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Remove "convert 'blah' using conversion_name" facility, because if it

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produces text it is an encoding hole and if not it's incompatible
with the spec, whatever the spec means (which we're not sure about anyway).
This commit is contained in:
Andrew Dunstan
2007-09-24 01:29:30 +00:00
parent c3b193a5c3
commit 02138357ff
9 changed files with 15 additions and 1046 deletions
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27
doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.397 2007/09/19 03:13:57 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.398 2007/09/24 01:29:27 adunstan Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -1022,9 +1022,6 @@
<indexterm>
<primary>char_length</primary>
</indexterm>
<indexterm>
<primary>convert</primary>
</indexterm>
<indexterm>
<primary>lower</primary>
</indexterm>
@ -1119,22 +1116,6 @@
<entry><literal>4</literal></entry>
</row>
<row>
<entry><literal><function>convert</function>(<parameter>string</parameter>
using <parameter>conversion_name</parameter>)</literal></entry>
<entry><type>bytea</type></entry>
<entry>
Change encoding using specified conversion name. Conversions
can be defined by <command>CREATE CONVERSION</command>. Also
there are some pre-defined conversion names. See <xref
linkend="conversion-names"> for available conversion
names. The <parameter>string</parameter> must be valid in the
source encoding.
</entry>
<entry><literal>convert('PostgreSQL' using iso_8859_1_to_utf8)</literal></entry>
<entry><literal>'PostgreSQL'</literal> in UTF8 (Unicode, 8-bit) encoding</entry>
</row>
<row>
<entry><literal><function>lower</function>(<parameter>string</parameter>)</literal></entry>
<entry><type>text</type></entry>
@ -1245,6 +1226,9 @@
<indexterm>
<primary>chr</primary>
</indexterm>
<indexterm>
<primary>convert</primary>
</indexterm>
<indexterm>
<primary>convert_from</primary>
</indexterm>
@ -1374,6 +1358,9 @@
original encoding is specified by
<parameter>src_encoding</parameter>. The
<parameter>string</parameter> must be valid in this encoding.
Conversions can be defined by <command>CREATE CONVERSION</command>.
Also there are some pre-defined conversions. See <xref
linkend="conversion-names"> for available conversions.
</entry>
<entry><literal>convert( 'text_in_utf8', 'UTF8', 'LATIN1')</literal></entry>
<entry><literal>text_in_utf8</literal> represented in ISO 8859-1 encoding</entry>

6
doc/src/sgml/ref/create_conversion.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/ref/create_conversion.sgml,v 1.19 2007/01/31 23:26:03 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/ref/create_conversion.sgml,v 1.20 2007/09/24 01:29:28 adunstan Exp $ -->
<refentry id="SQL-CREATECONVERSION">
<refmeta>
@ -27,9 +27,7 @@ CREATE [ DEFAULT ] CONVERSION <replaceable>name</replaceable>
<para>
<command>CREATE CONVERSION</command> defines a new conversion between
character set encodings. Conversion names can be used in the
<function>convert</function> function
to specify a particular encoding conversion. Also, conversions that
character set encodings. Also, conversions that
are marked <literal>DEFAULT</> can be used for automatic encoding
conversion between
client and server. For this purpose, two conversions, from encoding A to