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The reverted changes were intended to force a choice of whether any newly-added BufferGetPage() calls needed to be accompanied by a test of the snapshot age, to support the "snapshot too old" feature. Such an accompanying test is needed in about 7% of the cases, where the page is being used as part of a scan rather than positioning for other purposes (such as DML or vacuuming). The additional effort required for back-patching, and the doubt whether the intended benefit would really be there, have indicated it is best just to rely on developers to do the right thing based on comments and existing usage, as we do with many other conventions. This change should have little or no effect on generated executable code. Motivated by the back-patching pain of Tom Lane and Robert Haas |
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| .. | ||
| expected | ||
| sql | ||
| t | ||
| .gitignore | ||
| blcost.c | ||
| blinsert.c | ||
| bloom--1.0.sql | ||
| bloom.control | ||
| bloom.h | ||
| blscan.c | ||
| blutils.c | ||
| blvacuum.c | ||
| blvalidate.c | ||
| Makefile | ||