Added a parsing function to query classifier that returns an array of database names the query uses.
Added a check if the query targets a sharded database. If so, a hint is added that routes the query to the named server.
mysql_mon.c: Added back server state logging to Debug build.
query_classifier.cc: removed some extra debug code, cleaned up a bit function documentation.
mysql_client_server_protocol.h, mysql_backend.c, mysql_common.c: changed some variables to signed ones to enable checking of calculations in the code.
skygw_utils.cc: removed erroneous debug assertion.
void session_enable_log(SESSION* ses, logfile_id_t id)
and
void session_disable_log(SESSION* ses, logfile_id_t id)
Which switch specific log type on/off if the log type in question is not generally enabled.
Each thread carries a thread-specific struct log_info_t which includes members for current session id and bitfield for enabled log types for the current session. That information is checked before actual log write functions are called.
Each file where session-specific logging is used, must include the following exports:
/** Defined in log_manager.cc */
extern int lm_enabled_logfiles_bitmask;
extern size_t log_ses_count[];
extern __thread log_info_t tls_log_info;
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Also includes a fix to a bug caused by a previous Coverity error change in canonizer.c
Main assumed multi-byte characters in memory allocation but not outside of it so I removed that code and made it consistently assume single-byte characters.
Terminating character was added always to the last byte of string buffer regardless of the length of the string. Removed it and replaced malloc with calloc.
Moved variable introductions from the middle of the function to the beginning of it.
String buffer allocation didn't allocate space for terminating char. It also assumed that character size may vary but the rest of the code didn't support multi-byte characters so I changed it consistently assume single-byte characters.
query_classifier.cc: added function for printing combined query type from a bit field.
query_classifier.h: identify query types SHOW DATABASE, and SHOW TABLES to make log entries more understandable.
mysql_common.c: moved some trace log commands to debug log.
readwritesplit.c: moved some trace logs to debug log, added trace log commands to gather routing, query type and session information to one log entry.
skygw_debug.h: added string macros for several query and hint types.
