CreateQuery t_nullable_keys_6 (children 3)
 Identifier t_nullable_keys_6
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType Int64
 Storage definition (children 1)
  Function Memory
