Hi, Jeff: Reply inline.
On Tue, Mar 5, 2013 at 11:18 AM, Jeff Yuan <[email protected]> wrote: > I have a couple of questions regarding job result and schema. The > context is that I'm trying to create a custom entry point for Pig that > takes a script, executes it, and always stores the last declared > alias/variable in a file. Would appreciate any insights to the 2 > questions I have below or any advice in general. > > 1. I'm looking to automatically dump or store the last variable/alias > that the user has set. I know PigServer.getAliasKeySet or getAliases > will return a Set or Map of the alias. But they are unordered, is > there a way to get an ordered list of aliases? > Have you try PigServer.getPigContext().getLastAlias()) ? > > 2. I'm interested in getting the result schema and the raw result set. > Is the best way to do this just PigServer.dumpSchema(alias) to get the > result schema, and PigServer.openIterator(alias) to get the resulting > Tuples? > yes, as I know, this is a good way to do it. after you get iterator, you can use below to go through each tuple while(iter.hasNext()) { Tuple t = iter.next(); } > > Thanks, > Jeff > Johnny
