Support for attaching databases. The main difference from SQLite is that
we support an arbitrary number of attached databases, and we are not
bound to just 100ish.
We for now only support read-only databases. We open them as read-only,
but also, to keep things simple, we don't patch any of the insert
machinery to resolve foreign tables. So if an insert is tried on an
attached database, it will just fail with a "no such table" error - this
is perfect for now.
The code in core/translate/attach.rs is written by Claude, who also
played a key part in the boilerplate for stuff like the .databases
command and extending the pragma database_list, and also aided me in
the test cases.
This PR adds a const associated value on the VTabModule trait,
`READONLY` defaulted to `true`, so we can bail early when a write
operation is done on an invalid vtable.
This prevents extensions from having to implement `insert`,`update`,
`delete` just to return `Error::ReadOnly`, and prevents us from having
to step through `VUpdate` just to error out.
Reviewed-by: Jussi Saurio <jussi.saurio@gmail.com>
Closes#2247
`BTreeTable::to_sql` makes us incompatible with SQLite by losing e.g. the original whitespace provided during the CREATE TABLE command.
For now let's fix our tests by regex-replacing every CREATE TABLE in
the entire repo to have exactly 1 space after the table name in the
CREATE TABLE statement.
I ended up hitting #1974 today and wanted to fix it. I worked with
Claude to generate a more comprehensive set of queries that could fail
aside from just the insert query described in the issue. He got most of
them right - lots of cases were indeed failing. The ones that were
gibberish, he told me I was absolutely right for pointing out they were
bad.
But alas. With the test cases generated, we can work on fixing it. The
place where the assertion was hit, all we need to do there is return
true (but we assert that this is indeed a string literal, it shouldn't
be anything else at this point).
There are then just a couple of places where we need to make sure we
handle double quotes correctly. We already tested for single quotes in a
couple of places, but never for double quotes.
There is one funny corner case where you can just select "col" from tbl,
and if there is no column "col" on the table, that is treated as a
string literal. We handle that too.
Fixes#1974Closes#2152
I ended up hitting #1974 today and wanted to fix it. I worked with
Claude to generate a more comprehensive set of queries that could fail
aside from just the insert query described in the issue. He got most of
them right - lots of cases were indeed failing. The ones that were
gibberish, he told me I was absolutely right for pointing out they were
bad.
But alas. With the test cases generated, we can work on fixing it. The
place where the assertion was hit, all we need to do there is return
true (but we assert that this is indeed a string literal, it shouldn't
be anything else at this point).
There are then just a couple of places where we need to make sure we
handle double quotes correctly. We already tested for single quotes in a
couple of places, but never for double quotes.
There is one funny corner case where you can just select "col" from tbl,
and if there is no column "col" on the table, that is treated as a
string literal. We handle that too.
Fixes#1974
- Fix not being able to create table while importing
* The behavior now aligns with SQLite so that if the table already
exists, all the rows are treated as data. If the table doesn't exist,
the first row is treated as the header from which column names for the
new table are populated.
- Insert in batches instead of one at a time
This was a pretty quick vibecoding effort tbh :]
Closes#2079Closes#2094
- Fix not being able to create table while importing
* The behavior now aligns with SQLite so that if the table already
exists, all the rows are treated as data. If the table doesn't exist,
the first row is treated as the header from which column names for the
new table are populated.
- Insert in batches instead of one at a time
First step toward resolving
https://github.com/tursodatabase/limbo/issues/1643.
### This PR
With this change, the following two queries are considered equivalent:
```sql
SELECT value FROM generate_series(5, 50);
SELECT value FROM generate_series WHERE start = 5 AND stop = 50;
```
Arguments passed in parentheses to the virtual table name are now
matched to hidden columns.
Additionally, I fixed two bugs related to virtual tables.
### TODO (I'll handle this in a separate PR)
Column references are still not supported as table-valued function
arguments. The only difference is that previously, a query like:
```sql
SELECT one.value, series.value
FROM (SELECT 1 AS value) one, generate_series(one.value, 3) series;
```
would cause a panic. Now, it returns a proper error message instead.
Adding support for column references is more nuanced for two main
reasons:
* We need to ensure that in joins where a TVF depends on other tables,
those other tables are processed first. For example, in:
```sql
SELECT one.value, series.value
FROM generate_series(one.value, 3) series, (SELECT 1 AS value) one;
```
the one table must be processed by the top-level loop, and series must
be nested.
* For outer joins involving TVFs, the arguments must be treated as `ON`
predicates, not `WHERE` predicates.
Reviewed-by: Jussi Saurio <jussi.saurio@gmail.com>
Closes#1727
- `OP_NewRowId` now generates new rowid semi randomly when the largest
rowid in the table is `i64::MAX`.
- Introduced new `LimboError` variant `DatabaseFull` to signify that
database might be full (SQLite behaves this way returning
`SQLITE_FULL`).
Now:
```SQL
turso> CREATE TABLE q(x INTEGER PRIMARY KEY, y);
turso> INSERT INTO q VALUES (9223372036854775807, 1);
turso> INSERT INTO q(y) VALUES (2);
turso> INSERT INTO q(y) VALUES (3);
turso> SELECT * FROM q;
┌─────────────────────┬───┐
│ x │ y │
├─────────────────────┼───┤
│ 1841427626667347484 │ 2 │
├─────────────────────┼───┤
│ 4000338366725695791 │ 3 │
├─────────────────────┼───┤
│ 9223372036854775807 │ 1 │
└─────────────────────┴───┘
```
Fixes: https://github.com/tursodatabase/turso/issues/1977
Reviewed-by: Jussi Saurio <jussi.saurio@gmail.com>
Closes#1985
