PIG: TEZ as execution at job level
PIG derives execution engine from pig.properties which is at cluster level.
If you want a job level granularity PIG CLI doesn't support it yet. But can achieve it if the jobs are submitted through Templeton.
Example of PowerShell usage
New-AzureHDInsightPigJobDefinition -Query $QueryString -StatusFolder $statusFolder -Arguments @("-x”, “tez")
Example of CURL usage
curl -s -d file=<file name> -d arg=-v -d arg=-x -d arg=tez 'https://<dnsname.azurehdinsight.net>/templeton/v1/pig?user.name=admin'