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Kris82_167334's avatar
Kris82_167334
Icon for Nimbostratus rankNimbostratus
Apr 30, 2015

Checking session subtable in IRule

What is the correct way of checking if a session subtable with given name exists in IRule ?   In the use case I am working I need to distinguish between a subtable which has no rows and a subtable...
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samstep's avatar
samstep
Icon for Cirrocumulus rankCirrocumulus
Apr 30, 2015

I don't think it is possible to distinguish, why would you need to do that? I believe a subtable with all keys removed simply ceases to exist...

 

if {[table keys -subtable sometable -count] ==0} { subtable is empty or does not exist }

 

if you really need to do this then you can place a dummy key in your subtable and ccheck for it using "-mustexist" option.

 

Extract from Wiki: https://devcentral.f5.com/wiki/iRules.table.ashx?lc=1

 

" If -mustexist is specified, and the key does not already exist, no action will be taken, and an empty string will be returned. Cannot be specified with -excl.If -excl is specified, and the key already exists, the key will not be inserted, and the existing value will be returned. Cannot be specified with -mustexist. "

 

Hope this helps,

 

Sam