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qchen <qifan.chen@hp.com>
committed
on 13 Jan 15
fix lp 1392099 (cqd hive_max_varchar_length)
There are two contribuing factors.
1. A fully specified partition requirement (partition of 1) … Show more
fix lp 1392099 (cqd hive_max_varchar_length)

There are two contribuing factors.

1. A fully specified partition requirement (partition of 1) in

FileScan::synthHiveScanPhysicalProperty() is not recognized

and a modification of the ESPs renders the partition requirement

not satisfiable.

2. The reduction in CQD value for hive_max_varchar_length reduces

the dop from 5 to 1. In Exchange::createContextForChild(), a dop of

1 renders the parallel version of plan infeasible (see line near 2004

on test "rppForMe->getCountOfPipelines() > 1").

The fix is to address issue #1.

Added a safety check for ApproximatelyNPartitions and improvement

for hive sampling logic.

remove update to cg/TEST011

Change-Id: Idbf24be0b00b336dbac93afdddb6896ed0937e23

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