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87bd69559f
This patch implements the beginnings of a database API allowing for the creation of tables, inserting rows in those tables, and retrieving those rows.
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
/*
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* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/RefPtr.h>
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#include <AK/String.h>
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#include <LibCore/Object.h>
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#include <LibSQL/Forward.h>
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#include <LibSQL/Heap.h>
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namespace SQL {
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/**
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* A Database object logically connects a Heap with the SQL data we want
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* to store in it. It has BTree pointers for B-Trees holding the definitions
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* of tables, columns, indexes, and other SQL objects.
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*/
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class Database : public Core::Object {
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C_OBJECT(Database);
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public:
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explicit Database(String);
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~Database() override = default;
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void commit() { m_heap->flush(); }
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void add_schema(SchemaDef const&);
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static Key get_schema_key(String const&);
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RefPtr<SchemaDef> get_schema(String const&);
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void add_table(TableDef& table);
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static Key get_table_key(String const&, String const&);
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RefPtr<TableDef> get_table(String const&, String const&);
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Vector<Row> select_all(TableDef const&);
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Vector<Row> match(TableDef const&, Key const&);
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bool insert(Row&);
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bool update(Row&);
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private:
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RefPtr<Heap> m_heap;
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RefPtr<BTree> m_schemas;
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RefPtr<BTree> m_tables;
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RefPtr<BTree> m_table_columns;
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HashMap<u32, RefPtr<SchemaDef>> m_schema_cache;
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HashMap<u32, RefPtr<TableDef>> m_table_cache;
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};
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}
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