Append a column based on conditions

[rojit]

I have a log file as below:

** Time  Event_Type          Event_Name**
-------------------------------------------------------------
time1  Event              Event1
time2  Event              Event2
time3  Event              Event3
time4  DBError          SQLErrCode1
time5  DBError          SQLErrCode2
time6  Event              Event4
time7  Event              Event5
time8  DBError          SQLErrCode3

....
In the above logs, each DBError is caused by the Event just before that DBError

Requirement is I need a result as below:

time4  DBError  SQLErrCode1 Event3
time5  DBError  SQLErrCode2 Event3
time8  DBError  SQLErrCode3 Event5

Appreciate your help ...

[somesoni2]

Give this a try

your current search giving columns Time, Event_Type, Event_Name
| streamstats current=f window=1 values(Event_Name) as prev_EventName 
| where Event_Type="DBError" 
| filldown prev_EventName

OR (in case above doesn't work due to event ordering)

your current search giving columns Time, Event_Type, Event_Name
| reverse | streamstats current=f window=1 values(Event_Name) as prev_EventName 
| where Event_Type="DBError" 
| filldown prev_EventName

[rojit]

Thanks for the response..
Well, my question is partially answered here.

From the above solutions, I am getting the results for time5 as
time5 DBError SQLErrCode2 SQLErrCode1

whereas I am expecting
time5 DBError SQLErrCode2 Event3

For time4 and time8, its coming as expected
(Edited the dataset lil bit for getting it more clear)

I would like to know whether we can add conditions to streamstats?