public MetaContext ExecuteCache()
{
OutRelationsByTable = AllRelations.Values.ToLookup(x => x.FkColumnRef.TableRef);
InRelationsByTable = AllRelations.Values.ToLookup(x => x.PkColumnRef.TableRef);
ColumnsByTable = AllColumns.Values.ToLookup(x => x.TableRef);
return this;
}