database/postgres
database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-05-09 18:21:05 +03:00
Code

Restore proper behavior for escaped quotes and for escaped literals

Browse Source 
like newline inside quoted strings.
This commit is contained in:
Thomas G. Lockhart 1997-09-24 17:48:25 +00:00
parent c7dbd366ba
commit 53ad0aa262
1 changed files with 20 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
src/backend/parser/scan.l
View File

@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.21 1997/09/13 03:12:55 thomas Exp $ * $Header: /cvsroot/pgsql/src/backend/parser/scan.l,v 1.22 1997/09/24 17:48:25 thomas Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -91,8 +91,9 @@ quote '
xqstart {quote} xqstart {quote}
xqstop {quote} xqstop {quote}
xqdouble {quote}{quote} xqdouble {quote}{quote}
xqinside [^\']* xqinside [^\\']*
xqliteral [\\]. xqembedded "\\'"
xqliteral [\\](.|\n)
xcline [\/][\*].*[\*][\/]{space}*\n* xcline [\/][\*].*[\*][\/]{space}*\n*
xcstart [\/][\*]{op_and_self}* xcstart [\/][\*]{op_and_self}*
@ -132,6 +133,14 @@ other .
/* DO NOT PUT ANY COMMENTS IN THE FOLLOWING SECTION. /* DO NOT PUT ANY COMMENTS IN THE FOLLOWING SECTION.
* AT&T lex does not properly handle C-style comments in this second lex block. * AT&T lex does not properly handle C-style comments in this second lex block.
* So, put comments here. tgl - 1997-09-08 * So, put comments here. tgl - 1997-09-08
*
* Quoted strings must allow some special characters such as single-quote
* and newline.
* Embedded single-quotes are implemented both in the SQL/92-standard
* style of two adjacent single quotes "''" and in the Postgres/Java style
* of escaped-quote "\'".
* Other embedded escaped characters are matched explicitly and the leading
* backslash is dropped from the string. - thomas 1997-09-24
*/ */
%% %%
@ -163,6 +172,14 @@ other .
memcpy(literal+llen, yytext, yyleng+1); memcpy(literal+llen, yytext, yyleng+1);
llen += yyleng; llen += yyleng;
} }
<xq>{xqembedded} {
if ((llen+yyleng-1) > (MAX_PARSE_BUFFER - 1))
elog(WARN,"quoted string parse buffer of %d chars exceeded",MAX_PARSE_BUFFER);
memcpy(literal+llen, yytext, yyleng+1);
*(literal+llen) = '\'';
llen += yyleng;
}
<xq>{xqliteral} { <xq>{xqliteral} {
if ((llen+yyleng-1) > (MAX_PARSE_BUFFER - 1)) if ((llen+yyleng-1) > (MAX_PARSE_BUFFER - 1))
elog(WARN,"quoted string parse buffer of %d chars exceeded",MAX_PARSE_BUFFER); elog(WARN,"quoted string parse buffer of %d chars exceeded",MAX_PARSE_BUFFER);