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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2021/01/20 10:05:53 UTC

[GitHub] [incubator-doris] sileiH opened a new issue #5272: Bitmap with union And bitmap_intersect

sileiH opened a new issue #5272:
URL: https://github.com/apache/incubator-doris/issues/5272


   **Describe the bug**
   1）Bitmap does not support UNIONS
   2）The bitmap_intersect function always returns a value of 0
   
   **To Reproduce**
   Steps to reproduce the behavior:
   1）
   ```
   SELECT
   bitmap_from_string ('1,2,3,4,5') AS a
   UNION
   SELECT
   bitmap_from_string ('1,2,3,4,5,6') AS a
   ```
   
   2）
   ```
   select 	bitmap_count(bitmap_intersect(fid_bitmap)) from
   feature_bitmap_tmp where feature_value = '1' or feature_value = '2'
   ```
   
   use Doris-0.13.15 and Doris-0.12.13


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[GitHub] [incubator-doris] EmmyMiao87 commented on issue #5272: Bitmap with union And bitmap_intersect

Posted by GitBox <gi...@apache.org>.
EmmyMiao87 commented on issue #5272:
URL: https://github.com/apache/incubator-doris/issues/5272#issuecomment-775637290


   In fact, Doris supports the union of bitmap, and the query method is bitmap_union. To find the union of multiple bitmap values.
   
   The union of bitmap is actually supported, or can you give a complete example of the final calculation error of the original data?


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