Hi hackers, While contemplating plans to use new kinds of OIDs in buffer tags, I noticed $SUBJECT. It says:
* Check for wraparound of the OID counter. We *must* not return 0 * (InvalidOid); and as long as we have to check that, it seems a good * idea to skip over everything below FirstNormalObjectId too. (This * basically just avoids lots of collisions with bootstrap-assigned OIDs * right after a wrap occurs, so as to avoid a possibly large number of * iterations in GetNewOid.) Note we are relying on unsigned comparison. That makes it sound like a mere optimisation, but since commit 8e18d04d4da user-created objects are not allowed to have OIDs below that threshold. So I propose the attached tweak. -- Thomas Munro http://www.enterprisedb.com
0001-Improve-comment-in-GetNewObjectId.patch
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