Alexander Korotkov 2a6368343f Add support for nearest-neighbor (KNN) searches to SP-GiST ... 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		2018-09-19 01:54:10 +03:00
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Makefile	Improve index AMs' opclass validation procedures.	2016-01-21 19:47:15 -05:00
amapi.c	Update copyright for 2018	2018-01-02 23:30:12 -05:00
amvalidate.c	Update copyright for 2018	2018-01-02 23:30:12 -05:00
genam.c	Revise BuildIndexValueDescription to simplify it	2018-07-16 20:20:15 -04:00
indexam.c	Add support for nearest-neighbor (KNN) searches to SP-GiST	2018-09-19 01:54:10 +03:00