[KUDU-1639] Improve predicate pushdown - ASF JIRA

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Umbrella ticket for proposed improvements to predicates, scan optimization based on predicates, and partition pruning.

1.	Efficiently support predicates on non-prefix key components	Open	Unassigned
2.	Add predicate to allow scan based on COLUMN LIKE '%val%'	Open	Sameer Abhyankar
3.	NaN float and double values are not handled correctly	Open	William Berkeley
4.	Simplify IN-list predicate values based on tablet partition key or rowset PK bounds	Open	Unassigned
5.	Convert IN-list predicates into primary key range bounds on low cardinality tablets	Open	Unassigned
6.	Improve range partition pruning with IN-list predicates	Open	Haijie Hong
7.	Improve range partition pruning and primary-key bound optimization with upper-bound range predicates on discrete typed columns	Open	Unassigned
8.	Java: use primary key bounds when pruning range partitions which are a prefix of the PK	Open	Unassigned
9.	Add NOT EQUAL predicate type	Open	LiFu He
10.	Support NOT predicate pushdown	Open	Unassigned
11.	Convert scans with IN-list predicates on primary key prefix to multiple scans with equality predicates	Open	Unassigned
12.	Support OR predicate pushdown	Open	ZhangYao