bk commit into 4.1 tree (andrey:1.2611) BUG#24219

[ahristov]

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4.1 repository of andrey. When andrey does a push these changes will
be propagated to the main repository and, within 24 hours after the
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ChangeSet@stripped, 2006-11-16 12:10:55+01:00, andrey@stripped +3 -0
  Fix for bug#24219 ALTER TABLE ... RENAME TO ... , DISABLE KEYS leads to crash
  
  There was an improper order of doing chained operations.
  
  To the documentor: ENABLE|DISABLE KEYS combined with RENAME TO, and no other
  ALTER TABLE clause, leads to server crash independent of the presence of
  indices and data in the table.

  mysql-test/r/alter_table.result@stripped, 2006-11-16 12:10:50+01:00, andrey@stripped +12 -0
    update result

  mysql-test/t/alter_table.test@stripped, 2006-11-16 12:10:50+01:00, andrey@stripped +19 -0
    add test for bug#24129

  sql/sql_table.cc@stripped, 2006-11-16 12:10:50+01:00, andrey@stripped +30 -23
    If there is operation on the KEYS, first do it
    and then do a rename if there is such. Or, we will crash because
    the underlying table has changed.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	andrey
# Host:	example.com
# Root:	/work/bug24219/my41

--- 1.309/sql/sql_table.cc	2006-11-16 12:11:06 +01:00
+++ 1.310/sql/sql_table.cc	2006-11-16 12:11:06 +01:00
@@ -2949,8 +2949,35 @@ int mysql_alter_table(THD *thd,char *new
   thd->proc_info="setup";
   if (alter_info->is_simple && !table->tmp_table)
   {
-    error=0;
-    if (new_name != table_name || new_db != db)
+    switch (alter_info->keys_onoff) {
+    case LEAVE_AS_IS:
+      error= 0;
+      break;
+    case ENABLE:
+      VOID(pthread_mutex_lock(&LOCK_open));
+      wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
+      VOID(pthread_mutex_unlock(&LOCK_open));
+      error= table->file->enable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
+      /* COND_refresh will be signaled in close_thread_tables() */
+      break;
+    case DISABLE:
+      VOID(pthread_mutex_lock(&LOCK_open));
+      wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
+      VOID(pthread_mutex_unlock(&LOCK_open));
+      error= table->file->disable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
+      /* COND_refresh will be signaled in close_thread_tables() */
+      break;
+    }
+
+    if (error == HA_ERR_WRONG_COMMAND)
+    {
+      push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
+			  ER_ILLEGAL_HA, ER(ER_ILLEGAL_HA),
+			  table->table_name);
+      error= 0;
+    }
+
+    if (!error && (new_name != table_name || new_db != db))
     {
       thd->proc_info="rename";
       VOID(pthread_mutex_lock(&LOCK_open));
@@ -2971,27 +2998,6 @@ int mysql_alter_table(THD *thd,char *new
       VOID(pthread_mutex_unlock(&LOCK_open));
     }
 
-    if (!error)
-    {
-      switch (alter_info->keys_onoff) {
-      case LEAVE_AS_IS:
-	break;
-      case ENABLE:
-	VOID(pthread_mutex_lock(&LOCK_open));
-	wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
-	VOID(pthread_mutex_unlock(&LOCK_open));
-	error= table->file->enable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
-	/* COND_refresh will be signaled in close_thread_tables() */
-	break;
-      case DISABLE:
-	VOID(pthread_mutex_lock(&LOCK_open));
-	wait_while_table_is_used(thd, table, HA_EXTRA_FORCE_REOPEN);
-	VOID(pthread_mutex_unlock(&LOCK_open));
-	error=table->file->disable_indexes(HA_KEY_SWITCH_NONUNIQ_SAVE);
-	/* COND_refresh will be signaled in close_thread_tables() */
-	break;
-      }
-    }
     if (error == HA_ERR_WRONG_COMMAND)
     {
       push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
@@ -2999,6 +3005,7 @@ int mysql_alter_table(THD *thd,char *new
 			  table->table_name);
       error=0;
     }
+
     if (!error)
     {
       mysql_update_log.write(thd, thd->query, thd->query_length);

--- 1.49/mysql-test/r/alter_table.result	2006-11-16 12:11:06 +01:00
+++ 1.50/mysql-test/r/alter_table.result	2006-11-16 12:11:06 +01:00
@@ -543,3 +543,15 @@ ERROR 3D000: No database selected
 alter table test.t1 rename test.t1;
 use test;
 drop table t1;
+DROP TABLE IF EXISTS bug24219;
+DROP TABLE IF EXISTS bug24219_2;
+CREATE TABLE bug24219 (a INT, INDEX(a));
+INSERT INTO bug24219 VALUES (1), (1), (2), (3), (5), (8), (13);
+EXPLAIN SELECT a FROM bug24219 WHERE a BETWEEN 2 AND 6;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	bug24219	range	a	a	5	NULL	2	Using where; Using index
+ALTER TABLE bug24219 RENAME TO bug24219_2, DISABLE KEYS;
+EXPLAIN SELECT a FROM bug24219_2 WHERE a BETWEEN 2 AND 6;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	bug24219_2	ALL	NULL	NULL	NULL	NULL	7	Using where
+DROP TABLE bug24219_2;

--- 1.39/mysql-test/t/alter_table.test	2006-11-16 12:11:06 +01:00
+++ 1.40/mysql-test/t/alter_table.test	2006-11-16 12:11:06 +01:00
@@ -392,4 +392,23 @@ alter table test.t1 rename test.t1;
 use test;
 drop table t1;
 
+#
+# Bug#24219 - ALTER TABLE ... RENAME TO ... , DISABLE KEYS leads to crash
+#
+--disable_warnings
+DROP TABLE IF EXISTS bug24219;
+DROP TABLE IF EXISTS bug24219_2;
+--enable_warnings
+
+CREATE TABLE bug24219 (a INT, INDEX(a));
+INSERT INTO bug24219 VALUES (1), (1), (2), (3), (5), (8), (13);
+
+EXPLAIN SELECT a FROM bug24219 WHERE a BETWEEN 2 AND 6;
+
+ALTER TABLE bug24219 RENAME TO bug24219_2, DISABLE KEYS;
+
+EXPLAIN SELECT a FROM bug24219_2 WHERE a BETWEEN 2 AND 6;
+
+DROP TABLE bug24219_2;
+
 # End of 4.1 tests