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93 Commits

Author SHA1 Message Date
Pekka Enberg
ad70a240d4 Merge pull request #147 from benclmnt/feat/where-and 2024-07-16 21:35:01 +03:00
Pekka Enberg
c42647c352 Merge pull request #171 from pereman2/translate-ref 
core: use references to ast instead of hard copies
 2024-07-16 20:36:04 +03:00
Pere Diaz Bou
01b96abbac core: use references to ast instead of hard copies 
Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-16 18:48:05 +02:00
Bennett Clement
3c4f2b07e6 Respect jump_if_true in like implementation 2024-07-16 18:17:37 +08:00
Bennett Clement
6f983702c3 Refactor if/ifnot implementation 2024-07-16 16:36:30 +08:00
Bennett Clement
05558527af Implement like in where clause 2024-07-16 15:55:33 +08:00
Bennett Clement
2f738e0c8b Implement like function 2024-07-16 15:23:52 +08:00
Bennett Clement
7858c350c5 Reintroduce overwritten optimization 2024-07-16 08:51:41 +08:00
Bennett Clement
4d077cf3e5 Implement std::cmp::PartialOrd for OwnedValue 2024-07-16 08:32:14 +08:00
Bennett Clement
fdf77cee2b Merge branch 'main' of github.com:benclmnt/limbo into feat/where-and 2024-07-16 08:10:24 +08:00
Pere Diaz Bou
0a7d0588d7 core: implement AND and OR + complex conditions. 
this also fixes NULL print to empty string

Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-15 19:42:12 +02:00
Bennett Clement
d1288cacef Implement where and 2024-07-15 23:19:46 +08:00
jussisaurio
d1eded0e90 Test with sqlite3 executable in CI as well 2024-07-15 17:27:04 +03:00
jussisaurio
ea793e4126 Inner join, table aliases, qualified column names 2024-07-14 20:09:40 +03:00
Pekka Enberg
99a6ca4f2f Merge pull request #142 from imor/clippy_fixes 2024-07-14 20:00:10 +03:00
Bennett Clement
72f1cdd5c4 Fix pr comments 2024-07-14 23:03:01 +08:00
Raminder Singh
e4a9c5ce6e fix clippy warnings 2024-07-14 16:50:54 +05:30
Bennett Clement
a85f47310c Move where clause literal out of loop 2024-07-14 14:00:25 +08:00
Bennett Clement
e9647bf425 Fix comments display 2024-07-14 13:50:21 +08:00
Pekka Enberg
0f0b88cbe7 Merge pull request #140 from benclmnt/feat/improve-explain-comments 2024-07-14 08:10:37 +03:00
Bennett Clement
d64733c0b9 Improve explain comments 
- Resolve cursor ID to table name and get column name from index
- Since we change the type of BranchOffset to i64, add assertions in
  Program.step() function
- opcode generation compatibility with sqlite: change register number to start from 1
- Improve Column,Rowid comment, Add DecrJumpZero comment, Fix Integer
  comment
- Fix typos in code comments
 2024-07-14 11:35:22 +08:00
jussisaurio
b288ac2b89 Optimize where clause bytecode 2024-07-14 01:30:09 +03:00
jussisaurio
851aea212d add coalesce(), refactor/rename add_label() 2024-07-13 23:03:56 +03:00
Pekka Enberg
9458522164 Merge pull request #134 from Ramkarthik/add-group-concat 2024-07-13 20:28:11 +03:00
Pere Diaz Bou
be387eb31c core: labels system and limit refactor 
Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-13 18:54:33 +02:00
Ramkarthik Krishnamurthy
59c6429555 Fix invalid column names in aggregate function 2024-07-13 11:47:59 +05:30
Ramkarthik Krishnamurthy
dddc0be88f Some refactoring 2024-07-13 02:46:37 +05:30
Ramkarthik Krishnamurthy
a303e6ad96 Implements string_agg and extends group_concat to work with column delimiters 2024-07-13 02:13:28 +05:30
Ramkarthik Krishnamurthy
9268560a51 Implements group concat aggregate function 2024-07-13 00:55:40 +05:30
jussisaurio
1b0aa568a4 Basic where clause support 2024-07-12 00:26:32 +03:00
Bennett Clement
8a9eb74f9b Implement total() aggregation function 
- Returns 0.0 when called on non integer / non float columns
- Always returns floating point number
- fix: default for sum() should be NULL when there is no non-NULL row
  per docs
 2024-07-11 23:40:55 +08:00
Pekka Enberg
d8af1aa73b Format source code with cargo fmt 2024-07-11 10:43:34 +03:00
Pekka Enberg
d8078d5e19 Simplify LIMIT 0 handling in translate_select() 
It's a special-case so let's make it special like SQLite does.
Simplifies the logic in `translate_select()` quite a bit.
 2024-07-11 09:42:24 +03:00
Pekka Enberg
46e34daccd Merge pull request #115 from pereman2/real-affinity 2024-07-11 08:11:18 +03:00
Pere Diaz Bou
538d624770 core: apply Real affinity on columns stored as int 
Values in sqlite3, as expected, can be stored in different formats to
optimize disk usage. In this case, a 79.0 float will be transformed to a
u8.

sqlite3 deals with this by adding a RealAffinity op after each column
that might need it. Therefore, in this pr we do exactly that :).

Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-10 21:21:49 +02:00
Pekka Enberg
5e47dfabaf Drop Select::from member field 
It's not used anywhere.
 2024-07-10 15:17:04 +03:00
Pekka Enberg
0316385150 Fold SelectContext to Select 
We can use Select to keep track of loops and stuff. Having a separate
SelectContext just means we need to pass around more objects to
functions.
 2024-07-10 15:09:30 +03:00
Pekka Enberg
f2b1971def Simplify AST type paths 
The `sqlite3_parser` prefix is redundant.
 2024-07-10 11:08:07 +03:00
Pere Diaz Bou
e557b7b9ee core: add comment for src_tables 
Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-09 18:48:26 +02:00
Pere Diaz Bou
61d0f877e3 core: create list of src tables 
Instead of having divided "from table" and "join tables", we merge them
in to a list of `src_tables`.

Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-09 18:46:35 +02:00
Pere Diaz Bou
46592e7b34 core: fix translate_expr args from new agg functions 
Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-09 18:10:18 +02:00
Pere Diaz Bou
110df3cff1 core: fix resolve table name from join 
Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-09 18:08:16 +02:00
Pere Diaz Bou
0b0885325c core: refactor generation of table row read 
In sqlite3 generating the loop to read multiple joined tables follows
the pattern:

```c
sqlite3WhereBegin();
sqlite3WhereEnd();
```

and this generates:
```
sqlite> explain select * from users, products;
addr  opcode         p1    p2    p3    p4             p5  comment
----  -------------  ----  ----  ----  -------------  --  -------------
0     Init           0     23    0                    0   Start at 23
1     OpenRead       0     2     0     10             0   root=2 iDb=0; users
2     OpenRead       1     3     0     3              0   root=3 iDb=0; products
3     Rewind         0     22    0                    0
4       Rewind         1     22    0                    0
5         Rowid          0     1     0                    0   r[1]=users.rowid
6         Column         0     1     2                    0   r[2]= cursor 0 column 1
7         Column         0     2     3                    0   r[3]= cursor 0 column 2
8         Column         0     3     4                    0   r[4]= cursor 0 column 3
9         Column         0     4     5                    0   r[5]= cursor 0 column 4
10        Column         0     5     6                    0   r[6]= cursor 0 column 5
11        Column         0     6     7                    0   r[7]= cursor 0 column 6
12        Column         0     7     8                    0   r[8]= cursor 0 column 7
13        Column         0     8     9                    0   r[9]= cursor 0 column 8
14        Column         0     9     10                   0   r[10]= cursor 0 column 9
15        Rowid          1     11    0                    0   r[11]=products.rowid
16        Column         1     1     12                   0   r[12]= cursor 1 column 1
17        Column         1     2     13                   0   r[13]= cursor 1 column 2
18        RealAffinity   13    0     0                    0
19        ResultRow      1     13    0                    0   output=r[1..13]
20      Next           1     5     0                    1
21    Next           0     4     0                    1
22    Halt           0     0     0                    0
23    Transaction    0     0     2     0              1   usesStmtJournal=0
24    Goto           0     1     0                    0
```

`sqlite3WhereBegin()` as the name represents, mainly does stuff with
`WHERE` expressions + loop generation. This is why I decided to change
the name to `translate_tables_begin` to try improve the naming.

In our case:
```rust
    translate_table_open_cursor(program, &mut context, select.from.as_ref().unwrap());
    translate_table_open_loop(program, &mut context, loop_index);
```

translates into:
```sql
> explain select * from users, products;
addr  opcode         p1    p2    p3    p4             p5  comment
----  -------------  ----  ----  ----  -------------  --  -------
0     Init           0     28    0       0   Start at 28
1     OpenReadAsync  0     2     0       0   root=2
2     OpenReadAwait  0     0     0       0
3     OpenReadAsync  1     3     0       0   root=3
4     OpenReadAwait  0     0     0       0
5     RewindAsync    0     0     0       0
6     RewindAwait    0     27    0       0
7     RewindAsync    1     0     0       0
8     RewindAwait    1     25    0       0
9     RowId          0     0     0       0
10    Column         0     1     1       0   r[1]= cursor 0 column 1
11    Column         0     2     2       0   r[2]= cursor 0 column 2
12    Column         0     3     3       0   r[3]= cursor 0 column 3
13    Column         0     4     4       0   r[4]= cursor 0 column 4
14    Column         0     5     5       0   r[5]= cursor 0 column 5
15    Column         0     6     6       0   r[6]= cursor 0 column 6
16    Column         0     7     7       0   r[7]= cursor 0 column 7
17    Column         0     8     8       0   r[8]= cursor 0 column 8
18    Column         0     9     9       0   r[9]= cursor 0 column 9
19    RowId          1     10    0       0
20    Column         1     1     11      0   r[11]= cursor 1 column 1
21    Column         1     2     12      0   r[12]= cursor 1 column 2
22    ResultRow      0     13    0       0   output=r[0..13]
23    NextAsync      1     0     0       0
24    NextAwait      1     8     0       0
25    NextAsync      0     0     0       0
26    NextAwait      0     6     0       0
27    Halt           0     0     0       0
28    Transaction    0     0     0       0
29    Goto           0     1     0       0
```

This works on as many joined tables but... it is ready to extend for
further join operations.

Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-09 18:08:16 +02:00
mazchew
fc0c3d539a add min aggregate function 
add changes for all.test
 2024-07-09 03:14:02 +08:00
mazchew
3f339d07d3 add max aggregate function 2024-07-09 02:45:34 +08:00
Kunal Singh
00c26286ce fix: lint warnings 2024-07-08 22:43:11 +05:30
Kunal Singh
fab8f1777a fix: unhandled empty args in aggregate function 2024-07-08 19:13:53 +05:30
Vivek Khatri
fe7c1b5b1d Merge branch 'main' into add-agg-fn-count 2024-07-08 13:58:14 +05:30
Vivek
94358dc665 Add aggregate fn: count 2024-07-08 13:55:06 +05:30
Pekka Enberg
30ec86a81e Add sorter utility functions and opcodes 
This adds basic in-memory sorting utility functions, similar to SQLite's
src/vdbesort.c. We need to improve this later with external sorting so
to support large data sets.

This also adds sorting functionality to the VDBE. Note that none of this
is wired to SQL translation yet so it's unused for now.
 2024-07-07 13:56:55 +03:00