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Bitmap index

There is a configuration parameter that is introduced for this feature named BitmapIndexSupport which default value is comment, then the sample input and output are as follows:

Input – Bitmap index

CREATE BITMAP INDEX 
emp_bitmap_idx
ON index_demo (gender);

Output

/*CREATE BITMAP INDEX emp_bitmap_idx ON index_demo (gender);*/

However, if the configuration parameter is set to BTREE, then the output is as follows:

Output

CREATE
     /*bitmap*/
     INDEX emp_bitmap_idx
          ON index_demo
          USING btree (gender) ;