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Surrogate pair support for U& string and identifier syntax

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This is mainly to make the functionality consistent with the proposed \u
escape syntax.
This commit is contained in:
Peter Eisentraut
2009-09-21 22:22:07 +00:00
parent c6bc0feb00
commit 02faeb4ac8
2 changed files with 81 additions and 6 deletions
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10
doc/src/sgml/syntax.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/syntax.sgml,v 1.134 2009/08/27 20:08:02 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/syntax.sgml,v 1.135 2009/09/21 22:22:07 petere Exp $ -->
<chapter id="sql-syntax">
<title>SQL Syntax</title>
@ -238,6 +238,10 @@ U&amp;"d!0061t!+000061" UESCAPE '!'
The Unicode escape syntax works only when the server encoding is
UTF8. When other server encodings are used, only code points in
the ASCII range (up to <literal>\007F</literal>) can be specified.
Both the 4-digit and the 6-digit form can be used to specify
UTF-16 surrogate pairs to compose characters with code points
larger than <literal>\FFFF</literal> (although the availability of
the 6-digit form technically makes this unnecessary).
</para>
<para>
@ -497,6 +501,10 @@ U&amp;'d!0061t!+000061' UESCAPE '!'
UTF8. When other server encodings are used, only code points in
the ASCII range (up to <literal>\007F</literal>) can be
specified.
Both the 4-digit and the 6-digit form can be used to specify
UTF-16 surrogate pairs to compose characters with code points
larger than <literal>\FFFF</literal> (although the availability
of the 6-digit form technically makes this unnecessary).
</para>
<para>