Extract Fact Table Distinct Columns problem

[仇同心]

Kylin crew:

   “Extract Fact Table Distinct Columns”, In this step will often happen OOM,I 
don't know what this step is doing, Can do a simple function description?

In this FactDistinctColumnsJob.class , Line 80 ,List<TblColRef> columnsNeedDict 
= cubeMgr.getAllDictColumnsOnFact(cubeDesc) : The method to realize the 
function of what.




Thanks!