Re: [HACKERS] Doubt in heap_release_fetch

2008-03-06 Thread Tom Lane
Suresh <[EMAIL PROTECTED]> writes: > What is the time qualification check ? HeapTupleSatisfiesVisibility(). See src/include/utils/tqual.h src/backend/utils/time/tqual.c and if none of this is making any sense maybe you need to start here: http://developer.postgresql.org/pgdocs/postgres/mvcc.html

[HACKERS] Doubt in heap_release_fetch

2008-03-06 Thread Suresh
Hello, What do the following lines mean : /* Tuple failed time qual, but maybe caller wants to see it anyway. */ if (keep_buf) *userbuf = buffer; else { ReleaseBuffer(buffer); *userbuf = InvalidBuffer; } What is th