Build SQLite 3.50.3

[saaj]

Upgrades:

• SQLite 3.41.0 → 3.50.3
• SQLite miscellaneous extensions to latest versions
• pivot_vtab extension: to its master commit (fix segfault)
• Docker image for running tests in CI: ubuntu-20.04 → 24.04, switch to Firefox ESR from Mozilla's PPA (otherwise Karma hangs)
• Dockerfile.test: node:12.22-buster → node:12.22-bullseye (Buster repos are dead)

Behaviour change:

WITH input(filename) AS (
  VALUES
    ('/etc/redis/redis.conf'),
    ('/run/redis/redis-server.pid'),
    ('/var/log/redis-server.log')
), tmp AS (
  SELECT
    filename,
    '["' || replace(filename, '/', '", "') || '"]' as filename_array
  FROM input
)
SELECT (
  SELECT group_concat(ip.value, '/')
  FROM json_each(filename_array) ip
  WHERE ip.id <= p.id
) AS path
FROM tmp, json_each(filename_array) AS p
WHERE p.id > 1  -- because the filenames start with the separator

Return empty string for each path, since SQLite 3.47:

Fix the group_concat() aggregate function so that it returns an empty string, not a NULL, if it receives a single input value which is an empty string.

s/WHERE p.id > 1/WHERE p.key > 0/ makes the test query consistent with expected output.

result-analysis.pdf

[lana-k]

#125