amaliujia commented on a change in pull request #2020:
URL: https://github.com/apache/calcite/pull/2020#discussion_r440575715
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File path:
core/src/test/java/org/apache/calcite/test/TypeCoercionConverterTest.java
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@@ -61,6 +61,14 @@
+ "from (values (true, true, true))");
}
+ @Test void testNotInOperation() {
+ checkPlanEquals("select\n"
+ + "4 not in ('1', '2', '3') as f0,\n"
+ + "(3, 4) not in (('1', '2')) as f1,\n"
+ + "(2, 3) not in (('1', '2'), ('3', '4')) as f2\n"
+ + "from (values (true, true, true))");
Review comment:
Trying to understand this test case:
so it tests if value is coerced and the way to check it is doing not_in. For
example. `4 not in ('1', '2', '3')`. 4 should be coerced to varchar then it is
not in `('1', '2', '3')`.
Then, I guess what is missing is negative cases. Because seems to me that
even 4 is coerced, it will still not in ('1', '2', '3').
So for each positive case here, there could be a negative case. For example,
`3 not in ('1', '2', '3')` which returns false.
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