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User and database-specific session defaults for run-time configuration

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variables.  New commands ALTER DATABASE ... SET and ALTER USER ... SET.
This commit is contained in:
Peter Eisentraut
2002-03-01 22:45:19 +00:00
parent 851f766115
commit 1aac2c852a
29 changed files with 812 additions and 48 deletions
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89
src/backend/commands/user.c
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/commands/user.c,v 1.90 2001/11/05 17:46:25 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/user.c,v 1.91 2002/03/01 22:45:08 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -30,6 +30,7 @@
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/guc.h"
#include "utils/lsyscache.h"
#include "utils/syscache.h"
@ -406,6 +407,8 @@ CreateUser(CreateUserStmt *stmt)
new_record_nulls[Anum_pg_shadow_passwd - 1] = password ? ' ' : 'n';
new_record_nulls[Anum_pg_shadow_valuntil - 1] = validUntil ? ' ' : 'n';
new_record_nulls[Anum_pg_shadow_useconfig - 1] = 'n';
tuple = heap_formtuple(pg_shadow_dsc, new_record, new_record_nulls);
/*
@ -653,6 +656,11 @@ AlterUser(AlterUserStmt *stmt)
new_record_nulls[Anum_pg_shadow_valuntil - 1] = null ? 'n' : ' ';
}
/* leave useconfig as is */
new_record[Anum_pg_shadow_useconfig - 1] =
heap_getattr(tuple, Anum_pg_shadow_useconfig, pg_shadow_dsc, &null);
new_record_nulls[Anum_pg_shadow_useconfig - 1] = null ? 'n' : ' ';
new_tuple = heap_formtuple(pg_shadow_dsc, new_record, new_record_nulls);
simple_heap_update(pg_shadow_rel, &tuple->t_self, new_tuple);
@ -684,6 +692,85 @@ AlterUser(AlterUserStmt *stmt)
/*
* ALTER USER ... SET
*/
void
AlterUserSet(AlterUserSetStmt *stmt)
{
char *valuestr;
HeapTuple oldtuple,
newtuple;
Relation rel;
Datum repl_val[Natts_pg_shadow];
char repl_null[Natts_pg_shadow];
char repl_repl[Natts_pg_shadow];
int i;
valuestr = (stmt->value
? ((A_Const *) lfirst(stmt->value))->val.val.str
: NULL);
rel = heap_openr(ShadowRelationName, RowExclusiveLock);
oldtuple = SearchSysCache(SHADOWNAME,
PointerGetDatum(stmt->user),
0, 0, 0);
if (!HeapTupleIsValid(oldtuple))
elog(ERROR, "user \"%s\" does not exist", stmt->user);
if (!(superuser()
|| ((Form_pg_shadow) GETSTRUCT(oldtuple))->usesysid == GetUserId()))
elog(ERROR, "permission denied");
for (i = 0; i < Natts_pg_shadow; i++)
repl_repl[i] = ' ';
repl_repl[Anum_pg_shadow_useconfig-1] = 'r';
if (strcmp(stmt->variable, "all")==0 && stmt->value == NULL)
/* RESET ALL */
repl_null[Anum_pg_shadow_useconfig-1] = 'n';
else
{
Datum datum;
bool isnull;
ArrayType *a;
repl_null[Anum_pg_shadow_useconfig-1] = ' ';
datum = SysCacheGetAttr(SHADOWNAME, oldtuple,
Anum_pg_shadow_useconfig, &isnull);
if (valuestr)
a = GUCArrayAdd(isnull
? NULL
: (ArrayType *) pg_detoast_datum((struct varlena *)datum),
stmt->variable, valuestr);
else
a = GUCArrayDelete(isnull
? NULL
: (ArrayType *) pg_detoast_datum((struct varlena *)datum),
stmt->variable);
repl_val[Anum_pg_shadow_useconfig-1] = PointerGetDatum(a);
}
newtuple = heap_modifytuple(oldtuple, rel, repl_val, repl_null, repl_repl);
simple_heap_update(rel, &oldtuple->t_self, newtuple);
{
Relation idescs[Num_pg_shadow_indices];
CatalogOpenIndices(Num_pg_shadow_indices, Name_pg_shadow_indices, idescs);
CatalogIndexInsert(idescs, Num_pg_shadow_indices, rel, newtuple);
CatalogCloseIndices(Num_pg_shadow_indices, idescs);
}
ReleaseSysCache(oldtuple);
heap_close(rel, RowExclusiveLock);
}
/*
* DROP USER
*/