question Re: How to capture number 0 in RouteOnAttribute in Support Questions

How to capture number 0 in RouteOnAttribute

vamcits — Mon, 11 Nov 2019 20:29:33 GMT

Hi,

I have a requirement where-in I have to take a count(*) using selecthiveQL and if count is 0 then I have to insert a row.

My flow is selectHive QL → RouteOnAttribute where in I am trying to capture the 0

Json is as below:

[ {
"_c0" : 0
} ]

can some one please tell me how to capture this zero, I tried multiple ways but not able to.

Also if anyone has better solution pls let me know. This is quite urgent.

Re: How to capture number 0 in RouteOnAttribute

MattWho — Tue, 12 Nov 2019 17:35:27 GMT

@vamcits

You can use EvaluateJsonPath processor to extract the 0 from the json you shared

You can name the custom property added above to whatever you like (I just used C0).
This will result in a "C0" attribute being generated on the FlowFile with a value of "[0]".

If you don't wan the square brackets around the number, you can remove them using an updateAttribute processor as follows:

Then you can perform your routing with the RouteOnAttribute processor.

Hope this helps,
Matt