liuyongvs commented on code in PR #3263:
URL: https://github.com/apache/calcite/pull/3263#discussion_r1241074381
##########
testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
##########
@@ -5415,6 +5415,31 @@ private static void checkIf(SqlOperatorFixture f) {
f.checkNull("array_distinct(null)");
}
+ @Test void testArrayJoinFunc() {
+ final SqlOperatorFixture f0 = fixture();
+ f0.setFor(SqlLibraryOperators.ARRAY_JOIN);
+ f0.checkFails("^array_join(array['aa', 'b', 'c'], '-')^", "No match found
for function"
+ + " signature ARRAY_JOIN\\(<CHAR\\(2\\) ARRAY>, <CHARACTER>\\)",
false);
+
+ final SqlOperatorFixture f = f0.withLibrary(SqlLibrary.SPARK);
+ f.checkScalar("array_join(array['aa', 'b', 'c'], '-')", "aa-b-c",
+ "VARCHAR NOT NULL");
+ f.checkScalar("array_join(array[null, 'aa', null, 'b', null], '-',
'empty')",
+ "empty-aa-empty-b-empty", "VARCHAR NOT NULL");
+ f.checkScalar("array_join(array[null, 'aa', null, 'b', null], '-')",
"aa-b",
+ "VARCHAR NOT NULL");
+ f.checkScalar("array_join(array[null, x'aa', null, x'bb', null], '-')",
"aa-bb",
Review Comment:
@NobiGo
Hexadecimal Literals
https://docs.oracle.com/cd/E17952_01/mysql-8.0-en/hexadecimal-literals.html
for example： 61= 6*16+1=97， which is a
```
spark-sql (default)> select x'61';
a
```
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