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Tom Lane f009c316ba Tweak code so that pg_subtrans is never consulted for XIDs older than ... RecentXmin (== MyProc->xmin). This ensures that it will be safe to truncate pg_subtrans at RecentGlobalXmin, which should largely eliminate any fear of bloat. Along the way, eliminate SubTransXidsHaveCommonAncestor, which isn't really needed and could not give a trustworthy result anyway under the lookback restriction. In an unrelated but nearby change, #ifdef out GetUndoRecPtr, which has been dead code since 2001 and seems unlikely to ever be resurrected.		22 years ago
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backend	Tweak code so that pg_subtrans is never consulted for XIDs older than	22 years ago
bin	…
corba	…
include	Tweak code so that pg_subtrans is never consulted for XIDs older than	22 years ago
interfaces	…
makefiles	…
pl	…
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template	…
test	…
timezone	…
tools	…
tutorial	…
utils	…
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Makefile	…
Makefile.global.in	…
Makefile.shlib	…
bcc32.mak	…
nls-global.mk	…
win32.mak	…