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To run the tool, point it at a segment directory and provide a file for writing output:
Data dumps
For example, one line might look like this when pretty-printed:
Metadata dumps
Bitmap dumps
With --dump bitmaps, this tool dump bitmap indexes instead of rows. Bitmap dumps generated by this tool include dictionary-encoded string columns only. The output contains a field “bitmapSerdeFactory” describing the type of bitmaps used in the segment, and a field “bitmaps” containing the bitmaps for each value of each column. These are base64 encoded by default, but you can also dump them as lists of row numbers with .
Sample output:
