Weijun-H commented on PR #12153:
URL: https://github.com/apache/datafusion/pull/12153#issuecomment-2310456995
> Thanks @Weijun-H overall LGTM. I also tested some cases for nested type as
the key. They work well. 👍
>
> ```
> # Test duplicate keys
> query error DataFusion error: Execution error: map key must be unique,
duplicate key found: \[1, 2\]
> SELECT MAP([[1,2], [1,2], []], [41, 33, null]);
>
> # Test duplicate keys
> query error DataFusion error: Execution error: map key must be unique,
duplicate key found: \[\{1:1\}\]
> SELECT MAP([Map {1:'1'}, Map {1:'1'}, Map {2:'2'}], [41, 33, null]);
> ```
Nice catch! I added them to the tests
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