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MXS-1466: Add support for new variables: @@log_bin, @@max_connections, @@gtid_strict_mode etc

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MXS-1466: Add support for new variables: @log_bin, @@max_connections,
@@gtid_strict_mode etc
This commit is contained in:
MassimilianoPinto 2017-10-09 18:57:23 +02:00
parent df816ea2a9
commit 69cddb2695
2 changed files with 62 additions and 3 deletions
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3
server/modules/routing/binlogrouter/blr.h
View File

@ -229,6 +229,9 @@ typedef enum
#define BLR_MASTER_CONNECT_RETRY "60"
#define BLR_MASTER_RETRY_COUNT "1000"
/* Default value for @@max_connections SQL var */
#define BLR_DEFAULT_MAX_CONNS 151
/* max size for error message returned to client */
#define BINLOG_ERROR_MSG_LEN 700

62
server/modules/routing/binlogrouter/blr_slave.c
View File

@ -6393,12 +6393,17 @@ static bool blr_handle_simple_select_stmt(ROUTER_INSTANCE *router,
BLR_TYPE_INT);
return true;
}
/* Handle MariaDB 10 GTID vars */
else if ((strcasecmp(word, "@@gtid_current_pos") == 0) ||
(strcasecmp(word, "@@global.gtid_current_pos") == 0))
(strcasecmp(word, "@@global.gtid_current_pos") == 0) ||
(strcasecmp(word, "@@gtid_binlog_pos") == 0) ||
(strcasecmp(word, "@@global.gtid_binlog_pos") == 0) ||
(strcasecmp(word, "@@gtid_slave_pos") == 0) ||
(strcasecmp(word, "@@global.gtid_slave_pos") == 0))
{
char heading[40];
char mariadb_gtid[GTID_MAX_LEN + 1];
mariadb_gtid[0] = '\0';
mariadb_gtid[0] = 0;
strcpy(heading, word);
if (router->mariadb10_compat &&
@ -6409,6 +6414,13 @@ static bool blr_handle_simple_select_stmt(ROUTER_INSTANCE *router,
spinlock_release(&router->binlog_lock);
}
/* Return empty gtid_slave_pos if master GTID registration is off */
if (!router->mariadb10_master_gtid &&
strcasestr(word, "gtid_slave_pos" ) != NULL)
{
mariadb_gtid[0] = 0;
}
blr_slave_send_var_value(router,
slave,
heading,
@ -6437,6 +6449,50 @@ static bool blr_handle_simple_select_stmt(ROUTER_INSTANCE *router,
return true;
}
}
else if ((strcasecmp(word, "@@global.max_connections") == 0) ||
(strcasecmp(word, "@@max_connections") == 0))
{
char max_conns[40];
/* to ensure we match the case in query and response */
char heading[40];
sprintf(max_conns, "%d", !router->service->max_connections ?
BLR_DEFAULT_MAX_CONNS :
router->service->max_connections);
strcpy(heading, word);
blr_slave_send_var_value(router,
slave,
heading,
max_conns,
BLR_TYPE_INT);
}
else if ((strcasecmp(word, "@@global.read_only") == 0) ||
(strcasecmp(word, "@@read_only") == 0))
{
/* to ensure we match the case in query and response */
char heading[40];
strcpy(heading, word);
blr_slave_send_var_value(router,
slave,
heading,
"0",
BLR_TYPE_INT);
}
else if ((strcasecmp(word, "@@global.log_bin") == 0) ||
(strcasecmp(word, "@@log_bin") == 0))
{
/* to ensure we match the case in query and response */
char heading[40];
strcpy(heading, word);
blr_slave_send_var_value(router,
slave,
heading,
"1",
BLR_TYPE_INT);
}
return false;
}
@ -7463,7 +7519,7 @@ static bool blr_handle_set_stmt(ROUTER_INSTANCE *router,
return true;
}
}
else if (strstr(word, "@slave_connect_state") != NULL)
else if (strcasestr(word, "@slave_connect_state") != NULL)
{
/* If not mariadb an error message will be returned */
if (slave->mariadb10_compat &&