SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 2)
    Identifier path
    Identifier name
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.zookeeper
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier path
     Literal \'/keeper\'
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier path
    OrderByElement (children 1)
     Identifier name
   Set
