Bug#44151 using handler commands on information_schema tables crashes server

information schema tables are based on internal tmp tables which are removed
after each statement execution. So HANDLER comands can not be used with
information schema.


mysql-test/r/handler.result:
  test result
mysql-test/t/handler.test:
  test case
sql/sql_handler.cc:
  information schema tables are based on internal tmp tables which are removed
  after each statement execution. So HANDLER comands can not be used with
  information schema.

mysql-test/r/handler.result

@@ -502,3 +502,7 @@ handler t1_alias READ a next where inexistent > 0;
 ERROR 42S22: Unknown column 'inexistent' in 'field list'
 handler t1_alias close;
 drop table t1;
+USE information_schema;
+HANDLER COLUMNS OPEN;
+ERROR HY000: Incorrect usage of HANDLER OPEN and information_schema
+USE test;

mysql-test/t/handler.test

@@ -460,3 +460,11 @@ handler t1_alias read a next;
 handler t1_alias READ a next where inexistent > 0;
 handler t1_alias close;
 drop table t1;
+
+#
+# Bug#44151 using handler commands on information_schema tables crashes server
+#
+USE information_schema;
+--error ER_WRONG_USAGE
+HANDLER COLUMNS OPEN;
+USE test;

sql/sql_handler.cc

@@ -190,6 +190,14 @@ bool mysql_ha_open(THD *thd, TABLE_LIST *tables, bool reopen)
                       tables->db, tables->table_name, tables->alias,
                       (int) reopen));
 
+  if (tables->schema_table)
+  {
+    my_error(ER_WRONG_USAGE, MYF(0), "HANDLER OPEN",
+             INFORMATION_SCHEMA_NAME.str);
+    DBUG_PRINT("exit",("ERROR"));
+    DBUG_RETURN(TRUE);
+  }
+
   if (! hash_inited(&thd->handler_tables_hash))
   {
     /*