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path: root/src/backend/access/spgist/spgproc.c
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* Update copyrights for 2020Bruce Momjian2020-01-01
| | | | Backpatch-through: update all files in master, backpatch legal files through 9.4
* Update copyright for 2019Bruce Momjian2019-01-02
| | | | Backpatch-through: certain files through 9.4
* Add support for nearest-neighbor (KNN) searches to SP-GiSTAlexander Korotkov2018-09-19
Currently, KNN searches were supported only by GiST. SP-GiST also capable to support them. This commit implements that support. SP-GiST scan stack is replaced with queue, which serves as stack if no ordering is specified. KNN support is provided for three SP-GIST opclasses: quad_point_ops, kd_point_ops and poly_ops (catversion is bumped). Some common parts between GiST and SP-GiST KNNs are extracted into separate functions. Discussion: https://postgr.es/m/570825e8-47d0-4732-2bf6-88d67d2d51c8%40postgrespro.ru Author: Nikita Glukhov, Alexander Korotkov based on GSoC work by Vlad Sterzhanov Review: Andrey Borodin, Alexander Korotkov
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