Re: Query Routing/ Load Balancing / asynchronous callbacks - KX Learning Hub

simon_watson_sj

Member
May 11, 2022 at 12:00 am
Hey David – updates!

I think the Query Router white paper might have a couple of quirks that are me causing issues. (Although at the moment I feel like the guy in the 2000’s who blames Bill Gates when he stuffs up is VB code)

I think the main issue is this:
```
returnRes:{[res] uh:first exec uh from queryTable where sq=(res 0); // (res 0) is the sequence number if[not null uh;(neg uh)(res 1)]; // (res 1) is the result queryTable[(res 0);`ret]:.z.p }
```
In particular:
```
(neg uh)(res 1)
```
I think res causes a `Type failure because it needs to be a string. I’ve tried:
```
(neg uh) .Q.s1 (res 1)
```
but that doesn’t return anything that shows up anywhere. Interestingly, if I do something like (neg uh)”foo:123″;(neg uh)””;

from the gateway, then I do get a variable called foo with that value on the client.

My next attempt will be to either adjust the query process so it assigns return data to a variable or go through the async paper again and see what the standard method is.

I will let you know how I go.

Simon