SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 5)
    Identifier key
    Identifier val1
    Identifier val2
    Function greater (alias x1) (children 1)
     ExpressionList (children 2)
      Function assumeNotNull (children 1)
       ExpressionList (children 1)
        Identifier val1
      Identifier val2
    Function greater (alias x2) (children 1)
     ExpressionList (children 2)
      Identifier val1
      Identifier val2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier data
   Function greater (children 1)
    ExpressionList (children 2)
     Function assumeNotNull (children 1)
      ExpressionList (children 1)
       Identifier val1
     Literal UInt64_0
   Function notEquals (children 1)
    ExpressionList (children 2)
     Identifier x1
     Identifier x2
   Set
