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Create a script that can renumber manually-assigned OIDs.
This commit adds a Perl script renumber_oids.pl, which can reassign arange of manually-assigned OIDs to someplace else by modifying OIDfields of the catalog *.dat files and OID-assigning macros in thecatalog *.h files.Up to now, we've encouraged new patches that need manually-assignedOIDs to use OIDs just above the range of existing OIDs. Predictably,this leads to patches stepping on each others' toes, as whicheverone gets committed first creates an OID conflict that other patchauthor(s) have to resolve manually. With the availability ofrenumber_oids.pl, we can eliminate a lot of this hassle.The new project policy, therefore, is:* Encourage new patches to use high OIDs (the documentation suggestschoosing a block of OIDs at random in 8000..9999).* After feature freeze in each development cycle, run renumber_oids.plto move all such OIDs down to lower numbers, thus freeing the high OIDrange for the next development cycle.This plan should greatly reduce the risk of OID collisions betweenconcurrently-developed patches. Also, if such a collision happensanyway, we have the option to resolve it without much effort by doingan off-schedule OID renumbering to get the first-committed patch outof the way. Or a patch author could use renumber_oids.pl to changetheir patch's assignments without much pain.This approach does put a premium on not hard-wiring any OID valuesin places where renumber_oids.pl and genbki.pl can't fix them.Project practice in that respect seems to be pretty good already,but a follow-on patch will sand down some rough edges.John Naylor and Tom Lane, per an idea of Peter Geoghegan'sDiscussion:https://postgr.es/m/CAH2-WzmMTGMcPuph4OvsO7Ykut0AOCF_i-=eaochT0dd2BN9CQ@mail.gmail.com1 parentb5afdde commita641707
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6 files changed
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lines changed- doc/src/sgml
- src
- backend/catalog
- include/catalog
- tools
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