Using :memory: SQLite engine causes DB to be wiped repeatedly

It appears that knex uses a connection pool with an idle timeout when connecting to SQLite in :memory: mode. This causes the database contents to be dropped after ~30s of inactivity (when the connection is closed), making it impossible to use that engine.

This is a particularly bad gotcha because a test suite, or non-interactive usage with something hammering the DB, will work fine.

[zxxc]

Faced same issue but i need pool size more than 1 So my solution is to use shared memory database

const knex = require('knex')({
  client: 'sqlite3',
  connection: { 
    filename: "file:memDb1?mode=memory&cache=shared", 
  },
  useNullAsDefault: true,
  pool: {
    min: 1,
    max: 10,
    disposeTimeout: 360000 * 1000,
    idleTimeoutMillis: 360000 * 1000
  }
});

If two or more distinct but shareable in-memory databases are needed in a single process, then the mode=memory query parameter can be used with a URI filename to create a named in-memory database: rc = sqlite3_open(“file:memdb1?mode=memory&cache=shared”, &db);

[elhigu]

This could work as a workaround which sets timeouts to 100 hours.

knex = require('knex')({
  client: 'sqlite3', 
  connection: ':memory:', 
  pool: { 
    min: 1, 
    max: 1, 
    disposeTimeout: 360000*1000, 
    idleTimeoutMillis: 360000*1000 
}});