[GitHub] [spark] cloud-fan opened a new pull request #24469: [SPARK-27576][SQL] table capability to skip the output column resolution

[GitBox <gi...@apache.org>]

cloud-fan opened a new pull request #24469: [SPARK-27576][SQL] table capability to skip the output column resolution
URL: https://github.com/apache/spark/pull/24469
 
 
   ## What changes were proposed in this pull request?
   
   Currently we have an analyzer rule, which resolves the output columns of data source v2 writing plans, to make sure the schema of input query is compatible with the table.
   
   However, not all data sources need this check. For example, the `NoopDataSource` doesn't care about the schema of input query at all.
   
   This PR introduces a new table capability: ACCEPT_ANY_SCHEMA. If a table reports this capability, we skip resolving output columns for it during write.
   
   Note that, we already skip resolving output columns for `NoopDataSource` because it implements `SupportsSaveMode`. However, `SupportsSaveMode` is a hack and will be removed soon.
   
   ## How was this patch tested?
   
   new test cases
   

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