LCOV - code coverage report
Current view: top level - src/backend/catalog - pg_shdepend.c (source / functions) Coverage Total Hit
Test: PostgreSQL 20devel Lines: 82.5 % 509 420
Test Date: 2026-11-12 23:16:15 Functions: 100.0 % 24 24
Legend: Lines:     hit not hit
Branches: + taken - not taken # not executed
Branches: 67.3 % 275 185

             Branch data     Line data    Source code
       1                 :             : /*-------------------------------------------------------------------------
       2                 :             :  *
       3                 :             :  * pg_shdepend.c
       4                 :             :  *    routines to support manipulation of the pg_shdepend relation
       5                 :             :  *
       6                 :             :  * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
       7                 :             :  * Portions Copyright (c) 1994, Regents of the University of California
       8                 :             :  *
       9                 :             :  *
      10                 :             :  * IDENTIFICATION
      11                 :             :  *    src/backend/catalog/pg_shdepend.c
      12                 :             :  *
      13                 :             :  *-------------------------------------------------------------------------
      14                 :             :  */
      15                 :             : #include "postgres.h"
      16                 :             : 
      17                 :             : #include "access/genam.h"
      18                 :             : #include "access/htup_details.h"
      19                 :             : #include "access/table.h"
      20                 :             : #include "access/xact.h"
      21                 :             : #include "catalog/catalog.h"
      22                 :             : #include "catalog/dependency.h"
      23                 :             : #include "catalog/indexing.h"
      24                 :             : #include "catalog/pg_authid.h"
      25                 :             : #include "catalog/pg_auth_members.h"
      26                 :             : #include "catalog/pg_collation.h"
      27                 :             : #include "catalog/pg_conversion.h"
      28                 :             : #include "catalog/pg_database.h"
      29                 :             : #include "catalog/pg_default_acl.h"
      30                 :             : #include "catalog/pg_event_trigger.h"
      31                 :             : #include "catalog/pg_extension.h"
      32                 :             : #include "catalog/pg_foreign_data_wrapper.h"
      33                 :             : #include "catalog/pg_foreign_server.h"
      34                 :             : #include "catalog/pg_language.h"
      35                 :             : #include "catalog/pg_largeobject.h"
      36                 :             : #include "catalog/pg_namespace.h"
      37                 :             : #include "catalog/pg_opclass.h"
      38                 :             : #include "catalog/pg_operator.h"
      39                 :             : #include "catalog/pg_opfamily.h"
      40                 :             : #include "catalog/pg_proc.h"
      41                 :             : #include "catalog/pg_shdepend.h"
      42                 :             : #include "catalog/pg_statistic_ext.h"
      43                 :             : #include "catalog/pg_subscription.h"
      44                 :             : #include "catalog/pg_tablespace.h"
      45                 :             : #include "catalog/pg_ts_config.h"
      46                 :             : #include "catalog/pg_ts_dict.h"
      47                 :             : #include "catalog/pg_type.h"
      48                 :             : #include "catalog/pg_user_mapping.h"
      49                 :             : #include "commands/alter.h"
      50                 :             : #include "commands/dbcommands.h"
      51                 :             : #include "commands/defrem.h"
      52                 :             : #include "commands/event_trigger.h"
      53                 :             : #include "commands/policy.h"
      54                 :             : #include "commands/publicationcmds.h"
      55                 :             : #include "commands/schemacmds.h"
      56                 :             : #include "commands/subscriptioncmds.h"
      57                 :             : #include "commands/tablecmds.h"
      58                 :             : #include "commands/tablespace.h"
      59                 :             : #include "commands/typecmds.h"
      60                 :             : #include "miscadmin.h"
      61                 :             : #include "storage/lmgr.h"
      62                 :             : #include "utils/acl.h"
      63                 :             : #include "utils/fmgroids.h"
      64                 :             : #include "utils/lsyscache.h"
      65                 :             : #include "utils/memutils.h"
      66                 :             : #include "utils/syscache.h"
      67                 :             : 
      68                 :             : typedef enum
      69                 :             : {
      70                 :             :     LOCAL_OBJECT,
      71                 :             :     SHARED_OBJECT,
      72                 :             :     REMOTE_OBJECT,
      73                 :             : } SharedDependencyObjectType;
      74                 :             : 
      75                 :             : typedef struct
      76                 :             : {
      77                 :             :     ObjectAddress object;
      78                 :             :     char        deptype;
      79                 :             :     SharedDependencyObjectType objtype;
      80                 :             : } ShDependObjectInfo;
      81                 :             : 
      82                 :             : static void getOidListDiff(Oid *list1, int *nlist1, Oid *list2, int *nlist2);
      83                 :             : static Oid  classIdGetDbId(Oid classId);
      84                 :             : static void shdepChangeDep(Relation sdepRel,
      85                 :             :                            Oid classid, Oid objid, int32 objsubid,
      86                 :             :                            Oid refclassid, Oid refobjid,
      87                 :             :                            SharedDependencyType deptype);
      88                 :             : static void updateAclDependenciesWorker(Oid classId, Oid objectId,
      89                 :             :                                         int32 objsubId, Oid ownerId,
      90                 :             :                                         SharedDependencyType deptype,
      91                 :             :                                         int noldmembers, Oid *oldmembers,
      92                 :             :                                         int nnewmembers, Oid *newmembers);
      93                 :             : static void shdepAddDependency(Relation sdepRel,
      94                 :             :                                Oid classId, Oid objectId, int32 objsubId,
      95                 :             :                                Oid refclassId, Oid refobjId,
      96                 :             :                                SharedDependencyType deptype);
      97                 :             : static void shdepDropDependency(Relation sdepRel,
      98                 :             :                                 Oid classId, Oid objectId, int32 objsubId,
      99                 :             :                                 bool drop_subobjects,
     100                 :             :                                 Oid refclassId, Oid refobjId,
     101                 :             :                                 SharedDependencyType deptype);
     102                 :             : static void storeObjectDescription(StringInfo descs,
     103                 :             :                                    SharedDependencyObjectType type,
     104                 :             :                                    ObjectAddress *object,
     105                 :             :                                    SharedDependencyType deptype,
     106                 :             :                                    int count);
     107                 :             : static void shdepReassignOwned_Owner(Form_pg_shdepend sdepForm,
     108                 :             :                                      Oid oldrole, Oid newrole);
     109                 :             : static void shdepReassignOwned_InitAcl(Form_pg_shdepend sdepForm,
     110                 :             :                                        Oid oldrole, Oid newrole);
     111                 :             : 
     112                 :             : 
     113                 :             : /*
     114                 :             :  * recordSharedDependencyOn
     115                 :             :  *
     116                 :             :  * Record a dependency between 2 objects via their respective ObjectAddresses.
     117                 :             :  * The first argument is the dependent object, the second the one it
     118                 :             :  * references (which must be a shared object).
     119                 :             :  *
     120                 :             :  * This locks the referenced object and makes sure it still exists.
     121                 :             :  * Then it creates an entry in pg_shdepend.  The lock is kept until
     122                 :             :  * the end of the transaction.
     123                 :             :  *
     124                 :             :  * Dependencies on pinned objects are not recorded.
     125                 :             :  */
     126                 :             : void
     127                 :      124863 : recordSharedDependencyOn(ObjectAddress *depender,
     128                 :             :                          ObjectAddress *referenced,
     129                 :             :                          SharedDependencyType deptype)
     130                 :             : {
     131                 :             :     Relation    sdepRel;
     132                 :             : 
     133                 :             :     /*
     134                 :             :      * Objects in pg_shdepend can't have SubIds.
     135                 :             :      */
     136                 :             :     Assert(depender->objectSubId == 0);
     137                 :             :     Assert(referenced->objectSubId == 0);
     138                 :             : 
     139                 :             :     /*
     140                 :             :      * During bootstrap, do nothing since pg_shdepend may not exist yet.
     141                 :             :      * initdb will fill in appropriate pg_shdepend entries after bootstrap.
     142                 :             :      */
     143         [ -  + ]:      124863 :     if (IsBootstrapProcessingMode())
     144                 :           0 :         return;
     145                 :             : 
     146                 :      124863 :     sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
     147                 :             : 
     148                 :             :     /* If the referenced object is pinned, do nothing. */
     149         [ +  + ]:      124863 :     if (!IsPinnedObject(referenced->classId, referenced->objectId))
     150                 :             :     {
     151                 :        3396 :         shdepAddDependency(sdepRel, depender->classId, depender->objectId,
     152                 :             :                            depender->objectSubId,
     153                 :             :                            referenced->classId, referenced->objectId,
     154                 :             :                            deptype);
     155                 :             :     }
     156                 :             : 
     157                 :      124862 :     table_close(sdepRel, RowExclusiveLock);
     158                 :             : }
     159                 :             : 
     160                 :             : /*
     161                 :             :  * recordDependencyOnOwner
     162                 :             :  *
     163                 :             :  * A convenient wrapper of recordSharedDependencyOn -- register the specified
     164                 :             :  * user as owner of the given object.
     165                 :             :  *
     166                 :             :  * Note: it's the caller's responsibility to ensure that there isn't an owner
     167                 :             :  * entry for the object already.
     168                 :             :  */
     169                 :             : void
     170                 :      124646 : recordDependencyOnOwner(Oid classId, Oid objectId, Oid owner)
     171                 :             : {
     172                 :             :     ObjectAddress myself,
     173                 :             :                 referenced;
     174                 :             : 
     175                 :      124646 :     myself.classId = classId;
     176                 :      124646 :     myself.objectId = objectId;
     177                 :      124646 :     myself.objectSubId = 0;
     178                 :             : 
     179                 :      124646 :     referenced.classId = AuthIdRelationId;
     180                 :      124646 :     referenced.objectId = owner;
     181                 :      124646 :     referenced.objectSubId = 0;
     182                 :             : 
     183                 :      124646 :     recordSharedDependencyOn(&myself, &referenced, SHARED_DEPENDENCY_OWNER);
     184                 :      124646 : }
     185                 :             : 
     186                 :             : /*
     187                 :             :  * shdepChangeDep
     188                 :             :  *
     189                 :             :  * Update shared dependency records to account for an updated referenced
     190                 :             :  * object.  This is an internal workhorse for operations such as changing
     191                 :             :  * an object's owner.
     192                 :             :  *
     193                 :             :  * There must be no more than one existing entry for the given dependent
     194                 :             :  * object and dependency type!  So in practice this can only be used for
     195                 :             :  * updating SHARED_DEPENDENCY_OWNER and SHARED_DEPENDENCY_TABLESPACE
     196                 :             :  * entries, which should have that property.
     197                 :             :  *
     198                 :             :  * If there is no previous entry, we assume it was referencing a PINned
     199                 :             :  * object, so we create a new entry.  If the new referenced object is
     200                 :             :  * PINned, we don't create an entry (and drop the old one, if any).
     201                 :             :  * (For tablespaces, we don't record dependencies in certain cases, so
     202                 :             :  * there are other possible reasons for entries to be missing.)
     203                 :             :  *
     204                 :             :  * sdepRel must be the pg_shdepend relation, already opened and suitably
     205                 :             :  * locked.
     206                 :             :  */
     207                 :             : static void
     208                 :         589 : shdepChangeDep(Relation sdepRel,
     209                 :             :                Oid classid, Oid objid, int32 objsubid,
     210                 :             :                Oid refclassid, Oid refobjid,
     211                 :             :                SharedDependencyType deptype)
     212                 :             : {
     213                 :         589 :     Oid         dbid = classIdGetDbId(classid);
     214                 :         589 :     HeapTuple   oldtup = NULL;
     215                 :             :     HeapTuple   scantup;
     216                 :             :     ScanKeyData key[4];
     217                 :             :     SysScanDesc scan;
     218                 :             : 
     219                 :             :     /*
     220                 :             :      * Make sure the new referenced object doesn't go away while we record the
     221                 :             :      * dependency.
     222                 :             :      */
     223                 :         589 :     shdepLockAndCheckObject(refclassid, refobjid);
     224                 :             : 
     225                 :             :     /*
     226                 :             :      * Look for a previous entry
     227                 :             :      */
     228                 :         589 :     ScanKeyInit(&key[0],
     229                 :             :                 Anum_pg_shdepend_dbid,
     230                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
     231                 :             :                 ObjectIdGetDatum(dbid));
     232                 :         589 :     ScanKeyInit(&key[1],
     233                 :             :                 Anum_pg_shdepend_classid,
     234                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
     235                 :             :                 ObjectIdGetDatum(classid));
     236                 :         589 :     ScanKeyInit(&key[2],
     237                 :             :                 Anum_pg_shdepend_objid,
     238                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
     239                 :             :                 ObjectIdGetDatum(objid));
     240                 :         589 :     ScanKeyInit(&key[3],
     241                 :             :                 Anum_pg_shdepend_objsubid,
     242                 :             :                 BTEqualStrategyNumber, F_INT4EQ,
     243                 :             :                 Int32GetDatum(objsubid));
     244                 :             : 
     245                 :         589 :     scan = systable_beginscan(sdepRel, SharedDependDependerIndexId, true,
     246                 :             :                               NULL, 4, key);
     247                 :             : 
     248         [ +  + ]:         897 :     while ((scantup = systable_getnext(scan)) != NULL)
     249                 :             :     {
     250                 :             :         /* Ignore if not of the target dependency type */
     251         [ +  + ]:         308 :         if (((Form_pg_shdepend) GETSTRUCT(scantup))->deptype != deptype)
     252                 :          47 :             continue;
     253                 :             :         /* Caller screwed up if multiple matches */
     254         [ -  + ]:         261 :         if (oldtup)
     255         [ #  # ]:           0 :             elog(ERROR,
     256                 :             :                  "multiple pg_shdepend entries for object %u/%u/%d deptype %c",
     257                 :             :                  classid, objid, objsubid, deptype);
     258                 :         261 :         oldtup = heap_copytuple(scantup);
     259                 :             :     }
     260                 :             : 
     261                 :         589 :     systable_endscan(scan);
     262                 :             : 
     263         [ +  + ]:         589 :     if (IsPinnedObject(refclassid, refobjid))
     264                 :             :     {
     265                 :             :         /* No new entry needed, so just delete existing entry if any */
     266         [ +  + ]:          39 :         if (oldtup)
     267                 :          30 :             CatalogTupleDelete(sdepRel, &oldtup->t_self);
     268                 :             :     }
     269         [ +  + ]:         550 :     else if (oldtup)
     270                 :             :     {
     271                 :             :         /* Need to update existing entry */
     272                 :         231 :         Form_pg_shdepend shForm = (Form_pg_shdepend) GETSTRUCT(oldtup);
     273                 :             : 
     274                 :             :         /* Since oldtup is a copy, we can just modify it in-memory */
     275                 :         231 :         shForm->refclassid = refclassid;
     276                 :         231 :         shForm->refobjid = refobjid;
     277                 :             : 
     278                 :         231 :         CatalogTupleUpdate(sdepRel, &oldtup->t_self, oldtup);
     279                 :             :     }
     280                 :             :     else
     281                 :             :     {
     282                 :             :         /* Need to insert new entry */
     283                 :             :         Datum       values[Natts_pg_shdepend];
     284                 :             :         bool        nulls[Natts_pg_shdepend];
     285                 :             : 
     286                 :         319 :         memset(nulls, false, sizeof(nulls));
     287                 :             : 
     288                 :         319 :         values[Anum_pg_shdepend_dbid - 1] = ObjectIdGetDatum(dbid);
     289                 :         319 :         values[Anum_pg_shdepend_classid - 1] = ObjectIdGetDatum(classid);
     290                 :         319 :         values[Anum_pg_shdepend_objid - 1] = ObjectIdGetDatum(objid);
     291                 :         319 :         values[Anum_pg_shdepend_objsubid - 1] = Int32GetDatum(objsubid);
     292                 :             : 
     293                 :         319 :         values[Anum_pg_shdepend_refclassid - 1] = ObjectIdGetDatum(refclassid);
     294                 :         319 :         values[Anum_pg_shdepend_refobjid - 1] = ObjectIdGetDatum(refobjid);
     295                 :         319 :         values[Anum_pg_shdepend_deptype - 1] = CharGetDatum(deptype);
     296                 :             : 
     297                 :             :         /*
     298                 :             :          * we are reusing oldtup just to avoid declaring a new variable, but
     299                 :             :          * it's certainly a new tuple
     300                 :             :          */
     301                 :         319 :         oldtup = heap_form_tuple(RelationGetDescr(sdepRel), values, nulls);
     302                 :         319 :         CatalogTupleInsert(sdepRel, oldtup);
     303                 :             :     }
     304                 :             : 
     305         [ +  + ]:         589 :     if (oldtup)
     306                 :         580 :         heap_freetuple(oldtup);
     307                 :         589 : }
     308                 :             : 
     309                 :             : /*
     310                 :             :  * changeDependencyOnOwner
     311                 :             :  *
     312                 :             :  * Update the shared dependencies to account for the new owner.
     313                 :             :  *
     314                 :             :  * Note: we don't need an objsubid argument because only whole objects
     315                 :             :  * have owners.
     316                 :             :  */
     317                 :             : void
     318                 :         581 : changeDependencyOnOwner(Oid classId, Oid objectId, Oid newOwnerId)
     319                 :             : {
     320                 :             :     Relation    sdepRel;
     321                 :             : 
     322                 :         581 :     sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
     323                 :             : 
     324                 :             :     /* Adjust the SHARED_DEPENDENCY_OWNER entry */
     325                 :         581 :     shdepChangeDep(sdepRel,
     326                 :             :                    classId, objectId, 0,
     327                 :             :                    AuthIdRelationId, newOwnerId,
     328                 :             :                    SHARED_DEPENDENCY_OWNER);
     329                 :             : 
     330                 :             :     /*----------
     331                 :             :      * There should never be a SHARED_DEPENDENCY_ACL entry for the owner,
     332                 :             :      * so get rid of it if there is one.  This can happen if the new owner
     333                 :             :      * was previously granted some rights to the object.
     334                 :             :      *
     335                 :             :      * This step is analogous to aclnewowner's removal of duplicate entries
     336                 :             :      * in the ACL.  We have to do it to handle this scenario:
     337                 :             :      *      A grants some rights on an object to B
     338                 :             :      *      ALTER OWNER changes the object's owner to B
     339                 :             :      *      ALTER OWNER changes the object's owner to C
     340                 :             :      * The third step would remove all mention of B from the object's ACL,
     341                 :             :      * but we'd still have a SHARED_DEPENDENCY_ACL for B if we did not do
     342                 :             :      * things this way.
     343                 :             :      *
     344                 :             :      * The rule against having a SHARED_DEPENDENCY_ACL entry for the owner
     345                 :             :      * allows us to fix things up in just this one place, without having
     346                 :             :      * to make the various ALTER OWNER routines each know about it.
     347                 :             :      *----------
     348                 :             :      */
     349                 :         581 :     shdepDropDependency(sdepRel, classId, objectId, 0, true,
     350                 :             :                         AuthIdRelationId, newOwnerId,
     351                 :             :                         SHARED_DEPENDENCY_ACL);
     352                 :             : 
     353                 :             :     /*
     354                 :             :      * However, nothing need be done about SHARED_DEPENDENCY_INITACL entries,
     355                 :             :      * since those exist whether or not the role is the object's owner, and
     356                 :             :      * ALTER OWNER does not modify the underlying pg_init_privs entry.
     357                 :             :      */
     358                 :             : 
     359                 :         581 :     table_close(sdepRel, RowExclusiveLock);
     360                 :         581 : }
     361                 :             : 
     362                 :             : /*
     363                 :             :  * recordDependencyOnTablespace
     364                 :             :  *
     365                 :             :  * A convenient wrapper of recordSharedDependencyOn -- register the specified
     366                 :             :  * tablespace as default for the given object.
     367                 :             :  *
     368                 :             :  * Note: it's the caller's responsibility to ensure that there isn't a
     369                 :             :  * tablespace entry for the object already.
     370                 :             :  */
     371                 :             : void
     372                 :          76 : recordDependencyOnTablespace(Oid classId, Oid objectId, Oid tablespace)
     373                 :             : {
     374                 :             :     ObjectAddress myself,
     375                 :             :                 referenced;
     376                 :             : 
     377                 :          76 :     ObjectAddressSet(myself, classId, objectId);
     378                 :          76 :     ObjectAddressSet(referenced, TableSpaceRelationId, tablespace);
     379                 :             : 
     380                 :          76 :     recordSharedDependencyOn(&myself, &referenced,
     381                 :             :                              SHARED_DEPENDENCY_TABLESPACE);
     382                 :          75 : }
     383                 :             : 
     384                 :             : /*
     385                 :             :  * changeDependencyOnTablespace
     386                 :             :  *
     387                 :             :  * Update the shared dependencies to account for the new tablespace.
     388                 :             :  *
     389                 :             :  * Note: we don't need an objsubid argument because only whole objects
     390                 :             :  * have tablespaces.
     391                 :             :  */
     392                 :             : void
     393                 :          20 : changeDependencyOnTablespace(Oid classId, Oid objectId, Oid newTablespaceId)
     394                 :             : {
     395                 :             :     Relation    sdepRel;
     396                 :             : 
     397                 :          20 :     sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
     398                 :             : 
     399   [ +  -  +  + ]:          20 :     if (newTablespaceId != DEFAULTTABLESPACE_OID &&
     400                 :             :         newTablespaceId != InvalidOid)
     401                 :           8 :         shdepChangeDep(sdepRel,
     402                 :             :                        classId, objectId, 0,
     403                 :             :                        TableSpaceRelationId, newTablespaceId,
     404                 :             :                        SHARED_DEPENDENCY_TABLESPACE);
     405                 :             :     else
     406                 :          12 :         shdepDropDependency(sdepRel,
     407                 :             :                             classId, objectId, 0, true,
     408                 :             :                             InvalidOid, InvalidOid,
     409                 :             :                             SHARED_DEPENDENCY_INVALID);
     410                 :             : 
     411                 :          20 :     table_close(sdepRel, RowExclusiveLock);
     412                 :          20 : }
     413                 :             : 
     414                 :             : /*
     415                 :             :  * getOidListDiff
     416                 :             :  *      Helper for updateAclDependencies.
     417                 :             :  *
     418                 :             :  * Takes two Oid arrays and removes elements that are common to both arrays,
     419                 :             :  * leaving just those that are in one input but not the other.
     420                 :             :  * We assume both arrays have been sorted and de-duped.
     421                 :             :  */
     422                 :             : static void
     423                 :       15488 : getOidListDiff(Oid *list1, int *nlist1, Oid *list2, int *nlist2)
     424                 :             : {
     425                 :             :     int         in1,
     426                 :             :                 in2,
     427                 :             :                 out1,
     428                 :             :                 out2;
     429                 :             : 
     430                 :       15488 :     in1 = in2 = out1 = out2 = 0;
     431   [ +  +  +  + ]:       22569 :     while (in1 < *nlist1 && in2 < *nlist2)
     432                 :             :     {
     433         [ +  + ]:        7081 :         if (list1[in1] == list2[in2])
     434                 :             :         {
     435                 :             :             /* skip over duplicates */
     436                 :        6976 :             in1++;
     437                 :        6976 :             in2++;
     438                 :             :         }
     439         [ +  + ]:         105 :         else if (list1[in1] < list2[in2])
     440                 :             :         {
     441                 :             :             /* list1[in1] is not in list2 */
     442                 :          67 :             list1[out1++] = list1[in1++];
     443                 :             :         }
     444                 :             :         else
     445                 :             :         {
     446                 :             :             /* list2[in2] is not in list1 */
     447                 :          38 :             list2[out2++] = list2[in2++];
     448                 :             :         }
     449                 :             :     }
     450                 :             : 
     451                 :             :     /* any remaining list1 entries are not in list2 */
     452         [ +  + ]:       16088 :     while (in1 < *nlist1)
     453                 :             :     {
     454                 :         600 :         list1[out1++] = list1[in1++];
     455                 :             :     }
     456                 :             : 
     457                 :             :     /* any remaining list2 entries are not in list1 */
     458         [ +  + ]:       26433 :     while (in2 < *nlist2)
     459                 :             :     {
     460                 :       10945 :         list2[out2++] = list2[in2++];
     461                 :             :     }
     462                 :             : 
     463                 :       15488 :     *nlist1 = out1;
     464                 :       15488 :     *nlist2 = out2;
     465                 :       15488 : }
     466                 :             : 
     467                 :             : /*
     468                 :             :  * updateAclDependencies
     469                 :             :  *      Update the pg_shdepend info for an object's ACL during GRANT/REVOKE.
     470                 :             :  *
     471                 :             :  * classId, objectId, objsubId: identify the object whose ACL this is
     472                 :             :  * ownerId: role owning the object
     473                 :             :  * noldmembers, oldmembers: array of roleids appearing in old ACL
     474                 :             :  * nnewmembers, newmembers: array of roleids appearing in new ACL
     475                 :             :  *
     476                 :             :  * We calculate the differences between the new and old lists of roles,
     477                 :             :  * and then insert or delete from pg_shdepend as appropriate.
     478                 :             :  *
     479                 :             :  * Note that we can't just insert all referenced roles blindly during GRANT,
     480                 :             :  * because we would end up with duplicate registered dependencies.  We could
     481                 :             :  * check for existence of the tuples before inserting, but that seems to be
     482                 :             :  * more expensive than what we are doing here.  Likewise we can't just delete
     483                 :             :  * blindly during REVOKE, because the user may still have other privileges.
     484                 :             :  * It is also possible that REVOKE actually adds dependencies, due to
     485                 :             :  * instantiation of a formerly implicit default ACL (although at present,
     486                 :             :  * all such dependencies should be for the owning role, which we ignore here).
     487                 :             :  *
     488                 :             :  * NOTE: Both input arrays must be sorted and de-duped.  (Typically they
     489                 :             :  * are extracted from an ACL array by aclmembers(), which takes care of
     490                 :             :  * both requirements.)  The arrays are pfreed before return.
     491                 :             :  */
     492                 :             : void
     493                 :       14957 : updateAclDependencies(Oid classId, Oid objectId, int32 objsubId,
     494                 :             :                       Oid ownerId,
     495                 :             :                       int noldmembers, Oid *oldmembers,
     496                 :             :                       int nnewmembers, Oid *newmembers)
     497                 :             : {
     498                 :       14957 :     updateAclDependenciesWorker(classId, objectId, objsubId,
     499                 :             :                                 ownerId, SHARED_DEPENDENCY_ACL,
     500                 :             :                                 noldmembers, oldmembers,
     501                 :             :                                 nnewmembers, newmembers);
     502                 :       14957 : }
     503                 :             : 
     504                 :             : /*
     505                 :             :  * updateInitAclDependencies
     506                 :             :  *      Update the pg_shdepend info for a pg_init_privs entry.
     507                 :             :  *
     508                 :             :  * Exactly like updateAclDependencies, except we are considering a
     509                 :             :  * pg_init_privs ACL for the specified object.  Since recording of
     510                 :             :  * pg_init_privs role dependencies is the same for owners and non-owners,
     511                 :             :  * we do not need an ownerId argument.
     512                 :             :  */
     513                 :             : void
     514                 :         531 : updateInitAclDependencies(Oid classId, Oid objectId, int32 objsubId,
     515                 :             :                           int noldmembers, Oid *oldmembers,
     516                 :             :                           int nnewmembers, Oid *newmembers)
     517                 :             : {
     518                 :         531 :     updateAclDependenciesWorker(classId, objectId, objsubId,
     519                 :             :                                 InvalidOid, /* ownerId will not be consulted */
     520                 :             :                                 SHARED_DEPENDENCY_INITACL,
     521                 :             :                                 noldmembers, oldmembers,
     522                 :             :                                 nnewmembers, newmembers);
     523                 :         531 : }
     524                 :             : 
     525                 :             : /* Common code for the above two functions */
     526                 :             : static void
     527                 :       15488 : updateAclDependenciesWorker(Oid classId, Oid objectId, int32 objsubId,
     528                 :             :                             Oid ownerId, SharedDependencyType deptype,
     529                 :             :                             int noldmembers, Oid *oldmembers,
     530                 :             :                             int nnewmembers, Oid *newmembers)
     531                 :             : {
     532                 :             :     Relation    sdepRel;
     533                 :             :     int         i;
     534                 :             : 
     535                 :             :     /*
     536                 :             :      * Remove entries that are common to both lists; those represent existing
     537                 :             :      * dependencies we don't need to change.
     538                 :             :      *
     539                 :             :      * OK to overwrite the inputs since we'll pfree them anyway.
     540                 :             :      */
     541                 :       15488 :     getOidListDiff(oldmembers, &noldmembers, newmembers, &nnewmembers);
     542                 :             : 
     543   [ +  +  +  + ]:       15488 :     if (noldmembers > 0 || nnewmembers > 0)
     544                 :             :     {
     545                 :       10486 :         sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
     546                 :             : 
     547                 :             :         /* Add new dependencies that weren't already present */
     548         [ +  + ]:       21469 :         for (i = 0; i < nnewmembers; i++)
     549                 :             :         {
     550                 :       10983 :             Oid         roleid = newmembers[i];
     551                 :             : 
     552                 :             :             /*
     553                 :             :              * For SHARED_DEPENDENCY_ACL entries, skip the owner: she has an
     554                 :             :              * OWNER shdep entry instead.  (This is not just a space
     555                 :             :              * optimization; it makes ALTER OWNER easier.  See notes in
     556                 :             :              * changeDependencyOnOwner.)  But for INITACL entries, we record
     557                 :             :              * the owner too.
     558                 :             :              */
     559   [ +  +  +  + ]:       10983 :             if (deptype == SHARED_DEPENDENCY_ACL && roleid == ownerId)
     560                 :        8261 :                 continue;
     561                 :             : 
     562                 :             :             /* Skip pinned roles; they don't need dependency entries */
     563         [ +  + ]:        2722 :             if (IsPinnedObject(AuthIdRelationId, roleid))
     564                 :        1149 :                 continue;
     565                 :             : 
     566                 :        1573 :             shdepAddDependency(sdepRel, classId, objectId, objsubId,
     567                 :             :                                AuthIdRelationId, roleid,
     568                 :             :                                deptype);
     569                 :             :         }
     570                 :             : 
     571                 :             :         /* Drop no-longer-used old dependencies */
     572         [ +  + ]:       11153 :         for (i = 0; i < noldmembers; i++)
     573                 :             :         {
     574                 :         667 :             Oid         roleid = oldmembers[i];
     575                 :             : 
     576                 :             :             /* Skip the owner for ACL entries, same as above */
     577   [ +  +  +  + ]:         667 :             if (deptype == SHARED_DEPENDENCY_ACL && roleid == ownerId)
     578                 :          85 :                 continue;
     579                 :             : 
     580                 :             :             /* Skip pinned roles */
     581         [ +  + ]:         582 :             if (IsPinnedObject(AuthIdRelationId, roleid))
     582                 :          53 :                 continue;
     583                 :             : 
     584                 :         529 :             shdepDropDependency(sdepRel, classId, objectId, objsubId,
     585                 :             :                                 false,  /* exact match on objsubId */
     586                 :             :                                 AuthIdRelationId, roleid,
     587                 :             :                                 deptype);
     588                 :             :         }
     589                 :             : 
     590                 :       10486 :         table_close(sdepRel, RowExclusiveLock);
     591                 :             :     }
     592                 :             : 
     593         [ +  + ]:       15488 :     if (oldmembers)
     594                 :        6367 :         pfree(oldmembers);
     595         [ +  + ]:       15488 :     if (newmembers)
     596                 :       15303 :         pfree(newmembers);
     597                 :       15488 : }
     598                 :             : 
     599                 :             : /*
     600                 :             :  * A struct to keep track of dependencies found in other databases.
     601                 :             :  */
     602                 :             : typedef struct
     603                 :             : {
     604                 :             :     Oid         dbOid;
     605                 :             :     int         count;
     606                 :             : } remoteDep;
     607                 :             : 
     608                 :             : /*
     609                 :             :  * qsort comparator for ShDependObjectInfo items
     610                 :             :  */
     611                 :             : static int
     612                 :         104 : shared_dependency_comparator(const void *a, const void *b)
     613                 :             : {
     614                 :         104 :     const ShDependObjectInfo *obja = (const ShDependObjectInfo *) a;
     615                 :         104 :     const ShDependObjectInfo *objb = (const ShDependObjectInfo *) b;
     616                 :             : 
     617                 :             :     /*
     618                 :             :      * Primary sort key is OID ascending.
     619                 :             :      */
     620         [ +  + ]:         104 :     if (obja->object.objectId < objb->object.objectId)
     621                 :          82 :         return -1;
     622         [ +  - ]:          22 :     if (obja->object.objectId > objb->object.objectId)
     623                 :          22 :         return 1;
     624                 :             : 
     625                 :             :     /*
     626                 :             :      * Next sort on catalog ID, in case identical OIDs appear in different
     627                 :             :      * catalogs.  Sort direction is pretty arbitrary here.
     628                 :             :      */
     629         [ #  # ]:           0 :     if (obja->object.classId < objb->object.classId)
     630                 :           0 :         return -1;
     631         [ #  # ]:           0 :     if (obja->object.classId > objb->object.classId)
     632                 :           0 :         return 1;
     633                 :             : 
     634                 :             :     /*
     635                 :             :      * Sort on object subId.
     636                 :             :      *
     637                 :             :      * We sort the subId as an unsigned int so that 0 (the whole object) will
     638                 :             :      * come first.
     639                 :             :      */
     640         [ #  # ]:           0 :     if ((unsigned int) obja->object.objectSubId < (unsigned int) objb->object.objectSubId)
     641                 :           0 :         return -1;
     642         [ #  # ]:           0 :     if ((unsigned int) obja->object.objectSubId > (unsigned int) objb->object.objectSubId)
     643                 :           0 :         return 1;
     644                 :             : 
     645                 :             :     /*
     646                 :             :      * Last, sort on deptype, in case the same object has multiple dependency
     647                 :             :      * types.  (Note that there's no need to consider objtype, as that's
     648                 :             :      * determined by the catalog OID.)
     649                 :             :      */
     650         [ #  # ]:           0 :     if (obja->deptype < objb->deptype)
     651                 :           0 :         return -1;
     652         [ #  # ]:           0 :     if (obja->deptype > objb->deptype)
     653                 :           0 :         return 1;
     654                 :             : 
     655                 :           0 :     return 0;
     656                 :             : }
     657                 :             : 
     658                 :             : /*
     659                 :             :  * checkSharedDependencies
     660                 :             :  *
     661                 :             :  * Check whether there are shared dependency entries for a given shared
     662                 :             :  * object; return true if so.
     663                 :             :  *
     664                 :             :  * In addition, return a string containing a newline-separated list of object
     665                 :             :  * descriptions that depend on the shared object, or NULL if none is found.
     666                 :             :  * We actually return two such strings; the "detail" result is suitable for
     667                 :             :  * returning to the client as an errdetail() string, and is limited in size.
     668                 :             :  * The "detail_log" string is potentially much longer, and should be emitted
     669                 :             :  * to the server log only.
     670                 :             :  *
     671                 :             :  * We can find three different kinds of dependencies: dependencies on objects
     672                 :             :  * of the current database; dependencies on shared objects; and dependencies
     673                 :             :  * on objects local to other databases.  We can (and do) provide descriptions
     674                 :             :  * of the two former kinds of objects, but we can't do that for "remote"
     675                 :             :  * objects, so we just provide a count of them.
     676                 :             :  */
     677                 :             : bool
     678                 :        1139 : checkSharedDependencies(Oid classId, Oid objectId,
     679                 :             :                         char **detail_msg, char **detail_log_msg)
     680                 :             : {
     681                 :             :     Relation    sdepRel;
     682                 :             :     ScanKeyData key[2];
     683                 :             :     SysScanDesc scan;
     684                 :             :     HeapTuple   tup;
     685                 :        1139 :     int         numReportedDeps = 0;
     686                 :        1139 :     int         numNotReportedDeps = 0;
     687                 :        1139 :     int         numNotReportedDbs = 0;
     688                 :        1139 :     List       *remDeps = NIL;
     689                 :             :     ListCell   *cell;
     690                 :             :     ObjectAddress object;
     691                 :             :     ShDependObjectInfo *objects;
     692                 :             :     int         numobjects;
     693                 :             :     int         allocedobjects;
     694                 :             :     StringInfoData descs;
     695                 :             :     StringInfoData alldescs;
     696                 :             : 
     697                 :             :     /* This case can be dispatched quickly */
     698         [ -  + ]:        1139 :     if (IsPinnedObject(classId, objectId))
     699                 :             :     {
     700                 :           0 :         object.classId = classId;
     701                 :           0 :         object.objectId = objectId;
     702                 :           0 :         object.objectSubId = 0;
     703         [ #  # ]:           0 :         ereport(ERROR,
     704                 :             :                 (errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
     705                 :             :                  errmsg("cannot drop %s because it is required by the database system",
     706                 :             :                         getObjectDescription(&object, false))));
     707                 :             :     }
     708                 :             : 
     709                 :             :     /*
     710                 :             :      * We limit the number of dependencies reported to the client to
     711                 :             :      * MAX_REPORTED_DEPS, since client software may not deal well with
     712                 :             :      * enormous error strings.  The server log always gets a full report.
     713                 :             :      *
     714                 :             :      * For stability of regression test results, we sort local and shared
     715                 :             :      * objects by OID before reporting them.  We don't worry about the order
     716                 :             :      * in which other databases are reported, though.
     717                 :             :      */
     718                 :             : #define MAX_REPORTED_DEPS 100
     719                 :             : 
     720                 :        1139 :     allocedobjects = 128;       /* arbitrary initial array size */
     721                 :        1139 :     objects = palloc_array(ShDependObjectInfo, allocedobjects);
     722                 :        1139 :     numobjects = 0;
     723                 :        1139 :     initStringInfo(&descs);
     724                 :        1139 :     initStringInfo(&alldescs);
     725                 :             : 
     726                 :        1139 :     sdepRel = table_open(SharedDependRelationId, AccessShareLock);
     727                 :             : 
     728                 :        1139 :     ScanKeyInit(&key[0],
     729                 :             :                 Anum_pg_shdepend_refclassid,
     730                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
     731                 :             :                 ObjectIdGetDatum(classId));
     732                 :        1139 :     ScanKeyInit(&key[1],
     733                 :             :                 Anum_pg_shdepend_refobjid,
     734                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
     735                 :             :                 ObjectIdGetDatum(objectId));
     736                 :             : 
     737                 :        1139 :     scan = systable_beginscan(sdepRel, SharedDependReferenceIndexId, true,
     738                 :             :                               NULL, 2, key);
     739                 :             : 
     740         [ +  + ]:        1327 :     while (HeapTupleIsValid(tup = systable_getnext(scan)))
     741                 :             :     {
     742                 :         188 :         Form_pg_shdepend sdepForm = (Form_pg_shdepend) GETSTRUCT(tup);
     743                 :             : 
     744                 :         188 :         object.classId = sdepForm->classid;
     745                 :         188 :         object.objectId = sdepForm->objid;
     746                 :         188 :         object.objectSubId = sdepForm->objsubid;
     747                 :             : 
     748                 :             :         /*
     749                 :             :          * If it's a dependency local to this database or it's a shared
     750                 :             :          * object, add it to the objects array.
     751                 :             :          *
     752                 :             :          * If it's a remote dependency, keep track of it so we can report the
     753                 :             :          * number of them later.
     754                 :             :          */
     755         [ +  + ]:         188 :         if (sdepForm->dbid == MyDatabaseId ||
     756         [ +  - ]:          50 :             sdepForm->dbid == InvalidOid)
     757                 :             :         {
     758         [ -  + ]:         188 :             if (numobjects >= allocedobjects)
     759                 :             :             {
     760                 :           0 :                 allocedobjects *= 2;
     761                 :           0 :                 objects = repalloc_array(objects, ShDependObjectInfo, allocedobjects);
     762                 :             :             }
     763                 :         188 :             objects[numobjects].object = object;
     764                 :         188 :             objects[numobjects].deptype = sdepForm->deptype;
     765                 :         188 :             objects[numobjects].objtype = (sdepForm->dbid == MyDatabaseId) ?
     766                 :         188 :                 LOCAL_OBJECT : SHARED_OBJECT;
     767                 :         188 :             numobjects++;
     768                 :             :         }
     769                 :             :         else
     770                 :             :         {
     771                 :             :             /* It's not local nor shared, so it must be remote. */
     772                 :             :             remoteDep  *dep;
     773                 :           0 :             bool        stored = false;
     774                 :             : 
     775                 :             :             /*
     776                 :             :              * XXX this info is kept on a simple List.  Maybe it's not good
     777                 :             :              * for performance, but using a hash table seems needlessly
     778                 :             :              * complex.  The expected number of databases is not high anyway,
     779                 :             :              * I suppose.
     780                 :             :              */
     781   [ #  #  #  #  :           0 :             foreach(cell, remDeps)
                   #  # ]
     782                 :             :             {
     783                 :           0 :                 dep = lfirst(cell);
     784         [ #  # ]:           0 :                 if (dep->dbOid == sdepForm->dbid)
     785                 :             :                 {
     786                 :           0 :                     dep->count++;
     787                 :           0 :                     stored = true;
     788                 :           0 :                     break;
     789                 :             :                 }
     790                 :             :             }
     791         [ #  # ]:           0 :             if (!stored)
     792                 :             :             {
     793                 :           0 :                 dep = palloc_object(remoteDep);
     794                 :           0 :                 dep->dbOid = sdepForm->dbid;
     795                 :           0 :                 dep->count = 1;
     796                 :           0 :                 remDeps = lappend(remDeps, dep);
     797                 :             :             }
     798                 :             :         }
     799                 :             :     }
     800                 :             : 
     801                 :        1139 :     systable_endscan(scan);
     802                 :             : 
     803                 :        1139 :     table_close(sdepRel, AccessShareLock);
     804                 :             : 
     805                 :             :     /*
     806                 :             :      * Sort and report local and shared objects.
     807                 :             :      */
     808         [ +  + ]:        1139 :     if (numobjects > 1)
     809                 :          37 :         qsort(objects, numobjects,
     810                 :             :               sizeof(ShDependObjectInfo), shared_dependency_comparator);
     811                 :             : 
     812         [ +  + ]:        1327 :     for (int i = 0; i < numobjects; i++)
     813                 :             :     {
     814         [ +  - ]:         188 :         if (numReportedDeps < MAX_REPORTED_DEPS)
     815                 :             :         {
     816                 :         188 :             numReportedDeps++;
     817                 :         188 :             storeObjectDescription(&descs,
     818                 :         188 :                                    objects[i].objtype,
     819                 :         188 :                                    &objects[i].object,
     820                 :         188 :                                    objects[i].deptype,
     821                 :             :                                    0);
     822                 :             :         }
     823                 :             :         else
     824                 :           0 :             numNotReportedDeps++;
     825                 :         188 :         storeObjectDescription(&alldescs,
     826                 :         188 :                                objects[i].objtype,
     827                 :         188 :                                &objects[i].object,
     828                 :         188 :                                objects[i].deptype,
     829                 :             :                                0);
     830                 :             :     }
     831                 :             : 
     832                 :             :     /*
     833                 :             :      * Summarize dependencies in remote databases.
     834                 :             :      */
     835   [ -  +  -  -  :        1139 :     foreach(cell, remDeps)
                   -  + ]
     836                 :             :     {
     837                 :           0 :         remoteDep  *dep = lfirst(cell);
     838                 :             : 
     839                 :           0 :         object.classId = DatabaseRelationId;
     840                 :           0 :         object.objectId = dep->dbOid;
     841                 :           0 :         object.objectSubId = 0;
     842                 :             : 
     843         [ #  # ]:           0 :         if (numReportedDeps < MAX_REPORTED_DEPS)
     844                 :             :         {
     845                 :           0 :             numReportedDeps++;
     846                 :           0 :             storeObjectDescription(&descs, REMOTE_OBJECT, &object,
     847                 :             :                                    SHARED_DEPENDENCY_INVALID, dep->count);
     848                 :             :         }
     849                 :             :         else
     850                 :           0 :             numNotReportedDbs++;
     851                 :           0 :         storeObjectDescription(&alldescs, REMOTE_OBJECT, &object,
     852                 :             :                                SHARED_DEPENDENCY_INVALID, dep->count);
     853                 :             :     }
     854                 :             : 
     855                 :        1139 :     pfree(objects);
     856                 :        1139 :     list_free_deep(remDeps);
     857                 :             : 
     858         [ +  + ]:        1139 :     if (descs.len == 0)
     859                 :             :     {
     860                 :        1048 :         pfree(descs.data);
     861                 :        1048 :         pfree(alldescs.data);
     862                 :        1048 :         *detail_msg = *detail_log_msg = NULL;
     863                 :        1048 :         return false;
     864                 :             :     }
     865                 :             : 
     866         [ -  + ]:          91 :     if (numNotReportedDeps > 0)
     867                 :           0 :         appendStringInfo(&descs, ngettext("\nand %d other object "
     868                 :             :                                           "(see server log for list)",
     869                 :             :                                           "\nand %d other objects "
     870                 :             :                                           "(see server log for list)",
     871                 :             :                                           numNotReportedDeps),
     872                 :             :                          numNotReportedDeps);
     873         [ -  + ]:          91 :     if (numNotReportedDbs > 0)
     874                 :           0 :         appendStringInfo(&descs, ngettext("\nand objects in %d other database "
     875                 :             :                                           "(see server log for list)",
     876                 :             :                                           "\nand objects in %d other databases "
     877                 :             :                                           "(see server log for list)",
     878                 :             :                                           numNotReportedDbs),
     879                 :             :                          numNotReportedDbs);
     880                 :             : 
     881                 :          91 :     *detail_msg = descs.data;
     882                 :          91 :     *detail_log_msg = alldescs.data;
     883                 :          91 :     return true;
     884                 :             : }
     885                 :             : 
     886                 :             : 
     887                 :             : /*
     888                 :             :  * copyTemplateDependencies
     889                 :             :  *
     890                 :             :  * Routine to create the initial shared dependencies of a new database.
     891                 :             :  * We simply copy the dependencies from the template database.
     892                 :             :  */
     893                 :             : void
     894                 :         451 : copyTemplateDependencies(Oid templateDbId, Oid newDbId)
     895                 :             : {
     896                 :             :     Relation    sdepRel;
     897                 :             :     TupleDesc   sdepDesc;
     898                 :             :     ScanKeyData key[1];
     899                 :             :     SysScanDesc scan;
     900                 :             :     HeapTuple   tup;
     901                 :             :     CatalogIndexState indstate;
     902                 :             :     TupleTableSlot **slot;
     903                 :             :     int         max_slots,
     904                 :             :                 slot_init_count,
     905                 :             :                 slot_stored_count;
     906                 :             : 
     907                 :         451 :     sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
     908                 :         451 :     sdepDesc = RelationGetDescr(sdepRel);
     909                 :             : 
     910                 :             :     /*
     911                 :             :      * Allocate the slots to use, but delay costly initialization until we
     912                 :             :      * know that they will be used.
     913                 :             :      */
     914                 :         451 :     max_slots = MAX_CATALOG_MULTI_INSERT_BYTES / sizeof(FormData_pg_shdepend);
     915                 :         451 :     slot = palloc_array(TupleTableSlot *, max_slots);
     916                 :             : 
     917                 :         451 :     indstate = CatalogOpenIndexes(sdepRel);
     918                 :             : 
     919                 :             :     /* Scan all entries with dbid = templateDbId */
     920                 :         451 :     ScanKeyInit(&key[0],
     921                 :             :                 Anum_pg_shdepend_dbid,
     922                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
     923                 :             :                 ObjectIdGetDatum(templateDbId));
     924                 :             : 
     925                 :         451 :     scan = systable_beginscan(sdepRel, SharedDependDependerIndexId, true,
     926                 :             :                               NULL, 1, key);
     927                 :             : 
     928                 :             :     /* number of slots currently storing tuples */
     929                 :         451 :     slot_stored_count = 0;
     930                 :             :     /* number of slots currently initialized */
     931                 :         451 :     slot_init_count = 0;
     932                 :             : 
     933                 :             :     /*
     934                 :             :      * Copy the entries of the original database, changing the database Id to
     935                 :             :      * that of the new database.  Note that because we are not copying rows
     936                 :             :      * with dbId == 0 (ie, rows describing dependent shared objects) we won't
     937                 :             :      * copy the ownership dependency of the template database itself; this is
     938                 :             :      * what we want.
     939                 :             :      */
     940         [ +  + ]:         463 :     while (HeapTupleIsValid(tup = systable_getnext(scan)))
     941                 :             :     {
     942                 :             :         Form_pg_shdepend shdep;
     943                 :             : 
     944         [ +  - ]:          12 :         if (slot_init_count < max_slots)
     945                 :             :         {
     946                 :          12 :             slot[slot_stored_count] = MakeSingleTupleTableSlot(sdepDesc, &TTSOpsHeapTuple);
     947                 :          12 :             slot_init_count++;
     948                 :             :         }
     949                 :             : 
     950                 :          12 :         ExecClearTuple(slot[slot_stored_count]);
     951                 :             : 
     952                 :          12 :         memset(slot[slot_stored_count]->tts_isnull, false,
     953                 :          12 :                slot[slot_stored_count]->tts_tupleDescriptor->natts * sizeof(bool));
     954                 :             : 
     955                 :          12 :         shdep = (Form_pg_shdepend) GETSTRUCT(tup);
     956                 :             : 
     957                 :          12 :         slot[slot_stored_count]->tts_values[Anum_pg_shdepend_dbid - 1] = ObjectIdGetDatum(newDbId);
     958                 :          12 :         slot[slot_stored_count]->tts_values[Anum_pg_shdepend_classid - 1] = ObjectIdGetDatum(shdep->classid);
     959                 :          12 :         slot[slot_stored_count]->tts_values[Anum_pg_shdepend_objid - 1] = ObjectIdGetDatum(shdep->objid);
     960                 :          12 :         slot[slot_stored_count]->tts_values[Anum_pg_shdepend_objsubid - 1] = Int32GetDatum(shdep->objsubid);
     961                 :          12 :         slot[slot_stored_count]->tts_values[Anum_pg_shdepend_refclassid - 1] = ObjectIdGetDatum(shdep->refclassid);
     962                 :          12 :         slot[slot_stored_count]->tts_values[Anum_pg_shdepend_refobjid - 1] = ObjectIdGetDatum(shdep->refobjid);
     963                 :          12 :         slot[slot_stored_count]->tts_values[Anum_pg_shdepend_deptype - 1] = CharGetDatum(shdep->deptype);
     964                 :             : 
     965                 :          12 :         ExecStoreVirtualTuple(slot[slot_stored_count]);
     966                 :          12 :         slot_stored_count++;
     967                 :             : 
     968                 :             :         /* If slots are full, insert a batch of tuples */
     969         [ -  + ]:          12 :         if (slot_stored_count == max_slots)
     970                 :             :         {
     971                 :           0 :             CatalogTuplesMultiInsertWithInfo(sdepRel, slot, slot_stored_count, indstate);
     972                 :           0 :             slot_stored_count = 0;
     973                 :             :         }
     974                 :             :     }
     975                 :             : 
     976                 :             :     /* Insert any tuples left in the buffer */
     977         [ +  + ]:         451 :     if (slot_stored_count > 0)
     978                 :           6 :         CatalogTuplesMultiInsertWithInfo(sdepRel, slot, slot_stored_count, indstate);
     979                 :             : 
     980                 :         451 :     systable_endscan(scan);
     981                 :             : 
     982                 :         451 :     CatalogCloseIndexes(indstate);
     983                 :         451 :     table_close(sdepRel, RowExclusiveLock);
     984                 :             : 
     985                 :             :     /* Drop only the number of slots used */
     986         [ +  + ]:         463 :     for (int i = 0; i < slot_init_count; i++)
     987                 :          12 :         ExecDropSingleTupleTableSlot(slot[i]);
     988                 :         451 :     pfree(slot);
     989                 :         451 : }
     990                 :             : 
     991                 :             : /*
     992                 :             :  * dropDatabaseDependencies
     993                 :             :  *
     994                 :             :  * Delete pg_shdepend entries corresponding to a database that's being
     995                 :             :  * dropped.
     996                 :             :  */
     997                 :             : void
     998                 :          67 : dropDatabaseDependencies(Oid databaseId)
     999                 :             : {
    1000                 :             :     Relation    sdepRel;
    1001                 :             :     ScanKeyData key[1];
    1002                 :             :     SysScanDesc scan;
    1003                 :             :     HeapTuple   tup;
    1004                 :             : 
    1005                 :          67 :     sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
    1006                 :             : 
    1007                 :             :     /*
    1008                 :             :      * First, delete all the entries that have the database Oid in the dbid
    1009                 :             :      * field.
    1010                 :             :      */
    1011                 :          67 :     ScanKeyInit(&key[0],
    1012                 :             :                 Anum_pg_shdepend_dbid,
    1013                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
    1014                 :             :                 ObjectIdGetDatum(databaseId));
    1015                 :             :     /* We leave the other index fields unspecified */
    1016                 :             : 
    1017                 :          67 :     scan = systable_beginscan(sdepRel, SharedDependDependerIndexId, true,
    1018                 :             :                               NULL, 1, key);
    1019                 :             : 
    1020         [ +  + ]:          72 :     while (HeapTupleIsValid(tup = systable_getnext(scan)))
    1021                 :             :     {
    1022                 :           5 :         CatalogTupleDelete(sdepRel, &tup->t_self);
    1023                 :             :     }
    1024                 :             : 
    1025                 :          67 :     systable_endscan(scan);
    1026                 :             : 
    1027                 :             :     /* Now delete all entries corresponding to the database itself */
    1028                 :          67 :     shdepDropDependency(sdepRel, DatabaseRelationId, databaseId, 0, true,
    1029                 :             :                         InvalidOid, InvalidOid,
    1030                 :             :                         SHARED_DEPENDENCY_INVALID);
    1031                 :             : 
    1032                 :          67 :     table_close(sdepRel, RowExclusiveLock);
    1033                 :          67 : }
    1034                 :             : 
    1035                 :             : /*
    1036                 :             :  * deleteSharedDependencyRecordsFor
    1037                 :             :  *
    1038                 :             :  * Delete all pg_shdepend entries corresponding to an object that's being
    1039                 :             :  * dropped or modified.  The object is assumed to be either a shared object
    1040                 :             :  * or local to the current database (the classId tells us which).
    1041                 :             :  *
    1042                 :             :  * If objectSubId is zero, we are deleting a whole object, so get rid of
    1043                 :             :  * pg_shdepend entries for subobjects as well.
    1044                 :             :  */
    1045                 :             : void
    1046                 :      159955 : deleteSharedDependencyRecordsFor(Oid classId, Oid objectId, int32 objectSubId)
    1047                 :             : {
    1048                 :             :     Relation    sdepRel;
    1049                 :             : 
    1050                 :      159955 :     sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
    1051                 :             : 
    1052                 :      159955 :     shdepDropDependency(sdepRel, classId, objectId, objectSubId,
    1053                 :             :                         (objectSubId == 0),
    1054                 :             :                         InvalidOid, InvalidOid,
    1055                 :             :                         SHARED_DEPENDENCY_INVALID);
    1056                 :             : 
    1057                 :      159955 :     table_close(sdepRel, RowExclusiveLock);
    1058                 :      159955 : }
    1059                 :             : 
    1060                 :             : /*
    1061                 :             :  * shdepAddDependency
    1062                 :             :  *      Internal workhorse for inserting into pg_shdepend
    1063                 :             :  *
    1064                 :             :  * sdepRel must be the pg_shdepend relation, already opened and suitably
    1065                 :             :  * locked.
    1066                 :             :  */
    1067                 :             : static void
    1068                 :        4969 : shdepAddDependency(Relation sdepRel,
    1069                 :             :                    Oid classId, Oid objectId, int32 objsubId,
    1070                 :             :                    Oid refclassId, Oid refobjId,
    1071                 :             :                    SharedDependencyType deptype)
    1072                 :             : {
    1073                 :             :     HeapTuple   tup;
    1074                 :             :     Datum       values[Natts_pg_shdepend];
    1075                 :             :     bool        nulls[Natts_pg_shdepend];
    1076                 :             : 
    1077                 :             :     /*
    1078                 :             :      * Make sure the object doesn't go away while we record the dependency on
    1079                 :             :      * it.  DROP routines should lock the object exclusively before they check
    1080                 :             :      * shared dependencies.
    1081                 :             :      */
    1082                 :        4969 :     shdepLockAndCheckObject(refclassId, refobjId);
    1083                 :             : 
    1084                 :        4968 :     memset(nulls, false, sizeof(nulls));
    1085                 :             : 
    1086                 :             :     /*
    1087                 :             :      * Form the new tuple and record the dependency.
    1088                 :             :      */
    1089                 :        4968 :     values[Anum_pg_shdepend_dbid - 1] = ObjectIdGetDatum(classIdGetDbId(classId));
    1090                 :        4968 :     values[Anum_pg_shdepend_classid - 1] = ObjectIdGetDatum(classId);
    1091                 :        4968 :     values[Anum_pg_shdepend_objid - 1] = ObjectIdGetDatum(objectId);
    1092                 :        4968 :     values[Anum_pg_shdepend_objsubid - 1] = Int32GetDatum(objsubId);
    1093                 :             : 
    1094                 :        4968 :     values[Anum_pg_shdepend_refclassid - 1] = ObjectIdGetDatum(refclassId);
    1095                 :        4968 :     values[Anum_pg_shdepend_refobjid - 1] = ObjectIdGetDatum(refobjId);
    1096                 :        4968 :     values[Anum_pg_shdepend_deptype - 1] = CharGetDatum(deptype);
    1097                 :             : 
    1098                 :        4968 :     tup = heap_form_tuple(sdepRel->rd_att, values, nulls);
    1099                 :             : 
    1100                 :        4968 :     CatalogTupleInsert(sdepRel, tup);
    1101                 :             : 
    1102                 :             :     /* clean up */
    1103                 :        4968 :     heap_freetuple(tup);
    1104                 :        4968 : }
    1105                 :             : 
    1106                 :             : /*
    1107                 :             :  * shdepDropDependency
    1108                 :             :  *      Internal workhorse for deleting entries from pg_shdepend.
    1109                 :             :  *
    1110                 :             :  * We drop entries having the following properties:
    1111                 :             :  *  dependent object is the one identified by classId/objectId/objsubId
    1112                 :             :  *  if refclassId isn't InvalidOid, it must match the entry's refclassid
    1113                 :             :  *  if refobjId isn't InvalidOid, it must match the entry's refobjid
    1114                 :             :  *  if deptype isn't SHARED_DEPENDENCY_INVALID, it must match entry's deptype
    1115                 :             :  *
    1116                 :             :  * If drop_subobjects is true, we ignore objsubId and consider all entries
    1117                 :             :  * matching classId/objectId.
    1118                 :             :  *
    1119                 :             :  * sdepRel must be the pg_shdepend relation, already opened and suitably
    1120                 :             :  * locked.
    1121                 :             :  */
    1122                 :             : static void
    1123                 :      161144 : shdepDropDependency(Relation sdepRel,
    1124                 :             :                     Oid classId, Oid objectId, int32 objsubId,
    1125                 :             :                     bool drop_subobjects,
    1126                 :             :                     Oid refclassId, Oid refobjId,
    1127                 :             :                     SharedDependencyType deptype)
    1128                 :             : {
    1129                 :             :     ScanKeyData key[4];
    1130                 :             :     int         nkeys;
    1131                 :             :     SysScanDesc scan;
    1132                 :             :     HeapTuple   tup;
    1133                 :             : 
    1134                 :             :     /* Scan for entries matching the dependent object */
    1135                 :      161144 :     ScanKeyInit(&key[0],
    1136                 :             :                 Anum_pg_shdepend_dbid,
    1137                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
    1138                 :             :                 ObjectIdGetDatum(classIdGetDbId(classId)));
    1139                 :      161144 :     ScanKeyInit(&key[1],
    1140                 :             :                 Anum_pg_shdepend_classid,
    1141                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
    1142                 :             :                 ObjectIdGetDatum(classId));
    1143                 :      161144 :     ScanKeyInit(&key[2],
    1144                 :             :                 Anum_pg_shdepend_objid,
    1145                 :             :                 BTEqualStrategyNumber, F_OIDEQ,
    1146                 :             :                 ObjectIdGetDatum(objectId));
    1147         [ +  + ]:      161144 :     if (drop_subobjects)
    1148                 :      159148 :         nkeys = 3;
    1149                 :             :     else
    1150                 :             :     {
    1151                 :        1996 :         ScanKeyInit(&key[3],
    1152                 :             :                     Anum_pg_shdepend_objsubid,
    1153                 :             :                     BTEqualStrategyNumber, F_INT4EQ,
    1154                 :             :                     Int32GetDatum(objsubId));
    1155                 :        1996 :         nkeys = 4;
    1156                 :             :     }
    1157                 :             : 
    1158                 :      161144 :     scan = systable_beginscan(sdepRel, SharedDependDependerIndexId, true,
    1159                 :             :                               NULL, nkeys, key);
    1160                 :             : 
    1161         [ +  + ]:      166503 :     while (HeapTupleIsValid(tup = systable_getnext(scan)))
    1162                 :             :     {
    1163                 :        5359 :         Form_pg_shdepend shdepForm = (Form_pg_shdepend) GETSTRUCT(tup);
    1164                 :             : 
    1165                 :             :         /* Filter entries according to additional parameters */
    1166   [ +  +  -  + ]:        5359 :         if (OidIsValid(refclassId) && shdepForm->refclassid != refclassId)
    1167                 :           0 :             continue;
    1168   [ +  +  +  + ]:        5359 :         if (OidIsValid(refobjId) && shdepForm->refobjid != refobjId)
    1169                 :         615 :             continue;
    1170         [ +  + ]:        4744 :         if (deptype != SHARED_DEPENDENCY_INVALID &&
    1171         [ +  + ]:         570 :             shdepForm->deptype != deptype)
    1172                 :          28 :             continue;
    1173                 :             : 
    1174                 :             :         /* OK, delete it */
    1175                 :        4716 :         CatalogTupleDelete(sdepRel, &tup->t_self);
    1176                 :             :     }
    1177                 :             : 
    1178                 :      161144 :     systable_endscan(scan);
    1179                 :      161144 : }
    1180                 :             : 
    1181                 :             : /*
    1182                 :             :  * classIdGetDbId
    1183                 :             :  *
    1184                 :             :  * Get the database Id that should be used in pg_shdepend, given the OID
    1185                 :             :  * of the catalog containing the object.  For shared objects, it's 0
    1186                 :             :  * (InvalidOid); for all other objects, it's the current database Id.
    1187                 :             :  */
    1188                 :             : static Oid
    1189                 :      166701 : classIdGetDbId(Oid classId)
    1190                 :             : {
    1191                 :             :     Oid         dbId;
    1192                 :             : 
    1193         [ +  + ]:      166701 :     if (IsSharedRelation(classId))
    1194                 :        1271 :         dbId = InvalidOid;
    1195                 :             :     else
    1196                 :      165430 :         dbId = MyDatabaseId;
    1197                 :             : 
    1198                 :      166701 :     return dbId;
    1199                 :             : }
    1200                 :             : 
    1201                 :             : /*
    1202                 :             :  * shdepLockAndCheckObject
    1203                 :             :  *
    1204                 :             :  * Acquire an AccessShareLock on a shared object and verify that it still
    1205                 :             :  * exists.  This is used when recording a dependency or performing another
    1206                 :             :  * operation that must protect the object against a concurrent DROP.
    1207                 :             :  */
    1208                 :             : void
    1209                 :        6336 : shdepLockAndCheckObject(Oid classId, Oid objectId)
    1210                 :             : {
    1211                 :             :     /* AccessShareLock is sufficient to prevent a concurrent DROP. */
    1212                 :        6336 :     LockSharedObject(classId, objectId, 0, AccessShareLock);
    1213                 :             : 
    1214   [ +  +  +  - ]:        6336 :     switch (classId)
    1215                 :             :     {
    1216                 :        5518 :         case AuthIdRelationId:
    1217         [ -  + ]:        5518 :             if (!SearchSysCacheExists1(AUTHOID, ObjectIdGetDatum(objectId)))
    1218         [ #  # ]:           0 :                 ereport(ERROR,
    1219                 :             :                         (errcode(ERRCODE_UNDEFINED_OBJECT),
    1220                 :             :                          errmsg("role %u was concurrently dropped",
    1221                 :             :                                 objectId)));
    1222                 :        5518 :             break;
    1223                 :             : 
    1224                 :         114 :         case TableSpaceRelationId:
    1225                 :             :             {
    1226                 :             :                 /* For lack of a syscache on pg_tablespace, do this: */
    1227                 :         114 :                 char       *tablespace = get_tablespace_name(objectId);
    1228                 :             : 
    1229         [ +  + ]:         114 :                 if (tablespace == NULL)
    1230         [ +  - ]:           1 :                     ereport(ERROR,
    1231                 :             :                             (errcode(ERRCODE_UNDEFINED_OBJECT),
    1232                 :             :                              errmsg("tablespace %u was concurrently dropped",
    1233                 :             :                                     objectId)));
    1234                 :         113 :                 pfree(tablespace);
    1235                 :         113 :                 break;
    1236                 :             :             }
    1237                 :             : 
    1238                 :         704 :         case DatabaseRelationId:
    1239                 :             :             {
    1240                 :             :                 /* For lack of a syscache on pg_database, do this: */
    1241                 :         704 :                 char       *database = get_database_name(objectId);
    1242                 :             : 
    1243         [ -  + ]:         704 :                 if (database == NULL)
    1244         [ #  # ]:           0 :                     ereport(ERROR,
    1245                 :             :                             (errcode(ERRCODE_UNDEFINED_OBJECT),
    1246                 :             :                              errmsg("database %u was concurrently dropped",
    1247                 :             :                                     objectId)));
    1248                 :         704 :                 pfree(database);
    1249                 :         704 :                 break;
    1250                 :             :             }
    1251                 :             : 
    1252                 :             : 
    1253                 :           0 :         default:
    1254         [ #  # ]:           0 :             elog(ERROR, "unrecognized shared classId: %u", classId);
    1255                 :             :     }
    1256                 :        6335 : }
    1257                 :             : 
    1258                 :             : 
    1259                 :             : /*
    1260                 :             :  * storeObjectDescription
    1261                 :             :  *      Append the description of a dependent object to "descs"
    1262                 :             :  *
    1263                 :             :  * While searching for dependencies of a shared object, we stash the
    1264                 :             :  * descriptions of dependent objects we find in a single string, which we
    1265                 :             :  * later pass to ereport() in the DETAIL field when somebody attempts to
    1266                 :             :  * drop a referenced shared object.
    1267                 :             :  *
    1268                 :             :  * When type is LOCAL_OBJECT or SHARED_OBJECT, we expect object to be the
    1269                 :             :  * dependent object, deptype is the dependency type, and count is not used.
    1270                 :             :  * When type is REMOTE_OBJECT, we expect object to be the database object,
    1271                 :             :  * and count to be nonzero; deptype is not used in this case.
    1272                 :             :  */
    1273                 :             : static void
    1274                 :         376 : storeObjectDescription(StringInfo descs,
    1275                 :             :                        SharedDependencyObjectType type,
    1276                 :             :                        ObjectAddress *object,
    1277                 :             :                        SharedDependencyType deptype,
    1278                 :             :                        int count)
    1279                 :             : {
    1280                 :         376 :     char       *objdesc = getObjectDescription(object, false);
    1281                 :             : 
    1282                 :             :     /*
    1283                 :             :      * An object being dropped concurrently doesn't need to be reported.
    1284                 :             :      */
    1285         [ -  + ]:         376 :     if (objdesc == NULL)
    1286                 :           0 :         return;
    1287                 :             : 
    1288                 :             :     /* separate entries with a newline */
    1289         [ +  + ]:         376 :     if (descs->len != 0)
    1290                 :         194 :         appendStringInfoChar(descs, '\n');
    1291                 :             : 
    1292      [ +  -  - ]:         376 :     switch (type)
    1293                 :             :     {
    1294                 :         376 :         case LOCAL_OBJECT:
    1295                 :             :         case SHARED_OBJECT:
    1296         [ +  + ]:         376 :             if (deptype == SHARED_DEPENDENCY_OWNER)
    1297                 :         162 :                 appendStringInfo(descs, _("owner of %s"), objdesc);
    1298         [ +  + ]:         214 :             else if (deptype == SHARED_DEPENDENCY_ACL)
    1299                 :         180 :                 appendStringInfo(descs, _("privileges for %s"), objdesc);
    1300         [ -  + ]:          34 :             else if (deptype == SHARED_DEPENDENCY_INITACL)
    1301                 :           0 :                 appendStringInfo(descs, _("initial privileges for %s"), objdesc);
    1302         [ +  + ]:          34 :             else if (deptype == SHARED_DEPENDENCY_POLICY)
    1303                 :          16 :                 appendStringInfo(descs, _("target of %s"), objdesc);
    1304         [ +  - ]:          18 :             else if (deptype == SHARED_DEPENDENCY_TABLESPACE)
    1305                 :          18 :                 appendStringInfo(descs, _("tablespace for %s"), objdesc);
    1306                 :             :             else
    1307         [ #  # ]:           0 :                 elog(ERROR, "unrecognized dependency type: %d",
    1308                 :             :                      (int) deptype);
    1309                 :         376 :             break;
    1310                 :             : 
    1311                 :           0 :         case REMOTE_OBJECT:
    1312                 :             :             /* translator: %s will always be "database %s" */
    1313                 :           0 :             appendStringInfo(descs, ngettext("%d object in %s",
    1314                 :             :                                              "%d objects in %s",
    1315                 :             :                                              count),
    1316                 :             :                              count, objdesc);
    1317                 :           0 :             break;
    1318                 :             : 
    1319                 :           0 :         default:
    1320         [ #  # ]:           0 :             elog(ERROR, "unrecognized object type: %d", type);
    1321                 :             :     }
    1322                 :             : 
    1323                 :         376 :     pfree(objdesc);
    1324                 :             : }
    1325                 :             : 
    1326                 :             : 
    1327                 :             : /*
    1328                 :             :  * shdepDropOwned
    1329                 :             :  *
    1330                 :             :  * Drop the objects owned by any one of the given RoleIds.  If a role has
    1331                 :             :  * access to an object, the grant will be removed as well (but the object
    1332                 :             :  * will not, of course).
    1333                 :             :  *
    1334                 :             :  * We can revoke grants immediately while doing the scan, but drops are
    1335                 :             :  * saved up and done all at once with performMultipleDeletions.  This
    1336                 :             :  * is necessary so that we don't get failures from trying to delete
    1337                 :             :  * interdependent objects in the wrong order.
    1338                 :             :  */
    1339                 :             : void
    1340                 :         101 : shdepDropOwned(List *roleids, DropBehavior behavior)
    1341                 :             : {
    1342                 :             :     Relation    sdepRel;
    1343                 :             :     ListCell   *cell;
    1344                 :             :     ObjectAddresses *deleteobjs;
    1345                 :             : 
    1346                 :         101 :     deleteobjs = new_object_addresses();
    1347                 :             : 
    1348                 :             :     /*
    1349                 :             :      * We don't need this strong a lock here, but we'll call routines that
    1350                 :             :      * acquire RowExclusiveLock.  Better get that right now to avoid potential
    1351                 :             :      * deadlock failures.
    1352                 :             :      */
    1353                 :         101 :     sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
    1354                 :             : 
    1355                 :             :     /*
    1356                 :             :      * For each role, find the dependent objects and drop them using the
    1357                 :             :      * regular (non-shared) dependency management.
    1358                 :             :      */
    1359   [ +  -  +  +  :         216 :     foreach(cell, roleids)
                   +  + ]
    1360                 :             :     {
    1361                 :         115 :         Oid         roleid = lfirst_oid(cell);
    1362                 :             :         ScanKeyData key[2];
    1363                 :             :         SysScanDesc scan;
    1364                 :             :         HeapTuple   tuple;
    1365                 :             : 
    1366                 :             :         /* Doesn't work for pinned objects */
    1367         [ -  + ]:         115 :         if (IsPinnedObject(AuthIdRelationId, roleid))
    1368                 :             :         {
    1369                 :             :             ObjectAddress obj;
    1370                 :             : 
    1371                 :           0 :             obj.classId = AuthIdRelationId;
    1372                 :           0 :             obj.objectId = roleid;
    1373                 :           0 :             obj.objectSubId = 0;
    1374                 :             : 
    1375         [ #  # ]:           0 :             ereport(ERROR,
    1376                 :             :                     (errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
    1377                 :             :                      errmsg("cannot drop objects owned by %s because they are "
    1378                 :             :                             "required by the database system",
    1379                 :             :                             getObjectDescription(&obj, false))));
    1380                 :             :         }
    1381                 :             : 
    1382                 :         115 :         ScanKeyInit(&key[0],
    1383                 :             :                     Anum_pg_shdepend_refclassid,
    1384                 :             :                     BTEqualStrategyNumber, F_OIDEQ,
    1385                 :             :                     ObjectIdGetDatum(AuthIdRelationId));
    1386                 :         115 :         ScanKeyInit(&key[1],
    1387                 :             :                     Anum_pg_shdepend_refobjid,
    1388                 :             :                     BTEqualStrategyNumber, F_OIDEQ,
    1389                 :             :                     ObjectIdGetDatum(roleid));
    1390                 :             : 
    1391                 :         115 :         scan = systable_beginscan(sdepRel, SharedDependReferenceIndexId, true,
    1392                 :             :                                   NULL, 2, key);
    1393                 :             : 
    1394         [ +  + ]:         594 :         while ((tuple = systable_getnext(scan)) != NULL)
    1395                 :             :         {
    1396                 :         479 :             Form_pg_shdepend sdepForm = (Form_pg_shdepend) GETSTRUCT(tuple);
    1397                 :             :             ObjectAddress obj;
    1398                 :             : 
    1399                 :             :             /*
    1400                 :             :              * We only operate on shared objects and objects in the current
    1401                 :             :              * database
    1402                 :             :              */
    1403         [ +  + ]:         479 :             if (sdepForm->dbid != MyDatabaseId &&
    1404         [ +  + ]:          42 :                 sdepForm->dbid != InvalidOid)
    1405                 :          12 :                 continue;
    1406                 :             : 
    1407   [ -  +  +  +  :         467 :             switch (sdepForm->deptype)
                   +  - ]
    1408                 :             :             {
    1409                 :             :                     /* Shouldn't happen */
    1410                 :           0 :                 case SHARED_DEPENDENCY_INVALID:
    1411         [ #  # ]:           0 :                     elog(ERROR, "unexpected dependency type");
    1412                 :             :                     break;
    1413                 :          33 :                 case SHARED_DEPENDENCY_POLICY:
    1414                 :             : 
    1415                 :             :                     /*
    1416                 :             :                      * Try to remove role from policy; if that would leave the
    1417                 :             :                      * policy with no roles, remove the policy.
    1418                 :             :                      */
    1419         [ +  + ]:          33 :                     if (!RemoveRoleFromObjectPolicy(roleid,
    1420                 :             :                                                     sdepForm->classid,
    1421                 :             :                                                     sdepForm->objid))
    1422                 :             :                     {
    1423                 :          13 :                         obj.classId = sdepForm->classid;
    1424                 :          13 :                         obj.objectId = sdepForm->objid;
    1425                 :          13 :                         obj.objectSubId = sdepForm->objsubid;
    1426                 :             : 
    1427                 :             :                         /*
    1428                 :             :                          * Acquire lock on object, then verify this dependency
    1429                 :             :                          * is still relevant.  If not, the object might have
    1430                 :             :                          * been dropped or the policy modified.  Ignore the
    1431                 :             :                          * object in that case.
    1432                 :             :                          */
    1433                 :          13 :                         AcquireDeletionLock(&obj, 0);
    1434         [ -  + ]:          13 :                         if (!systable_recheck_tuple(scan, tuple))
    1435                 :             :                         {
    1436                 :           0 :                             ReleaseDeletionLock(&obj);
    1437                 :           0 :                             break;
    1438                 :             :                         }
    1439                 :          13 :                         add_exact_object_address(&obj, deleteobjs);
    1440                 :             :                     }
    1441                 :          33 :                     break;
    1442                 :         171 :                 case SHARED_DEPENDENCY_ACL:
    1443                 :             : 
    1444                 :             :                     /*
    1445                 :             :                      * Dependencies on role grants are recorded using
    1446                 :             :                      * SHARED_DEPENDENCY_ACL, but unlike a regular ACL list
    1447                 :             :                      * which stores all permissions for a particular object in
    1448                 :             :                      * a single ACL array, there's a separate catalog row for
    1449                 :             :                      * each grant - so removing the grant just means removing
    1450                 :             :                      * the entire row.
    1451                 :             :                      */
    1452         [ +  + ]:         171 :                     if (sdepForm->classid != AuthMemRelationId)
    1453                 :             :                     {
    1454                 :             :                         /*
    1455                 :             :                          * Lock tablespaces before updating their catalog
    1456                 :             :                          * tuple.
    1457                 :             :                          */
    1458         [ +  + ]:         165 :                         if (sdepForm->classid == TableSpaceRelationId)
    1459                 :             :                         {
    1460                 :           4 :                             LockSharedObject(sdepForm->classid,
    1461                 :             :                                              sdepForm->objid, 0,
    1462                 :             :                                              AccessShareLock);
    1463         [ -  + ]:           4 :                             if (!systable_recheck_tuple(scan, tuple))
    1464                 :             :                             {
    1465                 :           0 :                                 UnlockSharedObject(sdepForm->classid,
    1466                 :             :                                                    sdepForm->objid, 0,
    1467                 :             :                                                    AccessShareLock);
    1468                 :           0 :                                 break;
    1469                 :             :                             }
    1470                 :             :                         }
    1471                 :         165 :                         RemoveRoleFromObjectACL(roleid,
    1472                 :             :                                                 sdepForm->classid,
    1473                 :             :                                                 sdepForm->objid);
    1474                 :         165 :                         break;
    1475                 :             :                     }
    1476                 :             :                     pg_fallthrough;
    1477                 :             : 
    1478                 :             :                 case SHARED_DEPENDENCY_OWNER:
    1479                 :             : 
    1480                 :             :                     /*
    1481                 :             :                      * Save it for deletion below, if it's a local object or a
    1482                 :             :                      * role grant. Other shared objects, such as databases,
    1483                 :             :                      * should not be removed here.
    1484                 :             :                      */
    1485         [ +  + ]:         255 :                     if (sdepForm->dbid == MyDatabaseId ||
    1486         [ +  + ]:           7 :                         sdepForm->classid == AuthMemRelationId)
    1487                 :             :                     {
    1488                 :         254 :                         obj.classId = sdepForm->classid;
    1489                 :         254 :                         obj.objectId = sdepForm->objid;
    1490                 :         254 :                         obj.objectSubId = sdepForm->objsubid;
    1491                 :             :                         /* as above */
    1492                 :         254 :                         AcquireDeletionLock(&obj, 0);
    1493         [ +  + ]:         254 :                         if (!systable_recheck_tuple(scan, tuple))
    1494                 :             :                         {
    1495                 :           1 :                             ReleaseDeletionLock(&obj);
    1496                 :           1 :                             break;
    1497                 :             :                         }
    1498                 :         253 :                         add_exact_object_address(&obj, deleteobjs);
    1499                 :             :                     }
    1500                 :         254 :                     break;
    1501                 :          14 :                 case SHARED_DEPENDENCY_INITACL:
    1502                 :             : 
    1503                 :             :                     /*
    1504                 :             :                      * Any mentions of the role that remain in pg_init_privs
    1505                 :             :                      * entries are just dropped.  This is the same policy as
    1506                 :             :                      * we apply to regular ACLs.
    1507                 :             :                      */
    1508                 :             : 
    1509                 :             :                     /* Shouldn't see a role grant here */
    1510                 :             :                     Assert(sdepForm->classid != AuthMemRelationId);
    1511                 :          14 :                     RemoveRoleFromInitPriv(roleid,
    1512                 :             :                                            sdepForm->classid,
    1513                 :             :                                            sdepForm->objid,
    1514                 :             :                                            sdepForm->objsubid);
    1515                 :          14 :                     break;
    1516                 :             :             }
    1517                 :             :         }
    1518                 :             : 
    1519                 :         115 :         systable_endscan(scan);
    1520                 :             :     }
    1521                 :             : 
    1522                 :             :     /*
    1523                 :             :      * For stability of deletion-report ordering, sort the objects into
    1524                 :             :      * approximate reverse creation order before deletion.  (This might also
    1525                 :             :      * make the deletion go a bit faster, since there's less chance of having
    1526                 :             :      * to rearrange the objects due to dependencies.)
    1527                 :             :      */
    1528                 :         101 :     sort_object_addresses(deleteobjs);
    1529                 :             : 
    1530                 :             :     /* the dependency mechanism does the actual work */
    1531                 :         101 :     performMultipleDeletions(deleteobjs, behavior, 0);
    1532                 :             : 
    1533                 :          97 :     table_close(sdepRel, RowExclusiveLock);
    1534                 :             : 
    1535                 :          97 :     free_object_addresses(deleteobjs);
    1536                 :          97 : }
    1537                 :             : 
    1538                 :             : /*
    1539                 :             :  * shdepReassignOwned
    1540                 :             :  *
    1541                 :             :  * Change the owner of objects owned by any of the roles in roleids to
    1542                 :             :  * newrole.  Grants are not touched.
    1543                 :             :  *
    1544                 :             :  * This must check the same GetUserId() privileges as individual ALTER
    1545                 :             :  * ... OWNER TO commands.
    1546                 :             :  *
    1547                 :             :  * This should also check the same newrole privileges as ALTER ... OWNER TO
    1548                 :             :  * commands.  XXX Today, unlike ALTER TABLE and ALTER TYPE, this doesn't
    1549                 :             :  * require newrole to have CREATE privilege on the containing schema.
    1550                 :             :  * Long-term, remove the newrole privilege checks from ALTER ... OWNER TO or
    1551                 :             :  * cover them here.  The newrole checks are intended to enforce that altering
    1552                 :             :  * the owner doesn't do anything you couldn't do by dropping and recreating
    1553                 :             :  * the object.  Failing to achieve that goal is a bug but not a vulnerability.
    1554                 :             :  *
    1555                 :             :  * There's also an ambiguity in the "same newrole privileges" goal.  When
    1556                 :             :  * running more than one ALTER ... OWNER TO, order of commands can affect
    1557                 :             :  * success of privilege checks.  For example, ALTER SCHEMA ... OWNER TO can
    1558                 :             :  * change the success or failure of privilege checks in future ALTER FUNCTION
    1559                 :             :  * ... OWNER.  ALTER DATABASE ... OWNER TO can change future ALTER PUBLICATION
    1560                 :             :  * ... OWNER.  This operation runs ownership changes in an unspecified order,
    1561                 :             :  * currently tied to catalog tuple physical order.
    1562                 :             :  */
    1563                 :             : void
    1564                 :          39 : shdepReassignOwned(List *roleids, Oid newrole)
    1565                 :             : {
    1566                 :             :     Relation    sdepRel;
    1567                 :             :     ListCell   *cell;
    1568                 :             : 
    1569                 :             :     /*
    1570                 :             :      * We don't need this strong a lock here, but we'll call routines that
    1571                 :             :      * acquire RowExclusiveLock.  Better get that right now to avoid potential
    1572                 :             :      * deadlock problems.
    1573                 :             :      */
    1574                 :          39 :     sdepRel = table_open(SharedDependRelationId, RowExclusiveLock);
    1575                 :             : 
    1576   [ +  -  +  +  :          74 :     foreach(cell, roleids)
                   +  + ]
    1577                 :             :     {
    1578                 :             :         SysScanDesc scan;
    1579                 :             :         ScanKeyData key[2];
    1580                 :             :         HeapTuple   tuple;
    1581                 :          39 :         Oid         roleid = lfirst_oid(cell);
    1582                 :             : 
    1583                 :             :         /* Refuse to work on pinned roles */
    1584         [ -  + ]:          39 :         if (IsPinnedObject(AuthIdRelationId, roleid))
    1585                 :             :         {
    1586                 :             :             ObjectAddress obj;
    1587                 :             : 
    1588                 :           0 :             obj.classId = AuthIdRelationId;
    1589                 :           0 :             obj.objectId = roleid;
    1590                 :           0 :             obj.objectSubId = 0;
    1591                 :             : 
    1592         [ #  # ]:           0 :             ereport(ERROR,
    1593                 :             :                     (errcode(ERRCODE_DEPENDENT_OBJECTS_STILL_EXIST),
    1594                 :             :                      errmsg("cannot reassign ownership of objects owned by %s because they are required by the database system",
    1595                 :             :                             getObjectDescription(&obj, false))));
    1596                 :             : 
    1597                 :             :             /*
    1598                 :             :              * There's no need to tell the whole truth, which is that we
    1599                 :             :              * didn't track these dependencies at all ...
    1600                 :             :              */
    1601                 :             :         }
    1602                 :             : 
    1603                 :          39 :         ScanKeyInit(&key[0],
    1604                 :             :                     Anum_pg_shdepend_refclassid,
    1605                 :             :                     BTEqualStrategyNumber, F_OIDEQ,
    1606                 :             :                     ObjectIdGetDatum(AuthIdRelationId));
    1607                 :          39 :         ScanKeyInit(&key[1],
    1608                 :             :                     Anum_pg_shdepend_refobjid,
    1609                 :             :                     BTEqualStrategyNumber, F_OIDEQ,
    1610                 :             :                     ObjectIdGetDatum(roleid));
    1611                 :             : 
    1612                 :          39 :         scan = systable_beginscan(sdepRel, SharedDependReferenceIndexId, true,
    1613                 :             :                                   NULL, 2, key);
    1614                 :             : 
    1615         [ +  + ]:         175 :         while ((tuple = systable_getnext(scan)) != NULL)
    1616                 :             :         {
    1617                 :         140 :             Form_pg_shdepend sdepForm = (Form_pg_shdepend) GETSTRUCT(tuple);
    1618                 :             :             MemoryContext cxt,
    1619                 :             :                         oldcxt;
    1620                 :             : 
    1621                 :             :             /*
    1622                 :             :              * We only operate on shared objects and objects in the current
    1623                 :             :              * database
    1624                 :             :              */
    1625         [ +  + ]:         140 :             if (sdepForm->dbid != MyDatabaseId &&
    1626         [ +  + ]:          44 :                 sdepForm->dbid != InvalidOid)
    1627                 :           2 :                 continue;
    1628                 :             : 
    1629                 :             :             /*
    1630                 :             :              * The various DDL routines called here tend to leak memory in
    1631                 :             :              * CurrentMemoryContext.  That's not a problem when they're only
    1632                 :             :              * called once per command; but in this usage where we might be
    1633                 :             :              * touching many objects, it can amount to a serious memory leak.
    1634                 :             :              * Fix that by running each call in a short-lived context.
    1635                 :             :              */
    1636                 :         138 :             cxt = AllocSetContextCreate(CurrentMemoryContext,
    1637                 :             :                                         "shdepReassignOwned",
    1638                 :             :                                         ALLOCSET_DEFAULT_SIZES);
    1639                 :         138 :             oldcxt = MemoryContextSwitchTo(cxt);
    1640                 :             : 
    1641                 :             :             /* Perform the appropriate processing */
    1642   [ +  +  +  - ]:         138 :             switch (sdepForm->deptype)
    1643                 :             :             {
    1644                 :          89 :                 case SHARED_DEPENDENCY_OWNER:
    1645                 :             :                     /* Lock tablespaces before updating their catalog tuple. */
    1646         [ +  + ]:          89 :                     if (sdepForm->classid == TableSpaceRelationId)
    1647                 :             :                     {
    1648                 :           4 :                         LockSharedObject(sdepForm->classid,
    1649                 :             :                                          sdepForm->objid, 0,
    1650                 :             :                                          AccessShareLock);
    1651         [ -  + ]:           4 :                         if (!systable_recheck_tuple(scan, tuple))
    1652                 :             :                         {
    1653                 :           0 :                             UnlockSharedObject(sdepForm->classid,
    1654                 :             :                                                sdepForm->objid, 0,
    1655                 :             :                                                AccessShareLock);
    1656                 :           0 :                             break;
    1657                 :             :                         }
    1658                 :             :                     }
    1659                 :          89 :                     shdepReassignOwned_Owner(sdepForm, roleid, newrole);
    1660                 :          85 :                     break;
    1661                 :          12 :                 case SHARED_DEPENDENCY_INITACL:
    1662                 :          12 :                     shdepReassignOwned_InitAcl(sdepForm, roleid, newrole);
    1663                 :          12 :                     break;
    1664                 :          37 :                 case SHARED_DEPENDENCY_ACL:
    1665                 :             :                 case SHARED_DEPENDENCY_POLICY:
    1666                 :             :                 case SHARED_DEPENDENCY_TABLESPACE:
    1667                 :             :                     /* Nothing to do for these entry types */
    1668                 :          37 :                     break;
    1669                 :           0 :                 default:
    1670         [ #  # ]:           0 :                     elog(ERROR, "unrecognized dependency type: %d",
    1671                 :             :                          (int) sdepForm->deptype);
    1672                 :             :                     break;
    1673                 :             :             }
    1674                 :             : 
    1675                 :             :             /* Clean up */
    1676                 :         134 :             MemoryContextSwitchTo(oldcxt);
    1677                 :         134 :             MemoryContextDelete(cxt);
    1678                 :             : 
    1679                 :             :             /* Make sure the next iteration will see my changes */
    1680                 :         134 :             CommandCounterIncrement();
    1681                 :             :         }
    1682                 :             : 
    1683                 :          35 :         systable_endscan(scan);
    1684                 :             :     }
    1685                 :             : 
    1686                 :          35 :     table_close(sdepRel, RowExclusiveLock);
    1687                 :          35 : }
    1688                 :             : 
    1689                 :             : /*
    1690                 :             :  * shdepReassignOwned_Owner
    1691                 :             :  *
    1692                 :             :  * shdepReassignOwned's processing of SHARED_DEPENDENCY_OWNER entries
    1693                 :             :  */
    1694                 :             : static void
    1695                 :          89 : shdepReassignOwned_Owner(Form_pg_shdepend sdepForm, Oid oldrole, Oid newrole)
    1696                 :             : {
    1697                 :             :     /* mirror AlterDatabaseOwner() privilege check */
    1698   [ +  +  +  - ]:          89 :     if (sdepForm->classid == DatabaseRelationId && oldrole != newrole &&
    1699         [ +  + ]:          12 :         !have_createdb_privilege())
    1700         [ +  - ]:           4 :         ereport(ERROR,
    1701                 :             :                 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
    1702                 :             :                  errmsg("permission denied to change owner of database")));
    1703                 :             : 
    1704                 :             :     /* Issue the appropriate ALTER OWNER call */
    1705   [ +  +  +  +  :          85 :     switch (sdepForm->classid)
          +  +  -  -  -  
                +  +  - ]
    1706                 :             :     {
    1707                 :          13 :         case TypeRelationId:
    1708                 :          13 :             AlterTypeOwner_oid(sdepForm->objid, newrole, true);
    1709                 :          13 :             break;
    1710                 :             : 
    1711                 :           5 :         case NamespaceRelationId:
    1712                 :           5 :             AlterSchemaOwner_oid(sdepForm->objid, newrole);
    1713                 :           5 :             break;
    1714                 :             : 
    1715                 :          24 :         case RelationRelationId:
    1716                 :             : 
    1717                 :             :             /*
    1718                 :             :              * Pass recursing = true so that we don't fail on indexes, owned
    1719                 :             :              * sequences, etc when we happen to visit them before their parent
    1720                 :             :              * table.
    1721                 :             :              */
    1722                 :          24 :             ATExecChangeOwner(sdepForm->objid, newrole, true, AccessExclusiveLock);
    1723                 :          24 :             break;
    1724                 :             : 
    1725                 :           4 :         case DefaultAclRelationId:
    1726                 :             : 
    1727                 :             :             /*
    1728                 :             :              * Ignore default ACLs; they should be handled by DROP OWNED, not
    1729                 :             :              * REASSIGN OWNED.
    1730                 :             :              */
    1731                 :           4 :             break;
    1732                 :             : 
    1733                 :           9 :         case UserMappingRelationId:
    1734                 :             :             /* ditto */
    1735                 :           9 :             break;
    1736                 :             : 
    1737                 :           8 :         case ForeignServerRelationId:
    1738                 :           8 :             AlterForeignServerOwner_oid(sdepForm->objid, newrole);
    1739                 :           8 :             break;
    1740                 :             : 
    1741                 :           0 :         case ForeignDataWrapperRelationId:
    1742                 :           0 :             AlterForeignDataWrapperOwner_oid(sdepForm->objid, newrole);
    1743                 :           0 :             break;
    1744                 :             : 
    1745                 :           0 :         case EventTriggerRelationId:
    1746                 :           0 :             AlterEventTriggerOwner_oid(sdepForm->objid, newrole);
    1747                 :           0 :             break;
    1748                 :             : 
    1749                 :           0 :         case PublicationRelationId:
    1750                 :           0 :             AlterPublicationOwner_oid(sdepForm->objid, newrole);
    1751                 :           0 :             break;
    1752                 :             : 
    1753                 :           2 :         case SubscriptionRelationId:
    1754                 :           2 :             AlterSubscriptionOwner_oid(sdepForm->objid, newrole);
    1755                 :           2 :             break;
    1756                 :             : 
    1757                 :             :             /* Generic alter owner cases */
    1758                 :          20 :         case CollationRelationId:
    1759                 :             :         case ConversionRelationId:
    1760                 :             :         case OperatorRelationId:
    1761                 :             :         case ProcedureRelationId:
    1762                 :             :         case LanguageRelationId:
    1763                 :             :         case LargeObjectRelationId:
    1764                 :             :         case OperatorFamilyRelationId:
    1765                 :             :         case OperatorClassRelationId:
    1766                 :             :         case ExtensionRelationId:
    1767                 :             :         case StatisticExtRelationId:
    1768                 :             :         case TableSpaceRelationId:
    1769                 :             :         case DatabaseRelationId:
    1770                 :             :         case TSConfigRelationId:
    1771                 :             :         case TSDictionaryRelationId:
    1772                 :          20 :             AlterObjectOwner_internal(sdepForm->classid,
    1773                 :             :                                       sdepForm->objid,
    1774                 :             :                                       newrole);
    1775                 :          20 :             break;
    1776                 :             : 
    1777                 :           0 :         default:
    1778         [ #  # ]:           0 :             elog(ERROR, "unexpected classid %u", sdepForm->classid);
    1779                 :             :             break;
    1780                 :             :     }
    1781                 :          85 : }
    1782                 :             : 
    1783                 :             : /*
    1784                 :             :  * shdepReassignOwned_InitAcl
    1785                 :             :  *
    1786                 :             :  * shdepReassignOwned's processing of SHARED_DEPENDENCY_INITACL entries
    1787                 :             :  */
    1788                 :             : static void
    1789                 :          12 : shdepReassignOwned_InitAcl(Form_pg_shdepend sdepForm, Oid oldrole, Oid newrole)
    1790                 :             : {
    1791                 :             :     /*
    1792                 :             :      * Currently, REASSIGN OWNED replaces mentions of oldrole with newrole in
    1793                 :             :      * pg_init_privs entries, just as it does in the object's regular ACL.
    1794                 :             :      * This is less than ideal, since pg_init_privs ought to retain a
    1795                 :             :      * historical record of the situation at the end of CREATE EXTENSION.
    1796                 :             :      * However, there are two big stumbling blocks to doing something
    1797                 :             :      * different:
    1798                 :             :      *
    1799                 :             :      * 1. If we don't replace the references, what is to happen if the old
    1800                 :             :      * role gets dropped?  (DROP OWNED's current answer is to just delete the
    1801                 :             :      * pg_init_privs entry, which is surely ahistorical.)
    1802                 :             :      *
    1803                 :             :      * 2. It's unlikely that pg_dump will cope nicely with pg_init_privs
    1804                 :             :      * entries that are based on a different owner than the object now has ---
    1805                 :             :      * the more so given that pg_init_privs doesn't record the original owner
    1806                 :             :      * explicitly.  (This problem actually exists anyway given that a bare
    1807                 :             :      * ALTER OWNER won't update pg_init_privs, but we don't need REASSIGN
    1808                 :             :      * OWNED making it worse.)
    1809                 :             :      */
    1810                 :          12 :     ReplaceRoleInInitPriv(oldrole, newrole,
    1811                 :             :                           sdepForm->classid,
    1812                 :             :                           sdepForm->objid,
    1813                 :             :                           sdepForm->objsubid);
    1814                 :          12 : }
        

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