SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 4) ExpressionList (children 2) Identifier column Identifier serialization_kind TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier system.parts_columns Function and (children 1) ExpressionList (children 3) Function equals (children 1) ExpressionList (children 2) Identifier table Literal \'t_sparse_detach\' Function equals (children 1) ExpressionList (children 2) Identifier database Function currentDatabase (children 1) ExpressionList Identifier active ExpressionList (children 1) OrderByElement (children 1) Identifier column