filter out all partitions
This commit fixes IMPALA-1028 in which the cardinality estimate is not
correct when all the partitions of a partitioned table are filtered out.
To fix this issue we make sure that the estimated result cardinality of
the scan node is zero when all the partitions are filtered out.
Change-Id: I225949eb2e8f905a5d0f678d7f199fb95ba4aab0
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3063
Reviewed-by: Dimitris Tsirogiannis <dtsirogiannis@cloudera.com>
Tested-by: jenkins
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3083
The explain tests that verify we detect missing stats properly is failing for avro. This
change disables the test to unblock the full data load build.
Change-Id: I0a7f54dbf1e8a3ebb557250287e7e0491aaa27f2
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1925
Reviewed-by: Ishaan Joshi <ishaan@cloudera.com>
Tested-by: jenkins
Our new build machines (e.g., beefy) have more cores than our other machines,
so scan nodes may have a different memory estimate causing the explain tests
to fail. This patch fixes the num_scanner_threads to 1 for explain tests
to ensure consisteny estimates.
Change-Id: Ie6194f3c3b17d04aa141d04fcddb7ac948e92fcf
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1735
Reviewed-by: Nong Li <nong@cloudera.com>
Tested-by: jenkins
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1753
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
There are now 4 explain levels summarized as follows:
- Level 0: MINIMAL
Non-fragmented parallel plan only showing plan nodes with minimal attributes
- Level 1: STANDARD
Non-fragmented parallel plan with some details in plan nodes
- Level 2: EXTENDED
Non-fragmented parallel plan with full details in plan nodes including
the table/column stats, row size, #hosts, cardinality,
and estimated per-host memory requirement
- Level 3: VERBOSE
Fragmented parallel plan with full details (like level 2)
This patch also includes several bugfixes related to plan costing and/or
testing of explain plans.
Change-Id: I622310f01d1b3d53ea1031adaf3b3ffdd94eba30
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1211
Reviewed-by: Alex Behm <alex.behm@cloudera.com>
Tested-by: jenkins
Hue is moving to HiveServer2 but HiveServer2 does not have an "explain" RPC
call. To support "explain", I added it to the language.
An "explain" statement will return a result set: one row per explain line.
