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LibSQL: BTree index, Heap, and Meta objects for SQL Storage layer

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Unfortunately this patch is quite large.

The main functionality included are a BTree index implementation and
the Heap class which manages persistent storage.

Also included are a Key subclass of the Tuple class, which is a
specialization for index key tuples. This "dragged in" the Meta layer,
which has classes defining SQL objects like tables and indexes.
This commit is contained in:
Jan de Visser 2021-06-17 13:47:42 -04:00 • committed by Andreas Kling
parent 2a46529170
commit 224804b424
15 changed files with 2153 additions and 0 deletions
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30
Userland/Libraries/LibSQL/Key.h Normal file
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/*
* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/RefPtr.h>
#include <LibSQL/Forward.h>
#include <LibSQL/Tuple.h>
namespace SQL {
class Key : public Tuple {
public:
Key();
explicit Key(TupleDescriptor const&);
explicit Key(RefPtr<IndexDef>);
Key(TupleDescriptor const&, ByteBuffer&, size_t& offset);
Key(RefPtr<IndexDef>, ByteBuffer&, size_t& offset);
Key(Key const&) = default;
RefPtr<IndexDef> index() const { return m_index; }
[[nodiscard]] virtual size_t data_length() const override { return Tuple::data_length() + sizeof(u32); }
private:
RefPtr<IndexDef> m_index;
};
}