Reynold Xin created SPARK-9404:
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Summary: UnsafeArrayData
Key: SPARK-9404
URL: https://issues.apache.org/jira/browse/SPARK-9404
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Reynold Xin
Assignee: Wenchen Fan
An Unsafe-based ArrayData implementation. To begin with, we can encode data
this way:
first 4 bytes is the # elements
then each 4 byte is the start offset of the element, unless it is negative, in
which case the element is null.
followed by the elements themselves
For example, [10, 11, 12, 13, null, 14], internally should be represented as
(each 4 bytes)
5, 28, 32, 36, 40, -44, 48, 10, 11, 12, 13, 0, 14
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