Fix documentation of to_char/to_timestamp TZ, tz, OF formatting patterns.

These are only supported in to_char, not in the other direction, but the
documentation failed to mention that.  Also, describe TZ/tz as printing the
time zone "abbreviation", not "name", because what they print is elsewhere
referred to that way.  Per bug #14558.

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index d7738b18b7a8bed4c2ec2b52ff1fea8183b9e35d..1c8202c257ce9cc8225a4cfc0291c3a2014ebad6 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -6062,15 +6062,18 @@ SELECT regexp_match('abc01234xyz', '(?:(.*?)(\d+)(.*)){1,1}');
        
        
         TZ
-        upper case time-zone name
+        upper case time-zone abbreviation
+         (only supported in to_char)
        
        
         tz
-        lower case time-zone name
+        lower case time-zone abbreviation
+         (only supported in to_char)
        
        
         OF
-        time-zone offset
+        time-zone offset from UTC
+         (only supported in to_char)