postgres.git / summary / log / commit / refs

commit    8439ee415f4d8850806a7fb59cc7ce4dbb6ea2ed
Author:   Tom Lane <tgl@sss.pgh.pa.us>
Date:     Thu Feb 13 19:24:49 2014 +0000
First released in: 9.4.0, 8.4.20, 9.0.16, 9.1.12, 9.2.7, 9.3.3

    Fix length checking for Unicode identifiers containing escapes (U&"...").
    
    We used the length of the input string, not the de-escaped string, as
    the trigger for NAMEDATALEN truncation.  AFAICS this would only result
    in sometimes printing a phony truncation warning; but it's just luck
    that there was no worse problem, since we were violating the API spec
    for truncate_identifier().  Per bug #9204 from Joshua Yanovski.
    
    This has been wrong since the Unicode-identifier support was added,
    so back-patch to all supported branches.


 src/backend/parser/scan.l | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/src/backend/parser/scan.l b/src/backend/parser/scan.l
index 6b216b53786..cde8fae620f 100644
--- a/src/backend/parser/scan.l
+++ b/src/backend/parser/scan.l
@@ -697,28 +697,32 @@ other			.
 					return IDENT;
 				}
 <xui>{xuistop1}	{
-					char		   *ident;
+					char	   *ident;
+					int			identlen;
 
 					BEGIN(INITIAL);
 					if (yyextra->literallen == 0)
 						yyerror("zero-length delimited identifier");
 					ident = litbuf_udeescape('\\', yyscanner);
-					if (yyextra->literallen >= NAMEDATALEN)
-						truncate_identifier(ident, yyextra->literallen, true);
+					identlen = strlen(ident);
+					if (identlen >= NAMEDATALEN)
+						truncate_identifier(ident, identlen, true);
 					yylval->str = ident;
 					/* throw back all but the quote */
 					yyless(1);
 					return IDENT;
 				}
 <xui>{xuistop2}	{
-					char		   *ident;
+					char	   *ident;
+					int			identlen;
 
 					BEGIN(INITIAL);
 					if (yyextra->literallen == 0)
 						yyerror("zero-length delimited identifier");
 					ident = litbuf_udeescape(yytext[yyleng - 2], yyscanner);
-					if (yyextra->literallen >= NAMEDATALEN)
-						truncate_identifier(ident, yyextra->literallen, true);
+					identlen = strlen(ident);
+					if (identlen >= NAMEDATALEN)
+						truncate_identifier(ident, identlen, true);
 					yylval->str = ident;
 					return IDENT;
 				}


[parent: 22fce59aaf81]