That's pretty much the only disagreement with the SQLite developer, who is an amazing guy that wrote an amazing tool!
Another thing I dislike is the lack of timestamp types. Instead, you're expected to just use a text column and store a textual timestamp. Even worse, instead of using ISO, the standard date time functions produce strings on the form "yyyy-mm-dd HH:MM:SS" which you're just supposed to assume are in UTC. Why not at least give us "yyyy-mm-ddTHH:MM:SSZ"? Or, you know, a proper space efficient timestamp data type.
A truly great project, with some truly baffling design decisions.
What is least surprising? That INTEGER implicity accepts 'hello world' without error, or that you can't insert such a value unless you use a keyword like NONSTRICT or a type like ANY?
I would wager the vast majority of SQLite users if asked would probably not expect it to work.
Strict should really be the default. If a database is shared by multiple applications then you should be able to rely on the declared data type. If one application stores a string into a numeric column that breaks everyone else.
On the other hand, the main use case for SQLite is embedded databases. And that means only one application is using the database. In that scenario being able to evolve the schema (as opposed to creating a new database and copying the data over) can be seen as an advantage. The application's code knows what to expect in each column--including mixed data types.
tehlike•56m ago
poidos•48m ago
> SQLite strives to be flexible regarding the datatype of the content that it stores.
[0]: https://sqlite.org/stricttables.html
tuvix•48m ago
pstuart•38m ago
notRobot•36m ago
rogerbinns•18m ago
TCL was used as a dev wrapper language at the time, and it functioned the same way.
It was only in mid-2004 that SQLite 3 was released which used its own storage backend, and that allowed for the 5 supported storage types (int64, string, bytes, float, null). It was API compatible (with minor adjustments) with the earlier SQLite 2, so the lack of static typing continued, otherwise everyone would have to rewrite their code. You do get dynamic typing, which hasn't been a problem for the vast majority of SQLite users.
Do remember that SQLite is competition for fopen, not Oracle / Postgres etc. It is trying to make things as effective as possible in that scenario. If you don't want numbers in your string column, then don't do that!