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1 | | -<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.420 2008/02/26 15:32:30 petere Exp $ --> |
| 1 | +<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.421 2008/03/03 17:11:13 momjian Exp $ --> |
2 | 2 |
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3 | 3 | <chapter id="functions"> |
4 | 4 | <title>Functions and Operators</title> |
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1340 | 1340 | Character with the given code. For <acronym>UTF8</acronym> the |
1341 | 1341 | argument is treated as a Unicode code point. For other multibyte |
1342 | 1342 | encodings the argument must designate a strictly |
1343 | | - <acronym>ASCII</acronym> character. |
| 1343 | + <acronym>ASCII</acronym> character. The NULL (0) character is not |
| 1344 | + allowed because text data types cannot reliably store such bytes. |
1344 | 1345 | </entry> |
1345 | 1346 | <entry><literal>chr(65)</literal></entry> |
1346 | 1347 | <entry><literal>A</literal></entry> |
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