CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration x (children 1)
    DataType UInt8
   ColumnDeclaration y (children 1)
    DataType UInt8
   ColumnDeclaration z (children 2)
    DataType String
    Function toString (children 1)
     ExpressionList (children 1)
      Identifier x
 Storage definition (children 2)
  Identifier x
  Identifier x
