diff options
| -rw-r--r-- | doc/src/sgml/ddl.sgml | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml index 0fcd9f87062..c07f5a203dd 100644 --- a/doc/src/sgml/ddl.sgml +++ b/doc/src/sgml/ddl.sgml @@ -546,7 +546,9 @@ CREATE TABLE products ( <para> Adding a unique constraint will automatically create a unique btree - index on the column or group of columns used in the constraint. + index on the column or group of columns used in the constraint. + A uniqueness constraint on only some rows can be enforced by creating + a <link linkend="indexes-partial">partial index</link>. </para> <indexterm> |