goldmedal opened a new issue, #11785: URL: https://github.com/apache/datafusion/issues/11785
### Describe the bug Currently, we support creating a map like ``` SELECT MAKE_MAP(1, 'a', 2, 'b', 3, 'c'); ---- {1: a, 2: b, 3: c} ``` However, we can't access this map if its key isn't a string. ``` SELECT MAKE_MAP(1, 'a', 2, 'b', 3, 'c')[1] ``` It will get the error ``` External error: query failed: DataFusion error: Error during planning: Error during planning: Coercion from [Map(Field { name: "entries", data_type: Struct([Field { name: "key", data_type: Int64, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }, Field { name: "value", data_type: Utf8, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }]), nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }, false), Int64] to the signature ArraySignature(ArrayAndIndex) failed. No function matches the given name and argument types 'array_element(Map(Field { name: "entries", data_type: Struct([Field { name: "key", data_type: Int64, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }, Field { name: "value", data_type: Utf8, nullable: true, dict_id: 0, dict_is_ordered: false, metadata: {} }]), nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }, false), Int64)'. You might need to add explicit type casts. Candidate functions: array_element(array, index) ``` If the key is a string, it works well. ``` query T SELECT MAKE_MAP('1', 'a', '2', 'b', '3', 'c')['1'] ---- a ``` ### To Reproduce As mentioned above, create a map with non-string keys and try to access it by the key. ### Expected behavior Given the SQL ``` SELECT MAKE_MAP(1, 'a', 2, 'b', 3, 'c')[1] ``` It should return the value `'a'`. ### Additional context https://github.com/apache/datafusion/pull/11780#discussion_r1702121012 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org