docs: improve 'capitals' inheritance example
authorBruce Momjian
Mon, 31 Aug 2020 17:43:04 +0000 (13:43 -0400)
committerBruce Momjian
Mon, 31 Aug 2020 17:43:04 +0000 (13:43 -0400)
commitac736e43aa70dfb3da99e8d12349b801229aa2bc
tree79ae0f85957cfa382a1c04cbaa8a9e70f4f20a42
parent5277f493dde7de00250d33a8ea79a5b93ee89dae
docs:  improve 'capitals' inheritance example

Adds constraints and improves wording.

Reported-by: [email protected]
Discussion: https://postgr.es/m/159586122762.680.1361378513036616007@wrigleys.postgresql.org

Backpatch-through: 9.5
doc/src/sgml/advanced.sgml