MaxGekk commented on code in PR #38520:
URL: https://github.com/apache/spark/pull/38520#discussion_r1014774113
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sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala:
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@@ -745,4 +745,52 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite
with SQLHelper with Quer
)
)
}
+
+ test("check types for Lag") {
+ val lag = Lag(Literal(1), NonFoldableLiteral(10), Literal(null), true)
+ assert(lag.checkInputDataTypes() ==
Review Comment:
Could you trigger the error from user space, please? This check is pretty
trivial.
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