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Columnar: update README to compare with cstore_fdw.

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Jeff Davis 2021-02-11 10:47:14 -08:00 committed by Jeff Davis
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@ -16,6 +16,26 @@ The Citus Columnar tables work best for analytic or DW workloads:
* Doesn't read unnecessary columns
* Efficient `VACUUM`
# Next generation of cstore_fdw
Citus Columnar is the next generation of
[cstore_fdw](https://github.com/citusdata/cstore_fdw/).
Benefits of Citus Columnar over cstore_fdw:
* Citus Columnar is based on the [Table Access Method
API](https://www.postgresql.org/docs/current/tableam.html), which
allows it to behave exactly like an ordinary heap (row) table for
most operations.
* Supports Write-Ahead Log (WAL).
* Supports ``ROLLBACK``.
* Supports physical replication.
* Supports recovery, including Point-In-Time Restore (PITR).
* Supports ``pg_dump`` and ``pg_upgrade`` without the need for special
options or extra steps.
* Better user experience; simple ``USING``clause.
* Supports more features that work on ordinary heap (row) tables.
# Limitations
* Append-only (no ``UPDATE``/``DELETE`` support)