[IMPALA-9516] Complex types performance improvements - ASF JIRA

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IMPALA-2939	Nested Types : Address Runtime & Scoped timer overhead	Open	Unassigned	Actions
IMPALA-3841	Avoid materializing nested collections if top-level predicates already disqualify the row.	Open	Unassigned	Actions
IMPALA-4944	COMPUTE STATS on non-primitive columns	Open	Unassigned	Actions
IMPALA-5748	Switch all Parquet column readers to the batched interface	Open	Unassigned	Actions
IMPALA-9469	ORC scanner vectorization for collection types	Resolved	Zoltán Borók-Nagy	Actions
IMPALA-9595	Predicate pushdown for complex types to scan node instead of unnest node	Open	Unassigned	Actions
IMPALA-11059	Speed up zipping unnest by reading collection elements in batches	Resolved	Daniel Becker	Actions
IMPALA-11361	Implement dictionary filtering for struct members when the struct is in the select list	Open	Unassigned	Actions
IMPALA-11363	Use ReadValueBatch() when the members of Parquet StructColumnReader	Open	Unassigned	Actions
IMPALA-11364	Use Late Materialization when structs are in the select list	Open	Unassigned	Actions