Add a test to cover parallel scans safety - #549
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This PR adds a test that has uncovered a concurrency problem in MySQL scanner: - duckdb/duckdb-mysql#225 - duckdb/duckdb-mysql#254 Note that Postgres scanner is not affected by the same problem due to `INITIALIZE_ON_SCHEDULE` changes added in duckdb#252. The test is still necessary to cover possible modifications to this logic in future.
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This PR adds a test that has uncovered a concurrency problem in MySQL scanner:
Note that Postgres scanner is not affected by the same problem due to
INITIALIZE_ON_SCHEDULEchanges added in #252. The test is still necessary to cover possible modifications to this logic in future.