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