This requires the previously added RELFILENODE syscache and the added
RelationMapFilenodeToOid function added in previous commits.
---
doc/src/sgml/func.sgml | 23 +++++++++++-
src/backend/utils/adt/dbsize.c | 79 ++++++++++++++++++++++++++++++++++++++++++
src/include/catalog/pg_proc.h | 2 ++
src/include/utils/builtins.h | 1 +
4 files changed, 104 insertions(+), 1 deletion(-)