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-rw-r--r--doc/src/sgml/func.sgml4
-rw-r--r--src/backend/utils/adt/dbsize.c7
-rw-r--r--src/backend/utils/cache/relfilenodemap.c2
3 files changed, 7 insertions, 6 deletions
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index da63b347e58..039b279f786 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -15814,8 +15814,8 @@ postgres=# SELECT * FROM pg_xlogfile_name_offset(pg_stop_backup());
<para>
<function>pg_filenode_relation</> is the reverse of
<function>pg_relation_filenode</>. Given a <quote>tablespace</> OID and
- a <quote>filenode</> it returns the associated relation. The default
- tablespace can be specified as 0.
+ a <quote>filenode</>, it returns the associated relation's OID. For a table
+ in the database's default tablespace, the tablespace can be specified as 0.
</para>
</sect2>
diff --git a/src/backend/utils/adt/dbsize.c b/src/backend/utils/adt/dbsize.c
index 21d1c946abe..868474680df 100644
--- a/src/backend/utils/adt/dbsize.c
+++ b/src/backend/utils/adt/dbsize.c
@@ -760,13 +760,14 @@ pg_relation_filenode(PG_FUNCTION_ARGS)
* Get the relation via (reltablespace, relfilenode)
*
* This is expected to be used when somebody wants to match an individual file
- * on the filesystem back to its table. Thats not trivially possible via
- * pg_class because that doesn't contain the relfilenodes of shared and nailed
+ * on the filesystem back to its table. That's not trivially possible via
+ * pg_class, because that doesn't contain the relfilenodes of shared and nailed
* tables.
*
* We don't fail but return NULL if we cannot find a mapping.
*
- * Instead of knowing DEFAULTTABLESPACE_OID you can pass 0.
+ * InvalidOid can be passed instead of the current database's default
+ * tablespace.
*/
Datum
pg_filenode_relation(PG_FUNCTION_ARGS)
diff --git a/src/backend/utils/cache/relfilenodemap.c b/src/backend/utils/cache/relfilenodemap.c
index 372cb33c003..2a8f83775d2 100644
--- a/src/backend/utils/cache/relfilenodemap.c
+++ b/src/backend/utils/cache/relfilenodemap.c
@@ -210,7 +210,7 @@ RelidByRelfilenode(Oid reltablespace, Oid relfilenode)
while (HeapTupleIsValid(ntp = systable_getnext(scandesc)))
{
- bool isnull;
+ bool isnull PG_USED_FOR_ASSERTS_ONLY;
if (found)
elog(ERROR,