Added transitional code for installations running with acs-kernel prior to version 5.8.1a6,or later before running upgrade scripts: some ::xo::db::sql::utility methods would be missing,so they are transitionally defined on the fly.
- add attribute "create_table_attribute" to "::xo::db::Attribute" to contol the creation of somewhat magic attributes (e.g. "text" of the acs content repository)
As we now have ::xo::db::sql::util interface to check for database object's existance,there is no need for inline sql snippets in the code for such task.
Created stored procedures to check for table, columns, view and index existance.On xotcl-core powered installations, they will trigger the creation of OO methodsin the ::xo::db::sql::util namespace.