Github user dyozie commented on a diff in the pull request:
https://github.com/apache/incubator-hawq-docs/pull/68#discussion_r91341823
--- Diff: ddl/ddl-schema.html.md.erb ---
@@ -90,6 +83,6 @@ The following system-level schemas exist in every
database:
- `pg_catalog` contains the system catalog tables, built-in data types,
functions, and operators. It is always part of the schema search path, even if
it is not explicitly named in the search path.
- `information_schema` consists of a standardized set of views that
contain information about the objects in the database. These views get system
information from the system catalog tables in a standardized way.
-- `pg_toast` stores large objects such as records that exceed the page
size. This schema is used internally by the HAWQ system.
+- `pg_toast` stores large objects such as records that exceed the page
size. HAWQ uses the EXTENDED strategy for column storage. It allows both
compression and out-of-line storage. Compression will be attempted first, then
out-of-line storage if the row is still too big.This schema is used internally
by the HAWQ system.
--- End diff --
Missing a period at the end of the new sentence. Also, is it confirmed
that HAWQ uses the EXTENDED strategy? Last comment from Stanley was that this
was a guess.
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