SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) Function multiIf (children 1) ExpressionList (children 5) Literal UInt64_1 Literal \'foo\' Literal UInt64_1 Literal \'bar\' Function toFixedString (children 1) ExpressionList (children 2) Identifier col4 Literal UInt64_16 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier multi_if_check