mysqltest: Query with parallel(3), dual RANK OVER, and GROUP BY triggers 2013 connection lost

[chyujing]

Description

A test case in vectorize.vec_bug involving a query with parallel(3), two RANK OVER window functions, and a GROUP BY clause triggers a 2013 connection lost error during mysqltest execution.

Steps to Reproduce

1. Log on to the target machine.
2. Navigate to the directory /obdata/data/AndroidTest/ob_opensource_test/tools/deploy.
3. Execute the test.

Environment

• Test case: vectorize.vec_bug
• Error: 2013 (connection lost)