Reynold Xin created SPARK-8801:
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Summary: Support TypeCollection in ExpectsInputTypes
Key: SPARK-8801
URL: https://issues.apache.org/jira/browse/SPARK-8801
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Reynold Xin
Assignee: Reynold Xin
Some functions support more than one input types for each parameter. For
example, length supports binary and string, and maybe array/struct in the
future.
This ticket proposes a TypeCollection AbstractDataType that supports multiple
data types.
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