caicancai commented on code in PR #3936:
URL: https://github.com/apache/calcite/pull/3936#discussion_r1739558445
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testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
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@@ -5185,6 +5187,61 @@ void testBitGetFunc(SqlOperatorFixture f, String
functionName) {
}
}
+ /** Test case for
+ * <a
href="https://issues.apache.org/jira/browse/CALCITE-6551";>[CALCITE-6551]
+ * Add DATE_FORMAT function (enabled in MySQL library)</a>. */
+ @Test void testDateFormat() {
+ final SqlOperatorFixture f = fixture()
+ .withTester(t -> TESTER).withLibrary(SqlLibrary.MYSQL);
+ f.setFor(SqlLibraryOperators.DATE_FORMAT);
+ final Locale originalLocale = Locale.getDefault();
+
+ try {
+ Locale.setDefault(Locale.US);
+ f.checkString("date_format(timestamp '2009-10-04 22:23:00', '%W %M %Y')",
Review Comment:
> > SELECT DATE_FORMAT(timestamp '0000-01-01', '%X %V');
>
> This failed because '0000-01-01' is not a timestamp. You can try:
>
> ```
> SELECT DATE_FORMAT(data '0000-01-01', '%X %V');
> ```
0000-01-01 is not even a valid date according to the SQL standard.
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