GIN: Generalized Inverted iNdex.

contrib/tsearch2/Makefile

contrib/tsearch2/expected/tsearch2.out

contrib/tsearch2/ginidx.c

contrib/tsearch2/sql/tsearch2.sql

contrib/tsearch2/tsearch.sql.in

src/backend/access/Makefile

src/backend/access/gin/Makefile

src/backend/access/gin/README

src/backend/access/gin/ginarrayproc.c

src/backend/access/gin/ginbtree.c

src/backend/access/gin/ginbulk.c

src/backend/access/gin/gindatapage.c

src/backend/access/gin/ginentrypage.c

src/backend/access/gin/ginget.c

src/backend/access/gin/gininsert.c

src/backend/access/gin/ginscan.c

src/backend/access/gin/ginutil.c

src/backend/access/gin/ginvacuum.c

src/backend/access/gin/ginxlog.c

src/backend/access/transam/rmgr.c