SelectWithUnionQuery (children 2) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 2) Asterisk Function throwIf (children 1) ExpressionList (children 1) Function notEquals (children 1) ExpressionList (children 2) Identifier val Literal \'one\' TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) TableIdentifier column_modify_test Function equals (children 1) ExpressionList (children 2) Identifier id Literal UInt64_1 Identifier CSV