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row0mysql.c, row0ins.c:

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Fix bug #5961: release the dictionary latch during a long cascaded FOREIGN KEY operation, so that we do not starve other users


innobase/row/row0ins.c:
  Fix bug #5961: release the dictionary latch during a long cascaded FOREIGN KEY operation, so that we do not starve other users
innobase/row/row0mysql.c:
  Fix bug #5961: release the dictionary latch during a long cascaded FOREIGN KEY operation, so that we do not starve other users
This commit is contained in:
unknown 2004-10-22 00:25:57 +03:00
parent ec8779e95a
commit 4f84f90f96
2 changed files with 19 additions and 2 deletions
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17
innobase/row/row0ins.c
View File

@ -966,6 +966,23 @@ row_ins_foreign_check_on_constraint(
err = row_update_cascade_for_mysql(thr, cascade,
foreign->foreign_table);
if (foreign->foreign_table->n_foreign_key_checks_running == 0) {
fprintf(stderr,
"InnoDB: error: table %s has the counter 0 though there is\n"
"InnoDB: a FOREIGN KEY check running on it.\n",
foreign->foreign_table->name);
}
/* Release the data dictionary latch for a while, so that we do not
starve other threads from doing CREATE TABLE etc. if we have a huge
cascaded operation running. The counter n_foreign_key_checks_running
will prevent other users from dropping or ALTERing the table when we
release the latch. */
row_mysql_unfreeze_data_dictionary(thr_get_trx(thr));
row_mysql_freeze_data_dictionary(thr_get_trx(thr));
mtr_start(mtr);
/* Restore pcur position */

4
innobase/row/row0mysql.c
View File

@ -2156,8 +2156,8 @@ row_drop_table_for_mysql(
fputs(" InnoDB: You are trying to drop table ", stderr);
ut_print_name(stderr, table->name);
fputs("\n"
"InnoDB: though there are foreign key check running on it.\n"
"InnoDB: Adding the table to the background drop queue.\n",
"InnoDB: though there is a foreign key check running on it.\n"
"InnoDB: Adding the table to the background drop queue.\n",
stderr);
row_add_table_to_background_drop_list(table);