Observed_at() function

The observed_at() function returns the date that a node was last observed.

Syntax

The observed_at() function returns a string and takes a tree parameter:

string observed_at(tree input)

Examples

You can try the following examples against your own data in the GoToAssist search field, or against fictitious data in the Query Sandbox:

• Example 1: Date traffic was last seen
• Example 2: Date software last checked
• Example 3: Time of last disk space check

Example 1: Date traffic was last seen

Query: When was the last time the traffic was observed?

SELECT observed_at 
FROM /network/device/interface/in_octets

Results: Depending on the database, this query returns results similar to this:

row
   observed_at(in_octets) 2008-06-12T03:32:17.000000Z
row
   observed_at(in_octets) 2008-06-12T03:32:17.000000Z
row
   observed_at(in_octets) 2008-06-12T03:05:25.000000Z 
   . . .

Example 2: Date software last checked

Query: When was the software installed since January 1st last checked?

SELECT name, observed_at(name)
FROM /network/device/wmi/win32_product 
WHERE installdate > '20080101'

Results: Depending on the database, this query returns results similar to this:

row
   name Altoworks Crawler
   observed_at(name) 2008-04-19T00:35:30.670602Z
row
   name Windows Media Encoder 9 Series
   observed_at(name) 2008-05-05T22:21:17.984139Z
row
   name Microsoft .NET Framework 2.0 Service Pack 1
   observed_at(name) 2008-05-05T22:21:17.984139Z 
   . . .

Example 3: Time of last disk space check

Query: When was the last time systems were checked for low disk space?

SELECT observed_at(systemname) 
FROM %free disk space% 
WHERE freespace < 1000000000
AND description = 'Local Fixed Disk'

Results: Depending on the database, this query returns results similar to this:

row
   observed_at(systemname) 2008-06-12T18:39:41.000000Z
row
   observed_at(systemname) 2008-06-10T01:30:59.000000Z
row
   observed_at(systemname) 2008-06-11T22:43:12.000000Z
row
   observed_at(systemname) 2008-06-11T23:09:19.000000Z 

To see other PQL functions, see Functions.

Related topics

• Functions
• Operators
• Expressions
• Read about PQL

| Views: 1069 | Last Updated: Thu, May 09 2013 2:28 PM

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