Index: doc/src/sgml/syntax.sgml
===================================================================
RCS file: /cvsroot/pgsql/doc/src/sgml/syntax.sgml,v
retrieving revision 1.99
diff -c -c -r1.99 syntax.sgml
*** doc/src/sgml/syntax.sgml	23 Dec 2004 05:37:40 -0000	1.99
--- doc/src/sgml/syntax.sgml	28 May 2005 14:02:58 -0000
***************
*** 254,270 ****
  
      <para>
       Another <productname>PostgreSQL</productname> extension is that
!      C-style backslash escapes are available:
!      <literal>\b</literal> is a backspace, <literal>\f</literal> is a
!      form feed, <literal>\n</literal> is a newline,
!      <literal>\r</literal> is a carriage return, <literal>\t</literal>
!      is a tab, and <literal>\<replaceable>xxx</replaceable></literal>,
!      where <replaceable>xxx</replaceable> is an octal number, is a
!      byte with the corresponding code.  (It is your responsibility
!      that the byte sequences you create are valid characters in the
!      server character set encoding.)  Any other character following a
!      backslash is taken literally.  Thus, to include a backslash in a
!      string constant, write two backslashes.
      </para>
  
      <para>
--- 254,271 ----
  
      <para>
       Another <productname>PostgreSQL</productname> extension is that
!      C-style backslash escapes are available: <literal>\b</literal> is a
!      backspace, <literal>\f</literal> is a form feed,
!      <literal>\n</literal> is a newline, <literal>\r</literal> is a
!      carriage return, <literal>\t</literal> is a tab. Also supported is
!      <literal>\<replaceable>digits</replaceable></literal>, where
!      <replaceable>ddd</replaceable> represents an octal byte value, and
!      <literal>\x<replaceable>hexdigits</replaceable></literal>, where
!      <replaceable>hexdigits</replaceable> represents a hexadecimal byte value.
!      (It is your responsibility that the byte sequences you create are
!      valid characters in the server character set encoding.) Any other
!      character following a backslash is taken literally. Thus, to
!      include a backslash in a string constant, write two backslashes.
      </para>
  
      <para>
Index: src/backend/parser/scan.l
===================================================================
RCS file: /cvsroot/pgsql/src/backend/parser/scan.l,v
retrieving revision 1.122
diff -c -c -r1.122 scan.l
*** src/backend/parser/scan.l	26 May 2005 01:24:29 -0000	1.122
--- src/backend/parser/scan.l	28 May 2005 14:03:10 -0000
***************
*** 193,200 ****
  xqstart			{quote}
  xqdouble		{quote}{quote}
  xqinside		[^\\']+
! xqescape		[\\][^0-7]
  xqoctesc		[\\][0-7]{1,3}
  
  /* $foo$ style quotes ("dollar quoting")
   * The quoted string starts with $foo$ where "foo" is an optional string
--- 193,201 ----
  xqstart			{quote}
  xqdouble		{quote}{quote}
  xqinside		[^\\']+
! xqescape		[\\][^0-7x]
  xqoctesc		[\\][0-7]{1,3}
+ xqhexesc		[\\]x[0-9A-Fa-f]{1,2}
  
  /* $foo$ style quotes ("dollar quoting")
   * The quoted string starts with $foo$ where "foo" is an optional string
***************
*** 435,440 ****
--- 436,445 ----
  					unsigned char c = strtoul(yytext+1, NULL, 8);
  					addlitchar(c);
  				}
+ <xq>{xqhexesc}  {
+ 					unsigned char c = strtoul(yytext+2, NULL, 16);
+ 					addlitchar(c);
+ 				}
  <xq>{quotecontinue} {
  					/* ignore */
  				}