However, if you only need a remote transformer, not a remote reducer, custom
SQL function will also work. You can access keys and values in SQL fields
queries using built-in '_key' and '_val' names.

To use a custom SQL function, you need to declare a class which will contain
your custom logic

Next, you need to register this class in cache configuration using
setSqlFunctionClasses method.

After this you can access this function like any other built-in SQL
function, like this: "select pow(_val, 3) from Integer where _val > 5"



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