Jiang Xingbo created SPARK-18624:
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Summary: Implict cast between ArrayTypes
Key: SPARK-18624
URL: https://issues.apache.org/jira/browse/SPARK-18624
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Jiang Xingbo
Priority: Minor
Currently `ImplicitTypeCasts` doesn't handle casts between ArrayTypes, this is
not convenient, we should add a rule to enable casting from
ArrayType(InternalType) to ArrayType(newInternalType).
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