Select Columns

def qapi = api.queryApi()
def productTable = qapi.tables().products()
def sku = productTable.sku()
def label = productTable.label()

return qapi.source(productTable, [sku, label])
        .selectColumns({ prev -> [prev.sku, prev.sku.concat(prev.label).as("skuLabel")] })
        .take(10)
        .stream {
            return it.collect { it }
        }