If VCs are not on query, it'll not be made in ExecMapper from start. If you can do something with Reporter instance in MR, https://issues.apache.org/jira/browse/HIVE-3628 would be helpful.
2013/5/30 Peter Marron <peter.mar...@trilliumsoftware.com>: > Hi, > > > > Using Hive 0.10.0 over Hadoop 1.0.4. > > > > I guess that I know that this is a long shot. > > Is there any way to access the context from inside a UDF? > > Specifically I want to get hold of the value of the virtual > > column BLOCK__OFFSET__INSIDE__FILE from inside a > > UDF that I’m implementing. Of course I can pass it in as > > a parameter but it would be nice if I didn’t have to. > > So is there some way I can interrogate the value of this column? > > Or, seeing as I can, that the value of the virtual column > > is set using the value of > > ctx.getIoCxt().getCurrentBlockStart(); > > where ctx is an ExecMapperContext > > is there some way that I can get hold of this > > directly? Can the UDF get hold of the ExecMapperContext? > > > > Thanks in advance. > > > > Z > > > >
