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Posted to issues@carbondata.apache.org by GitBox <gi...@apache.org> on 2020/08/07 05:20:14 UTC

[GitHub] [carbondata] ajantha-bhat edited a comment on pull request #3773: [CARBONDATA-3830]Presto array columns read support

ajantha-bhat edited a comment on pull request #3773:
URL: https://github.com/apache/carbondata/pull/3773#issuecomment-669844507


   @akkio-97 : update limitations and TODO clearly
   a. with local dictionary arrays cannot be read now
   b. arrays with other complex type is not supported yet
   c. currently, array is row by row filling, not really vector processing.  can use offset vector-like ORC
   https://github.com/prestosql/presto/blob/master/presto-orc/src/main/java/io/prestosql/orc/reader/ListColumnReader.java
   
   I also feel arrayStreamRader and some interface need to cleaned up [I will do it with struct support]


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