From 2b888647d864c5341fd0fb628c3773304282dc1d Mon Sep 17 00:00:00 2001 From: David Rowley Date: Wed, 30 Sep 2020 13:02:08 +1300 Subject: [PATCH] Doc: Improve clarity on partitioned table limitations Explicitly mention that primary key constraints are also included in the limitation that the constraint columns must be a superset of the partition key columns. Wording suggestion from Tom Lane. Discussion: https://postgr.es/m/64062533.78364.1601415362244@mail.yahoo.com Backpatch-through: 11, where unique constraints on partitioned tables were added --- doc/src/sgml/ddl.sgml | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml index e890bdd10ad..9fb2be6674f 100644 --- a/doc/src/sgml/ddl.sgml +++ b/doc/src/sgml/ddl.sgml @@ -4056,8 +4056,8 @@ ALTER INDEX measurement_city_id_logdate_key - Unique constraints on partitioned tables must include all the - partition key columns. This limitation exists because + Unique constraints (and hence primary keys) on partitioned tables must + include all the partition key columns. This limitation exists because PostgreSQL can only enforce uniqueness in each partition individually.