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Make it possibly to specify GUC params per user and per database.

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Create a new catalog pg_db_role_setting where they are now stored, and better
encapsulate the code that deals with settings into its realm.  The old
datconfig and rolconfig columns are removed.

psql has gained a \drds command to display the settings.

Backwards compatibility warning: while the backwards-compatible system views
still have the config columns, they no longer completely represent the
configuration for a user or database.

Catalog version bumped.
This commit is contained in:
Alvaro Herrera
2009-10-07 22:14:26 +00:00
parent 07cefdfb7a
commit 2eda8dfb52
32 changed files with 738 additions and 279 deletions
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106
src/backend/commands/dbcommands.c
View File

@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/dbcommands.c,v 1.226 2009/09/01 02:54:51 alvherre Exp $
* $PostgreSQL: pgsql/src/backend/commands/dbcommands.c,v 1.227 2009/10/07 22:14:18 alvherre Exp $
*
*-------------------------------------------------------------------------
*/
@ -33,6 +33,7 @@
#include "catalog/indexing.h"
#include "catalog/pg_authid.h"
#include "catalog/pg_database.h"
#include "catalog/pg_db_role_setting.h"
#include "catalog/pg_tablespace.h"
#include "commands/comment.h"
#include "commands/dbcommands.h"
@ -50,7 +51,6 @@
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/guc.h"
#include "utils/lsyscache.h"
#include "utils/pg_locale.h"
#include "utils/snapmgr.h"
@ -544,12 +544,10 @@ createdb(const CreatedbStmt *stmt)
new_record[Anum_pg_database_dattablespace - 1] = ObjectIdGetDatum(dst_deftablespace);
/*
* 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.
* We deliberately set datacl to default (NULL), rather than copying it
* from the template database. Copying it would be a bad idea when the
* owner is not the same as the template's owner.
*/
new_record_nulls[Anum_pg_database_datconfig - 1] = true;
new_record_nulls[Anum_pg_database_datacl - 1] = true;
tuple = heap_form_tuple(RelationGetDescr(pg_database_rel),
@ -820,6 +818,11 @@ dropdb(const char *dbname, bool missing_ok)
*/
DeleteSharedComments(db_id, DatabaseRelationId);
/*
* Remove settings associated with this database
*/
DropSetting(db_id, InvalidOid);
/*
* Remove shared dependency references for the database.
*/
@ -1397,85 +1400,26 @@ AlterDatabase(AlterDatabaseStmt *stmt, bool isTopLevel)
void
AlterDatabaseSet(AlterDatabaseSetStmt *stmt)
{
char *valuestr;
HeapTuple tuple,
newtuple;
Relation rel;
ScanKeyData scankey;
SysScanDesc scan;
Datum repl_val[Natts_pg_database];
bool repl_null[Natts_pg_database];
bool repl_repl[Natts_pg_database];
valuestr = ExtractSetVariableArgs(stmt->setstmt);
Oid datid = get_database_oid(stmt->dbname);
if (!OidIsValid(datid))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_DATABASE),
errmsg("database \"%s\" does not exist", stmt->dbname)));
/*
* Get the old tuple. We don't need a lock on the database per se,
* because we're not going to do anything that would mess up incoming
* connections.
* Obtain a lock on the database and make sure it didn't go away in the
* meantime.
*/
rel = heap_open(DatabaseRelationId, RowExclusiveLock);
ScanKeyInit(&scankey,
Anum_pg_database_datname,
BTEqualStrategyNumber, F_NAMEEQ,
NameGetDatum(stmt->dbname));
scan = systable_beginscan(rel, DatabaseNameIndexId, true,
SnapshotNow, 1, &scankey);
tuple = systable_getnext(scan);
if (!HeapTupleIsValid(tuple))
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_DATABASE),
errmsg("database \"%s\" does not exist", stmt->dbname)));
shdepLockAndCheckObject(DatabaseRelationId, datid);
if (!pg_database_ownercheck(HeapTupleGetOid(tuple), GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_DATABASE,
stmt->dbname);
if (!pg_database_ownercheck(datid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_DATABASE,
stmt->dbname);
memset(repl_repl, false, sizeof(repl_repl));
repl_repl[Anum_pg_database_datconfig - 1] = true;
if (stmt->setstmt->kind == VAR_RESET_ALL)
{
/* RESET ALL, so just set datconfig to null */
repl_null[Anum_pg_database_datconfig - 1] = true;
repl_val[Anum_pg_database_datconfig - 1] = (Datum) 0;
}
else
{
Datum datum;
bool isnull;
ArrayType *a;
repl_null[Anum_pg_database_datconfig - 1] = false;
/* Extract old value of datconfig */
datum = heap_getattr(tuple, Anum_pg_database_datconfig,
RelationGetDescr(rel), &isnull);
a = isnull ? NULL : DatumGetArrayTypeP(datum);
/* Update (valuestr is NULL in RESET cases) */
if (valuestr)
a = GUCArrayAdd(a, stmt->setstmt->name, valuestr);
else
a = GUCArrayDelete(a, stmt->setstmt->name);
if (a)
repl_val[Anum_pg_database_datconfig - 1] = PointerGetDatum(a);
else
repl_null[Anum_pg_database_datconfig - 1] = true;
}
newtuple = heap_modify_tuple(tuple, RelationGetDescr(rel),
repl_val, repl_null, repl_repl);
simple_heap_update(rel, &tuple->t_self, newtuple);
/* Update indexes */
CatalogUpdateIndexes(rel, newtuple);
systable_endscan(scan);
/* Close pg_database, but keep lock till commit */
heap_close(rel, NoLock);
AlterSetting(datid, InvalidOid, stmt->setstmt);
UnlockSharedObject(DatabaseRelationId, datid, 0, AccessShareLock);
}