Initially, an attribute reference (column reference), like selecting a column from a table, is not resolved since we do not know if the reference is valid or not (if this column exists in the underlying table). In the query compilation process, we will first analyze this query and resolved those attribute references. A resolved attribute reference means that this reference is valid and we know where to get the column values from the input. Hope this is helpful.
On Tue, Mar 17, 2015 at 2:19 PM, Ophir Cohen <[email protected]> wrote: > Thanks you for the answer and one more question: what does it mean > 'resolved attribute'? > On Mar 17, 2015 8:14 PM, "Yin Huai" <[email protected]> wrote: > >> The number is an id we used internally to identify an resolved Attribute. >> Looks like basic_null_diluted_d was not resolved since there is no id >> associated with it. >> >> On Tue, Mar 17, 2015 at 2:08 PM, Ophir Cohen <[email protected]> wrote: >> >>> Interesting, I thought the problem is with the method itself. >>> I will check it soon and update. >>> Can you elaborate what does it mean the # and the number? Is that a >>> reference to the field in the rdd? >>> Thank you, >>> Ophir >>> On Mar 17, 2015 7:06 PM, "Yin Huai" <[email protected]> wrote: >>> >>>> Seems "basic_null_diluted_d" was not resolved? Can you check if >>>> basic_null_diluted_d is in you table? >>>> >>>> On Tue, Mar 17, 2015 at 9:34 AM, Ophir Cohen <[email protected]> wrote: >>>> >>>>> Hi Guys, >>>>> I'm registering a function using: >>>>> sqlc.registerFunction("makeEstEntry",ReutersDataFunctions.makeEstEntry >>>>> _) >>>>> >>>>> Then I register the table and try to query the table using that >>>>> function and I get: >>>>> org.apache.spark.sql.catalyst.errors.package$TreeNodeException: >>>>> Unresolved attributes: >>>>> 'makeEstEntry(numest#20,median#21,mean#22,stddev#23,high#24,low#25,currency_#26,units#27,'basic_null_diluted_d) >>>>> AS FY0#2837, tree: >>>>> >>>>> Thanks! >>>>> Ophir >>>>> >>>> >>>> >>
