This PR fixes
[#1040](https://github.com/tursodatabase/limbo/issues/1040) and modifies
the `LIKE` function in the VDBE to work on expressions of all types like
SQLite.
Looking at how SQLite handles this, it gets the text value of the
expression regardless of its affinity. I used `exec_cast(exp, "TEXT")`
to achieve the same effect. Since most `LIKE` queries will probably be
done on `TEXT` expressions, I avoid casting the expression if it's
already `TEXT`. If either of the expressions was `NULL`, SQLite returns
nothing i.e. `NULL`. I also changed the unreachable arm message from
`Like on non-text registers` to `Like failed`.
The following queries produced the same results in Limbo:
```
SQLite version 3.46.1 2024-08-13 09:16:08 (UTF-16 console I/O)
Enter ".help" for usage hints.
Connected to a transient in-memory database.
Use ".open FILENAME" to reopen on a persistent database.
sqlite> CREATE TABLE tbl (n NULL, i INTEGER, r REAL, t TEXT, b BLOB);
sqlite> INSERT INTO tbl VALUES(NULL,1,2.0,'a',X'0500');
sqlite> SELECT * FROM tbl;
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE n LIKE NULL;
sqlite> SELECT * FROM tbl WHERE n LIKE 'NULL';
sqlite> SELECT * FROM tbl WHERE n LIKE 1;
sqlite> SELECT * FROM tbl WHERE n LIKE 2.0;
sqlite> SELECT * FROM tbl WHERE n LIKE x'0500';
sqlite>
sqlite> SELECT * FROM tbl WHERE i LIKE NULL;
sqlite> SELECT * FROM tbl WHERE i LIKE 1;
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE i LIKE '1';
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE i LIKE 2.0;
sqlite> SELECT * FROM tbl WHERE i LIKE 1.0;
sqlite> SELECT * FROM tbl WHERE i LIKE x'0500';
sqlite>
sqlite> SELECT * FROM tbl WHERE r LIKE NULL;
sqlite> SELECT * FROM tbl WHERE r LIKE 2;
sqlite> SELECT * FROM tbl WHERE r LIKE 2.0;
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE r LIKE '2.0';
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE r LIKE 'a';
sqlite> SELECT * FROM tbl WHERE r LIKE x'0500';
sqlite>
sqlite> SELECT * FROM tbl WHERE t LIKE NULL;
sqlite> SELECT * FROM tbl WHERE t LIKE 1;
sqlite> SELECT * FROM tbl WHERE t LIKE 2.0;
sqlite> SELECT * FROM tbl WHERE t LIKE 'a';
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE t LIKE x'0500';
sqlite>
sqlite> SELECT * FROM tbl WHERE b LIKE NULL;
sqlite> SELECT * FROM tbl WHERE b LIKE 1;
sqlite> SELECT * FROM tbl WHERE b LIKE 2.0;
sqlite> SELECT * FROM tbl WHERE b LIKE 'a';
sqlite> SELECT * FROM tbl WHERE b LIKE x'0500';
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE b LIKE 'x''0500''';
sqlite> SELECT * FROM tbl WHERE b LIKE '♣';
sqlite>
sqlite> SELECT * FROM tbl WHERE 1 LIKE 1;
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE 2.0 LIKE 2.0;
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE 2.0 LIKE '2.0';
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE '2.0' LIKE 2.0;
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE '123.45' LIKE 123.45;
|1|2.0|a|♣
sqlite> SELECT * FROM tbl WHERE NULL LIKE NULL;
sqlite> SELECT * FROM tbl WHERE x'0500' LIKE x'0500';
|1|2.0|a|♣
sqlite> SELECT typeof(n), typeof(i), typeof(r), typeof(t), typeof(b) FROM tbl;
null|integer|real|text|blob
```
Though, these queries are very basic, and more testing could be done.
Closes#1044
Modified `cast_text_to_number` to be more compatible with SQLite. When
I was running some fuzz tests, I would eventually get errors due to
incorrect casting of text to `INTEGER` or `REAL`. Previously in code
there were 2 implementations of `cast_text_to_number`: one in
`core/vdbe/insn.rs` and one in `core/vdbe/mod.rs`. I consolidated the
casting to only one function. Previously, the `mod.rs` function was just
calling `checked_cast_text_to_numeric`, which was used in `MustBeInt`
opcode. Hopefully this fixes some of the CI testing issues we are
having. This was the query that prompted me to do this: `SELECT ( ( (
878352367 ) <> ( 29 ) ) ) = ( ( ( -4309097 ) / ( -37 || -149680985265412
) ) - 755066415 );`
Closes#1038
closes#977
In order to properly get #960 merged and keep some sort of the same API
we have now, we need to support URIs/query parameters for opening new
databases.
This PR doesn't attempt to implement anything useful with this, it only
handles parsing, but it will allow #960 to properly open a new file with
a specific VFS without having to entirely re-design the `open_file`
method/API. The existing option in that PR right now is less than ideal.
e.g. All of the existing methods already accept an `IO` impl
```rust
pub fn open_file(io: Arc<dyn IO>, path: &str) -> Result<Arc<Database>> {
// or
pub fn open(
io: Arc<dyn IO>,
page_io: Rc<dyn DatabaseStorage>,
wal: Rc<RefCell<dyn Wal>>,
shared_wal: Arc<RwLock<WalFileShared>>,
buffer_pool: Rc<BufferPool>,
) -> Result<Arc<Database>> {
```
Right now, most of the parsed query parameters are not options we
support yet, but I figured it's better to handle parsing them now and
using them later on when we support them.
Also, if this looks way overly complicated for what it does... that's
because the cross platform edge-cases are a super pain in the ass.
Closes#1039
This is a first step to supporting [sqlite column
affinity](https://www.sqlite.org/datatype3.html) properly in limbo --
just adds an `affinity()` function to `Column` that can then be used
elsewhere
Closes#1030
Fix#1012
In the INSERT statement generated by dump function, if the type affinity
of the value is TEXT, replace each single quotation mark with two single
quotation marks, and wrap it with single quotation marks.
Example:
```plaintext
limbo> CREATE TABLE users (id INT PRIMARY KEY, name VARCHAR(100));
INSERT INTO users (id, name) VALUES
(1, 'Alice'),
(2, 'Bob'),
(3, 'Char''lie');
SELECT * FROM users;
1|Alice
2|Bob
3|Char'lie
limbo> .dump
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE users (id INT PRIMARY KEY, name VARCHAR (100));
INSERT INTO users VALUES(1,'Alice');
INSERT INTO users VALUES(2,'Bob');
INSERT INTO users VALUES(3,'Char''lie');
COMMIT;
```
Closes#1034
In the INSERT statement generated by dump function, if the type affinity
of the value is TEXT, replace each single quotation mark with two single
quotation marks, and wrap it with single quotation marks.
