Hi ,
I have tested the function wsrep_sync_wait_upto_gtid with MariaDB version 10.4.11 . The function wsrep_sync_wait_upto_gtid is not affecting the existing client session . But, it is working as expected with the new sessions . Is that the expected behaviour . I have attached the screen shot for the better understanding .
MariaDB [test_fun]> insert into fun_gtid (id) values (26);
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Query OK, 1 row affected (0.241 sec)
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MariaDB [test_fun]> select * from fun_gtid limit 1;
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+------+
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| id |
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+------+
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| 1 |
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+------+
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1 row in set (0.624 sec)
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MariaDB [test_fun]> pager grep -i 'update\|select'
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PAGER set to 'grep -i 'update\|select''
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MariaDB [test_fun]> show processlist;
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| 14 | root | localhost | test_fun | Query | 28 | Executing | select wsrep_sync_wait_upto_gtid('42e8c139-209a-11ea-a359-2bbb061b8859:2767',500) | 0.000 |
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8 rows in set (0.187 sec)
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MariaDB [test_fun]> show processlist;
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| 14 | root | localhost | test_fun | Query | 32 | Executing | select wsrep_sync_wait_upto_gtid('42e8c139-209a-11ea-a359-2bbb061b8859:2767',500) | 0.000 |
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| 34 | system user | | NULL | Sleep | 0 | Update_rows_log_event::ha_update_row(2767) | update sbtest1 set k = 10 | 0.000 |
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8 rows in set (0.170 sec)
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MariaDB [test_fun]> \q
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Bye
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[root@mydbopslabs22 mysql]# mysql
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uWelcome to the MariaDB monitor. Commands end with ; or \g.
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Your MariaDB connection id is 37
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Server version: 10.4.11-MariaDB-log MariaDB Server
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Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
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sType 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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MariaDB [(none)]> use test_fun
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^[[AReading table information for completion of table and column names
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You can turn off this feature to get a quicker startup with -A
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Database changed
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MariaDB [test_fun]> insert into fun_gtid (id) values (26);
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ERROR 1047 (08S01): WSREP has not yet prepared node for application use
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MariaDB [test_fun]> select * from fun_gtid limit 1;
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ERROR 1047 (08S01): WSREP has not yet prepared node for application use
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MariaDB [test_fun]>
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