Log Message: ----------- GiST improvements: - make sure we always invoke user-supplied GiST methods in a short-lived memory context. This means the backend isn't exposed to any memory leaks that be in those methods (in fact, it is probably a net loss for most GiST methods to bother manually freeing memory now). This also means we can do away with a lot of ugly manual memory management in the GiST code itself. - keep the current page of a GiST index scan pinned, rather than doing a ReadBuffer() for each tuple produced by the scan. Since ReadBuffer() is expensive, this is a perf. win - implement dead tuple killing for GiST indexes (which is easy to do, now that we keep a pin on the current scan page). Now all the builtin indexes implement dead tuple killing. - cleanup a lot of ugly code in GiST Modified Files: -------------- pgsql/doc/src/sgml: gist.sgml (r1.17 -> r1.18) (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/gist.sgml.diff?r1=1.17&r2=1.18) pgsql/src/backend/access/gist: gist.c (r1.115 -> r1.116) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gist/gist.c.diff?r1=1.115&r2=1.116) gistget.c (r1.45 -> r1.46) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gist/gistget.c.diff?r1=1.45&r2=1.46) gistscan.c (r1.56 -> r1.57) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gist/gistscan.c.diff?r1=1.56&r2=1.57) pgsql/src/include/access: gist.h (r1.44 -> r1.45) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/access/gist.h.diff?r1=1.44&r2=1.45)
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