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9f387c8583
Fixes the KuduScanNode to convert InPredicates to
KuduPredicates and push them to the Kudu scan if possible.
An InPredicate can be pushed to the scan if expression is of
the exact form:
<SlotRef> IN (<LiteralExpr>, <LiteralExpr>, ...)
That means the InPredicate has the following properties:
1) It has a list of literal values (i.e. not a subquery);
All values are LiteralExprs (not SlotRefs).
2) Not negative, i.e. only 'IN' supported, not 'NOT IN'
3) The SlotRef is not wrapped in any casts
4) The types of all values match the type of the SlotRef
exactly.
A planner test was added exercising all supported types as
well as exprs where the values would not be supported.
TODO: perf testing
TODO: consider a limit on the number of list values before
keeping the predicate on the Impala scan node
(determine from testing)
Change-Id: I8988d4819d20d467b48e286917e347ca00f60cf0
Reviewed-on: http://gerrit.cloudera.org:8080/5316
Reviewed-by: Matthew Jacobs <mj@cloudera.com>
Tested-by: Internal Jenkins