danny0405 commented on a change in pull request #2093:
URL: https://github.com/apache/calcite/pull/2093#discussion_r464753949
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File path:
core/src/test/java/org/apache/calcite/rel/rel2sql/RelToSqlConverterTest.java
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@@ -5050,6 +5050,13 @@ private void checkLiteral2(String expression, String
expected) {
}
@Test void testSelectNull() {
+ String query = "SELECT NULL AS DUMMY FROM \"product\"";
+ final String expected = "SELECT CAST(NULL AS NULL) AS \"DUMMY\"\n"
+ + "FROM \"foodmart\".\"product\"";
+ sql(query).ok(expected);
Review comment:
Can we promote the `CAST(NULL AS NULL)` to just `NULL` ?
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