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/*
* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullOwnPtr.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/NonnullRefPtr.h>
#include <AK/Result.h>
#include <AK/String.h>
#include <AK/Vector.h>
#include <LibCore/Object.h>
#include <LibSQL/AST/AST.h>
#include <LibSQL/Forward.h>
#include <LibSQL/Key.h>
#include <LibSQL/Type.h>
namespace SQL {
/**
* This file declares objects describing tables, indexes, and columns.
* It remains to be seen if this will survive in it's current form.
*/
class Relation : public Core::Object {
C_OBJECT_ABSTRACT(Relation);
public:
u32 hash() const { return key().hash(); }
u32 pointer() const { return m_pointer; }
void set_pointer(u32 pointer) { m_pointer = pointer; }
~Relation() override = default;
virtual Key key() const = 0;
Relation const* parent_relation() const { return dynamic_cast<Relation const*>(parent()); }
protected:
Relation(String name, u32 pointer, Relation* parent = nullptr)
: Core::Object(parent)
, m_pointer(pointer)
{
set_name(move(name));
}
explicit Relation(String name, Relation* parent = nullptr)
: Core::Object(parent)
, m_pointer(0)
{
set_name(move(name));
}
private:
u32 m_pointer { 0 };
};
class SchemaDef : public Relation {
C_OBJECT(SchemaDef);
public:
Key key() const override;
static NonnullRefPtr<IndexDef> index_def();
static Key make_key();
private:
explicit SchemaDef(String);
explicit SchemaDef(Key const&);
};
class ColumnDef : public Relation {
C_OBJECT(ColumnDef);
public:
Key key() const override;
SQLType type() const { return m_type; }
size_t column_number() const { return m_index; }
static NonnullRefPtr<IndexDef> index_def();
static Key make_key(TableDef const&);
protected:
ColumnDef(Relation*, size_t, String, SQLType);
private:
size_t m_index;
SQLType m_type { SQLType::Text };
};
class KeyPartDef : public ColumnDef {
C_OBJECT(KeyPartDef);
public:
KeyPartDef(IndexDef*, String, SQLType, AST::Order = AST::Order::Ascending);
AST::Order sort_order() const { return m_sort_order; }
private:
AST::Order m_sort_order { AST::Order::Ascending };
};
class IndexDef : public Relation {
C_OBJECT(IndexDef);
public:
~IndexDef() override = default;
NonnullRefPtrVector<KeyPartDef> key_definition() const { return m_key_definition; }
bool unique() const { return m_unique; }
[[nodiscard]] size_t size() const { return m_key_definition.size(); }
void append_column(String, SQLType, AST::Order = AST::Order::Ascending);
Key key() const override;
[[nodiscard]] TupleDescriptor to_tuple_descriptor() const;
static NonnullRefPtr<IndexDef> index_def();
static Key make_key(TableDef const& table_def);
private:
IndexDef(TableDef*, String, bool unique = true, u32 pointer = 0);
explicit IndexDef(String, bool unique = true, u32 pointer = 0);
NonnullRefPtrVector<KeyPartDef> m_key_definition;
bool m_unique { false };
friend TableDef;
};
class TableDef : public Relation {
C_OBJECT(TableDef);
public:
Key key() const override;
void append_column(String, SQLType);
void append_column(Key const&);
size_t num_columns() { return m_columns.size(); }
size_t num_indexes() { return m_indexes.size(); }
NonnullRefPtrVector<ColumnDef> columns() const { return m_columns; }
NonnullRefPtrVector<IndexDef> indexes() const { return m_indexes; }
[[nodiscard]] TupleDescriptor to_tuple_descriptor() const;
static NonnullRefPtr<IndexDef> index_def();
static Key make_key(SchemaDef const& schema_def);
static Key make_key(Key const& schema_key);
private:
explicit TableDef(SchemaDef*, String);
NonnullRefPtrVector<ColumnDef> m_columns;
NonnullRefPtrVector<IndexDef> m_indexes;
};
}
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