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LibSQL: Partially implement the DELETE command

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This implements enough to delete rows filtered by a WHERE clause.
This commit is contained in:
Timothy Flynn 2022-11-28 07:49:03 -05:00 • committed by Linus Groh
parent 6d3f68cc11
commit aba7f11a50
6 changed files with 190 additions and 0 deletions
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29
Userland/Libraries/LibSQL/Database.cpp
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@ -215,6 +215,35 @@ ErrorOr<void> Database::insert(Row& row)
return {};
}
ErrorOr<void> Database::remove(Row& row)
{
auto& table = row.table();
VERIFY(m_table_cache.get(table.key().hash()).has_value());
if (table.pointer() == row.pointer()) {
auto table_key = table.key();
table_key.set_pointer(row.next_pointer());
m_tables->update_key_pointer(table_key);
table.set_pointer(row.next_pointer());
return {};
}
for (auto pointer = table.pointer(); pointer;) {
auto current = m_serializer.deserialize_block<Row>(pointer, table, pointer);
if (current.next_pointer() == row.pointer()) {
current.set_next_pointer(row.next_pointer());
TRY(update(current));
break;
}
pointer = current.next_pointer();
}
return {};
}
ErrorOr<void> Database::update(Row& tuple)
{
VERIFY(m_table_cache.get(tuple.table().key().hash()).has_value());