fix(csharp/src/Drivers/Databricks): Update DirectResult MaxRows MaxBytes setting #3489
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eric-wang-1990
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CurtHagenlocher
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Sep 26, 2025
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CurtHagenlocher
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Thanks! Can you please fix the linter warnings?
CurtHagenlocher
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Sep 26, 2025
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The directResults field control how many rows/bytes can be returned in one arrow batch.
Before this change, due to a bug for databricks it is calling base class SparkConnection, which has maxRows=1000, which is too small.
ODBC can get all results in a single ExecuteStatement call while ADBC needs 1 ExecuteStatement and multiple FetchResults, which cause ADBC to be slower in small queries.
For ADBC:
For ODBC:
This PR update the DefaultMaxBytes to 10MB, which is the same limit on Databricks backend for Arrow row set.
MaxRows to be 500K, assuming a minimum 20 Bytes column size.