chunweilei commented on code in PR #2787:
URL: https://github.com/apache/calcite/pull/2787#discussion_r867585466
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testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
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@@ -1776,6 +1776,15 @@ protected static Calendar getCalendarNotTooNear(int
timeUnit) {
f.checkNull(" cast(null as ANY) || cast(null as ANY) ");
f.checkString("cast('a' as varchar) || cast('b' as varchar) "
+ "|| cast('c' as varchar)", "abc", "VARCHAR NOT NULL");
+
+ f.checkScalar("array[1, 2] || array[2, 3]", "[1, 2, 2, 3]",
+ "INTEGER NOT NULL ARRAY NOT NULL");
+ f.checkScalar("array[1, 2] || array[2, null]", "[1, 2, 2, null]",
+ "INTEGER ARRAY NOT NULL");
+ f.checkScalar("array['hello', 'world'] || array['!'] || "
+ + "array[cast(null as char)]",
+ "[hello, world, !, null]", "CHAR(5) ARRAY NOT NULL");
Review Comment:
Get it!
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