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56843baff9
Database::get_schema currently either returns a RefPtr to an existing schema, a nullptr if the schema doesn't exist, or an Error if some internal error occured. Change this to return a NonnullRefPtr to an exisiting schema, or a SQL::Result with any error, including if the schema was not found. Callers can then handle that specific error code if they want. Returning a NonnullRefPtr will enable some further cleanup. This had some fallout of needing to change some other methods' return types from AK::ErrorOr to SQL::Result so that TRY may continue to be used.
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
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* Copyright (c) 2021, Mahmoud Mandour <ma.mandourr@gmail.com>
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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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#include <LibSQL/Meta.h>
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#include <LibSQL/Result.h>
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#include <LibSQL/Serializer.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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~Database() override;
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ResultOr<void> open();
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bool is_open() const { return m_open; }
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ErrorOr<void> commit();
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ResultOr<void> add_schema(SchemaDef const&);
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static Key get_schema_key(String const&);
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ResultOr<NonnullRefPtr<SchemaDef>> get_schema(String const&);
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ErrorOr<void> add_table(TableDef& table);
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static Key get_table_key(String const&, String const&);
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ResultOr<RefPtr<TableDef>> get_table(String const&, String const&);
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ErrorOr<Vector<Row>> select_all(TableDef const&);
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ErrorOr<Vector<Row>> match(TableDef const&, Key const&);
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ErrorOr<void> insert(Row&);
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ErrorOr<void> update(Row&);
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private:
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explicit Database(String);
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bool m_open { false };
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NonnullRefPtr<Heap> m_heap;
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Serializer m_serializer;
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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, NonnullRefPtr<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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