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COOL-cohort / COOL

the source code of the COOL system
https://www.comp.nus.edu.sg/~dbsystem/cool/
Apache License 2.0
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System can not well support the `NULL` value #65

Open KimballCai opened 2 years ago

KimballCai commented 2 years ago

Currently, the COOL system cannot support the NULL value in the INT type columns, and it will assign NULL as a separate class for String type columns.

Maybe we can add bit maps to deal with NULL values.

KimballCai commented 2 years ago

@Zrealshadow please submit your code repo for this issue and @hugy718 please continue this progress.