mihaibudiu commented on code in PR #5042:
URL: https://github.com/apache/calcite/pull/5042#discussion_r3464531551
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testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
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@@ -9281,9 +9284,10 @@ void checkArrayReverseFunc(SqlOperatorFixture f0,
SqlFunction function,
f1.checkType("map_concat(cast(null as map<varchar, int>), map['foo', 1])",
"(VARCHAR NOT NULL, INTEGER) MAP");
- f1.checkFails("^map_concat(map('foo', 1), null)^",
- "Function 'MAP_CONCAT' should all be of type map, "
- + "but it is 'NULL'", false);
+ f1.checkNull("map_concat(map('foo', 1), null)");
Review Comment:
Maybe this should be documented. Frankly, it looks wrong to me, for empty
array the type is inferred to be ANY ARRAY I think
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