SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 6)
   ExpressionList (children 2)
    Identifier uid
    Function retention (alias r) (children 1)
     ExpressionList (children 3)
      Literal UInt64_1
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier date
        Literal \'2018-08-06\'
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier date
        Literal \'2018-08-07\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier retention_test
   Function in (children 1)
    ExpressionList (children 2)
     Identifier date
     Literal Tuple_(\'2018-08-06\', \'2018-08-07\')
   ExpressionList (children 1)
    Identifier uid
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier uid
   Literal UInt64_5