CreateQuery t_r_null (children 3)
 Identifier t_r_null
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType UInt32
   ColumnDeclaration d (children 1)
    DataType String
 Storage definition (children 1)
  Function Memory
