doc: add examples of creative use of unique expression indexes Unique expression indexes can constrain data in creative ways, so show two examples.
Reported-by: Tuomas Leikola Discussion: https://postgr.es/m/[email protected] Backpatch-through: 9.4 Branch ------ REL9_5_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/937cf1b09146ef91195780f747900cf69e8d0fd8 Modified Files -------------- doc/src/sgml/indices.sgml | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
