Re: [HACKERS] Unneccessary cmax in heap tuple ?

[devik]

Tom Lane wrote:
> In situations like SQL function calls, it may be necessary to suspend
> a table scan while we go off and do other commands, then come back and
> resume the table scan.  So there can be multiple scans with different
> command IDs in progress within a transaction.

Ohh yes .. you are right. Thanks for explanation.
devik