caicancai commented on code in PR #3969:
URL: https://github.com/apache/calcite/pull/3969#discussion_r1764390369
##########
testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
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@@ -13910,6 +13910,63 @@ void testTimestampDiff(boolean coercionEnabled) {
f.checkNull("date_add(CAST(NULL AS DATE), interval 5 day)");
}
+ /** Test case for
+ * <a
href="https://issues.apache.org/jira/browse/CALCITE-6527";>[CALCITE-6527]
+ * Add DATE_ADD function (enabled in Spark library)</a>.
+ */
+ @Test void testDateAddSpark() {
+ final SqlOperatorFixture f0 = fixture()
+ .setFor(SqlLibraryOperators.DATE_ADD_SPARK);
+ f0.checkFails("^date_add(date '2008-12-25', "
+ + "5)^",
+ "No match found for function signature "
+ + "DATE_ADD\\(<DATE>, <NUMERIC>\\)", false);
+
+ final SqlOperatorFixture f = f0.withLibrary(SqlLibrary.SPARK);
+ f.checkScalar("date_add(date '2016-02-22', 2)",
+ "2016-02-24",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(date '2016-02-28', 2)",
+ "2016-03-01",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(date '2016-03-01', -2)",
+ "2016-02-28",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(date '2016-03-01', -2)",
+ "2016-02-28",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(date '2016-03-01', -2.0)",
+ "2016-02-28",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(date '2016-02-28', 2.0)",
+ "2016-03-01",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(date '2016-02-28', '2.0')",
+ "2016-03-01",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(timestamp '2016-02-22 13:00:01', '-2.0')",
+ "2016-02-20",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(timestamp '2016-02-22 13:00:01', -2)",
Review Comment:
@NobiGo Calcite has its own date type rules, which are different from Spark.
I am wondering whether it is necessary to return null in select
date_add('13:00:01', -2)🤔.
The dataricks documentation states that only date expressions are
accepted，https://docs.databricks.com/en/sql/language-manual/functions/date_add.html.
I think you can refer to the NVL2 function I adapted before,
https://issues.apache.org/jira/browse/CALCITE-6397
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