Pekka Enberg
40e5d58cea
Fix RewindAwait branching when cursor is empty
...
Even if we have a page, the cursor can still be empty if there are no
records.
2024-05-07 06:46:03 -03:00
Pekka Enberg
9a73ded4fa
Add a Cursor trait and use it
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We need an abstract cursor trait to implement a sorter, for example.
2024-03-28 15:01:52 +02:00
Pekka Enberg
ed9f3e6d1e
Single-threaded architecture
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Use Rc instead of Arc and replace the concurrent LRU with
single-threaded SIEVE.
Fixes #23
Fixes #29
2024-03-03 12:44:45 +02:00
Pekka Enberg
2c55cc797d
cargo clippy --fix
2024-01-28 10:21:38 +02:00
Pekka Enberg
225ee98769
cargo fmt
2024-01-28 09:58:04 +02:00
Pekka Enberg
505e28aaeb
Reduce memory allocations
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Fixes #26
2024-01-28 09:57:12 +02:00
Pekka Enberg
2d625f34c5
core: Optimize Cursor::next()
2024-01-27 09:32:26 +02:00
Pekka Enberg
ae2f403838
core: Fix step() return path when page is under I/O
2024-01-12 17:35:55 +02:00
Pekka Enberg
a39f5c68b4
core: Populate page contents lazily
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We need to be able to allocate a new page and insert it into a page
cache without contents for asynchronoous I/O. Let's do that by making
`contents` optional in Page. (We perhaps ought to rename it to
`inner`...)
2024-01-12 16:38:11 +02:00
Pekka Enberg
c28544530e
Prepare for asynchronous I/O with page flags
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We want to submit I/O asynchronously with io_uring, which means we can
have multiple concurrent lookups to the page that is under I/O.
Therefore, let's add three page flags: up-to-date, locked, and error, so
that the higher level layers can just look up a page, but wait if
there's I/O happening.
2023-11-18 12:19:44 +02:00
Pekka Enberg
20eba95383
Fix get_next_record() for all pages with right-most pointer
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The right-most pointer is always kept separate from the cells in an
interior page so let's traverse it in all cases.
2023-10-18 17:54:20 +03:00
Pekka Enberg
0e9cc6b21f
Fix full table scans
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A full table scan missed some of the last rows because we don't consider
sibling pages when there is no parent.
2023-10-17 16:53:24 +03:00
Pekka Enberg
a2202ed31e
Implement reading primary key columns
2023-09-10 13:19:17 +03:00
Pekka Enberg
4a5c71ab7a
I/O interface refactoring
2023-09-09 10:22:26 +03:00
Pekka Enberg
0a942f0fd0
Implement full table scan
2023-09-07 21:59:33 +03:00
Pekka Enberg
7c894f3b70
Parse BTree table interior cells
2023-09-04 21:59:00 +03:00
Pekka Enberg
9d2e7c89d7
Page cache
2023-09-02 19:32:49 +03:00
Pekka Enberg
ae709f04fe
Make some opcodes wait for completion
2023-09-02 13:26:44 +03:00
Pekka Enberg
3ec9c0be7c
Implement ResultRow opcode
2023-09-02 11:40:11 +03:00
Pekka Enberg
b25f8c4daf
Implement Cursor::next()
2023-08-31 21:45:04 +03:00
Pekka Enberg
05621e3286
Cursors
2023-08-30 20:26:15 +03:00
Pekka Enberg
b572d60dc5
B-Tree interface
2023-08-29 20:33:16 +03:00
