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Splunk Incorrectly Extracting Data for Bar Chart

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Hello, I am trying to extract some values with splunk using the rex command. When I extract it, I get values, but some of the values are incorrect. One of my values is 30, but I notice that splunk only seems to extra the "3" from 30 and displays it.

Here is my search:

index=monitoring sourcetype=PEGA:WinEventLog:Application ( SourceName="RoboticLogging" OR SourceName="Application" ) ("Type=" "Information")
| rex "Number of New Employees in NEO Report without job title Temporary Agy Svc Asst:\s*(?<ex>[^4]+?)"

| rex field=_raw "Department=\"(?<dept>.+?)\"" | where dept = "HRSS_NEO" OR dept = "HRSS Daily NEO Report"
| rex field=_raw "Automation=\"(?<auto>.+?)\"" | where auto = "NEO_P_SplunkMetrics"
| bucket _time span=day
| eval Time = strftime(_time, "%b %d, %Y") 
| fields - _time 
| dedup Time
| table Time, ex
| rename ex as "No. of Employees" | sort Time desc

On bar chart, the 30 is shown as a 3. While the 5 is shown as normal. See highlighted.

Attached screen shots of the searches.

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0 Karma
1 Solution

Builder

Your extract is not greedy enough. The question mark tells it to stop as soon as possible.

A better solution to try, which tells it to stop matching at the comma:

| rex "Number of New Employees in NEO Report without job title Temporary Agy Svc Asst:\s*(?<ex>[^,]+)"

View solution in original post

0 Karma

Builder

Be careful with the use of the question mark when extracting, because you may not get everything you expect. Take a look in the posts with the rex or regex tags for great examples. One very useful tactic is to use the not-match. If you know the item you seek is followed by a comma, then match everything that is not a comma, which would be: (?<ex>[^,]+)

This is often much more effective than trying to define everything that does belong in the character class, if you simply know what doesn't belong.

0 Karma

Builder

Your extract is not greedy enough. The question mark tells it to stop as soon as possible.

A better solution to try, which tells it to stop matching at the comma:

| rex "Number of New Employees in NEO Report without job title Temporary Agy Svc Asst:\s*(?<ex>[^,]+)"

View solution in original post

0 Karma
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