Azure Devops YAML - Dynamic Condition Evaluation - azure-devops

Question

I am attempting to use a condition to break out of a loop based on the result of a sql query. So I am assigning the query output to a variable "sqloutput" and if that value is empty string go around again. I have confirmed that the query is outputting a value however on subsequent loops the variable is still evaluating to NULL.
Also tried to explicitly declare the variable to no avail.
parameters:
- name: loop
type: object
default : ["1","2","3","4","5","6","7","8","9","10"]
stages:
- stage: WaitforProcessing
displayName: Wait For Processing
jobs:
- deployment: Deployment
pool:
vmImage: ubuntu-latest
environment:
name: 'Client_Data_Tests'
resourceType: VirtualMachine
strategy:
runOnce:
deploy:
steps:
- ${{each Looptimes in parameters.loop}}:
- task: PowerShell#2
name: checkImportProgress${{ Looptimes }}
condition: and(succeeded(), eq(variables['sqloutput'], ''))
displayName: Check if job finished
inputs:
targetType: inline
script: |
$query = "IF EXISTS (select 1 from Job where JobFinishTime is null)
BEGIN
select '' as result
END
ELSE
select '1' as result
"
$sqloutput = Invoke-Sqlcmd -query $query -ServerInstance "$(DB_SERVER)" -Database "$(DB_DATABASE)" -Username "$(DB_USERNAME)" -Password "$(DB_PASSWORD)" -QueryTimeout 36000 -Verbose
$value = $sqloutput["result"]
Write-Host $value
Write-Host "##vso[task.setvariable variable=sqloutput]$value"
- task: PowerShell#2
condition: and(succeeded(), eq(variables['sqloutput'], ''))
displayName: 'Sleep for 30 seconds'
inputs:
targetType: inline
script: |
Start-Sleep 30

Answer 1

The below YAML should work.
stages:
- stage: A
jobs:
- job: A
displayName: SQL generate variable
steps:
- powershell: |
$value = 'somevalue'
echo "##vso[task.setvariable variable=sqloutput;isOutput=true]$value"
name: setvarStep
- script: echo $(setvarStep.sqloutput)
name: echovar
- job: B
dependsOn: A
displayName: Use variable that SQL script output as condition
variables:
myVarFromJobA: $[ dependencies.A.outputs['setvarStep.sqloutput'] ] # map in the variable
myvar: true
condition: eq(variables['myVarFromJobA'],'somevalue')
steps:
- script: echo $(myVarFromJobA)
name: echovar
Result: