Hi, I have written a custom UDF that I want to be executed on a single reducer when I am using it in a query. Following is the the query and I want to confirm whether this would always always execute the UDF on a single reducer (assuming the ORDER BY would send all the rows to a single reducer):
*SELECT UDF(<col>) AS alias from * *( SELECT <col> * * FROM <table> TABLESAMPLE (x PERCENT) * * ORDER BY <col> )* *ORDER BY alias;* Is it a possibility that the UDF is executed on a mapper? -- Thanks Vaibhav Jain
