hi, how do I implement AsyncLookupFunctions correctly? I implemented a AsyncLookupFunction, the eval function has the following signature: https://nightlies.apache.org/flink/flink-docs-release-1.17/api/java/org/apache/flink/table/functions/AsyncLookupFunction.html eval(CompletableFuture<Collection<RowData>> future, Object... keys) I also implemented the Provider: https://nightlies.apache.org/flink/flink-docs-master/api/java/org/apache/flink/table/connector/source/lookup/AsyncLookupFunctionProvider.html unfortunately there is no documentation on the AsyncLookupFunction and AsyncLookupFunctionProvider so I feel like I quite in the dark here. if I register my AsyncLookupFunction as UDF and try to call it with this example snippet:
WITH tbl AS (SELECT 123 as id, '456' as pmntid, 'IDR' as cur) SELECT * from tbl join Lateral Table(cashlessInfo(id, pmntid, cur)) I get the following error: No match found for function signature cashlessInfo(<NUMERIC>, <CHARACTER>, <CHARACTER>) I tried creating a DynamicTableSourceFactory and a Table that uses this one similar to https://nightlies.apache.org/flink/flink-docs-release-1.19/docs/dev/table/sourcessinks/#full-stack-example but I am not sure what schema to use here? Any help/advice in which direction to investigate further? -- By communicating with Grab Holdings Limited and/or its subsidiaries, associate companies and jointly controlled entities (collectively, “Grab”), you are deemed to have consented to the processing of your personal data as set out in the Privacy Notice which can be viewed at https://grab.com/privacy/ <https://grab.com/privacy/> This email contains confidential information that may be privileged and is only for the intended recipient(s). If you are not the intended recipient(s), please do not disseminate, distribute or copy this email. Please notify Grab immediately if you have received this by mistake and delete this email from your system. Email transmission may not be secure or error-free as any information could be intercepted, corrupted, lost, destroyed, delayed or incomplete, or contain viruses. Grab does not accept liability for any errors or omissions in this email that arise as a result of email transmission. All intellectual property rights in this email and any attachments shall remain vested in Grab, unless otherwise provided by law
