Documentation cleanup for the possible values of the datatype 'boolean'.

diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index bc1ec3f82179b70a56bd95b0628d9c05bacd948e..ab8eb2d30bb8c3c72036c14f4752ea12f724fa1b 100644 (file)
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -2784,9 +2784,9 @@ P  years-months-days <
     PostgreSQL provides the
     standard SQL type boolean;
     see .
-    The boolean type can have one of only two states:
-    true or false.  A third state,
-    unknown, is represented by the
+    The boolean type can have several states:
+    true, false, and a third state,
+    unknown, which is represented by the
     SQL null value.