date_trunc also accepts 'quarter'. Noted by Yoshihisa Nakano.

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 9f27778b66703fabccaa46cd53b20de8a441e5ea..239ba711fbffe6d3394ec8abf56300404b783aba 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -5559,6 +5559,7 @@ date_trunc('<replaceable>field</replaceable>', <replaceable>source</replaceable>
      <member><literal>day</literal></member>
      <member><literal>week</literal></member>
      <member><literal>month</literal></member>
+     <member><literal>quarter</literal></member>
      <member><literal>year</literal></member>
      <member><literal>decade</literal></member>
      <member><literal>century</literal></member>