Hi good suggestion! Add one configurable option to disable index for no filter and small table scenarios. One comment : you are suggesting only disable MDK; How about other index(inverted index,and MINMAX index)?
+1 for this feature Regards Liang 2016-09-28 6:49 GMT+08:00 Aniket Adnaik <[email protected]>: > Carbondata can provide some way to disable usage of multi-layered index and > provide full table scan. > This may help in following cases; > 1. Small tables occupying only few number of blocks are probably better of > using full table scan. > 2. Queries with large number of projections with no filter may benefit from > using full table scan. > 3. Testing different scenarios and comparing with multiple HDFS file > formats > that do not provide multi layer index will be easier. > > Also, Carbondata scan internally should be smart enough to detect this > based > on query, data size, etc. > > Any comments? > > > > > -- > View this message in context: http://apache-carbondata- > mailing-list-archive.1130556.n5.nabble.com/Discussion- > option-to-disable-multi-layered-index-scan-and-use- > full-table-scan-tp1526.html > Sent from the Apache CarbonData Mailing List archive mailing list archive > at Nabble.com. > -- Regards Liang
