Added DDL_options_st *thd_ddl_options(const MYSQL_THD thd)

This is used by InnoDB to detect if CREATE...SELECT is used

Other things:
- Changed InnoDB to use thd_ddl_options()
- Removed lock checking code for create...select (Approved by Marko)

sql/sql_class.cc

@@ -499,6 +499,18 @@ int thd_sql_command(const THD *thd)
   return (int) thd->lex->sql_command;
 }
 
+/*
+  Returns options used with DDL's, like IF EXISTS etc...
+  Will returns 'nonsense' if the command was not a DDL.
+*/
+
+extern "C"
+struct DDL_options_st *thd_ddl_options(const THD *thd)
+{
+  return &thd->lex->create_info;
+}
+
+
 extern "C"
 int thd_tx_isolation(const THD *thd)
 {