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Commit3352c23

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Fix privilege dumping from servers too old to have that type of privilege.
pg_dump produced fairly silly GRANT/REVOKE commands when dumping types frompre-9.2 servers, and when dumping functions or procedural languages frompre-7.3 servers. Those server versions lack the typacl, proacl, and/orlanacl columns respectively, and pg_dump substituted default values thatwere in fact incorrect. We ended up revoking all the owner's ownprivileges for the object while granting all privileges to PUBLIC.Of course the owner would then have those privileges again via PUBLIC, solong as she did not try to revoke PUBLIC's privileges; which may explainthe lack of field reports. Nonetheless this is pretty silly behavior.The stakes were raised by my recent patch to make pg_dump dump shell types,because 9.2 and up pg_dump would proceed to emit bogus GRANT/REVOKEcommands for a shell type if dumping from a pre-9.2 server; and the serverwill not accept GRANT/REVOKE commands for a shell type. (Perhaps itshould, but that's a topic for another day.) So the resulting dump scriptwouldn't load without errors.The right thing to do is to act as though these objects have defaultprivileges (null ACL entries), which causes pg_dump to print noGRANT/REVOKE commands at all for them. That fixes the silly resultsand also dodges the problem with shell types.In passing, modify getProcLangs() to be less creatively different abouthow to handle missing columns when dumping from older server versions.Every other data-acquisition function in pg_dump does that by substitutingappropriate default values in the version-specific SQL commands, and I seeno reason why this one should march to its own drummer. Its use of"SELECT *" was likewise not conformant with anyplace else, not to mentionit's not considered good SQL style for production queries.Back-patch to all supported versions. Although 9.0 and 9.1 pg_dump don'thave the issue with typacl, they are more likely than newer versions to beused to dump from ancient servers, so we ought to fix the proacl/lanaclissues all the way back.
1 parent7e0add3 commit3352c23

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1 file changed

+47
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1 file changed

+47
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‎src/bin/pg_dump/pg_dump.c

Lines changed: 47 additions & 38 deletions
Original file line numberDiff line numberDiff line change
@@ -3268,7 +3268,7 @@ getTypes(Archive *fout, int *numTypes)
32683268
elseif (fout->remoteVersion >=80300)
32693269
{
32703270
appendPQExpBuffer(query,"SELECT tableoid, oid, typname, "
3271-
"typnamespace,'{=U}' AS typacl, "
3271+
"typnamespace,NULL AS typacl, "
32723272
"(%s typowner) AS rolname, "
32733273
"typinput::oid AS typinput, "
32743274
"typoutput::oid AS typoutput, typelem, typrelid, "
@@ -3283,7 +3283,7 @@ getTypes(Archive *fout, int *numTypes)
32833283
elseif (fout->remoteVersion >=70300)
32843284
{
32853285
appendPQExpBuffer(query,"SELECT tableoid, oid, typname, "
3286-
"typnamespace,'{=U}' AS typacl, "
3286+
"typnamespace,NULL AS typacl, "
32873287
"(%s typowner) AS rolname, "
32883288
"typinput::oid AS typinput, "
32893289
"typoutput::oid AS typoutput, typelem, typrelid, "
@@ -3297,7 +3297,7 @@ getTypes(Archive *fout, int *numTypes)
32973297
elseif (fout->remoteVersion >=70100)
32983298
{
32993299
appendPQExpBuffer(query,"SELECT tableoid, oid, typname, "
3300-
"0::oid AS typnamespace,'{=U}' AS typacl, "
3300+
"0::oid AS typnamespace,NULL AS typacl, "
33013301
"(%s typowner) AS rolname, "
33023302
"typinput::oid AS typinput, "
33033303
"typoutput::oid AS typoutput, typelem, typrelid, "
@@ -3313,7 +3313,7 @@ getTypes(Archive *fout, int *numTypes)
33133313
appendPQExpBuffer(query,"SELECT "
33143314
"(SELECT oid FROM pg_class WHERE relname = 'pg_type') AS tableoid, "
33153315
"oid, typname, "
3316-
"0::oid AS typnamespace,'{=U}' AS typacl, "
3316+
"0::oid AS typnamespace,NULL AS typacl, "
33173317
"(%s typowner) AS rolname, "
33183318
"typinput::oid AS typinput, "
33193319
"typoutput::oid AS typoutput, typelem, typrelid, "
@@ -4004,7 +4004,7 @@ getAggregates(Archive *fout, int *numAggs)
40044004
"CASE WHEN aggbasetype = 0 THEN 0 ELSE 1 END AS pronargs, "
40054005
"aggbasetype AS proargtypes, "
40064006
"(%s aggowner) AS rolname, "
4007-
"'{=X}' AS aggacl "
4007+
"NULL AS aggacl "
40084008
"FROM pg_aggregate "
40094009
"where oid > '%u'::oid",
40104010
username_subquery,
@@ -4019,7 +4019,7 @@ getAggregates(Archive *fout, int *numAggs)
40194019
"CASE WHEN aggbasetype = 0 THEN 0 ELSE 1 END AS pronargs, "
40204020
"aggbasetype AS proargtypes, "
40214021
"(%s aggowner) AS rolname, "
4022-
"'{=X}' AS aggacl "
4022+
"NULL AS aggacl "
40234023
"FROM pg_aggregate "
40244024
"where oid > '%u'::oid",
40254025
username_subquery,
@@ -4163,7 +4163,7 @@ getFuncs(Archive *fout, int *numFuncs)
41634163
appendPQExpBuffer(query,
41644164
"SELECT tableoid, oid, proname, prolang, "
41654165
"pronargs, proargtypes, prorettype, "
4166-
"'{=X}' AS proacl, "
4166+
"NULL AS proacl, "
41674167
"0::oid AS pronamespace, "
41684168
"(%s proowner) AS rolname "
41694169
"FROM pg_proc "
@@ -4179,7 +4179,7 @@ getFuncs(Archive *fout, int *numFuncs)
41794179
" WHERE relname = 'pg_proc') AS tableoid, "
41804180
"oid, proname, prolang, "
41814181
"pronargs, proargtypes, prorettype, "
4182-
"'{=X}' AS proacl, "
4182+
"NULL AS proacl, "
41834183
"0::oid AS pronamespace, "
41844184
"(%s proowner) AS rolname "
41854185
"FROM pg_proc "
@@ -6014,7 +6014,7 @@ getProcLangs(Archive *fout, int *numProcLangs)
60146014
/* pg_language has a laninline column */
60156015
appendPQExpBuffer(query,"SELECT tableoid, oid, "
60166016
"lanname, lanpltrusted, lanplcallfoid, "
6017-
"laninline, lanvalidator,lanacl, "
6017+
"laninline, lanvalidator, lanacl, "
60186018
"(%s lanowner) AS lanowner "
60196019
"FROM pg_language "
60206020
"WHERE lanispl "
@@ -6026,7 +6026,7 @@ getProcLangs(Archive *fout, int *numProcLangs)
60266026
/* pg_language has a lanowner column */
60276027
appendPQExpBuffer(query,"SELECT tableoid, oid, "
60286028
"lanname, lanpltrusted, lanplcallfoid, "
6029-
"lanvalidator, lanacl, "
6029+
"0 AS laninline, lanvalidator, lanacl, "
60306030
"(%s lanowner) AS lanowner "
60316031
"FROM pg_language "
60326032
"WHERE lanispl "
@@ -6036,7 +6036,9 @@ getProcLangs(Archive *fout, int *numProcLangs)
60366036
elseif (fout->remoteVersion >=80100)
60376037
{
60386038
/* Languages are owned by the bootstrap superuser, OID 10 */
6039-
appendPQExpBuffer(query,"SELECT tableoid, oid, *, "
6039+
appendPQExpBuffer(query,"SELECT tableoid, oid, "
6040+
"lanname, lanpltrusted, lanplcallfoid, "
6041+
"0 AS laninline, lanvalidator, lanacl, "
60406042
"(%s '10') AS lanowner "
60416043
"FROM pg_language "
60426044
"WHERE lanispl "
@@ -6046,27 +6048,47 @@ getProcLangs(Archive *fout, int *numProcLangs)
60466048
elseif (fout->remoteVersion >=70400)
60476049
{
60486050
/* Languages are owned by the bootstrap superuser, sysid 1 */
6049-
appendPQExpBuffer(query,"SELECT tableoid, oid, *, "
6051+
appendPQExpBuffer(query,"SELECT tableoid, oid, "
6052+
"lanname, lanpltrusted, lanplcallfoid, "
6053+
"0 AS laninline, lanvalidator, lanacl, "
60506054
"(%s '1') AS lanowner "
60516055
"FROM pg_language "
60526056
"WHERE lanispl "
60536057
"ORDER BY oid",
60546058
username_subquery);
60556059
}
6056-
elseif (fout->remoteVersion >=70100)
6060+
elseif (fout->remoteVersion >=70300)
60576061
{
60586062
/* No clear notion of an owner at all before 7.4 ... */
6059-
appendPQExpBufferStr(query,"SELECT tableoid, oid, * FROM pg_language "
6060-
"WHERE lanispl "
6061-
"ORDER BY oid");
6063+
appendPQExpBuffer(query,"SELECT tableoid, oid, "
6064+
"lanname, lanpltrusted, lanplcallfoid, "
6065+
"0 AS laninline, lanvalidator, lanacl, "
6066+
"NULL AS lanowner "
6067+
"FROM pg_language "
6068+
"WHERE lanispl "
6069+
"ORDER BY oid");
6070+
}
6071+
elseif (fout->remoteVersion >=70100)
6072+
{
6073+
appendPQExpBuffer(query,"SELECT tableoid, oid, "
6074+
"lanname, lanpltrusted, lanplcallfoid, "
6075+
"0 AS laninline, 0 AS lanvalidator, NULL AS lanacl, "
6076+
"NULL AS lanowner "
6077+
"FROM pg_language "
6078+
"WHERE lanispl "
6079+
"ORDER BY oid");
60626080
}
60636081
else
60646082
{
6065-
appendPQExpBufferStr(query,"SELECT "
6066-
"(SELECT oid FROM pg_class WHERE relname = 'pg_language') AS tableoid, "
6067-
"oid, * FROM pg_language "
6068-
"WHERE lanispl "
6069-
"ORDER BY oid");
6083+
appendPQExpBuffer(query,"SELECT "
6084+
"(SELECT oid FROM pg_class WHERE relname = 'pg_language') AS tableoid, "
6085+
"oid, "
6086+
"lanname, lanpltrusted, lanplcallfoid, "
6087+
"0 AS laninline, 0 AS lanvalidator, NULL AS lanacl, "
6088+
"NULL AS lanowner "
6089+
"FROM pg_language "
6090+
"WHERE lanispl "
6091+
"ORDER BY oid");
60706092
}
60716093

60726094
res=ExecuteSqlQuery(fout,query->data,PGRES_TUPLES_OK);
@@ -6082,7 +6104,6 @@ getProcLangs(Archive *fout, int *numProcLangs)
60826104
i_lanname=PQfnumber(res,"lanname");
60836105
i_lanpltrusted=PQfnumber(res,"lanpltrusted");
60846106
i_lanplcallfoid=PQfnumber(res,"lanplcallfoid");
6085-
/* these may fail and return -1: */
60866107
i_laninline=PQfnumber(res,"laninline");
60876108
i_lanvalidator=PQfnumber(res,"lanvalidator");
60886109
i_lanacl=PQfnumber(res,"lanacl");
@@ -6098,22 +6119,10 @@ getProcLangs(Archive *fout, int *numProcLangs)
60986119
planginfo[i].dobj.name=pg_strdup(PQgetvalue(res,i,i_lanname));
60996120
planginfo[i].lanpltrusted=*(PQgetvalue(res,i,i_lanpltrusted))=='t';
61006121
planginfo[i].lanplcallfoid=atooid(PQgetvalue(res,i,i_lanplcallfoid));
6101-
if (i_laninline >=0)
6102-
planginfo[i].laninline=atooid(PQgetvalue(res,i,i_laninline));
6103-
else
6104-
planginfo[i].laninline=InvalidOid;
6105-
if (i_lanvalidator >=0)
6106-
planginfo[i].lanvalidator=atooid(PQgetvalue(res,i,i_lanvalidator));
6107-
else
6108-
planginfo[i].lanvalidator=InvalidOid;
6109-
if (i_lanacl >=0)
6110-
planginfo[i].lanacl=pg_strdup(PQgetvalue(res,i,i_lanacl));
6111-
else
6112-
planginfo[i].lanacl=pg_strdup("{=U}");
6113-
if (i_lanowner >=0)
6114-
planginfo[i].lanowner=pg_strdup(PQgetvalue(res,i,i_lanowner));
6115-
else
6116-
planginfo[i].lanowner=pg_strdup("");
6122+
planginfo[i].laninline=atooid(PQgetvalue(res,i,i_laninline));
6123+
planginfo[i].lanvalidator=atooid(PQgetvalue(res,i,i_lanvalidator));
6124+
planginfo[i].lanacl=pg_strdup(PQgetvalue(res,i,i_lanacl));
6125+
planginfo[i].lanowner=pg_strdup(PQgetvalue(res,i,i_lanowner));
61176126

61186127
if (fout->remoteVersion<70300)
61196128
{

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