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fixed mechanism of detection selection from table wich we update

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(BUG##9398, BUG#8703)
fixed wrong join view detection in multi-delete which lead to server crash
This commit is contained in:
bell@sanja.is.com.ua
2005-03-28 15:13:31 +03:00
parent eeeedd31b9
commit 1659dacab1
15 changed files with 561 additions and 165 deletions
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23
sql/sql_update.cc
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@ -691,16 +691,6 @@ bool mysql_multi_update_prepare(THD *thd)
DBUG_RETURN(TRUE);
}
/*
Multi-update can't be constructed over-union => we always have
single SELECT on top and have to check underlying SELECTs of it
*/
if (lex->select_lex.check_updateable_in_subqueries(tl->db,
tl->table_name))
{
my_error(ER_UPDATE_TABLE_USED, MYF(0), tl->table_name);
DBUG_RETURN(TRUE);
}
DBUG_PRINT("info",("setting table `%s` for update", tl->alias));
tl->lock_type= lex->multi_lock_option;
tl->updating= 1;
@ -781,6 +771,11 @@ bool mysql_multi_update_prepare(THD *thd)
DBUG_RETURN(TRUE);
}
/*
Check that we are not using table that we are updating, but we should
skip all tables of UPDATE SELECT itself
*/
lex->select_lex.exclude_from_table_unique_test= TRUE;
/* We only need SELECT privilege for columns in the values list */
for (tl= leaves; tl; tl= tl->next_leaf)
{
@ -794,11 +789,19 @@ bool mysql_multi_update_prepare(THD *thd)
}
DBUG_PRINT("info", ("table: %s want_privilege: %u", tl->alias,
(uint) table->grant.want_privilege));
if (tl->lock_type != TL_READ &&
tl->lock_type != TL_READ_NO_INSERT &&
unique_table(tl, table_list))
{
my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->table_name);
DBUG_RETURN(TRUE);
}
}
if (thd->fill_derived_tables() &&
mysql_handle_derived(lex, &mysql_derived_filling))
DBUG_RETURN(TRUE);
DBUG_RETURN (FALSE);
}