maropu commented on a change in pull request #25189: [SPARK-28435][SQL] Support
cast StringType to IntervalType for SQL interface
URL: https://github.com/apache/spark/pull/25189#discussion_r305207265
##########
File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/DataTypeParserSuite.scala
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@@ -58,6 +58,7 @@ class DataTypeParserSuite extends SparkFunSuite {
checkDataType("varchAr(20)", StringType)
checkDataType("cHaR(27)", StringType)
checkDataType("BINARY", BinaryType)
+ checkDataType("interval", CalendarIntervalType)
Review comment:
nit: This change accepts an interval keyword in a schema string, so could
you add tests in `StructTypeSuite`. too?
```
scala> org.apache.spark.sql.types.StructType.fromDDL("a interval")
res0: org.apache.spark.sql.types.StructType =
StructType(StructField(a,CalendarIntervalType,true))
```
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