Hi Manish, Please add impact area for block pruning and data query.
-Regards Kumar Vishal On Fri, Mar 10, 2017 at 12:56 PM, manish gupta <tomanishgupt...@gmail.com> wrote: > Hi Liang, > > Thanks for reviewing the document. Please find my answers inline. > > 1.For "change of data type" , whether only support from INT to BIGINT, or > not ? > - Yes as part of initial feature development we will support only > upcasting the datatype INT to BIGINT and decimal datatype change from > lower to higher precision. > > 2.Whether support adjust the order of columns for MDK , and make compaction > to resort data as per the new order of columns , or not ? > - Currently addition of column is supported only at the end. From my > opinion once this is stable, we can further extend it to support reordering > of columns to change the MDKEY order. > > Regards > Manish Gupta > > On Fri, Mar 10, 2017 at 5:20 AM, Liang Chen <chenliang6...@gmail.com> > wrote: > > > Hi > > > > Thanks for you started this discussion for alter table feature. > > > > A couple of comments: > > 1.For "change of data type" , whether only support from INT to BIGINT, or > > not ? > > 2.Whether support adjust the order of columns for MDK , and make > compaction > > to resort data as per the new order of columns , or not ? > > > > Regards > > Liang > > > > 2017-03-09 21:00 GMT+08:00 manish gupta <tomanishgupt...@gmail.com>: > > > > > Hi All, > > > > > > Currently in carbondata after a table is created once it becomes > > immutable. > > > Deletion or addition of column is not supported because of which the > same > > > table and data cannot be used again. To add more flexibility to the > > > carbondata system alter table support needs to be added to carbondata > > > system. > > > > > > > > > Please refer the design document at below location and share your > > > suggestions. > > > > > > > > > https://drive.google.com/file/d/0B1DnrpMgGOu9dGxYMzVJUXEyZG8/ > > > view?usp=sharing > > > > > > > > > Regards > > > > > > Manish Gupta > > > > > > > > > > > -- > > Regards > > Liang > > >
