> On Jan 8, 2025, at 11:30, Igor Korot <ikoro...@gmail.com> wrote:
> There is no boolean - it is 0-4 inclusive.

Unless you have somehow gotten PostgreSQL running on an IBM 7070, the range 0-4 
can be represented by three binary digits, aka booleans. :-)

To be serious, though, the situation is:

1. If there are just one or two tinyints, having a tinyint type wouldn't save 
any space in the row.
2. If there are a lot of them, it's worth encoding them into a bitstring.

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