diff options
| author | Teodor Sigaev <teodor@sigaev.ru> | 2017-12-22 13:33:16 +0300 |
|---|---|---|
| committer | Teodor Sigaev <teodor@sigaev.ru> | 2017-12-22 13:33:16 +0300 |
| commit | 854823fa334cb826eed50da751801d0693b10173 (patch) | |
| tree | 437b74de241ede698bc1f9734f40829ee648b93e /src/include/access/spgist_private.h | |
| parent | 9373baa0f764392c504df034afd2f6b178c29491 (diff) | |
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
Diffstat (limited to 'src/include/access/spgist_private.h')
| -rw-r--r-- | src/include/access/spgist_private.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/include/access/spgist_private.h b/src/include/access/spgist_private.h index 1c4b321b6c6..e55de9dc548 100644 --- a/src/include/access/spgist_private.h +++ b/src/include/access/spgist_private.h @@ -119,7 +119,8 @@ typedef struct SpGistState { spgConfigOut config; /* filled in by opclass config method */ - SpGistTypeDesc attType; /* type of input data and leaf values */ + SpGistTypeDesc attType; /* type of values to be indexed/restored */ + SpGistTypeDesc attLeafType; /* type of leaf-tuple values */ SpGistTypeDesc attPrefixType; /* type of inner-tuple prefix values */ SpGistTypeDesc attLabelType; /* type of node label values */ @@ -178,7 +179,8 @@ typedef struct SpGistCache { spgConfigOut config; /* filled in by opclass config method */ - SpGistTypeDesc attType; /* type of input data and leaf values */ + SpGistTypeDesc attType; /* type of values to be indexed/restored */ + SpGistTypeDesc attLeafType; /* type of leaf-tuple values */ SpGistTypeDesc attPrefixType; /* type of inner-tuple prefix values */ SpGistTypeDesc attLabelType; /* type of node label values */ @@ -300,7 +302,7 @@ typedef SpGistLeafTupleData *SpGistLeafTuple; #define SGLTHDRSZ MAXALIGN(sizeof(SpGistLeafTupleData)) #define SGLTDATAPTR(x) (((char *) (x)) + SGLTHDRSZ) -#define SGLTDATUM(x, s) ((s)->attType.attbyval ? \ +#define SGLTDATUM(x, s) ((s)->attLeafType.attbyval ? \ *(Datum *) SGLTDATAPTR(x) : \ PointerGetDatum(SGLTDATAPTR(x))) |