Only downstream filters are supported currently, i.e. no result
set filtering can be done.
A crude QLA (Query Log All) filter is included as a test harness only
The option is reloadable in the same way as max_slave_connections parameter. Option value determines which sort function is called before to sort backend server pointers before selecting them and establishing connections to backends.
In practice, 'reload config' reads config file and updates config parameters of rwsplit router service. In addition to that there is a version number indicating what generation of configuration service holds. When router instance is created (when MaxScale is started) service's config version is copied to router intance. Whenever new client connection (rwsplit session) is started, router instance's config version is checked against that of service's. If versions differ, service's config data is copied to router instance. New session will be started with router instance's config values.
query_classifier.cc use of uninitialized value in skygw_stmt_causes_implicit_commit
config.c crashed if module load failed, use of unitialized value
load_utils.c pretty-printed error
service.c use of uninitialized value in service_add_qualified_param
modules.h function prototype
readwritesplit.c memory leaks
Parameter it read from config file to CONFIG_CONTEXT's parameter list. It is qualified in service.c:service_set_slave_conn_limit and if qualified, the qualified integer value and the value type are copied to the CONFIG_PARAMETER structure.
This CONFIG_PARAMETER struct is cloned (=copied to different memory area) and linked to RW Split SERVICE struct.
When RW Split router_instance is created in readwritesplit.c:createInstance, the value is copied to (new) rwsplit_config_t structure from SERVICE's parameter list.
When new routing session is created in readwritesplit.c:newSession, the rwsplit_config_t structure is copied to ROUTER_CLIENT_SES struct and the actual max_nslaves value is calculated from the config value (if percentage is used).
Tests and many error handling branches are missing but functionality seems to be working.
Replaced fprintf's with log write commands, removed the second argument from call of mysql_reset_thd_for_next_command(thd) according to changes in mariadb/5.5/sql/sql_parse.c #rev 3958.
server/Makefile
Instead of installing MaxScale.cnf (and overwriting previous config file), install MaxScale_template.cnf to DEST directory.
config.c
Replace references to 'Gateway' with 'MaxScale', change configuration parameter 'auth' to 'passwd' as it is named in other instances where referenced to password.
- Checked argument types and counts
- Removed trailing line feeds
- Removed thread ids from error logs (they are used in trace / debug log
- Added some state information to dcbs
- Added prefix 'Error' or 'Fatal' to error logs.
- Switches all error logs to use flushing log write.
