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/TableTreeBuilder.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "Pgsql_oids.h"
+#include <map>
+#include <memory>
+
+class PgClass;
+class TableNode;
+class IFindParents;
+
+class TableTreeBuilder
+{
+public:
+    TableTreeBuilder(const std::map<Oid, PgClass> &source, const IFindParents &inheritance);
+
+    std::shared_ptr<TableNode> Build();
+
+private:
+    const std::map<Oid, PgClass> &source;
+    const IFindParents &inheritance;
+    std::map<Oid, std::shared_ptr<TableNode>> processedNodes;
+    std::shared_ptr<TableNode> rootNode;
+
+    void resetState();
+    bool hasParent(const PgClass &cls) const;
+    std::shared_ptr<TableNode>  addNode(const PgClass &cls);
+    void addToplevelNode(std::shared_ptr<TableNode> node);
+    void addToParents(std::shared_ptr<TableNode> node, const std::vector<Oid> &parents);
+    std::shared_ptr<TableNode> getParent(Oid oid);
+    void AssignNodeIndexesAndParents(std::shared_ptr<TableNode> parent);
+};
+