with "live downgrades" of the
server: if we rename some view 4 times under 5.1.29/5.0.72
and then try to rename it under 5.1.28/5.0.70 on the same
database, the server fails with a error:

  query 'RENAME TABLE ... TO ...' failed: 6: Error on
  delete of '....frm-0001' (Errcode: 2)

Also .frm file of that view may be lost (renamed to .frm~).

The server failed because it tried to rename latest 3
backup .frm files renaming the view: the server used an
integer value of the "revision" field of .frm file to
extract those file names. After the fix for bug 17823 those
files were not created/maintained any more, however the
"revision" field was incremented as usual. So, the server
failed renaming non existent files.

This fix solves the problem by removing the support for
"revision" .frm file field:
1. New server silently ignores existent "revision" fields
   in old .frm files and never write it down;
2. Old server assumes, that missing "revision" field in new
   .frm files means default value of 0.
3. Accordingly to the fix for bug 17823 the new server
   drops arc/ directory on alter/rename view, so after
   "live downgrade" old server begins maintenance of the
   arc/ directory from scratch without conflicts with .frm
   files.
This commit is contained in:
Gleb Shchepa
2008-11-14 21:25:57 +04:00
parent ee3594b2d7
commit b82094a0f8
6 changed files with 17 additions and 126 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
sql/sql_trigger.cc
View File

@@ -479,7 +479,7 @@ bool Table_triggers_list::create_trigger(THD *thd, TABLE_LIST *tables,
trigname.trigger_table.length= tables->table_name_length;
if (sql_create_definition_file(&dir, &trigname_file, &trigname_file_type,
(gptr)&trigname, trigname_file_parameters, 0))
(gptr)&trigname, trigname_file_parameters))
return 1;
/*
@@ -569,7 +569,7 @@ bool Table_triggers_list::create_trigger(THD *thd, TABLE_LIST *tables,
/* Create trigger definition file. */
if (!sql_create_definition_file(&dir, &file, &triggers_file_type,
(gptr)this, triggers_file_parameters, 0))
(gptr)this, triggers_file_parameters))
return 0;
err_with_cleanup:
@@ -656,7 +656,7 @@ static bool save_trigger_file(Table_triggers_list *triggers, const char *db,
file.str= file_buff;
return sql_create_definition_file(&dir, &file, &triggers_file_type,
(gptr)triggers, triggers_file_parameters, 0);
(gptr)triggers, triggers_file_parameters);
}
@@ -1427,7 +1427,7 @@ Table_triggers_list::change_table_name_in_trignames(const char *db_name,
trigname.trigger_table= *new_table_name;
if (sql_create_definition_file(&dir, &trigname_file, &trigname_file_type,
(gptr)&trigname, trigname_file_parameters, 0))
(gptr)&trigname, trigname_file_parameters))
return trigger;
}