common table expressions about bayeslite

[gregory-marton]

In particular, what version of sqlite3 does it require? What's the feature that's needed?

[gregory-marton]

Does apsw support it?
#92

[riastradh-probcomp]

This requires sqlite3 >=3.8.3, whereas Ubuntu 14.04 has 3.8.2. The feature is what I named and quoted, and is documented at https://www.sqlite.org/lang_with.html. It is basically let for tables.

[riastradh-probcomp]

And no, apsw doesn't help -- it's sqlite3 itself, not the Python sqlite3 module, that needs CTE.

[riastradh-probcomp]

(and the version of apsw in Ubuntu 14.04 is built with the same version of sqlite3 as the version of sqlite3 in Ubuntu 14.04)

[riastradh-probcomp]

We no longer necessarily rely on the system sqlite3. It would still be nice to be able to use it, to reduce the number of external dependencies that are not managed by apt (in particular, bayeslite-apsw), but that matters less now.