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Revert temp_tablespaces because of coding problems, per Tom.

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This commit is contained in:
Bruce Momjian
2007-03-06 02:06:15 +00:00
parent 4ae6967f5f
commit a535cdf130
10 changed files with 16 additions and 258 deletions
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143
src/backend/commands/tablespace.c
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@ -37,7 +37,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/tablespace.c,v 1.42 2007/02/01 19:10:26 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/tablespace.c,v 1.43 2007/03/06 02:06:13 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -65,12 +65,9 @@
#include "utils/lsyscache.h"
/* GUC variables */
/* GUC variable */
char *default_tablespace = NULL;
char *temp_tablespaces = NULL;
int next_temp_tablespace;
int num_temp_tablespaces;
static bool remove_tablespace_directories(Oid tablespaceoid, bool redo);
static void set_short_version(const char *path);
@ -933,142 +930,6 @@ GetDefaultTablespace(void)
return result;
}
/*
* Routines for handling the GUC variable 'temp_tablespaces'.
*/
/* assign_hook: validate new temp_tablespaces, do extra actions as needed */
const char *
assign_temp_tablespaces(const char *newval, bool doit, GucSource source)
{
char *rawname;
List *namelist;
ListCell *l;
/* Need a modifiable copy of string */
rawname = pstrdup(newval);
/* Parse string into list of identifiers */
if (!SplitIdentifierString(rawname, ',', &namelist))
{
/* syntax error in name list */
pfree(rawname);
list_free(namelist);
return NULL;
}
num_temp_tablespaces = 0;
foreach(l, namelist)
{
char *curname = (char *) lfirst(l);
/*
* If we aren't inside a transaction, we cannot do database access so
* cannot verify the individual names. Must accept the list on faith.
*/
if (source >= PGC_S_INTERACTIVE && IsTransactionState())
{
/*
* Verify that all the names are valid tablspace names
* We do not check for USAGE rights should we?
*/
if (get_tablespace_oid(curname) == InvalidOid)
ereport((source == PGC_S_TEST) ? NOTICE : ERROR,
(errcode(ERRCODE_UNDEFINED_OBJECT),
errmsg("tablespace \"%s\" does not exist", curname)));
}
num_temp_tablespaces++;
}
/*
* Select the first tablespace to use
*/
next_temp_tablespace = MyProcPid % num_temp_tablespaces;
pfree(rawname);
list_free(namelist);
return newval;
}
/*
* GetTempTablespace -- get the OID of the tablespace for temporary objects
*
* May return InvalidOid to indicate "use the database's default tablespace"
*
* This exists to hide the temp_tablespace GUC variable.
*/
Oid
GetTempTablespace(void)
{
Oid result;
char *curname = NULL;
char *rawname;
List *namelist;
ListCell *l;
int i = 0;
if ( temp_tablespaces == NULL )
return InvalidOid;
/* Need a modifiable version of temp_tablespaces */
rawname = pstrdup(temp_tablespaces);
/* Parse string into list of identifiers */
if (!SplitIdentifierString(rawname, ',', &namelist))
{
/* syntax error in name list */
pfree(rawname);
list_free(namelist);
return InvalidOid;
}
/*
* Iterate through the list of namespaces until the one we need
* (next_temp_tablespace)
*/
foreach(l, namelist)
{
curname = (char *) lfirst(l);
if ( i == next_temp_tablespace )
break;
i++;
}
/* Prepare for the next time the function is called */
next_temp_tablespace++;
if (next_temp_tablespace == num_temp_tablespaces)
next_temp_tablespace = 0;
/* Fast path for temp_tablespaces == "" */
if ( curname == NULL || curname[0] == '\0') {
list_free(namelist);
pfree(rawname);
return InvalidOid;
}
/*
* It is tempting to cache this lookup for more speed, but then we would
* fail to detect the case where the tablespace was dropped since the GUC
* variable was set. Note also that we don't complain if the value fails
* to refer to an existing tablespace; we just silently return InvalidOid,
* causing the new object to be created in the database's tablespace.
*/
result = get_tablespace_oid(curname);
/* We don't free rawname before because curname points to a part of it */
pfree(rawname);
/*
* Allow explicit specification of database's default tablespace in
* default_tablespace without triggering permissions checks.
*/
if (result == MyDatabaseTableSpace)
result = InvalidOid;
list_free(namelist);
return result;
}
/*
* get_tablespace_oid - given a tablespace name, look up the OID