pgsql-server/src/backend/utils/sort tuplesort.c

CVSROOT:    /cvsroot
Module name:    pgsql-server
Changes by:    tgl@svr1.postgresql.org    04/03/17 18:24:58

Modified files:
    src/backend/utils/sort: tuplesort.c

Log message:
    During btree index build, sort equal-keyed tuples according to their
    TID (heap position).  This doesn't do anything to the validity of the
    finished index, but by pretending to qsort() that there are no really
    equal keys in the sort, we can avoid performance problems with qsort
    implementations that have trouble with large numbers of equal keys.
    Patch from Manfred Koizar.