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Wrap calls to SearchSysCache and related functions using macros.

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The purpose of this change is to eliminate the need for every caller
of SearchSysCache, SearchSysCacheCopy, SearchSysCacheExists,
GetSysCacheOid, and SearchSysCacheList to know the maximum number
of allowable keys for a syscache entry (currently 4).  This will
make it far easier to increase the maximum number of keys in a
future release should we choose to do so, and it makes the code
shorter, too.

Design and review by Tom Lane.
This commit is contained in:
Robert Haas
2010-02-14 18:42:19 +00:00
parent 1012492bc0
commit e26c539e9f
97 changed files with 1125 additions and 2061 deletions
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22
src/backend/commands/dbcommands.c
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@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/dbcommands.c,v 1.233 2010/01/16 14:16:31 sriggs Exp $
* $PostgreSQL: pgsql/src/backend/commands/dbcommands.c,v 1.234 2010/02/14 18:42:14 rhaas Exp $
*
*-------------------------------------------------------------------------
*/
@ -809,9 +809,7 @@ dropdb(const char *dbname, bool missing_ok)
/*
* Remove the database's tuple from pg_database.
*/
tup = SearchSysCache(DATABASEOID,
ObjectIdGetDatum(db_id),
0, 0, 0);
tup = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(db_id));
if (!HeapTupleIsValid(tup))
elog(ERROR, "cache lookup failed for database %u", db_id);
@ -951,9 +949,7 @@ RenameDatabase(const char *oldname, const char *newname)
errdetail_busy_db(notherbackends, npreparedxacts)));
/* rename */
newtup = SearchSysCacheCopy(DATABASEOID,
ObjectIdGetDatum(db_id),
0, 0, 0);
newtup = SearchSysCacheCopy1(DATABASEOID, ObjectIdGetDatum(db_id));
if (!HeapTupleIsValid(newtup))
elog(ERROR, "cache lookup failed for database %u", db_id);
namestrcpy(&(((Form_pg_database) GETSTRUCT(newtup))->datname), newname);
@ -1611,9 +1607,7 @@ get_db_info(const char *name, LOCKMODE lockmode,
* the same name, we win; else, drop the lock and loop back to try
* again.
*/
tuple = SearchSysCache(DATABASEOID,
ObjectIdGetDatum(dbOid),
0, 0, 0);
tuple = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(dbOid));
if (HeapTupleIsValid(tuple))
{
Form_pg_database dbform = (Form_pg_database) GETSTRUCT(tuple);
@ -1677,9 +1671,7 @@ have_createdb_privilege(void)
if (superuser())
return true;
utup = SearchSysCache(AUTHOID,
ObjectIdGetDatum(GetUserId()),
0, 0, 0);
utup = SearchSysCache1(AUTHOID, ObjectIdGetDatum(GetUserId()));
if (HeapTupleIsValid(utup))
{
result = ((Form_pg_authid) GETSTRUCT(utup))->rolcreatedb;
@ -1875,9 +1867,7 @@ get_database_name(Oid dbid)
HeapTuple dbtuple;
char *result;
dbtuple = SearchSysCache(DATABASEOID,
ObjectIdGetDatum(dbid),
0, 0, 0);
dbtuple = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(dbid));
if (HeapTupleIsValid(dbtuple))
{
result = pstrdup(NameStr(((Form_pg_database) GETSTRUCT(dbtuple))->datname));