caicancai commented on code in PR #3915:
URL: https://github.com/apache/calcite/pull/3915#discussion_r1720867290
##########
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:
@mihaibudiu Sorry for the late reply.
After testing, the date_add function will format the date. For example,
invalid dates such as `0000-01-01` will fail the date format.
For example:
```
f.checkScalar("date_add(date '0000-01-01', '-3')",
"0000-12-29",
"DATE NOT NULL");
throw org.apache.calcite.runtime.CalciteContextException: From line 1,
column 18 to line 1, column 34: Illegal DATE literal '0000-01-01': not in
format 'yyyy-MM-dd'
```
But there doesn't seem to be any date format for the output, but I think
that's another question.
```
f.checkScalar("date_add(date '0001-01-01', '-3')",
"0000-12-29",
"DATE NOT NULL");
```
and the input date may fail to format such as` date_add(date '000/-12-31',
'2')`
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