dawidwys commented on PR #22917:
URL: https://github.com/apache/flink/pull/22917#issuecomment-1618315195
Could we add a test case for the empty array in `CollectionFunctionsITCase`?
We can do that via a UDF.
```
public static class CreateEmptyArray extends ScalarFunction {
public @DataTypeHint("ARRAY<INT NOT NULL>") int[] eval() {
return new int[]{};
}
}
.withFunction(CreateEmptyArray.class)
.testResult(call("CreateEmptyArray").arrayMax(),
"ARRAY_MAX(CreateEmptyArray())", null, DataTypes.INT())
```
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