This command causes the connection to hang:
select * from `seq_-1_to_10`;
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It is possible for other threads to connect to the server, but the thread executing the SELECt statement is hung.
mysql 10.0.8-MariaDB (root) [test] db1> show processlist;
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+----+------+-----------+------+---------+------+----------------+------------------------------+----------+
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| Id | User | Host | db | Command | Time | State | Info | Progress |
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+----+------+-----------+------+---------+------+----------------+------------------------------+----------+
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| 2 | root | localhost | test | Query | 154 | Writing to net | select * from `seq_-1_to_10` | 0.000 |
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| 3 | root | localhost | test | Query | 0 | init | show processlist | 0.000 |
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+----+------+-----------+------+---------+------+----------------+------------------------------+----------+
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2 rows in set (0.01 sec)
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