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schemacmds.h File Reference
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Functions

Oid CreateSchemaCommand (CreateSchemaStmt *parsetree, const char *queryString, int stmt_location, int stmt_len)
 
void RemoveSchemaById (Oid schemaOid)
 
ObjectAddress RenameSchema (const char *oldname, const char *newname)
 
ObjectAddress AlterSchemaOwner (const char *name, Oid newOwnerId)
 
void AlterSchemaOwner_oid (Oid schemaOid, Oid newOwnerId)
 

Function Documentation

◆ AlterSchemaOwner()

ObjectAddress AlterSchemaOwner ( const char *  name,
Oid  newOwnerId 
)

Definition at line 323 of file schemacmds.c.

References AlterSchemaOwner_internal(), CStringGetDatum, ereport, errcode(), errmsg(), ERROR, GETSTRUCT, HeapTupleIsValid, NAMESPACENAME, ObjectAddressSet, ReleaseSysCache(), RowExclusiveLock, SearchSysCache1(), table_close(), and table_open().

Referenced by ExecAlterOwnerStmt().

324 {
325  Oid nspOid;
326  HeapTuple tup;
327  Relation rel;
328  ObjectAddress address;
329  Form_pg_namespace nspform;
330 
331  rel = table_open(NamespaceRelationId, RowExclusiveLock);
332 
334  if (!HeapTupleIsValid(tup))
335  ereport(ERROR,
336  (errcode(ERRCODE_UNDEFINED_SCHEMA),
337  errmsg("schema \"%s\" does not exist", name)));
338 
339  nspform = (Form_pg_namespace) GETSTRUCT(tup);
340  nspOid = nspform->oid;
341 
342  AlterSchemaOwner_internal(tup, rel, newOwnerId);
343 
344  ObjectAddressSet(address, NamespaceRelationId, nspOid);
345 
346  ReleaseSysCache(tup);
347 
349 
350  return address;
351 }
static void AlterSchemaOwner_internal(HeapTuple tup, Relation rel, Oid newOwnerId)
Definition: schemacmds.c:354
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
#define GETSTRUCT(TUP)
Definition: htup_details.h:655
FormData_pg_namespace * Form_pg_namespace
Definition: pg_namespace.h:51
int errcode(int sqlerrcode)
Definition: elog.c:570
unsigned int Oid
Definition: postgres_ext.h:31
#define ERROR
Definition: elog.h:43
#define RowExclusiveLock
Definition: lockdefs.h:38
#define CStringGetDatum(X)
Definition: postgres.h:578
#define ereport(elevel, rest)
Definition: elog.h:141
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1124
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1172
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
const char * name
Definition: encode.c:521
#define ObjectAddressSet(addr, class_id, object_id)
Definition: objectaddress.h:40
int errmsg(const char *fmt,...)
Definition: elog.c:784
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39

◆ AlterSchemaOwner_oid()

void AlterSchemaOwner_oid ( Oid  schemaOid,
Oid  newOwnerId 
)

Definition at line 300 of file schemacmds.c.

References AlterSchemaOwner_internal(), elog, ERROR, HeapTupleIsValid, NAMESPACEOID, ObjectIdGetDatum, ReleaseSysCache(), RowExclusiveLock, SearchSysCache1(), table_close(), and table_open().

Referenced by shdepReassignOwned().

301 {
302  HeapTuple tup;
303  Relation rel;
304 
305  rel = table_open(NamespaceRelationId, RowExclusiveLock);
306 
308  if (!HeapTupleIsValid(tup))
309  elog(ERROR, "cache lookup failed for schema %u", oid);
310 
311  AlterSchemaOwner_internal(tup, rel, newOwnerId);
312 
313  ReleaseSysCache(tup);
314 
316 }
static void AlterSchemaOwner_internal(HeapTuple tup, Relation rel, Oid newOwnerId)
Definition: schemacmds.c:354
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
#define ObjectIdGetDatum(X)
Definition: postgres.h:507
#define ERROR
Definition: elog.h:43
#define RowExclusiveLock
Definition: lockdefs.h:38
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1124
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1172
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
#define elog(elevel,...)
Definition: elog.h:226
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39

◆ CreateSchemaCommand()

Oid CreateSchemaCommand ( CreateSchemaStmt parsetree,
const char *  queryString,
int  stmt_location,
int  stmt_len 
)

Definition at line 51 of file schemacmds.c.

References ACL_CREATE, aclcheck_error(), ACLCHECK_OK, allowSystemTableMods, AUTHOID, CreateSchemaStmt::authrole, PlannedStmt::canSetTag, check_is_member_of_role(), CMD_UTILITY, CommandCounterIncrement(), PlannedStmt::commandType, CurrentMemoryContext, elog, ereport, errcode(), errdetail(), errmsg(), ERROR, EventTriggerCollectSimpleCommand(), get_database_name(), get_rolespec_oid(), GetOverrideSearchPath(), GETSTRUCT, GetUserIdAndSecContext(), HeapTupleIsValid, CreateSchemaStmt::if_not_exists, InvalidObjectAddress, InvalidOid, IsReservedName(), lcons_oid(), lfirst, makeNode, MyDatabaseId, NamespaceCreate(), NAMESPACENAME, NameStr, None_Receiver, NOTICE, OBJECT_DATABASE, ObjectAddressSet, ObjectIdGetDatum, pg_database_aclcheck(), PointerGetDatum, PopOverrideSearchPath(), PROCESS_UTILITY_SUBCOMMAND, ProcessUtility(), pstrdup(), PushOverrideSearchPath(), ReleaseSysCache(), rolname, CreateSchemaStmt::schemaname, OverrideSearchPath::schemas, SearchSysCache1(), SearchSysCacheExists1, SECURITY_LOCAL_USERID_CHANGE, SetUserIdAndSecContext(), PlannedStmt::stmt_len, PlannedStmt::stmt_location, transformCreateSchemaStmt(), and PlannedStmt::utilityStmt.

Referenced by CreateExtensionInternal(), and ProcessUtilitySlow().

53 {
54  const char *schemaName = stmt->schemaname;
55  Oid namespaceId;
56  OverrideSearchPath *overridePath;
57  List *parsetree_list;
58  ListCell *parsetree_item;
59  Oid owner_uid;
60  Oid saved_uid;
61  int save_sec_context;
62  AclResult aclresult;
63  ObjectAddress address;
64 
65  GetUserIdAndSecContext(&saved_uid, &save_sec_context);
66 
67  /*
68  * Who is supposed to own the new schema?
69  */
70  if (stmt->authrole)
71  owner_uid = get_rolespec_oid(stmt->authrole, false);
72  else
73  owner_uid = saved_uid;
74 
75  /* fill schema name with the user name if not specified */
76  if (!schemaName)
77  {
78  HeapTuple tuple;
79 
80  tuple = SearchSysCache1(AUTHOID, ObjectIdGetDatum(owner_uid));
81  if (!HeapTupleIsValid(tuple))
82  elog(ERROR, "cache lookup failed for role %u", owner_uid);
83  schemaName =
85  ReleaseSysCache(tuple);
86  }
87 
88  /*
89  * To create a schema, must have schema-create privilege on the current
90  * database and must be able to become the target role (this does not
91  * imply that the target role itself must have create-schema privilege).
92  * The latter provision guards against "giveaway" attacks. Note that a
93  * superuser will always have both of these privileges a fortiori.
94  */
95  aclresult = pg_database_aclcheck(MyDatabaseId, saved_uid, ACL_CREATE);
96  if (aclresult != ACLCHECK_OK)
99 
100  check_is_member_of_role(saved_uid, owner_uid);
101 
102  /* Additional check to protect reserved schema names */
103  if (!allowSystemTableMods && IsReservedName(schemaName))
104  ereport(ERROR,
105  (errcode(ERRCODE_RESERVED_NAME),
106  errmsg("unacceptable schema name \"%s\"", schemaName),
107  errdetail("The prefix \"pg_\" is reserved for system schemas.")));
108 
109  /*
110  * If if_not_exists was given and the schema already exists, bail out.
111  * (Note: we needn't check this when not if_not_exists, because
112  * NamespaceCreate will complain anyway.) We could do this before making
113  * the permissions checks, but since CREATE TABLE IF NOT EXISTS makes its
114  * creation-permission check first, we do likewise.
115  */
116  if (stmt->if_not_exists &&
118  {
119  ereport(NOTICE,
120  (errcode(ERRCODE_DUPLICATE_SCHEMA),
121  errmsg("schema \"%s\" already exists, skipping",
122  schemaName)));
123  return InvalidOid;
124  }
125 
126  /*
127  * If the requested authorization is different from the current user,
128  * temporarily set the current user so that the object(s) will be created
129  * with the correct ownership.
130  *
131  * (The setting will be restored at the end of this routine, or in case of
132  * error, transaction abort will clean things up.)
133  */
134  if (saved_uid != owner_uid)
135  SetUserIdAndSecContext(owner_uid,
136  save_sec_context | SECURITY_LOCAL_USERID_CHANGE);
137 
138  /* Create the schema's namespace */
139  namespaceId = NamespaceCreate(schemaName, owner_uid, false);
140 
141  /* Advance cmd counter to make the namespace visible */
143 
144  /*
145  * Temporarily make the new namespace be the front of the search path, as
146  * well as the default creation target namespace. This will be undone at
147  * the end of this routine, or upon error.
148  */
150  overridePath->schemas = lcons_oid(namespaceId, overridePath->schemas);
151  /* XXX should we clear overridePath->useTemp? */
152  PushOverrideSearchPath(overridePath);
153 
154  /*
155  * Report the new schema to possibly interested event triggers. Note we
156  * must do this here and not in ProcessUtilitySlow because otherwise the
157  * objects created below are reported before the schema, which would be
158  * wrong.
159  */
160  ObjectAddressSet(address, NamespaceRelationId, namespaceId);
162  (Node *) stmt);
163 
164  /*
165  * Examine the list of commands embedded in the CREATE SCHEMA command, and
166  * reorganize them into a sequentially executable order with no forward
167  * references. Note that the result is still a list of raw parsetrees ---
168  * we cannot, in general, run parse analysis on one statement until we
169  * have actually executed the prior ones.
170  */
171  parsetree_list = transformCreateSchemaStmt(stmt);
172 
173  /*
174  * Execute each command contained in the CREATE SCHEMA. Since the grammar
175  * allows only utility commands in CREATE SCHEMA, there is no need to pass
176  * them through parse_analyze() or the rewriter; we can just hand them
177  * straight to ProcessUtility.
178  */
179  foreach(parsetree_item, parsetree_list)
180  {
181  Node *stmt = (Node *) lfirst(parsetree_item);
182  PlannedStmt *wrapper;
183 
184  /* need to make a wrapper PlannedStmt */
185  wrapper = makeNode(PlannedStmt);
186  wrapper->commandType = CMD_UTILITY;
187  wrapper->canSetTag = false;
188  wrapper->utilityStmt = stmt;
189  wrapper->stmt_location = stmt_location;
190  wrapper->stmt_len = stmt_len;
191 
192  /* do this step */
193  ProcessUtility(wrapper,
194  queryString,
196  NULL,
197  NULL,
199  NULL);
200 
201  /* make sure later steps can see the object created here */
203  }
204 
205  /* Reset search path to normal state */
207 
208  /* Reset current user and security context */
209  SetUserIdAndSecContext(saved_uid, save_sec_context);
210 
211  return namespaceId;
212 }
#define GETSTRUCT(TUP)
Definition: htup_details.h:655
void SetUserIdAndSecContext(Oid userid, int sec_context)
Definition: miscinit.c:492
NameData rolname
Definition: pg_authid.h:34
#define PointerGetDatum(X)
Definition: postgres.h:556
char * pstrdup(const char *in)
Definition: mcxt.c:1161
void PushOverrideSearchPath(OverrideSearchPath *newpath)
Definition: namespace.c:3464
Definition: nodes.h:525
void ProcessUtility(PlannedStmt *pstmt, const char *queryString, ProcessUtilityContext context, ParamListInfo params, QueryEnvironment *queryEnv, DestReceiver *dest, char *completionTag)
Definition: utility.c:338
int errcode(int sqlerrcode)
Definition: elog.c:570
List * lcons_oid(Oid datum, List *list)
Definition: list.c:489
unsigned int Oid
Definition: postgres_ext.h:31
bool IsReservedName(const char *name)
Definition: catalog.c:214
DestReceiver * None_Receiver
Definition: dest.c:96
int stmt_len
Definition: plannodes.h:94
FormData_pg_authid * Form_pg_authid
Definition: pg_authid.h:56
void aclcheck_error(AclResult aclerr, ObjectType objtype, const char *objectname)
Definition: aclchk.c:3353
#define SearchSysCacheExists1(cacheId, key1)
Definition: syscache.h:183
#define ObjectIdGetDatum(X)
Definition: postgres.h:507
#define ERROR
Definition: elog.h:43
#define ACL_CREATE
Definition: parsenodes.h:84
OverrideSearchPath * GetOverrideSearchPath(MemoryContext context)
Definition: namespace.c:3352
char * get_database_name(Oid dbid)
Definition: dbcommands.c:2099
int stmt_location
Definition: plannodes.h:93
void GetUserIdAndSecContext(Oid *userid, int *sec_context)
Definition: miscinit.c:485
int errdetail(const char *fmt,...)
Definition: elog.c:860
Node * utilityStmt
Definition: plannodes.h:90
MemoryContext CurrentMemoryContext
Definition: mcxt.c:38
void check_is_member_of_role(Oid member, Oid role)
Definition: acl.c:4954
#define ereport(elevel, rest)
Definition: elog.h:141
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1124
void PopOverrideSearchPath(void)
Definition: namespace.c:3523
bool canSetTag
Definition: plannodes.h:54
AclResult
Definition: acl.h:177
CmdType commandType
Definition: plannodes.h:46
void CommandCounterIncrement(void)
Definition: xact.c:1003
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1172
Oid MyDatabaseId
Definition: globals.c:85
Oid get_rolespec_oid(const RoleSpec *role, bool missing_ok)
Definition: acl.c:5225
#define SECURITY_LOCAL_USERID_CHANGE
Definition: miscadmin.h:299
bool allowSystemTableMods
Definition: globals.c:120
#define InvalidOid
Definition: postgres_ext.h:36
#define NOTICE
Definition: elog.h:37
#define makeNode(_type_)
Definition: nodes.h:573
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
AclResult pg_database_aclcheck(Oid db_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:4643
#define lfirst(lc)
Definition: pg_list.h:190
#define ObjectAddressSet(addr, class_id, object_id)
Definition: objectaddress.h:40
List * transformCreateSchemaStmt(CreateSchemaStmt *stmt)
const ObjectAddress InvalidObjectAddress
int errmsg(const char *fmt,...)
Definition: elog.c:784
#define elog(elevel,...)
Definition: elog.h:226
#define NameStr(name)
Definition: c.h:609
void EventTriggerCollectSimpleCommand(ObjectAddress address, ObjectAddress secondaryObject, Node *parsetree)
Definition: pg_list.h:50
Oid NamespaceCreate(const char *nspName, Oid ownerId, bool isTemp)
Definition: pg_namespace.c:43

◆ RemoveSchemaById()

void RemoveSchemaById ( Oid  schemaOid)

Definition at line 218 of file schemacmds.c.

References CatalogTupleDelete(), elog, ERROR, HeapTupleIsValid, NAMESPACEOID, ObjectIdGetDatum, ReleaseSysCache(), RowExclusiveLock, SearchSysCache1(), HeapTupleData::t_self, table_close(), and table_open().

Referenced by doDeletion().

219 {
220  Relation relation;
221  HeapTuple tup;
222 
223  relation = table_open(NamespaceRelationId, RowExclusiveLock);
224 
226  ObjectIdGetDatum(schemaOid));
227  if (!HeapTupleIsValid(tup)) /* should not happen */
228  elog(ERROR, "cache lookup failed for namespace %u", schemaOid);
229 
230  CatalogTupleDelete(relation, &tup->t_self);
231 
232  ReleaseSysCache(tup);
233 
234  table_close(relation, RowExclusiveLock);
235 }
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
void CatalogTupleDelete(Relation heapRel, ItemPointer tid)
Definition: indexing.c:269
#define ObjectIdGetDatum(X)
Definition: postgres.h:507
#define ERROR
Definition: elog.h:43
ItemPointerData t_self
Definition: htup.h:65
#define RowExclusiveLock
Definition: lockdefs.h:38
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1124
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1172
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
#define elog(elevel,...)
Definition: elog.h:226
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39

◆ RenameSchema()

ObjectAddress RenameSchema ( const char *  oldname,
const char *  newname 
)

Definition at line 242 of file schemacmds.c.

References ACL_CREATE, aclcheck_error(), ACLCHECK_NOT_OWNER, ACLCHECK_OK, allowSystemTableMods, CatalogTupleUpdate(), CStringGetDatum, ereport, errcode(), errdetail(), errmsg(), ERROR, get_database_name(), get_namespace_oid(), GETSTRUCT, GetUserId(), heap_freetuple(), HeapTupleIsValid, InvokeObjectPostAlterHook, IsReservedName(), MyDatabaseId, NAMESPACENAME, namestrcpy(), NoLock, OBJECT_DATABASE, OBJECT_SCHEMA, ObjectAddressSet, OidIsValid, pg_database_aclcheck(), pg_namespace_ownercheck(), RowExclusiveLock, SearchSysCacheCopy1, HeapTupleData::t_self, table_close(), and table_open().

Referenced by ExecRenameStmt().

243 {
244  Oid nspOid;
245  HeapTuple tup;
246  Relation rel;
247  AclResult aclresult;
248  ObjectAddress address;
249  Form_pg_namespace nspform;
250 
251  rel = table_open(NamespaceRelationId, RowExclusiveLock);
252 
254  if (!HeapTupleIsValid(tup))
255  ereport(ERROR,
256  (errcode(ERRCODE_UNDEFINED_SCHEMA),
257  errmsg("schema \"%s\" does not exist", oldname)));
258 
259  nspform = (Form_pg_namespace) GETSTRUCT(tup);
260  nspOid = nspform->oid;
261 
262  /* make sure the new name doesn't exist */
263  if (OidIsValid(get_namespace_oid(newname, true)))
264  ereport(ERROR,
265  (errcode(ERRCODE_DUPLICATE_SCHEMA),
266  errmsg("schema \"%s\" already exists", newname)));
267 
268  /* must be owner */
269  if (!pg_namespace_ownercheck(nspOid, GetUserId()))
271  oldname);
272 
273  /* must have CREATE privilege on database */
275  if (aclresult != ACLCHECK_OK)
276  aclcheck_error(aclresult, OBJECT_DATABASE,
278 
279  if (!allowSystemTableMods && IsReservedName(newname))
280  ereport(ERROR,
281  (errcode(ERRCODE_RESERVED_NAME),
282  errmsg("unacceptable schema name \"%s\"", newname),
283  errdetail("The prefix \"pg_\" is reserved for system schemas.")));
284 
285  /* rename */
286  namestrcpy(&nspform->nspname, newname);
287  CatalogTupleUpdate(rel, &tup->t_self, tup);
288 
289  InvokeObjectPostAlterHook(NamespaceRelationId, nspOid, 0);
290 
291  ObjectAddressSet(address, NamespaceRelationId, nspOid);
292 
293  table_close(rel, NoLock);
294  heap_freetuple(tup);
295 
296  return address;
297 }
Oid get_namespace_oid(const char *nspname, bool missing_ok)
Definition: namespace.c:3035
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
#define GETSTRUCT(TUP)
Definition: htup_details.h:655
FormData_pg_namespace * Form_pg_namespace
Definition: pg_namespace.h:51
Oid GetUserId(void)
Definition: miscinit.c:380
int errcode(int sqlerrcode)
Definition: elog.c:570
bool pg_namespace_ownercheck(Oid nsp_oid, Oid roleid)
Definition: aclchk.c:4931
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1338
unsigned int Oid
Definition: postgres_ext.h:31
bool IsReservedName(const char *name)
Definition: catalog.c:214
int namestrcpy(Name name, const char *str)
Definition: name.c:250
#define OidIsValid(objectId)
Definition: c.h:638
void aclcheck_error(AclResult aclerr, ObjectType objtype, const char *objectname)
Definition: aclchk.c:3353
#define ERROR
Definition: elog.h:43
#define ACL_CREATE
Definition: parsenodes.h:84
ItemPointerData t_self
Definition: htup.h:65
char * get_database_name(Oid dbid)
Definition: dbcommands.c:2099
#define NoLock
Definition: lockdefs.h:34
#define RowExclusiveLock
Definition: lockdefs.h:38
int errdetail(const char *fmt,...)
Definition: elog.c:860
#define CStringGetDatum(X)
Definition: postgres.h:578
#define ereport(elevel, rest)
Definition: elog.h:141
#define InvokeObjectPostAlterHook(classId, objectId, subId)
Definition: objectaccess.h:163
AclResult
Definition: acl.h:177
Oid MyDatabaseId
Definition: globals.c:85
bool allowSystemTableMods
Definition: globals.c:120
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
AclResult pg_database_aclcheck(Oid db_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:4643
void CatalogTupleUpdate(Relation heapRel, ItemPointer otid, HeapTuple tup)
Definition: indexing.c:224
#define ObjectAddressSet(addr, class_id, object_id)
Definition: objectaddress.h:40
#define SearchSysCacheCopy1(cacheId, key1)
Definition: syscache.h:174
int errmsg(const char *fmt,...)
Definition: elog.c:784
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39