Index: doc/src/sgml/typeconv.sgml
===================================================================
RCS file: /cvsroot/pgsql-server/doc/src/sgml/typeconv.sgml,v
retrieving revision 1.39
diff -c -c -r1.39 typeconv.sgml
*** doc/src/sgml/typeconv.sgml	29 Nov 2003 19:51:38 -0000	1.39
--- doc/src/sgml/typeconv.sgml	1 Dec 2003 21:42:04 -0000
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*** 437,466 ****
  ERROR:  "-4.5e500" is out of range for type double precision
  </screen>
  </para>
- 
- <para>
- On the other hand, the postfix operator <literal>!</> (factorial)
- is defined only for integer data types, not for <type>float8</type>.  So, if we
- try a similar case with <literal>!</>, we get:
- <screen>
- SELECT '20' ! AS "factorial";
- 
- ERROR:  operator is not unique: "unknown" !
- HINT:  Could not choose a best candidate operator. You may need to add explicit
- type casts.
- </screen>
- This happens because the system can't decide which of the several
- possible <literal>!</> operators should be preferred.  We can help
- it out with an explicit cast:
- <screen>
- SELECT CAST('20' AS int8) ! AS "factorial";
- 
-       factorial
- ---------------------
-  2432902008176640000
- (1 row)
- </screen>
- </para>
  </example>
  
  </sect1>
--- 437,442 ----