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-rw-r--r--doc/src/sgml/ref/create_cast.sgml5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/create_cast.sgml b/doc/src/sgml/ref/create_cast.sgml
index 964cbf4d41a..29ea298a468 100644
--- a/doc/src/sgml/ref/create_cast.sgml
+++ b/doc/src/sgml/ref/create_cast.sgml
@@ -288,6 +288,11 @@ SELECT CAST ( 2 AS numeric ) + 4.0;
convert between data types and a second to apply the modifier.
</para>
+ <para>
+ A cast to or from a domain type currently has no effect. Casting
+ to or from a domain uses the casts associated with its underlying type.
+ </para>
+
</refsect1>
<refsect1 id="sql-createcast-notes">