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1 | | -<!-- $Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.43 2000/12/16 19:33:23 tgl Exp $ --> |
| 1 | +<!-- $Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.44 2000/12/17 05:55:26 tgl Exp $ --> |
2 | 2 |
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3 | 3 | <chapter id="functions"> |
4 | 4 | <title>Functions and Operators</title> |
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770 | 770 |
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771 | 771 | <para> |
772 | 772 | There are two separate approaches to pattern matching provided by |
773 | | - <productname>Postgres</productname>: The <acronym>SQL</acronym> |
| 773 | + <productname>Postgres</productname>: the <acronym>SQL</acronym> |
774 | 774 | <function>LIKE</function> operator and |
775 | 775 | <acronym>POSIX</acronym>-style regular expressions. |
776 | 776 | </para> |
@@ -2562,8 +2562,9 @@ END |
2562 | 2562 | </informalexample> |
2563 | 2563 |
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2564 | 2564 | <para> |
2565 | | - The data types of all possible <replaceable>result</replaceable> |
2566 | | - expressions must match. |
| 2565 | + The data types of all the <replaceable>result</replaceable> |
| 2566 | + expressions must be coercible to a single output type. |
| 2567 | + See <xref linkend="typeconv-union-case"> for more detail. |
2567 | 2568 | </para> |
2568 | 2569 |
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2569 | 2570 | <synopsis> |
|