The table inheritance works mostly

When a table has partitions or inheritance children these are listed as subnodes. A subnode can appear multiple times under different parents as postgresql supports inheriting multiple tables.

The sizes are still missing and maybe some things I have note verified yet are not correct.

pglablib/ui/catalog/tables/TableNode.cpp

@@ -0,0 +1,20 @@
+#include "TableNode.h"
+#include "catalog/PgDatabaseCatalog.h"
+namespace {
+    PgDatabaseCatalog dummyCatalog;
+}
+
+TableNode::TableNode()
+: _class(dummyCatalog, InvalidOid, "", InvalidOid)
+{
+
+}
+
+TableNode::TableNode(const PgClass &cls)
+: _class(cls)
+{}
+
+const TableNode *TableNode::getChildPtr(int index) const
+{
+    return children.at(index).get();
+}