#13079 Fix entity resolution in templates

For databases without catalogs and schemas

plugins/org.jkiss.dbeaver.ui.editors.sql/src/org/jkiss/dbeaver/ui/editors/sql/templates/SQLEntityResolver.java

@@ -71,6 +71,10 @@ class SQLEntityResolver extends SQLObjectResolver<DBSEntity> {
         } else {
             objectContainer = DBUtils.getSelectedObject(executionContext, DBSObjectContainer.class);
         }
+        if (objectContainer == null) {
+            // Possibly neither catalogs nor schemas are supported
+            objectContainer = DBUtils.getAdapter(DBSObjectContainer.class, executionContext.getDataSource());
+        }
         if (objectContainer != null) {
             makeProposalsFromChildren(monitor, objectContainer, entities);
         }