Ashish Sharma created ORC-323:
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Summary: Predicate push down for nested fields
Key: ORC-323
URL: https://issues.apache.org/jira/browse/ORC-323
Project: ORC
Issue Type: Improvement
Reporter: Ashish Sharma
ORC supports predicate pushdown (block skipping) for ORC hive tables only on
top-level fields.
struct<int1:int,string1:string>
ORC should also support block skipping on nested fields (within structs).
struct<int1:int,complex:struct<int2:int,String1:string>>
Advantage of having predicate pushdown in nested filed will allow ORC to skip
blocks while having comparison at nested fields level. Skipping block will
result in reduction of physical memory and compute.
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