Changes MemLimit to MemTracker:
- the limit is optional
- it also records a label and an optional parent
- Consume() and Release() also update the ancestors and there's also a new
AnyLimitExceeded(), which also checks the ancestors
- the consumption counter is a HighwaterMarkCounter and can optionally be created
as part of a profile
Each fragment instance now has a MemTracker that is part of a 3-level
hierarchy: process, query, fragment instance.
Change-Id: I5f580f4956fdf07d70bd9a6531032439aaf0fd07
Reviewed-on: http://gerrit.ent.cloudera.com:8080/339
Reviewed-by: Nong Li <nong@cloudera.com>
Tested-by: Nong Li <nong@cloudera.com>
This adds support for CREATE TABLE AS SELECT to Impala. It supports all functionality a
regular CREATE TABLE statement includes, except it does not allow for for specifying
partition columns. Hive also has this limitation and it wouldn't be too hard to support
in the future.
Change-Id: I4ca3c3b8f1576441b8bb5ed9dc521d7dfa96ab74
Reviewed-on: http://gerrit.ent.cloudera.com:8080/157
Reviewed-by: Lenni Kuff <lskuff@cloudera.com>
Tested-by: Lenni Kuff <lskuff@cloudera.com>
