Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/14400#discussion_r72897142 --- Diff: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala --- @@ -727,6 +727,16 @@ class CastSuite extends SparkFunSuite with ExpressionEvalHelper { } } + test("cast struct with a timestamp field") { + val originalSchema = new StructType().add("tsField", TimestampType, nullable = false) + // nine out of ten times I'm casting a struct, it's to normalize its fields nullability + val targetSchema = new StructType().add("tsField", TimestampType, nullable = true) + + val inp = Literal.create(InternalRow(0L), originalSchema) + val expected = InternalRow(0L) + checkEvaluation(cast(inp, targetSchema), expected ) --- End diff -- and remove the extra space here too
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