diff options
Diffstat (limited to 'src/backend/access/gist/gistproc.c')
| -rw-r--r-- | src/backend/access/gist/gistproc.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/backend/access/gist/gistproc.c b/src/backend/access/gist/gistproc.c index 9fab6c87c0..9d21e3fb94 100644 --- a/src/backend/access/gist/gistproc.c +++ b/src/backend/access/gist/gistproc.c @@ -152,6 +152,16 @@ gist_box_decompress(PG_FUNCTION_ARGS) } /* + * GiST Fetch method for boxes + * do not do anything --- we just return the stored box as is. + */ +Datum +gist_box_fetch(PG_FUNCTION_ARGS) +{ + PG_RETURN_POINTER(PG_GETARG_POINTER(0)); +} + +/* * The GiST Penalty method for boxes (also used for points) * * As in the R-tree paper, we use change in area as our penalty metric @@ -1186,6 +1196,33 @@ gist_point_compress(PG_FUNCTION_ARGS) PG_RETURN_POINTER(entry); } +/* + * GiST Fetch method for point + * + * Get point coordinates from its bounding box coordinates and form new + * gistentry. + */ +Datum +gist_point_fetch(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + BOX *in = DatumGetBoxP(entry->key); + Point *r; + GISTENTRY *retval; + + retval = palloc(sizeof(GISTENTRY)); + + r = (Point *) palloc(sizeof(Point)); + r->x = in->high.x; + r->y = in->high.y; + gistentryinit(*retval, PointerGetDatum(r), + entry->rel, entry->page, + entry->offset, FALSE); + + PG_RETURN_POINTER(retval); +} + + #define point_point_distance(p1,p2) \ DatumGetFloat8(DirectFunctionCall2(point_distance, \ PointPGetDatum(p1), PointPGetDatum(p2))) |