834d9284b4
Several queries in the privileges regression test cause the planner to apply the plpgsql function "leak()" to every element of the histogram for atest12.b. Since commit 0c882e52a increased the size of that histogram to 10000 entries, the test invokes that function over 100000 times, which takes an absolutely unreasonable amount of time in clobber-cache-always mode. However, there's no real reason why that has to be a plpgsql function: for the purposes of this test, all that matters is that it not be marked leakproof. So we can replace the plpgsql implementation with a direct call of int4lt, which has the same behavior and is orders of magnitude faster. This is expected to cut several hours off the buildfarm cycle time for CCA animals. It has some positive impact in normal builds too, though that's probably lost in the noise. Back-patch to v13 where 0c882e52a came in. Discussion: https://postgr.es/m/575884.1620626638@sss.pgh.pa.us
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