alerts_table
ack_table
nameaction_ideven_iduseridtimemediatetypestatuserrorack
history_table
nameitem_idvaluetime
problem_table
alert_id pk
history_id pk
nameeven_idobject_idobject_typegradetimestatusackuserid
ack_id pk
nameobject_idobject_typestatusgradetime
problem_id pk
user_ideven_idactionstatusold_gradenew_grademessagetime
even_id pk
even_table
