mysqldump would not dump the INFORMATION_SCHEMA even when it was explicitly

requested. (Bug #33762)

client/mysqldump.c

@@ -3813,6 +3813,10 @@ static int dump_all_databases()
     return 1;
   while ((row= mysql_fetch_row(tableres)))
   {
+    if (mysql_get_server_version(mysql) >= 50003 &&
+        !my_strcasecmp(&my_charset_latin1, row[0], "information_schema"))
+      continue;
+
     if (dump_all_tables_in_db(row[0]))
       result=1;
   }
@@ -3827,6 +3831,10 @@ static int dump_all_databases()
     }
     while ((row= mysql_fetch_row(tableres)))
     {
+      if (mysql_get_server_version(mysql) >= 50003 &&
+          !my_strcasecmp(&my_charset_latin1, row[0], "information_schema"))
+        continue;
+
       if (dump_all_views_in_db(row[0]))
         result=1;
     }
@@ -3933,10 +3941,6 @@ int init_dumping_tables(char *qdatabase)
 
 static int init_dumping(char *database, int init_func(char*))
 {
-  if (mysql_get_server_version(mysql) >= 50003 &&
-      !my_strcasecmp(&my_charset_latin1, database, "information_schema"))
-    return 1;
-
   if (mysql_select_db(mysql, database))
   {
     DB_error(mysql, "when selecting the database");
@@ -3995,6 +3999,7 @@ static int dump_all_tables_in_db(char *database)
     DBUG_RETURN(1);
   if (opt_xml)
     print_xml_tag(md_result_file, "", "\n", "database", "name=", database, NullS);
+
   if (lock_tables)
   {
     DYNAMIC_STRING query;
@@ -4228,7 +4233,10 @@ static int dump_selected_tables(char *db, char **table_names, int tables)
   }
   end= pos;
 
-  if (lock_tables)
+  /* Can't LOCK TABLES in INFORMATION_SCHEMA, so don't try. */
+  if (lock_tables &&
+      !(mysql_get_server_version(mysql) >= 50003 &&
+        !my_strcasecmp(&my_charset_latin1, db, "information_schema")))
   {
     if (mysql_real_query(mysql, lock_tables_query.str,
                          lock_tables_query.length-1))

mysql-test/r/mysqldump.result

@@ -3563,9 +3563,6 @@ grant REPLICATION CLIENT on *.* to mysqltest_1@localhost;
 drop table t1;
 drop user mysqltest_1@localhost;
 #
-# Bug#21527 mysqldump incorrectly tries to LOCK TABLES on the
-#           information_schema database.
-#
 # Bug#21424 mysqldump failing to export/import views
 #
 create database mysqldump_myDB;
@@ -3605,6 +3602,39 @@ drop user myDB_User@localhost;
 drop database mysqldump_myDB;
 use test;
 #
+# Bug #21527 mysqldump incorrectly tries to LOCK TABLES on the 
+# information_schema database.
+#
+# Bug #33762: mysqldump can not dump INFORMATION_SCHEMA
+#
+DROP TABLE IF EXISTS `TABLES`;
+/*!40101 SET @saved_cs_client     = @@character_set_client */;
+/*!40101 SET character_set_client = utf8 */;
+CREATE TEMPORARY TABLE `TABLES` (
+  `TABLE_CATALOG` varchar(512) DEFAULT NULL,
+  `TABLE_SCHEMA` varchar(64) NOT NULL DEFAULT '',
+  `TABLE_NAME` varchar(64) NOT NULL DEFAULT '',
+  `TABLE_TYPE` varchar(64) NOT NULL DEFAULT '',
+  `ENGINE` varchar(64) DEFAULT NULL,
+  `VERSION` bigint(21) unsigned DEFAULT NULL,
+  `ROW_FORMAT` varchar(10) DEFAULT NULL,
+  `TABLE_ROWS` bigint(21) unsigned DEFAULT NULL,
+  `AVG_ROW_LENGTH` bigint(21) unsigned DEFAULT NULL,
+  `DATA_LENGTH` bigint(21) unsigned DEFAULT NULL,
+  `MAX_DATA_LENGTH` bigint(21) unsigned DEFAULT NULL,
+  `INDEX_LENGTH` bigint(21) unsigned DEFAULT NULL,
+  `DATA_FREE` bigint(21) unsigned DEFAULT NULL,
+  `AUTO_INCREMENT` bigint(21) unsigned DEFAULT NULL,
+  `CREATE_TIME` datetime DEFAULT NULL,
+  `UPDATE_TIME` datetime DEFAULT NULL,
+  `CHECK_TIME` datetime DEFAULT NULL,
+  `TABLE_COLLATION` varchar(32) DEFAULT NULL,
+  `CHECKSUM` bigint(21) unsigned DEFAULT NULL,
+  `CREATE_OPTIONS` varchar(255) DEFAULT NULL,
+  `TABLE_COMMENT` varchar(80) NOT NULL DEFAULT ''
+) ENGINE=MEMORY DEFAULT CHARSET=utf8;
+/*!40101 SET character_set_client = @saved_cs_client */;
+#
 # Bug#19745 mysqldump --xml produces invalid xml
 #
 DROP TABLE IF EXISTS t1;

mysql-test/t/mysqldump.test

@@ -1395,9 +1395,6 @@ drop table t1;
 drop user mysqltest_1@localhost;
 
 
---echo #
---echo # Bug#21527 mysqldump incorrectly tries to LOCK TABLES on the
---echo #           information_schema database.
 --echo #
 --echo # Bug#21424 mysqldump failing to export/import views
 --echo #
@@ -1464,6 +1461,13 @@ disconnect root;
 --remove_file $MYSQLTEST_VARDIR/tmp/bug21527.sql
 use test;
 
+--echo #
+--echo # Bug #21527 mysqldump incorrectly tries to LOCK TABLES on the 
+--echo # information_schema database.
+--echo #
+--echo # Bug #33762: mysqldump can not dump INFORMATION_SCHEMA
+--echo #
+--exec $MYSQL_DUMP --compact --opt -d information_schema tables
 
 --echo #
 --echo # Bug#19745 mysqldump --xml produces invalid xml