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Document that chr(0) is not supported, and why.

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This commit is contained in:
Bruce Momjian 2008-03-03 17:11:23 +00:00
parent 8a7c17d0ee
commit 5f2ad57f4e
1 changed files with 3 additions and 2 deletions
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doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.419 2007/12/21 03:37:18 tgl Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.419.2.1 2008/03/03 17:11:23 momjian Exp $ -->
<chapter id="functions"> <chapter id="functions">
<title>Functions and Operators</title> <title>Functions and Operators</title>
@ -1340,7 +1340,8 @@
Character with the given code. For <acronym>UTF8</acronym> the Character with the given code. For <acronym>UTF8</acronym> the
argument is treated as a Unicode code point. For other multibyte argument is treated as a Unicode code point. For other multibyte
encodings the argument must designate a strictly encodings the argument must designate a strictly
<acronym>ASCII</acronym> character. <acronym>ASCII</acronym> character. The NULL (0) character is not
allowed because text data types cannot reliably store such bytes.
</entry> </entry>
<entry><literal>chr(65)</literal></entry> <entry><literal>chr(65)</literal></entry>
<entry><literal>A</literal></entry> <entry><literal>A</literal></entry>