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Document use of partial indexes for partial unique constraints

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Report by Tomáš Greif

Backpatch through 9.4
This commit is contained in:
Bruce Momjian 2014-09-03 14:34:46 -04:00
parent 6ea591ed46
commit 646deb603e
1 changed files with 3 additions and 1 deletions
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doc/src/sgml/ddl.sgml
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@ -547,6 +547,8 @@ 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.
A uniqueness constraint on only some rows can be enforced by creating
a <link linkend="indexes-partial">partial index</link>.
</para>
<indexterm>