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LibSQL: Free heap storage when deleting rows

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This commit is contained in:
Jelle Raaijmakers 2023-05-24 15:57:34 +02:00 committed by Tim Flynn
parent c58c87d7ef
commit 69e09fed39
Notes: sideshowbarker 2024-07-17 08:34:29 +09:00 
Author: https://github.com/gmta
Commit: https://github.com/SerenityOS/serenity/commit/69e09fed39
Pull-request: https://github.com/SerenityOS/serenity/pull/19022
Reviewed-by: https://github.com/trflynn89 ✅
3 changed files with 33 additions and 1 deletions
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29
Tests/LibSQL/TestSqlDatabase.cpp
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@ -206,3 +206,32 @@ TEST_CASE(insert_100_into_table)
{
insert_and_verify(100);
}
TEST_CASE(reuse_row_storage)
{
ScopeGuard guard([]() { unlink("/tmp/test.db"); });
auto db = SQL::Database::construct("/tmp/test.db");
MUST(db->open());
(void)setup_table(db);
auto table = MUST(db->get_table("TestSchema", "TestTable"));
// Insert row
SQL::Row row(*table);
row["TextColumn"] = "text value";
row["IntColumn"] = 12345;
TRY_OR_FAIL(db->insert(row));
TRY_OR_FAIL(db->commit());
auto original_size_in_bytes = MUST(db->file_size_in_bytes());
// Remove row
TRY_OR_FAIL(db->remove(row));
TRY_OR_FAIL(db->commit());
auto size_in_bytes_after_removal = MUST(db->file_size_in_bytes());
EXPECT(size_in_bytes_after_removal <= original_size_in_bytes);
// Insert same row again
TRY_OR_FAIL(db->insert(row));
TRY_OR_FAIL(db->commit());
auto size_in_bytes_after_reinsertion = MUST(db->file_size_in_bytes());
EXPECT(size_in_bytes_after_reinsertion <= original_size_in_bytes);
}

3
Userland/Libraries/LibSQL/Database.cpp
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@ -6,7 +6,6 @@
*/
#include <AK/DeprecatedString.h>
#include <AK/NonnullRefPtr.h>
#include <LibSQL/BTree.h>
#include <LibSQL/Database.h>
#include <LibSQL/Heap.h>
@ -217,6 +216,8 @@ ErrorOr<void> Database::remove(Row& row)
auto& table = row.table();
VERIFY(m_table_cache.get(table.key().hash()).has_value());
TRY(m_heap->free_storage(row.block_index()));
if (table.block_index() == row.block_index()) {
auto table_key = table.key();
table_key.set_block_index(row.next_block_index());

2
Userland/Libraries/LibSQL/Database.h
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@ -8,6 +8,7 @@
#pragma once
#include <AK/DeprecatedString.h>
#include <AK/NonnullRefPtr.h>
#include <AK/RefPtr.h>
#include <LibCore/Object.h>
#include <LibSQL/Forward.h>
@ -32,6 +33,7 @@ public:
ResultOr<void> open();
bool is_open() const { return m_open; }
ErrorOr<void> commit();
ErrorOr<size_t> file_size_in_bytes() const { return m_heap->file_size_in_bytes(); }
ResultOr<void> add_schema(SchemaDef const&);
static Key get_schema_key(DeprecatedString const&);