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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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39
sql/sql_delete.cc
View File

@ -356,12 +356,28 @@ bool mysql_multi_delete_prepare(THD *thd)
&lex->select_lex.leaf_tables, FALSE, FALSE))
DBUG_RETURN(TRUE);
/*
Multi-delete can't be constructed over-union => we always have
single SELECT on top and have to check underlying SELECTs of it
*/
lex->select_lex.exclude_from_table_unique_test= TRUE;
/* Fix tables-to-be-deleted-from list to point at opened tables */
for (target_tbl= (TABLE_LIST*) aux_tables;
target_tbl;
target_tbl= target_tbl->next_local)
{
target_tbl->table= target_tbl->correspondent_table->table;
if (!(target_tbl->table= target_tbl->correspondent_table->table))
{
DBUG_ASSERT(target_tbl->correspondent_table->view &&
target_tbl->correspondent_table->ancestor &&
target_tbl->correspondent_table->ancestor->next_local);
my_error(ER_VIEW_DELETE_MERGE_VIEW, MYF(0),
target_tbl->correspondent_table->view_db.str,
target_tbl->correspondent_table->view_name.str);
DBUG_RETURN(TRUE);
}
if (!target_tbl->correspondent_table->updatable ||
check_key_in_view(thd, target_tbl->correspondent_table))
{
@ -370,23 +386,14 @@ bool mysql_multi_delete_prepare(THD *thd)
DBUG_RETURN(TRUE);
}
/*
Check are deleted table used somewhere inside subqueries.
Multi-delete can't be constructed over-union => we always have
single SELECT on top and have to check underlying SELECTs of it
Check that table from which we delete is not used somewhere
inside subqueries/view.
*/
for (SELECT_LEX_UNIT *un= lex->select_lex.first_inner_unit();
un;
un= un->next_unit())
if (unique_table(target_tbl->correspondent_table, lex->query_tables))
{
if (un->first_select()->linkage != DERIVED_TABLE_TYPE &&
un->check_updateable(target_tbl->correspondent_table->db,
target_tbl->correspondent_table->table_name))
{
my_error(ER_UPDATE_TABLE_USED, MYF(0),
target_tbl->correspondent_table->table_name);
DBUG_RETURN(TRUE);
}
my_error(ER_UPDATE_TABLE_USED, MYF(0),
target_tbl->correspondent_table->table_name);
DBUG_RETURN(TRUE);
}
}
DBUG_RETURN(FALSE);