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Wording cleanup for error messages. Also change can't -> cannot.
Standard English uses "may", "can", and "might" in different ways: may - permission, "You may borrow my rake." can - ability, "I can lift that log." might - possibility, "It might rain today." Unfortunately, in conversational English, their use is often mixed, as in, "You may use this variable to do X", when in fact, "can" is a better choice. Similarly, "It may crash" is better stated, "It might crash".
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@ -1,5 +1,5 @@
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<!--
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$PostgreSQL: pgsql/doc/src/sgml/ref/create_function.sgml,v 1.72 2007/01/31 23:26:03 momjian Exp $
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$PostgreSQL: pgsql/doc/src/sgml/ref/create_function.sgml,v 1.73 2007/02/01 19:10:24 momjian Exp $
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-->
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<refentry id="SQL-CREATEFUNCTION">
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@ -61,7 +61,7 @@ CREATE [ OR REPLACE ] FUNCTION
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Also, <command>CREATE OR REPLACE FUNCTION</command> will not let
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you change the return type of an existing function. To do that,
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you must drop and recreate the function. (When using <literal>OUT</>
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parameters, that means you can't change the names or types of any
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parameters, that means you cannot change the names or types of any
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<literal>OUT</> parameters except by dropping the function.)
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</para>
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