From 854823fa334cb826eed50da751801d0693b10173 Mon Sep 17 00:00:00 2001 From: Teodor Sigaev Date: Fri, 22 Dec 2017 13:33:16 +0300 Subject: Add optional compression method to SP-GiST Patch allows to have different types of column and value stored in leaf tuples of SP-GiST. The main application of feature is to transform complex column type to simple indexed type or for truncating too long value, transformation could be lossy. Simple example: polygons are converted to their bounding boxes, this opclass follows. Authors: me, Heikki Linnakangas, Alexander Korotkov, Nikita Glukhov Reviewed-By: all authors + Darafei Praliaskouski Discussions: https://www.postgresql.org/message-id/5447B3FF.2080406@sigaev.ru https://www.postgresql.org/message-id/flat/54907069.1030506@sigaev.ru#54907069.1030506@sigaev.ru --- src/include/access/spgist.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src/include/access/spgist.h') diff --git a/src/include/access/spgist.h b/src/include/access/spgist.h index d1bc396e6df..06b1d88e5a7 100644 --- a/src/include/access/spgist.h +++ b/src/include/access/spgist.h @@ -30,7 +30,9 @@ #define SPGIST_PICKSPLIT_PROC 3 #define SPGIST_INNER_CONSISTENT_PROC 4 #define SPGIST_LEAF_CONSISTENT_PROC 5 -#define SPGISTNProc 5 +#define SPGIST_COMPRESS_PROC 6 +#define SPGISTNRequiredProc 5 +#define SPGISTNProc 6 /* * Argument structs for spg_config method @@ -44,6 +46,7 @@ typedef struct spgConfigOut { Oid prefixType; /* Data type of inner-tuple prefixes */ Oid labelType; /* Data type of inner-tuple node labels */ + Oid leafType; /* Data type of leaf-tuple values */ bool canReturnData; /* Opclass can reconstruct original data */ bool longValuesOK; /* Opclass can cope with values > 1 page */ } spgConfigOut; -- cgit v1.2.3