stefankandic commented on code in PR #46561:
URL: https://github.com/apache/spark/pull/46561#discussion_r1598605527
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sql/core/src/test/scala/org/apache/spark/sql/CollationStringExpressionsSuite.scala:
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@@ -959,6 +959,37 @@ class CollationStringExpressionsSuite
assert(collationMismatch.getErrorClass ===
"DATATYPE_MISMATCH.UNEXPECTED_INPUT_TYPE")
}
+ test("DateFormat string expression with collation") {
+ case class DateFormatTestCase[R](d: String, f: String, c: String, r: R)
+ val testCases = Seq(
+ DateFormatTestCase("2021-01-01", "yyyy-MM-dd", "UTF8_BINARY",
"2021-01-01"),
+ DateFormatTestCase("2021-01-01", "yyyy-dd", "UTF8_BINARY_LCASE",
"2021-01"),
+ DateFormatTestCase("2021-01-01", "yyyy-MM-dd", "UNICODE", "2021-01-01"),
+ DateFormatTestCase("2021-01-01", "yyyy", "UNICODE_CI", "2021")
+ )
+
+ testCases.foreach(t => {
Review Comment:
instead of writing all cases manually maybe think about doing this like:
```scala
for {
collateFirstArgument <- Seq(true, false)
collateSecondArgument <- Seq(true, false)
} {
val firstArgument = if (collateFirstArgument) s"collate('${t.d}',
'${t.c}')" else s"'${t.d}'"
...
}
```
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