diff options
Diffstat (limited to 'sql/log_event.cc')
| -rw-r--r-- | sql/log_event.cc | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sql/log_event.cc b/sql/log_event.cc index ea70c457f94..a326e226320 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -2254,6 +2254,8 @@ Start_log_event_v3::Start_log_event_v3(const char* buf, binlog_version= uint2korr(buf+ST_BINLOG_VER_OFFSET); memcpy(server_version, buf+ST_SERVER_VER_OFFSET, ST_SERVER_VER_LEN); + // prevent overrun if log is corrupted on disk + server_version[ST_SERVER_VER_LEN-1]= 0; created= uint4korr(buf+ST_CREATED_OFFSET); /* We use log_pos to mark if this was an artificial event or not */ artificial_event= (log_pos == 0); @@ -2377,6 +2379,8 @@ Format_description_log_event(uint8 binlog_ver, const char* server_ver) switch (binlog_ver) { case 4: /* MySQL 5.0 */ memcpy(server_version, ::server_version, ST_SERVER_VER_LEN); + DBUG_EXECUTE_IF("pretend_version_50034_in_binlog", + strmov(server_version, "5.0.34");); common_header_len= LOG_EVENT_HEADER_LEN; number_of_event_types= LOG_EVENT_TYPES; /* we'll catch my_malloc() error in is_valid() */ @@ -2467,6 +2471,7 @@ Format_description_log_event(uint8 binlog_ver, const char* server_ver) post_header_len= 0; /* will make is_valid() fail */ break; } + calc_server_version_split(); } @@ -2506,6 +2511,7 @@ Format_description_log_event(const char* buf, post_header_len= (uint8*) my_memdup((byte*)buf+ST_COMMON_HEADER_LEN_OFFSET+1, number_of_event_types* sizeof(*post_header_len), MYF(0)); + calc_server_version_split(); DBUG_VOID_RETURN; } @@ -2606,6 +2612,37 @@ int Format_description_log_event::exec_event(struct st_relay_log_info* rli) } #endif + +/** + Splits the event's 'server_version' string into three numeric pieces stored + into 'server_version_split': + X.Y.Zabc (X,Y,Z numbers, a not a digit) -> {X,Y,Z} + X.Yabc -> {X,Y,0} + Xabc -> {X,0,0} + 'server_version_split' is then used for lookups to find if the server which + created this event has some known bug. +*/ +void Format_description_log_event::calc_server_version_split() +{ + char *p= server_version, *r; + ulong number; + for (uint i= 0; i<=2; i++) + { + number= strtoul(p, &r, 10); + server_version_split[i]= (uchar)number; + DBUG_ASSERT(number < 256); // fit in uchar + p= r; + DBUG_ASSERT(!((i == 0) && (*r != '.'))); // should be true in practice + if (*r == '.') + p++; // skip the dot + } + DBUG_PRINT("info",("Format_description_log_event::server_version_split:" + " '%s' %d %d %d", server_version, + server_version_split[0], + server_version_split[1], server_version_split[2])); +} + + /************************************************************************** Load_log_event methods General note about Load_log_event: the binlogging of LOAD DATA INFILE is |