SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 8)
    Identifier c1.key
    Identifier c1.name
    Identifier c1.ref_valueF64
    Identifier c1.valueF64
    Function minus (alias dF64) (children 1)
     ExpressionList (children 2)
      Identifier c1.ref_valueF64
      Identifier c1.valueF64
    Literal \'prev:\'
    Identifier c2.key
    Identifier c2.ref_valueF64
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier codecTest (alias c1)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier codecTest (alias c2)
     TableJoin
   Function and (children 1)
    ExpressionList (children 2)
     Function notEquals (children 1)
      ExpressionList (children 2)
       Identifier dF64
       Literal UInt64_0
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier c2.key
       Function minus (children 1)
        ExpressionList (children 2)
         Identifier c1.key
         Literal UInt64_1
   Literal UInt64_10