* Database management commands (create/drop database).
*
*
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/commands/dbcommands.c,v 1.104 2002/09/03 22:17:34 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/commands/dbcommands.c,v 1.134 2004/05/26 13:56:45 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include <unistd.h>
#include <sys/stat.h>
+#include "access/genam.h"
#include "access/heapam.h"
#include "catalog/catname.h"
#include "catalog/catalog.h"
#include "commands/comment.h"
#include "commands/dbcommands.h"
#include "miscadmin.h"
+#include "storage/fd.h"
#include "storage/freespace.h"
#include "storage/sinval.h"
+#include "utils/acl.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
char *alt_loc;
char *target_dir;
char src_loc[MAXPGPATH];
+#ifndef WIN32
char buf[2 * MAXPGPATH + 100];
+#endif
Oid src_dboid;
- int4 src_owner;
+ AclId src_owner;
int src_encoding;
bool src_istemplate;
Oid src_lastsysoid;
Datum new_record[Natts_pg_database];
char new_record_nulls[Natts_pg_database];
Oid dboid;
- int32 datdba;
- List *option;
+ AclId datdba;
+ ListCell *option;
DefElem *downer = NULL;
- DefElem *dpath = NULL;
- DefElem *dtemplate = NULL;
- DefElem *dencoding = NULL;
+ DefElem *dpath = NULL;
+ DefElem *dtemplate = NULL;
+ DefElem *dencoding = NULL;
char *dbname = stmt->dbname;
char *dbowner = NULL;
char *dbpath = NULL;
char *dbtemplate = NULL;
- int encoding = -1;
+ int encoding = -1;
/* Extract options from the statement node tree */
foreach(option, stmt->options)
if (strcmp(defel->defname, "owner") == 0)
{
if (downer)
- elog(ERROR, "CREATE DATABASE: conflicting options");
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("conflicting or redundant options")));
downer = defel;
}
else if (strcmp(defel->defname, "location") == 0)
{
if (dpath)
- elog(ERROR, "CREATE DATABASE: conflicting options");
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("conflicting or redundant options")));
dpath = defel;
}
else if (strcmp(defel->defname, "template") == 0)
{
if (dtemplate)
- elog(ERROR, "CREATE DATABASE: conflicting options");
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("conflicting or redundant options")));
dtemplate = defel;
}
else if (strcmp(defel->defname, "encoding") == 0)
{
if (dencoding)
- elog(ERROR, "CREATE DATABASE: conflicting options");
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("conflicting or redundant options")));
dencoding = defel;
}
else
- elog(ERROR, "CREATE DATABASE: option \"%s\" not recognized",
+ elog(ERROR, "option \"%s\" not recognized",
defel->defname);
}
- if (downer)
+ if (downer && downer->arg)
dbowner = strVal(downer->arg);
- if (dpath)
+ if (dpath && dpath->arg)
dbpath = strVal(dpath->arg);
- if (dtemplate)
+ if (dtemplate && dtemplate->arg)
dbtemplate = strVal(dtemplate->arg);
- if (dencoding)
- encoding = intVal(dencoding->arg);
+ if (dencoding && dencoding->arg)
+ {
+ const char *encoding_name;
+
+ if (IsA(dencoding->arg, Integer))
+ {
+ encoding = intVal(dencoding->arg);
+ encoding_name = pg_encoding_to_char(encoding);
+ if (strcmp(encoding_name, "") == 0 ||
+ pg_valid_server_encoding(encoding_name) < 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("%d is not a valid encoding code",
+ encoding)));
+ }
+ else if (IsA(dencoding->arg, String))
+ {
+ encoding_name = strVal(dencoding->arg);
+ if (pg_valid_server_encoding(encoding_name) < 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("%s is not a valid encoding name",
+ encoding_name)));
+ encoding = pg_char_to_encoding(encoding_name);
+ }
+ else
+ elog(ERROR, "unrecognized node type: %d",
+ nodeTag(dencoding->arg));
+ }
/* obtain sysid of proposed owner */
if (dbowner)
- datdba = get_usesysid(dbowner); /* will elog if no such user */
+ datdba = get_usesysid(dbowner); /* will ereport if no such user */
else
datdba = GetUserId();
- if (datdba == (int32) GetUserId())
+ if (datdba == GetUserId())
{
/* creating database for self: can be superuser or createdb */
if (!superuser() && !have_createdb_privilege())
- elog(ERROR, "CREATE DATABASE: permission denied");
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("permission denied to create database")));
}
else
{
/* creating database for someone else: must be superuser */
/* note that the someone else need not have any permissions */
if (!superuser())
- elog(ERROR, "CREATE DATABASE: permission denied");
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("must be superuser to create database for another user")));
}
/* don't call this in a transaction block */
- if (IsTransactionBlock())
- elog(ERROR, "CREATE DATABASE: may not be called in a transaction block");
+ PreventTransactionChain((void *) stmt, "CREATE DATABASE");
+
+ /* alternate location requires symlinks */
+#ifndef HAVE_SYMLINK
+ if (dbpath != NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("cannot use an alternative location on this platform")));
+#endif
/*
* Check for db name conflict. There is a race condition here, since
* after we grab the exclusive lock.
*/
if (get_db_info(dbname, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL))
- elog(ERROR, "CREATE DATABASE: database \"%s\" already exists", dbname);
+ ereport(ERROR,
+ (errcode(ERRCODE_DUPLICATE_DATABASE),
+ errmsg("database \"%s\" already exists", dbname)));
/*
* Lookup database (template) to be cloned.
&src_istemplate, &src_lastsysoid,
&src_vacuumxid, &src_frozenxid,
src_dbpath))
- elog(ERROR, "CREATE DATABASE: template \"%s\" does not exist",
- dbtemplate);
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_DATABASE),
+ errmsg("template database \"%s\" does not exist", dbtemplate)));
/*
* Permission check: to copy a DB that's not marked datistemplate, you
*/
if (!src_istemplate)
{
- if (!superuser() && GetUserId() != src_owner )
- elog(ERROR, "CREATE DATABASE: permission to copy \"%s\" denied",
- dbtemplate);
+ if (!superuser() && GetUserId() != src_owner)
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("permission denied to copy database \"%s\"",
+ dbtemplate)));
}
/*
* bulletproof, since someone might connect while we are copying...
*/
if (DatabaseHasActiveBackends(src_dboid, true))
- elog(ERROR, "CREATE DATABASE: source database \"%s\" is being accessed by other users", dbtemplate);
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_IN_USE),
+ errmsg("source database \"%s\" is being accessed by other users",
+ dbtemplate)));
/* If encoding is defaulted, use source's encoding */
if (encoding < 0)
/* Some encodings are client only */
if (!PG_VALID_BE_ENCODING(encoding))
- elog(ERROR, "CREATE DATABASE: invalid backend encoding");
+ ereport(ERROR,
+ (errcode(ERRCODE_WRONG_OBJECT_TYPE),
+ errmsg("invalid server encoding %d", encoding)));
/*
* Preassign OID for pg_database tuple, so that we can compute db
* database), and resolve alternate physical location if one is
* specified.
*
- * If an alternate location is specified but is the same as the
- * normal path, just drop the alternate-location spec (this seems
- * friendlier than erroring out). We must test this case to avoid
- * creating a circular symlink below.
+ * If an alternate location is specified but is the same as the normal
+ * path, just drop the alternate-location spec (this seems friendlier
+ * than erroring out). We must test this case to avoid creating a
+ * circular symlink below.
*/
nominal_loc = GetDatabasePath(dboid);
alt_loc = resolve_alt_dbpath(dbpath, dboid);
}
if (strchr(nominal_loc, '\''))
- elog(ERROR, "database path may not contain single quotes");
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_NAME),
+ errmsg("database path may not contain single quotes")));
if (alt_loc && strchr(alt_loc, '\''))
- elog(ERROR, "database path may not contain single quotes");
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_NAME),
+ errmsg("database path may not contain single quotes")));
if (strchr(src_loc, '\''))
- elog(ERROR, "database path may not contain single quotes");
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_NAME),
+ errmsg("database path may not contain single quotes")));
/* ... otherwise we'd be open to shell exploits below */
/*
* up-to-date for the copy. (We really only need to flush buffers for
* the source database...)
*/
- BufferSync();
+ BufferSync(-1, -1);
/*
* Close virtual file descriptors so the kernel has more available for
target_dir = alt_loc ? alt_loc : nominal_loc;
if (mkdir(target_dir, S_IRWXU) != 0)
- elog(ERROR, "CREATE DATABASE: unable to create database directory '%s': %m",
- target_dir);
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not create database directory \"%s\": %m",
+ target_dir)));
if (rmdir(target_dir) != 0)
- elog(ERROR, "CREATE DATABASE: unable to remove temp directory '%s': %m",
- target_dir);
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not remove temporary directory \"%s\": %m",
+ target_dir)));
/* Make the symlink, if needed */
if (alt_loc)
{
+#ifdef HAVE_SYMLINK /* already throws error above */
if (symlink(alt_loc, nominal_loc) != 0)
- elog(ERROR, "CREATE DATABASE: could not link '%s' to '%s': %m",
- nominal_loc, alt_loc);
+#endif
+ ereport(ERROR,
+ (errcode_for_file_access(),
+ errmsg("could not link file \"%s\" to \"%s\": %m",
+ nominal_loc, alt_loc)));
}
- /* Copy the template database to the new location */
+ /*
+ * Copy the template database to the new location
+ *
+ * XXX use of cp really makes this code pretty grotty, particularly
+ * with respect to lack of ability to report errors well. Someday
+ * rewrite to do it for ourselves.
+ */
+#ifndef WIN32
+ /* We might need to use cp -R one day for portability */
snprintf(buf, sizeof(buf), "cp -r '%s' '%s'", src_loc, target_dir);
-
if (system(buf) != 0)
{
if (remove_dbdirs(nominal_loc, alt_loc))
- elog(ERROR, "CREATE DATABASE: could not initialize database directory");
+ ereport(ERROR,
+ (errmsg("could not initialize database directory"),
+ errdetail("Failing system command was: %s", buf),
+ errhint("Look in the postmaster's stderr log for more information.")));
else
- elog(ERROR, "CREATE DATABASE: could not initialize database directory; delete failed as well");
+ ereport(ERROR,
+ (errmsg("could not initialize database directory; delete failed as well"),
+ errdetail("Failing system command was: %s", buf),
+ errhint("Look in the postmaster's stderr log for more information.")));
}
+#else /* WIN32 */
+ if (copydir(src_loc, target_dir) != 0)
+ {
+ /* copydir should already have given details of its troubles */
+ if (remove_dbdirs(nominal_loc, alt_loc))
+ ereport(ERROR,
+ (errmsg("could not initialize database directory")));
+ else
+ ereport(ERROR,
+ (errmsg("could not initialize database directory; delete failed as well")));
+ }
+#endif /* WIN32 */
/*
* Now OK to grab exclusive lock on pg_database.
/* Don't hold lock while doing recursive remove */
heap_close(pg_database_rel, AccessExclusiveLock);
remove_dbdirs(nominal_loc, alt_loc);
- elog(ERROR, "CREATE DATABASE: database \"%s\" already exists", dbname);
+ ereport(ERROR,
+ (errcode(ERRCODE_DUPLICATE_DATABASE),
+ errmsg("database \"%s\" already exists", dbname)));
}
/*
/* do not set datpath to null, GetRawDatabaseInfo won't cope */
new_record[Anum_pg_database_datpath - 1] =
DirectFunctionCall1(textin, CStringGetDatum(dbpath ? dbpath : ""));
+
/*
* We deliberately set datconfig and datacl to defaults (NULL), rather
* than copying them from the template database. Copying datacl would
- * be a bad idea when the owner is not the same as the template's owner.
- * It's more debatable whether datconfig should be copied.
+ * be a bad idea when the owner is not the same as the template's
+ * owner. It's more debatable whether datconfig should be copied.
*/
new_record_nulls[Anum_pg_database_datconfig - 1] = 'n';
new_record_nulls[Anum_pg_database_datacl - 1] = 'n';
* will see the new database in pg_database right away. (They'll see
* an uncommitted tuple, but they don't care; see GetRawDatabaseInfo.)
*/
- BufferSync();
+ BufferSync(-1, -1);
}
char *nominal_loc;
char dbpath[MAXPGPATH];
Relation pgdbrel;
- HeapScanDesc pgdbscan;
+ SysScanDesc pgdbscan;
ScanKeyData key;
HeapTuple tup;
AssertArg(dbname);
- if (strcmp(dbname, DatabaseName) == 0)
- elog(ERROR, "DROP DATABASE: cannot be executed on the currently open database");
+ if (strcmp(dbname, get_database_name(MyDatabaseId)) == 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_IN_USE),
+ errmsg("cannot drop the currently open database")));
- if (IsTransactionBlock())
- elog(ERROR, "DROP DATABASE: may not be called in a transaction block");
+ PreventTransactionChain((void *) dbname, "DROP DATABASE");
/*
* Obtain exclusive lock on pg_database. We need this to ensure that
if (!get_db_info(dbname, &db_id, &db_owner, NULL,
&db_istemplate, NULL, NULL, NULL, dbpath))
- elog(ERROR, "DROP DATABASE: database \"%s\" does not exist", dbname);
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_DATABASE),
+ errmsg("database \"%s\" does not exist", dbname)));
if (GetUserId() != db_owner && !superuser())
- elog(ERROR, "DROP DATABASE: permission denied");
+ aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_DATABASE,
+ dbname);
/*
* Disallow dropping a DB that is marked istemplate. This is just to
* they can do so if they're really determined ...
*/
if (db_istemplate)
- elog(ERROR, "DROP DATABASE: database is marked as a template");
+ ereport(ERROR,
+ (errcode(ERRCODE_WRONG_OBJECT_TYPE),
+ errmsg("cannot drop a template database")));
nominal_loc = GetDatabasePath(db_id);
alt_loc = resolve_alt_dbpath(dbpath, db_id);
* Check for active backends in the target database.
*/
if (DatabaseHasActiveBackends(db_id, false))
- elog(ERROR, "DROP DATABASE: database \"%s\" is being accessed by other users", dbname);
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_IN_USE),
+ errmsg("database \"%s\" is being accessed by other users",
+ dbname)));
/*
* Find the database's tuple by OID (should be unique).
*/
- ScanKeyEntryInitialize(&key, 0, ObjectIdAttributeNumber,
- F_OIDEQ, ObjectIdGetDatum(db_id));
+ ScanKeyInit(&key,
+ ObjectIdAttributeNumber,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(db_id));
- pgdbscan = heap_beginscan(pgdbrel, SnapshotNow, 1, &key);
+ pgdbscan = systable_beginscan(pgdbrel, DatabaseOidIndex, true,
+ SnapshotNow, 1, &key);
- tup = heap_getnext(pgdbscan, ForwardScanDirection);
+ tup = systable_getnext(pgdbscan);
if (!HeapTupleIsValid(tup))
{
/*
* This error should never come up since the existence of the
* database is checked earlier
*/
- elog(ERROR, "DROP DATABASE: Database \"%s\" doesn't exist despite earlier reports to the contrary",
+ elog(ERROR, "database \"%s\" doesn't exist despite earlier reports to the contrary",
dbname);
}
/* Remove the database's tuple from pg_database */
simple_heap_delete(pgdbrel, &tup->t_self);
- heap_endscan(pgdbscan);
+ systable_endscan(pgdbscan);
/*
* Delete any comments associated with the database
* (They'll see an uncommitted deletion, but they don't care; see
* GetRawDatabaseInfo.)
*/
- BufferSync();
+ BufferSync(-1, -1);
}
+/*
+ * Rename database
+ */
+void
+RenameDatabase(const char *oldname, const char *newname)
+{
+ HeapTuple tup,
+ newtup;
+ Relation rel;
+ SysScanDesc scan,
+ scan2;
+ ScanKeyData key,
+ key2;
+
+ /*
+ * Obtain AccessExclusiveLock so that no new session gets started
+ * while the rename is in progress.
+ */
+ rel = heap_openr(DatabaseRelationName, AccessExclusiveLock);
+
+ ScanKeyInit(&key,
+ Anum_pg_database_datname,
+ BTEqualStrategyNumber, F_NAMEEQ,
+ NameGetDatum(oldname));
+ scan = systable_beginscan(rel, DatabaseNameIndex, true,
+ SnapshotNow, 1, &key);
+
+ tup = systable_getnext(scan);
+ if (!HeapTupleIsValid(tup))
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_DATABASE),
+ errmsg("database \"%s\" does not exist", oldname)));
+
+ /*
+ * XXX Client applications probably store the current database
+ * somewhere, so renaming it could cause confusion. On the other
+ * hand, there may not be an actual problem besides a little
+ * confusion, so think about this and decide.
+ */
+ if (HeapTupleGetOid(tup) == MyDatabaseId)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("current database may not be renamed")));
+
+ /*
+ * Make sure the database does not have active sessions. Might not be
+ * necessary, but it's consistent with other database operations.
+ */
+ if (DatabaseHasActiveBackends(HeapTupleGetOid(tup), false))
+ ereport(ERROR,
+ (errcode(ERRCODE_OBJECT_IN_USE),
+ errmsg("database \"%s\" is being accessed by other users",
+ oldname)));
+
+ /* make sure the new name doesn't exist */
+ ScanKeyInit(&key2,
+ Anum_pg_database_datname,
+ BTEqualStrategyNumber, F_NAMEEQ,
+ NameGetDatum(newname));
+ scan2 = systable_beginscan(rel, DatabaseNameIndex, true,
+ SnapshotNow, 1, &key2);
+ if (HeapTupleIsValid(systable_getnext(scan2)))
+ ereport(ERROR,
+ (errcode(ERRCODE_DUPLICATE_DATABASE),
+ errmsg("database \"%s\" already exists", newname)));
+ systable_endscan(scan2);
+
+ /* must be owner */
+ if (!pg_database_ownercheck(HeapTupleGetOid(tup), GetUserId()))
+ aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_DATABASE,
+ oldname);
+
+ /* must have createdb */
+ if (!have_createdb_privilege())
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("permission denied to rename database")));
+
+ /* rename */
+ newtup = heap_copytuple(tup);
+ namestrcpy(&(((Form_pg_database) GETSTRUCT(newtup))->datname), newname);
+ simple_heap_update(rel, &tup->t_self, newtup);
+ CatalogUpdateIndexes(rel, newtup);
+
+ systable_endscan(scan);
+ heap_close(rel, NoLock);
+
+ /*
+ * Force dirty buffers out to disk, so that newly-connecting backends
+ * will see the renamed database in pg_database right away. (They'll
+ * see an uncommitted tuple, but they don't care; see
+ * GetRawDatabaseInfo.)
+ */
+ BufferSync(-1, -1);
+}
+
/*
* ALTER DATABASE name SET ...
HeapTuple tuple,
newtuple;
Relation rel;
- ScanKeyData scankey;
- HeapScanDesc scan;
+ ScanKeyData scankey;
+ SysScanDesc scan;
Datum repl_val[Natts_pg_database];
char repl_null[Natts_pg_database];
char repl_repl[Natts_pg_database];
valuestr = flatten_set_variable_args(stmt->variable, stmt->value);
rel = heap_openr(DatabaseRelationName, RowExclusiveLock);
- ScanKeyEntryInitialize(&scankey, 0, Anum_pg_database_datname,
- F_NAMEEQ, NameGetDatum(stmt->dbname));
- scan = heap_beginscan(rel, SnapshotNow, 1, &scankey);
- tuple = heap_getnext(scan, ForwardScanDirection);
+ ScanKeyInit(&scankey,
+ Anum_pg_database_datname,
+ BTEqualStrategyNumber, F_NAMEEQ,
+ NameGetDatum(stmt->dbname));
+ scan = systable_beginscan(rel, DatabaseNameIndex, true,
+ SnapshotNow, 1, &scankey);
+ tuple = systable_getnext(scan);
if (!HeapTupleIsValid(tuple))
- elog(ERROR, "database \"%s\" does not exist", stmt->dbname);
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_DATABASE),
+ errmsg("database \"%s\" does not exist", stmt->dbname)));
if (!(superuser()
- || ((Form_pg_database) GETSTRUCT(tuple))->datdba == GetUserId()))
- elog(ERROR, "permission denied");
+ || ((Form_pg_database) GETSTRUCT(tuple))->datdba == GetUserId()))
+ aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_DATABASE,
+ stmt->dbname);
MemSet(repl_repl, ' ', sizeof(repl_repl));
- repl_repl[Anum_pg_database_datconfig-1] = 'r';
+ repl_repl[Anum_pg_database_datconfig - 1] = 'r';
- if (strcmp(stmt->variable, "all")==0 && valuestr == NULL)
+ if (strcmp(stmt->variable, "all") == 0 && valuestr == NULL)
{
/* RESET ALL */
- repl_null[Anum_pg_database_datconfig-1] = 'n';
- repl_val[Anum_pg_database_datconfig-1] = (Datum) 0;
+ repl_null[Anum_pg_database_datconfig - 1] = 'n';
+ repl_val[Anum_pg_database_datconfig - 1] = (Datum) 0;
}
else
{
- Datum datum;
- bool isnull;
- ArrayType *a;
+ Datum datum;
+ bool isnull;
+ ArrayType *a;
- repl_null[Anum_pg_database_datconfig-1] = ' ';
+ repl_null[Anum_pg_database_datconfig - 1] = ' ';
datum = heap_getattr(tuple, Anum_pg_database_datconfig,
RelationGetDescr(rel), &isnull);
- a = isnull ? ((ArrayType *) NULL) : DatumGetArrayTypeP(datum);
+ a = isnull ? NULL : DatumGetArrayTypeP(datum);
if (valuestr)
a = GUCArrayAdd(a, stmt->variable, valuestr);
else
a = GUCArrayDelete(a, stmt->variable);
- repl_val[Anum_pg_database_datconfig-1] = PointerGetDatum(a);
+ if (a)
+ repl_val[Anum_pg_database_datconfig - 1] = PointerGetDatum(a);
+ else
+ repl_null[Anum_pg_database_datconfig - 1] = 'n';
}
newtuple = heap_modifytuple(tuple, rel, repl_val, repl_null, repl_repl);
/* Update indexes */
CatalogUpdateIndexes(rel, newtuple);
- heap_endscan(scan);
+ systable_endscan(scan);
heap_close(rel, RowExclusiveLock);
}
+/*
+ * ALTER DATABASE name OWNER TO newowner
+ */
+void
+AlterDatabaseOwner(const char *dbname, const char *newowner)
+{
+ AclId newdatdba;
+ HeapTuple tuple,
+ newtuple;
+ Relation rel;
+ ScanKeyData scankey;
+ SysScanDesc scan;
+
+ rel = heap_openr(DatabaseRelationName, RowExclusiveLock);
+ ScanKeyInit(&scankey,
+ Anum_pg_database_datname,
+ BTEqualStrategyNumber, F_NAMEEQ,
+ NameGetDatum(dbname));
+ scan = systable_beginscan(rel, DatabaseNameIndex, true,
+ SnapshotNow, 1, &scankey);
+ tuple = systable_getnext(scan);
+ if (!HeapTupleIsValid(tuple))
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_DATABASE),
+ errmsg("database \"%s\" does not exist", dbname)));
+
+ /* obtain sysid of proposed owner */
+ newdatdba = get_usesysid(newowner); /* will ereport if no such user */
+
+ /* changing owner's database for someone else: must be superuser */
+ /* note that the someone else need not have any permissions */
+ if (!superuser())
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("must be superuser to change owner's database for another user")));
+
+ /* change owner */
+ newtuple = heap_copytuple(tuple);
+ ((Form_pg_database) GETSTRUCT(newtuple))->datdba = newdatdba;
+ simple_heap_update(rel, &tuple->t_self, newtuple);
+ CatalogUpdateIndexes(rel, newtuple);
+
+ systable_endscan(scan);
+ heap_close(rel, NoLock);
+}
+
/*
* Helper functions
{
Relation relation;
ScanKeyData scanKey;
- HeapScanDesc scan;
+ SysScanDesc scan;
HeapTuple tuple;
bool gottuple;
/* Caller may wish to grab a better lock on pg_database beforehand... */
relation = heap_openr(DatabaseRelationName, AccessShareLock);
- ScanKeyEntryInitialize(&scanKey, 0, Anum_pg_database_datname,
- F_NAMEEQ, NameGetDatum(name));
+ ScanKeyInit(&scanKey,
+ Anum_pg_database_datname,
+ BTEqualStrategyNumber, F_NAMEEQ,
+ NameGetDatum(name));
- scan = heap_beginscan(relation, SnapshotNow, 1, &scanKey);
+ scan = systable_beginscan(relation, DatabaseNameIndex, true,
+ SnapshotNow, 1, &scanKey);
- tuple = heap_getnext(scan, ForwardScanDirection);
+ tuple = systable_getnext(scan);
gottuple = HeapTupleIsValid(tuple);
if (gottuple)
}
}
- heap_endscan(scan);
+ systable_endscan(scan);
heap_close(relation, AccessShareLock);
return gottuple;
bool retval;
utup = SearchSysCache(SHADOWSYSID,
- ObjectIdGetDatum(GetUserId()),
+ Int32GetDatum(GetUserId()),
0, 0, 0);
if (!HeapTupleIsValid(utup))
if (dbpath == NULL || dbpath[0] == '\0')
return NULL;
- if (strchr(dbpath, '/'))
+ if (first_path_separator(dbpath))
{
- if (dbpath[0] != '/')
- elog(ERROR, "Relative paths are not allowed as database locations");
+ if (!is_absolute_path(dbpath))
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("relative paths are not allowed as database locations")));
#ifndef ALLOW_ABSOLUTE_DBPATHS
- elog(ERROR, "Absolute paths are not allowed as database locations");
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("absolute paths are not allowed as database locations")));
#endif
prefix = dbpath;
}
char *var = getenv(dbpath);
if (!var)
- elog(ERROR, "Postmaster environment variable '%s' not set", dbpath);
- if (var[0] != '/')
- elog(ERROR, "Postmaster environment variable '%s' must be absolute path", dbpath);
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("postmaster environment variable \"%s\" not found",
+ dbpath)));
+ if (!is_absolute_path(var))
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_NAME),
+ errmsg("postmaster environment variable \"%s\" must be absolute path",
+ dbpath)));
prefix = var;
}
len = strlen(prefix) + 6 + sizeof(Oid) * 8 + 1;
if (len >= MAXPGPATH - 100)
- elog(ERROR, "Alternate path is too long");
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_NAME),
+ errmsg("alternative path is too long")));
ret = palloc(len);
snprintf(ret, len, "%s/base/%u", prefix, dboid);
/* remove symlink */
if (unlink(nominal_loc) != 0)
{
- elog(WARNING, "could not remove '%s': %m", nominal_loc);
+ ereport(WARNING,
+ (errcode_for_file_access(),
+ errmsg("could not remove file \"%s\": %m", nominal_loc)));
success = false;
}
}
+#ifndef WIN32
snprintf(buf, sizeof(buf), "rm -rf '%s'", target_dir);
+#else
+ snprintf(buf, sizeof(buf), "rmdir /s /q \"%s\"", target_dir);
+#endif
if (system(buf) != 0)
{
- elog(WARNING, "database directory '%s' could not be removed",
- target_dir);
+ ereport(WARNING,
+ (errmsg("could not remove database directory \"%s\"",
+ target_dir),
+ errdetail("Failing system command was: %s", buf),
+ errhint("Look in the postmaster's stderr log for more information.")));
success = false;
}
{
Relation pg_database;
ScanKeyData entry[1];
- HeapScanDesc scan;
+ SysScanDesc scan;
HeapTuple dbtuple;
Oid oid;
/* There's no syscache for pg_database, so must look the hard way */
pg_database = heap_openr(DatabaseRelationName, AccessShareLock);
- ScanKeyEntryInitialize(&entry[0], 0x0,
- Anum_pg_database_datname, F_NAMEEQ,
- CStringGetDatum(dbname));
- scan = heap_beginscan(pg_database, SnapshotNow, 1, entry);
+ ScanKeyInit(&entry[0],
+ Anum_pg_database_datname,
+ BTEqualStrategyNumber, F_NAMEEQ,
+ CStringGetDatum(dbname));
+ scan = systable_beginscan(pg_database, DatabaseNameIndex, true,
+ SnapshotNow, 1, entry);
- dbtuple = heap_getnext(scan, ForwardScanDirection);
+ dbtuple = systable_getnext(scan);
/* We assume that there can be at most one matching tuple */
if (HeapTupleIsValid(dbtuple))
else
oid = InvalidOid;
- heap_endscan(scan);
+ systable_endscan(scan);
heap_close(pg_database, AccessShareLock);
return oid;
}
+
/*
- * get_database_owner - given a database OID, fetch the owner's usesysid.
+ * get_database_name - given a database OID, look up the name
*
- * Errors out if database not found.
+ * Returns InvalidOid if database name not found.
*
* This is not actually used in this file, but is exported for use elsewhere.
*/
-Oid
-get_database_owner(Oid dbid)
+char *
+get_database_name(Oid dbid)
{
Relation pg_database;
ScanKeyData entry[1];
- HeapScanDesc scan;
+ SysScanDesc scan;
HeapTuple dbtuple;
- int32 dba;
+ char *result;
/* There's no syscache for pg_database, so must look the hard way */
pg_database = heap_openr(DatabaseRelationName, AccessShareLock);
- ScanKeyEntryInitialize(&entry[0], 0x0,
- ObjectIdAttributeNumber, F_OIDEQ,
- ObjectIdGetDatum(dbid));
- scan = heap_beginscan(pg_database, SnapshotNow, 1, entry);
+ ScanKeyInit(&entry[0],
+ ObjectIdAttributeNumber,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(dbid));
+ scan = systable_beginscan(pg_database, DatabaseOidIndex, true,
+ SnapshotNow, 1, entry);
- dbtuple = heap_getnext(scan, ForwardScanDirection);
+ dbtuple = systable_getnext(scan);
- if (!HeapTupleIsValid(dbtuple))
- elog(ERROR, "database %u does not exist", dbid);
-
- dba = ((Form_pg_database) GETSTRUCT(dbtuple))->datdba;
+ /* We assume that there can be at most one matching tuple */
+ if (HeapTupleIsValid(dbtuple))
+ result = pstrdup(NameStr(((Form_pg_database) GETSTRUCT(dbtuple))->datname));
+ else
+ result = NULL;
- heap_endscan(scan);
+ systable_endscan(scan);
heap_close(pg_database, AccessShareLock);
- /* XXX some confusion about whether userids are OID or int4 ... */
- return (Oid) dba;
+ return result;
}
projects / postgresql / blobdiff