SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 4)
    Identifier key
    Identifier ref_valueU8
    Identifier valueU8
    Function minus (alias dU8) (children 1)
     ExpressionList (children 2)
      Identifier ref_valueU8
      Identifier valueU8
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier codecTest
   Function notEquals (children 1)
    ExpressionList (children 2)
     Identifier dU8
     Literal UInt64_0
   Literal UInt64_10
