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MXS-3158 Preserve character set and collation when altering events

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During switchover/failover, server events are altered. The ALTER
EVENT command automatically modifies the event charset and collation
to the values of the connetion running the query. This may cause
the event to become invalid.

Fixed this by changing connection charset and collation to the ones
in the event description just before altering it.
This commit is contained in:
Esa Korhonen
2020-12-09 17:43:50 +02:00
parent ce85a7292f
commit 0c904eae5e
3 changed files with 43 additions and 14 deletions
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server/core/monitor.cc
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@ -1162,6 +1162,7 @@ Monitor::ping_or_connect_to_db(const MonitorServer::ConnectionSettings& sett, SE
mysql_optionsv(pConn, MYSQL_OPT_READ_TIMEOUT, &sett.read_timeout);
mysql_optionsv(pConn, MYSQL_OPT_WRITE_TIMEOUT, &sett.write_timeout);
mysql_optionsv(pConn, MYSQL_PLUGIN_DIR, get_connector_plugindir());
mysql_optionsv(pConn, MARIADB_OPT_MULTI_STATEMENTS, nullptr);
time_t start = time(NULL);
if (mxs_mysql_real_connect(pConn, &server, uname.c_str(), dpwd))