SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 8)
    Identifier c1.key
    Identifier c1.name
    Identifier c1.ref_valueF32
    Identifier c1.valueF32
    Function minus (alias dF32) (children 1)
     ExpressionList (children 2)
      Identifier c1.ref_valueF32
      Identifier c1.valueF32
    Literal \'prev:\'
    Identifier c2.key
    Identifier c2.ref_valueF32
   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 dF32
       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