caicancai commented on code in PR #3915:
URL: https://github.com/apache/calcite/pull/3915#discussion_r1715575506
##########
testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
##########
@@ -13824,6 +13824,54 @@ 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)",
+ "2016-02-20",
+ "DATE NOT NULL");
+ f.checkScalar("date_add(timestamp '2016-02-22 13:00:01', -2.0)",
+ "2016-02-20",
+ "DATE NOT NULL");
+ f.checkNull("date_add(CAST(NULL AS DATE), 5)");
+ f.checkNull("date_add(date '2016-02-22', CAST(NULL AS INTEGER))");
Review Comment:
Good suggestion. I tested it in spark and it seems that spark is not aware
of this error. Should we fix this error in calcite or keep this behavior?
scala> val df = spark.sql("SELECT date_add('0001-01-01', -2)")
df: org.apache.spark.sql.DataFrame = [date_add(0001-01-01, -2): date]
```
scala> df.show()
+------------------------+
|date_add(0001-01-01, -2)|
+------------------------+
| 0000-12-30|
+------------------------+
scala> val df = spark.sql("SELECT date_add('0000-01-01', -2)")
df: org.apache.spark.sql.DataFrame = [date_add(0000-01-01, -2): date]
scala> df.show()
+------------------------+
|date_add(0000-01-01, -2)|
+------------------------+
| -0001-12-30|
+------------------------+
```
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