mihaibudiu commented on code in PR #3501:
URL: https://github.com/apache/calcite/pull/3501#discussion_r1381997969
##########
testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
##########
@@ -10497,6 +10497,27 @@ private static void
checkArrayConcatAggFuncFails(SqlOperatorFixture t) {
"[1 , 2 , Hi , null]", "CHAR(10) ARRAY NOT
NULL");
}
+ /**
+ * Test case for
+ * <a
href="https://issues.apache.org/jira/browse/CALCITE-6091";>[CALCITE-6091]
+ * Char that in array or map is truncated in CASE WHEN statement</a>.
+ */
+ @Test void testTruncatedCharInCaseWhen() {
Review Comment:
I don't understand how this test relates to the change in the code.
The code is about nullability, but this test does not have any null values.
But the issue is about the type inference across cases in a case statement.
This would suggest that the bug is actually in leastRestrictive, which
doesn't handle properly nullable types?
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