diff options
Diffstat (limited to 'include/mysql_com.h')
| -rw-r--r-- | include/mysql_com.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/mysql_com.h b/include/mysql_com.h index c0f350d2bcf..4a28e145546 100644 --- a/include/mysql_com.h +++ b/include/mysql_com.h @@ -34,6 +34,31 @@ #define MYSQL50_TABLE_NAME_PREFIX_LENGTH (sizeof(MYSQL50_TABLE_NAME_PREFIX)-1) #define SAFE_NAME_LEN (NAME_LEN + MYSQL50_TABLE_NAME_PREFIX_LENGTH) +/* + MDEV-4088 + + MySQL (and MariaDB 5.x before the fix) was using the first character of the + server version string (as sent in the first handshake protocol packet) to + decide on the replication event formats. And for 10.x the first character + is "1", which the slave thought comes from some ancient 1.x version + (ignoring the fact that the first ever MySQL version was 3.x). + + To support replication to these old clients, we fake the version in the + first handshake protocol packet to start from "5.5.5-" (for example, + it might be "5.5.5-10.0.1-MariaDB-debug-log". + + On the client side we remove this fake version prefix to restore the + correct server version. The version "5.5.5" did not support + pluggable authentication, so any version starting from "5.5.5-" and + claiming to support pluggable auth, must be using this fake prefix. +*/ +#ifdef EMBEDDED_LIBRARY +#define RPL_VERSION_HACK "" +#else +/* this version must be the one that *does not* support pluggable auth */ +#define RPL_VERSION_HACK "5.5.5-" +#endif + #define SERVER_VERSION_LENGTH 60 #define SQLSTATE_LENGTH 5 #define LIST_PROCESS_HOST_LEN 64 |