[SPARK-53882][CONNECT] Add optional sqlstate to sparkthrowables #52696
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What changes were proposed in this pull request?
Spark connect client cannot properly read the error details when the server has a new error. This is because it relies on an internal ErrorClassReader which pulls from a local json file that contains the error details at that time. However this json file can become out of date when the server throws a new error.
This PR ensures all exceptions will contain an optional sql state property and override the getSqlState to method to first check if the sql state is defined, otherwise use the original functionality (i.e. read from json file). To ensure backward compatibility, all sql states are initially None.
We will also make a client side change in #52589 so that when client receives an exception, it will read the sql state first when reconstructing the exception and populate that exceptions field. Now older clients can carry sql state information for newer servers!
Why are the changes needed?
Does this PR introduce any user-facing change?
How was this patch tested?
Was this patch authored or co-authored using generative AI tooling?