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9f18fdbfd2d6b78183ca7fd4ea5e8f1a43e4e2ee
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74 Commits

Author SHA1 Message Date
rjhallsted
9f18fdbfd2 Remove unecessary clone when executing LIKE function 2024-09-10 11:25:52 -07:00
sonhmai
9cc965186f core: support modifiers in date function 2024-09-03 14:28:07 +07:00
Rajiv Harlalka
0b5b0a426d remove redundant comment 
Signed-off-by: Rajiv Harlalka <rajivharlalka009@gmail.com>
 2024-08-30 20:28:37 +05:30
Rajiv Harlalka
1de974253b add support for custom date time value as first parameter 
Signed-off-by: Rajiv Harlalka <rajivharlalka009@gmail.com>
 2024-08-30 20:27:59 +05:30
Rajiv Harlalka
6684fb46e4 FEAT: Implement the unixepoch function 
Signed-off-by: Rajiv Harlalka <rajivharlalka009@gmail.com>
 2024-08-30 20:27:58 +05:30
sonhmai
c32bb91dd5 core: support modifiers in time function 2024-08-24 18:31:34 +07:00
Kim Seon Woo
8f617dd394 Apply fmt 2024-08-20 18:44:06 +02:00
Kim Seon Woo
8bb2a48cb6 Add support for nullif scalar function 2024-08-20 18:36:06 +02:00
Pekka Enberg
edf0f754f6 Merge 'More structured query planner' from Jussi Saurio 
Reader's guide to this PR:

The aim is to have a more structured and maintainable approach to generating bytecode from the query AST so that different parts of the query processing pipeline have clearer responsibilities, so that developing new functionality is easier. E.g.:

- If you want to implement join reordering -> you do it in `Optimizer`
- If you want to implement `GROUP BY` -> you change `QueryPlanNode::Aggregate` to include it, parse it in `Planner` and handle the code generation for it in `Emitter`

The pipeline is:

`SQL text -> Parser -> Planner -> Optimizer -> Emitter`

and this pipeline generates:

`SQL text -> AST -> Logical Plan -> Optimized Logical Plan -> SQLite Bytecode`

---

Module structure:

`plan.rs`: defines the `Operator` enum. An `Operator` is a tree of other `Operators`, e.g. an `Operator::Join` has `left` and `right` children, etc.

`planner.rs`: Parses an `ast::Select` into a `Plan` which is mainly a wrapper for a root `Operator`

`optimizer.rs`: Makes a new `Plan` from an input `Plan` - does predicate pushdown, constant elimination and turns `Scan` nodes into `SeekRowId` nodes where applicable

`emitter.rs`: Generates bytecode instructions from an input `Plan`.

---

Adds feature `EXPLAIN QUERY PLAN <stmt>` which shows the logical query plan instead of the bytecode plan

---

Other changes:

- Almost everything from `select.rs` removed; things like `translate_aggregation()` moved to `expr.rs`
- `where_clause.rs` removed, some things from it like `translate_condition_expr()` moved to `expr.rs`
- i.e.: there is nothing _new_ in `expr.rs`, stuff just moved there

---

Concerns:

- Perf impact: there's a lot more indirection than before (`Operator`s are very "traditional" trees where they refer to other operators via Boxes etc)

Closes #281
 2024-08-18 16:36:51 +03:00
jussisaurio
e8c894e532 More flexible Emitter via stateful operators 2024-08-17 12:55:16 +03:00
JeanArhancet
b6c720c90a feat: add quote function 2024-08-17 09:28:14 +02:00
jussisaurio
2e32ca0bdb More structured query planner 2024-08-16 19:42:03 +03:00
Kim Seon Woo
48d3c05fb0 Rebase 2024-08-16 21:40:30 +09:00
Pekka Enberg
c9c0d2808c Merge 'Add support for ifnull scalar function' from Kim Seon Woo 
Add support for `ifnull` scalar function

### EXPLAIN SELECT ifnull(null, 20);
![image](https://github.com/user-attachments/assets/e367638f-9d70-4dfc-989d-7290b842c2ec)

### Related issue
https://github.com/penberg/limbo/issues/144

Closes #290
 2024-08-16 14:37:08 +03:00
Pekka Enberg
ba3acedbc8 Merge 'Add support for substr scalar function' from Kim Seon Woo 
Add support for `substr` scalar function. We can reuse the `substring` logic which is already implemted.

## Related issue
https://github.com/penberg/limbo/issues/144

Closes #289
 2024-08-16 14:36:55 +03:00
김선우
8fbcd10e0e Add support for ifnull scalar function 2024-08-16 09:25:04 +09:00
김선우
27d9af2bf4 Add support for substr scalar function 2024-08-16 08:26:42 +09:00
김선우
fe526e118e Nit 2024-08-16 06:43:55 +09:00
김선우
77c3d130f3 Add char function support 2024-08-16 06:26:06 +09:00
Pekka Enberg
39e77bac9f Merge 'Implement scala function substring(...) ' from Kim Seon Woo 
Implement scala function `substring(x, y, z)` and `substring(x, y)`

### EXPLAIN SELECT substring('limbo', 3);
![image](https://github.com/user-attachments/assets/0138d802-c40e-4990-8657-05a0d54ee00f)

### EXPLAIN SELECT substring('limbo', 1, 2);
![image](https://github.com/user-attachments/assets/1babeb1b-f5ca-4b8f-ae19-c4f06b51d4b6)

### Related issue
https://github.com/penberg/limbo/issues/144

Closes #286
 2024-08-15 19:45:22 +03:00
김선우
ac440495bd Nit 2024-08-15 18:59:46 +09:00
김선우
28bd0275c0 Run cargo fmt, clippy 2024-08-15 18:56:02 +09:00
김선우
dc48c2e71d Add substring scala function with 2 arg 2024-08-15 18:47:32 +09:00
김선우
3fa3c5c002 Add substr scala function 2024-08-15 18:27:18 +09:00
gandeevanr
23a7d389b1 added unit tests for NewRowid 2024-08-08 19:04:10 -07:00
gandeevanr
a9cb8157b5 initial pass at implementing NewRowId 2024-08-07 09:04:09 -07:00
sonhmai
c104e50a66 core: add datetime modifiers helpers. 
Building the helpers for integrating with supporting datetime Functions modifiers later.
 2024-08-07 13:43:51 +07:00
Pekka Enberg
5b7d112e74 Merge 'implementation of json function json(X)' from Jean Arhancet 
Add the `json` function `json(X)` (related to the issue https://github.com/penberg/limbo/issues/127)

Closes #230
 2024-08-06 08:05:33 +03:00
JeanArhancet
4050a3ebe2 refactor: impl json5 direclty 2024-08-04 12:47:08 +02:00
JeanArhancet
8dbced6a39 refactor: delete Insn Json 2024-08-04 10:56:51 +02:00
JeanArhancet
552090cb29 feat: add json support 2024-08-04 10:54:27 +02:00
sonhmai
0e7bd95e4e core: fix clippy 2024-08-03 20:14:26 +07:00
Pekka Enberg
0affdada2a core: Move datetime.rs to vdbe/ 
The file contains SQL functions invoked by the VDBE so let's move the
file there.
 2024-08-02 17:34:10 +03:00
Pekka Enberg
9c479734be core: Rename to exec_time() 
Follow the same naming convention as other SQL functions.
 2024-08-02 17:34:10 +03:00
Pekka Enberg
465dfa3cb5 core: Rename to exec_date() 
Follow the same naming convention as other SQL functions.
 2024-08-02 17:34:10 +03:00
jussisaurio
20c085614f Add ability to annotate instructions with comments 2024-08-01 20:34:45 +03:00
jussisaurio
f344e07868 extract method 2024-08-01 17:54:29 +03:00
jussisaurio
551b11303f Broaden the type of expr that qualifies as seekrowid candidate 2024-08-01 17:23:59 +03:00
jussisaurio
97dfae437c SeekRowid VM instruction 2024-08-01 17:23:59 +03:00
jussisaurio
d965998cdf btree_seek_rowid() implementation 2024-08-01 17:23:59 +03:00
Pekka Enberg
f8a43361db core: Move pager.rs to storage module 2024-08-01 11:52:50 +03:00
Pekka Enberg
7abc48303f core: Move btree.rs to storage module 2024-08-01 11:52:50 +03:00
Pekka Enberg
73bdf1671f Initial pass on WAL reader 
These are mostly just stubs for now, but at least we have some code in
place as reminder what we need.
 2024-08-01 11:31:17 +03:00
Pekka Enberg
e88e57f9ba Merge 'Random clippy cleanups' from Pekka Enberg 
Closes #253
 2024-08-01 10:22:25 +03:00
Pekka Enberg
82ff5b9c9b core: Remove useless use of format!() 2024-08-01 09:16:02 +03:00
sonhmai
789ae4becf feat: add time() scalar function partial support without modifier #158 2024-08-01 13:06:07 +07:00
Pere Diaz Bou
20dc068a9d core: don't traverse twice 2024-07-31 17:27:02 +02:00
Pere Diaz Bou
3b9f5aa511 core: implement exists 2024-07-31 17:27:02 +02:00
Pere Diaz Bou
84bf0ea96a core: remove a bunch of warnings 
Signed-off-by: Pere Diaz Bou <pere-altea@hotmail.com>
 2024-07-31 17:27:02 +02:00
Pere Diaz Bou
463292c2fe core: fix rebase errors 2024-07-31 17:27:02 +02:00