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MXS-1639 Discard results when executing sql text files

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This removes the limitation of not returning resultsets.
This commit is contained in:
Esa Korhonen
2018-04-24 10:59:00 +03:00
parent fa7cd9450a
commit 2a38902aa6
2 changed files with 17 additions and 5 deletions
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13
Documentation/Monitors/MariaDB-Monitor.md
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@ -446,10 +446,15 @@ servers_no_promotion=backup_dc_server1,backup_dc_server2
#### `promotion_sql_file` and `demotion_sql_file` #### `promotion_sql_file` and `demotion_sql_file`
These are paths to text files with SQL statements in them. During promotion or These optional settings are paths to text files with SQL statements in them.
demotion, the contents are read line-by-line and executed on the backend. Empty During promotion or demotion, the contents are read line-by-line and executed on
lines or lines starting with '#' are ignored. All statements must succeed and the backend. Use these settings to execute custom statements on the servers to
none may return results, otherwise the switchover or failover fails. complement the built-in operations.
Empty lines or lines starting with '#' are ignored. Any results returned by the
statements are ignored. All statements must succeed for the failover, switchover
or rejoin to continue. The monitor user may require additional privileges and
grants for the custom commands to succeed.
When promoting a slave to master during switchover or failover, the When promoting a slave to master during switchover or failover, the
`promotion_sql_file` is read and executed on the new master server after its `promotion_sql_file` is read and executed on the new master server after its

9
server/modules/monitor/mariadbmon/mariadbmon.cc
View File

@ -4919,7 +4919,8 @@ static int64_t scan_server_id(const char* id_string)
} }
/** /**
* Read the file contents and send them as sql queries to the server. Queries should not return any data. * Read the file contents and send them as sql queries to the server. Any data returned by the queries is
* discarded.
* *
* @param server Server to send queries to * @param server Server to send queries to
* @param path Text file path. * @param path Text file path.
@ -4953,6 +4954,12 @@ static bool run_sql_from_file(MXS_MONITORED_SERVER* server, const string& path,
if (mxs_mysql_query(conn, line.c_str()) == 0) if (mxs_mysql_query(conn, line.c_str()) == 0)
{ {
lines_executed++; lines_executed++;
// Discard results if any.
MYSQL_RES* res = mysql_store_result(conn);
if (res != NULL)
{
mysql_free_result(res);
}
} }
else else
{ {