SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) Function less (children 1) ExpressionList (children 2) Function tuple (children 1) ExpressionList (children 1) Identifier number Function tuple (children 1) ExpressionList (children 1) Function toNullable (children 1) ExpressionList (children 1) Function plus (children 1) ExpressionList (children 2) Identifier number Literal UInt64_1 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function numbers (children 1) ExpressionList (children 1) Literal UInt64_1