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dbsize modification to support tablespaces

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Gavin Sherry
This commit is contained in:
Bruce Momjian 2004-08-12 19:18:05 +00:00
parent a583675108
commit 676bb9a6b4
1 changed files with 55 additions and 11 deletions
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66
contrib/dbsize/dbsize.c
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@ -6,13 +6,18 @@
#include "access/heapam.h"
#include "catalog/catalog.h"
#include "catalog/catname.h"
#include "catalog/namespace.h"
#include "catalog/pg_tablespace.h"
#include "commands/dbcommands.h"
#include "fmgr.h"
#include "storage/fd.h"
#include "utils/builtins.h"
static int64
get_tablespace_size(Oid dbid, Oid spcid, bool baddirOK);
static char *
psnprintf(size_t len, const char *fmt,...)
{
@ -44,10 +49,12 @@ database_size(PG_FUNCTION_ARGS)
Name dbname = PG_GETARG_NAME(0);
Oid dbid;
char *dbpath;
DIR *dirdesc;
struct dirent *direntry;
int64 totalsize;
#ifdef SYMLINK
Relation dbrel;
HeapScanDesc scan;
HeapTuple tuple;
#endif
dbid = get_database_oid(NameStr(*dbname));
if (!OidIsValid(dbid))
@ -55,14 +62,55 @@ database_size(PG_FUNCTION_ARGS)
(errcode(ERRCODE_UNDEFINED_DATABASE),
errmsg("database \"%s\" does not exist", NameStr(*dbname))));
dbpath = GetDatabasePath(dbid);
#ifdef SYMLINK
dbrel = heap_openr(TableSpaceRelationName, AccessShareLock);
scan = heap_beginscan(dbrel, SnapshotNow, 0, (ScanKey) NULL);
totalsize = 0;
while((tuple = heap_getnext(scan, ForwardScanDirection)))
{
Oid spcid = HeapTupleGetOid(tuple);
if(spcid != GLOBALTABLESPACE_OID)
totalsize += get_tablespace_size(dbid, spcid, true);
}
heap_endscan(scan);
heap_close(dbrel, AccessShareLock);
#else
/* Same as always */
totalsize = get_tablespace_size(dbid, DEFAULTTABLESPACE_OID, false);
#endif
/*
* We need to keep in mind that we may not be called from the database
* whose size we're reporting so, we need to look in every tablespace
* to see if our database has data in there
*/
PG_RETURN_INT64(totalsize);
}
static int64
get_tablespace_size(Oid dbid, Oid spcid, bool baddirOK)
{
char *dbpath;
DIR *dirdesc;
struct dirent *direntry;
int64 totalsize;
dbpath = GetDatabasePath(dbid, spcid);
dirdesc = AllocateDir(dbpath);
if (!dirdesc)
ereport(ERROR,
{
if(baddirOK)
return 0;
else
ereport(ERROR,
(errcode_for_file_access(),
errmsg("could not open directory \"%s\": %m", dbpath)));
}
totalsize = 0;
for (;;)
{
@ -87,18 +135,14 @@ database_size(PG_FUNCTION_ARGS)
ereport(ERROR,
(errcode_for_file_access(),
errmsg("could not stat \"%s\": %m", fullname)));
totalsize += statbuf.st_size;
pfree(fullname);
}
FreeDir(dirdesc);
PG_RETURN_INT64(totalsize);
return (totalsize);
}
/*
* SQL function: relation_size(text) returns bigint
*/