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Commitf862c42

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Use dollar-quoting for function bodies, unless disabled with
--disable-dollar-quoting.Andrew Dunstan
1 parent48b2802 commitf862c42

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4 files changed

+121
-28
lines changed

4 files changed

+121
-28
lines changed

‎doc/src/sgml/ref/pg_dump.sgml‎

Lines changed: 31 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
<!--
2-
$PostgreSQL: pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.68 2003/12/01 22:07:58 momjian Exp $
2+
$PostgreSQL: pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.69 2004/03/23 22:06:08 tgl Exp $
33
PostgreSQL documentation
44
-->
55

@@ -420,36 +420,34 @@ PostgreSQL documentation
420420
</varlistentry>
421421

422422
<varlistentry>
423-
<term><option>-Xuse-set-session-authorization</></term>
424-
<term><option>--use-set-session-authorization</></term>
423+
<term><option>-Xdisable-dollar-quoting</></term>
424+
<term><option>--disable-dollar-quoting</></term>
425425
<listitem>
426426
<para>
427-
This option is obsolete but still accepted for backwards
428-
compatibility.
429-
<application>pg_dump</application> now always behaves in the
430-
way formerly selected by this option.
427+
This option disables the use of dollar quoting for function bodies,
428+
and forces them to be quoted using SQL standard string syntax.
431429
</para>
432-
</listitem>
433-
</varlistentry>
430+
</listitem>
431+
</varlistentry>
434432

435433
<varlistentry>
436434
<term><option>-X disable-triggers</></term>
437435
<term><option>--disable-triggers</></term>
438436
<listitem>
439437
<para>
440438
This option is only relevant when creating a data-only dump.
441-
It instructs <application>pg_dump</application> to include commands
442-
to temporarily disable triggers on the target tables while
443-
the data is reloaded. Use this if you have referential
444-
integrity checks or other triggers on the tables that you
445-
do not want to invoke during data reload.
439+
It instructs <application>pg_dump</application> to include commands
440+
to temporarily disable triggers on the target tables while
441+
the data is reloaded. Use this if you have referential
442+
integrity checks or other triggers on the tables that you
443+
do not want to invoke during data reload.
446444
</para>
447445

448446
<para>
449447
Presently, the commands emitted for <option>--disable-triggers</>
450-
must be done as superuser. So, you should also specify
451-
a superuser name with <option>-S</>, or preferably be careful to
452-
start the resulting script as a superuser.
448+
must be done as superuser. So, you should also specify
449+
a superuser name with <option>-S</>, or preferably be careful to
450+
start the resulting script as a superuser.
453451
</para>
454452

455453
<para>
@@ -460,14 +458,27 @@ PostgreSQL documentation
460458
</listitem>
461459
</varlistentry>
462460

461+
<varlistentry>
462+
<term><option>-X use-set-session-authorization</></term>
463+
<term><option>--use-set-session-authorization</></term>
464+
<listitem>
465+
<para>
466+
This option is obsolete but still accepted for backwards
467+
compatibility.
468+
<application>pg_dump</application> now always behaves in the
469+
way formerly selected by this option.
470+
</para>
471+
</listitem>
472+
</varlistentry>
473+
463474
<varlistentry>
464475
<term><option>-Z <replaceable class="parameter">0..9</replaceable></option></term>
465476
<term><option>--compress=<replaceable class="parameter">0..9</replaceable></option></term>
466477
<listitem>
467478
<para>
468-
Specify the compression level to use in archive formats that
469-
support compression. (Currently only the custom archive
470-
format supports compression.)
479+
Specify the compression level to use in archive formats that
480+
support compression. (Currently only the custom archive
481+
format supports compression.)
471482
</para>
472483
</listitem>
473484
</varlistentry>

‎src/bin/pg_dump/dumputils.c‎

Lines changed: 60 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.c,v 1.11 2004/01/07 00:44:21 tgl Exp $
10+
* $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.c,v 1.12 2004/03/23 22:06:08 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -142,6 +142,65 @@ appendStringLiteral(PQExpBuffer buf, const char *str, bool escapeAll)
142142
}
143143

144144

145+
/*
146+
* Convert a string value to a dollar quoted literal and append it to
147+
* the given buffer. If the dqprefix parameter is not NULL then the
148+
* dollar quote delimiter will begin with that (after the opening $).
149+
*
150+
* No escaping is done at all on str, in compliance with the rules
151+
* for parsing dollar quoted strings.
152+
*/
153+
void
154+
appendStringLiteralDQ(PQExpBufferbuf,constchar*str,constchar*dqprefix)
155+
{
156+
staticconstcharsuffixes[]="_XXXXXXX";
157+
intnextchar=0;
158+
PQExpBufferdelimBuf=createPQExpBuffer();
159+
160+
/* start with $ + dqprefix if not NULL */
161+
appendPQExpBufferChar(delimBuf,'$');
162+
if (dqprefix)
163+
appendPQExpBuffer(delimBuf,dqprefix);
164+
165+
/*
166+
* Make sure we choose a delimiter which (without the trailing $)
167+
* is not present in the string being quoted. We don't check with the
168+
* trailing $ because a string ending in $foo must not be quoted with
169+
* $foo$.
170+
*/
171+
while (strstr(str,delimBuf->data)!=NULL)
172+
{
173+
appendPQExpBufferChar(delimBuf,suffixes[nextchar++]);
174+
nextchar %=sizeof(suffixes)-1;
175+
}
176+
177+
/* add trailing $ */
178+
appendPQExpBufferChar(delimBuf,'$');
179+
180+
/* quote it and we are all done */
181+
appendPQExpBufferStr(buf,delimBuf->data);
182+
appendPQExpBufferStr(buf,str);
183+
appendPQExpBufferStr(buf,delimBuf->data);
184+
185+
destroyPQExpBuffer(delimBuf);
186+
}
187+
188+
189+
/*
190+
* Use dollar quoting if the string to be quoted contains ' or \,
191+
* otherwise use standard quoting.
192+
*/
193+
void
194+
appendStringLiteralDQOpt(PQExpBufferbuf,constchar*str,
195+
boolescapeAll,constchar*dqprefix)
196+
{
197+
if (strchr(str,'\'')==NULL&&strchr(str,'\\')==NULL)
198+
appendStringLiteral(buf,str,escapeAll);
199+
else
200+
appendStringLiteralDQ(buf,str,dqprefix);
201+
}
202+
203+
145204
/*
146205
* Convert backend's version string into a number.
147206
*/

‎src/bin/pg_dump/dumputils.h‎

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.h,v 1.10 2004/01/07 00:44:21 tgl Exp $
10+
* $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.h,v 1.11 2004/03/23 22:06:08 tgl Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -21,6 +21,10 @@
2121
externconstchar*fmtId(constchar*identifier);
2222
externvoidappendStringLiteral(PQExpBufferbuf,constchar*str,
2323
boolescapeAll);
24+
externvoidappendStringLiteralDQ(PQExpBufferbuf,constchar*str,
25+
constchar*dqprefix);
26+
externvoidappendStringLiteralDQOpt(PQExpBufferbuf,constchar*str,
27+
boolescapeAll,constchar*dqprefix);
2428
externintparse_version(constchar*versionString);
2529
externboolparsePGArray(constchar*atext,char***itemarray,int*nitems);
2630
externboolbuildACLCommands(constchar*name,constchar*type,

‎src/bin/pg_dump/pg_dump.c‎

Lines changed: 25 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -12,7 +12,7 @@
1212
*by PostgreSQL
1313
*
1414
* IDENTIFICATION
15-
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.c,v 1.368 2004/03/20 20:09:45 tgl Exp $
15+
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dump.c,v 1.369 2004/03/23 22:06:08 tgl Exp $
1616
*
1717
*-------------------------------------------------------------------------
1818
*/
@@ -107,6 +107,9 @@ static const CatalogId nilCatalogId = { 0, 0 };
107107
staticNamespaceInfo*g_namespaces;
108108
staticintg_numNamespaces;
109109

110+
/* flag to turn on/off dollar quoting */
111+
staticintdisable_dollar_quoting=0;
112+
110113

111114
staticvoidhelp(constchar*progname);
112115
staticNamespaceInfo*findNamespace(Oidnsoid,Oidobjoid);
@@ -231,8 +234,9 @@ main(int argc, char **argv)
231234
* the following options don't have an equivalent short option
232235
* letter, but are available as '-X long-name'
233236
*/
234-
{"use-set-session-authorization",no_argument,&use_setsessauth,1},
237+
{"disable-dollar-quoting",no_argument,&disable_dollar_quoting,1},
235238
{"disable-triggers",no_argument,&disable_triggers,1},
239+
{"use-set-session-authorization",no_argument,&use_setsessauth,1},
236240

237241
{NULL,0,NULL,0}
238242
};
@@ -385,10 +389,12 @@ main(int argc, char **argv)
385389
* require arguments should use '-X feature=foo'.
386390
*/
387391
case'X':
388-
if (strcmp(optarg,"use-set-session-authorization")==0)
389-
/* no-op, still allowed for compatibility */;
392+
if (strcmp(optarg,"disable-dollar-quoting")==0)
393+
disable_dollar_quoting=1;
390394
elseif (strcmp(optarg,"disable-triggers")==0)
391395
disable_triggers=1;
396+
elseif (strcmp(optarg,"use-set-session-authorization")==0)
397+
/* no-op, still allowed for compatibility */ ;
392398
else
393399
{
394400
fprintf(stderr,
@@ -679,6 +685,8 @@ help(const char *progname)
679685
" plain text format\n"));
680686
printf(_(" -t, --table=TABLE dump the named table only\n"));
681687
printf(_(" -x, --no-privileges do not dump privileges (grant/revoke)\n"));
688+
printf(_(" -X disable-dollar-quoting, --disable-dollar-quoting\n"
689+
" disable dollar quoting, use SQL standard quoting\n"));
682690
printf(_(" -X disable-triggers, --disable-triggers\n"
683691
" disable triggers during data-only restore\n"));
684692

@@ -5076,15 +5084,26 @@ dumpFunc(Archive *fout, FuncInfo *finfo)
50765084
if (strcmp(prosrc,"-")!=0)
50775085
{
50785086
appendPQExpBuffer(asPart,", ");
5079-
appendStringLiteral(asPart,prosrc, false);
5087+
/*
5088+
* where we have bin, use dollar quoting if allowed and src
5089+
* contains quote or backslash; else use regular quoting.
5090+
*/
5091+
if (disable_dollar_quoting)
5092+
appendStringLiteral(asPart,prosrc, false);
5093+
else
5094+
appendStringLiteralDQOpt(asPart,prosrc, false,NULL);
50805095
}
50815096
}
50825097
else
50835098
{
50845099
if (strcmp(prosrc,"-")!=0)
50855100
{
50865101
appendPQExpBuffer(asPart,"AS ");
5087-
appendStringLiteral(asPart,prosrc, false);
5102+
/* with no bin, dollar quote src unconditionally if allowed */
5103+
if (disable_dollar_quoting)
5104+
appendStringLiteral(asPart,prosrc, false);
5105+
else
5106+
appendStringLiteralDQ(asPart,prosrc,NULL);
50885107
}
50895108
}
50905109

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