Show processlist host is percent sign (%)

Today, users report a question:

The following occurs when you show full processlist;:

| |

| | 46977247 | common |% | common | Connect | 391 | updating |

| | 46977311 | common |% | common | Connect | 331 | updating |

| | 46977312 | common |% | common | Connect | 330 | updating |

| | 46977406 | common |% | common | Connect | 237 | updating |

| | 46977413 | common |% | common | Connect | 231 | updating |

| | 46977446 | common |% | common | Connect | | updating |

| | 46977459 | common |% | common | Connect | 189th | updating |

| | 46977462 | common |% | common | Connect | 46977462 | updating |

| | 46977477 | common |% | common | Connect | 46977477 | updating |

| | 46977489 | common |% | common | Connect | 159th | updating |

| | 46977490 | common |% | common | Connect | 158th | updating |

| | 46977493 | common |% | common | Connect | 46977493 | updating |

| | 46977496 | common |% | common | Connect | | updating |

| | 46977511 | common |% | common | Connect | 46977511 | updating |

| | 46977519 | common |% | common | Connect | 129th | updating |

| | 46977523 | common |% | common | Connect | 46977523 | updating |

| | 46977526 | common |% | common | Connect | 123 | updating |

| | 46977530 | common |% | common | Connect | 119th | updating |

| | 46977532 | common |% | common | Connect | 46977532 | updating |

| | 46977533 | common |% | common | Connect | 46977533 | updating |

| | 46977537 | common |% | common | Connect | 46977537 | updating |

The host column shows only a% number, not the ip address.

This seems a little inappropriate. I thought about the reason: I didn't expect it, and I didn't find the answer on the Internet.

Inspiration comes in an instant:

Use the following ways to simulate:

Delimiter

CREATE DEFINER= `root` @ `% `PROCEDURE `insert_ pro` ()

Begin

DECLARE counter INT DEFAULT 0

Insert_loop: loop

Set counter=counter+1

Insert into test values (counter,counter,counter)

If counter=10000 then

Leave insert_loop

End if

End loop insert_loop

End

CREATE EVENT IF NOT EXISTS e_test

ON SCHEDULE EVERY 10 SECOND

ON COMPLETION PRESERVE

DO CALL test.insert_pro ()

Then go to show full processlist.

Mysql > show full processlist

+-+-- + -- +

| | Id | User | Host | db | Command | Time | State | Info |

+-+-- + -- +

| | 1 | event_scheduler | localhost | NULL | Daemon | 2 | Waiting for next activation | NULL |

| | 64 | root | localhost:34176 | test | Sleep | 52 | | NULL |

| | 65 | root | localhost:34177 | NULL | Query | 0 | System lock | show full processlist | |

| | 74 | root |% | test | Connect | 0 | query end | insert into test values (counter,counter,counter) |

| | 75 | root |% | test | Connect | 0 | query end | insert into test values (counter,counter,counter) |

+-+-- + -- +

5 rows in set (0.00 sec)

This situation can be simulated.

It is actually the result of the event call.

Please indicate the source of the reprint.

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