On Jun 1, 2017, at 13:44 , Karl Czajkowski <karlcz@isi.edu> wrote:
If I remember correctly, isn't a compound index always just using
btree? In general, I have found better luck using several smaller btree indices than one large compound one. Unless your entire query can be answered from an index-only lookup, the extra columns just bloat the btree index.
The issue is *much* more subtle than this. For repetitive queries, a compound index can be a great speedup.