ILuffZhe commented on code in PR #4179:
URL: https://github.com/apache/calcite/pull/4179#discussion_r1942177188
##########
core/src/test/java/org/apache/calcite/test/SqlValidatorTest.java:
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@@ -1057,6 +1057,19 @@ void testDyadicCollateOperator() {
+ "Was expecting 3 arguments");
}
+ /** Test case for <a
href="https://issues.apache.org/jira/projects/CALCITE/issues/CALCITE-6813";>
+ * [CALCITE-6813] UNNEST infers incorrect nullability for the result when
applied to
+ * an array that contains nullable ROW values</a>. */
+ @Test void testUnnestRow() {
+ sql("with orders(data) as\n"
+ + " (values (ARRAY[ROW(1, 'Alice'), ROW(2, NULL), ROW(NULL, 'Bob'),
NULL]))\n"
+ + "select e.EXPR$0\n"
+ + "from orders, UNNEST(orders.data) as e")
+ .type(actualType -> {
Review Comment:
What if all ROW values are not nullable?
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