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~> (cube, int) operator was especially designed for knn-gist search. However, knn-gist supports only ascending ordering of results. Nevertheless it would be useful to support descending ordering by ~> (cube, int) operator. We provide workaround for that: negative coordinate give us inversed value of corresponding cube bound. Therefore, knn search using negative coordinate gives us an effect of descending ordering by cube bound. Author: Alexander Korotkov Reviewed by: Tomas Vondra, Andrey Borodin Discussion: https://www.postgresql.org/message-id/flat/a9657f6a-b497-36ff-e56-482a2c7e3292@2ndquadrant.com |
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| expected | ||
| sql | ||
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| CHANGES | ||
| cube--1.0--1.1.sql | ||
| cube--1.1--1.2.sql | ||
| cube--1.2--1.3.sql | ||
| cube--1.2.sql | ||
| cube--1.3--1.4.sql | ||
| cube--unpackaged--1.0.sql | ||
| cube.c | ||
| cube.control | ||
| cubedata.h | ||
| cubeparse.y | ||
| cubescan.l | ||
| Makefile | ||