SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 4) ExpressionList (children 2) Identifier number Function anyIf (children 1) ExpressionList (children 2) Function toNullable (children 1) ExpressionList (children 1) Literal \'Hello\' Function equals (children 1) ExpressionList (children 2) Function arrayJoin (children 1) ExpressionList (children 1) Literal Array_[UInt64_1, NULL, UInt64_0] Literal UInt64_0 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function numbers (children 1) ExpressionList (children 1) Literal UInt64_2 ExpressionList (children 1) Identifier number ExpressionList (children 1) OrderByElement (children 1) Identifier number