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Merge hundin.mysql.fi:/home/heikki/mysql-4.0

Browse source 
into hundin.mysql.fi:/home/heikki/mysql-4.1
This commit is contained in:
heikki@hundin.mysql.fi 2004-12-27 17:19:27 +02:00
commit 3595bcd72e
2 changed files with 37 additions and 5 deletions
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26
innobase/row/row0ins.c
View file

@ -1415,8 +1415,34 @@ row_ins_check_foreign_constraints(
row_mysql_freeze_data_dictionary(trx);
}
if (foreign->referenced_table) {
mutex_enter(&(dict_sys->mutex));
(foreign->referenced_table
->n_foreign_key_checks_running)++;
mutex_exit(&(dict_sys->mutex));
}
/* NOTE that if the thread ends up waiting for a lock
we will release dict_operation_lock temporarily!
But the counter on the table protects the referenced
table from being dropped while the check is running. */
err = row_ins_check_foreign_constraint(TRUE, foreign,
table, entry, thr);
if (foreign->referenced_table) {
mutex_enter(&(dict_sys->mutex));
ut_a(foreign->referenced_table
->n_foreign_key_checks_running > 0);
(foreign->referenced_table
->n_foreign_key_checks_running)--;
mutex_exit(&(dict_sys->mutex));
}
if (got_s_lock) {
row_mysql_unfreeze_data_dictionary(trx);
}

14
innobase/row/row0mysql.c
View file

@ -1833,6 +1833,12 @@ row_drop_table_for_mysql_in_background(
trx = trx_allocate_for_background();
/* If the original transaction was dropping a table referenced by
foreign keys, we must set the following to be able to drop the
table: */
trx->check_foreigns = FALSE;
/* fputs("InnoDB: Error: Dropping table ", stderr);
ut_print_name(stderr, name);
fputs(" in background drop list\n", stderr); */
@ -1907,16 +1913,16 @@ loop:
goto already_dropped;
}
if (table->n_mysql_handles_opened > 0
|| table->n_foreign_key_checks_running > 0) {
if (DB_SUCCESS != row_drop_table_for_mysql_in_background(
drop->table_name)) {
/* If the DROP fails for some table, we return, and let the
main thread retry later */
return(n_tables + n_tables_dropped);
}
n_tables_dropped++;
row_drop_table_for_mysql_in_background(drop->table_name);
already_dropped:
mutex_enter(&kernel_mutex);