sql_cmd_test too easy to fail

super unstable
- fails at high frequency
- too much useless log
- failed test affect subsequent tests, hard to debug real test fails

Look for the sql_cmd_test in the test suite. Examine the test logs to identify the high-frequency failures and the excessive logging. Determine how failed tests affect subsequent ones, possibly due to shared state. Focus on isolating tests and reducing log noise to improve stability.

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