public NametableTry(string path)
{
PType tp_person = new PTypeRecord(
new NamedType("code", new PType(PTypeEnumeration.integer)),
new NamedType("name", new PType(PTypeEnumeration.sstring)));
tab_person = new TableView(path + "nametable", tp_person);
// Индексы: Персона
Func <object, int> person_code_keyproducer = v => (int)((object[])((object[])v)[1])[0];
ind_arr_person = new IndexKeyImmutable <int>(path + "code_ind")
{
Table = tab_person,
KeyProducer = person_code_keyproducer,
Scale = null
};
ind_arr_person.Scale = new ScaleCell(path + "code_ind")
{
IndexCell = ind_arr_person.IndexCell
};
index_person = new IndexDynamic <int, IndexKeyImmutable <int> >(true)
{
Table = tab_person,
IndexArray = ind_arr_person,
KeyProducer = person_code_keyproducer
};
Func <object, string> name_keyproducer = v => (string)((object[])((object[])v)[1])[1];
ind_arr_person_name = new IndexViewImmutable <string>(path + "name_ind")
{
Table = tab_person,
KeyProducer = name_keyproducer,
Scale = null
};
index_person_name = new IndexDynamic <string, IndexViewImmutable <string> >(false)
{
Table = tab_person,
IndexArray = ind_arr_person_name,
KeyProducer = name_keyproducer
};
tab_person.RegisterIndex(index_person);
tab_person.RegisterIndex(index_person_name);
}
public Stan3TabsInt(string path)
{
PType tp_person = new PTypeRecord(
new NamedType("code", new PType(PTypeEnumeration.integer)),
new NamedType("name", new PType(PTypeEnumeration.sstring)),
new NamedType("age", new PType(PTypeEnumeration.integer)));
PType tp_photo_doc = new PTypeRecord(
new NamedType("code", new PType(PTypeEnumeration.integer)),
new NamedType("name", new PType(PTypeEnumeration.sstring)));
PType tp_reflection = new PTypeRecord(
new NamedType("code", new PType(PTypeEnumeration.integer)), // Может не быть
new NamedType("reflected", new PType(PTypeEnumeration.integer)), // ссылки на коды
new NamedType("in_doc", new PType(PTypeEnumeration.integer)));
tab_person = new TableView(path + "person", tp_person);
tab_photo_doc = new TableView(path + "photo_doc", tp_photo_doc);
tab_reflection = new TableView(path + "reflection", tp_reflection);
// Индексы: Персона
Func <object, int> person_code_keyproducer = v => (int)((object[])((object[])v)[1])[0];
ind_arr_person = new IndexKeyImmutable <int>(path + "person_ind")
{
Table = tab_person,
KeyProducer = person_code_keyproducer,
Scale = null
};
ind_arr_person.Scale = new ScaleCell(path + "person_ind")
{
IndexCell = ind_arr_person.IndexCell
};
ind_arr_person.Scale.Build();
index_person = new IndexDynamic <int, IndexKeyImmutable <int> >(true)
{
Table = tab_person,
IndexArray = ind_arr_person,
KeyProducer = person_code_keyproducer
};
// Индексы - документ
Func <object, int> photo_doc_code_keyproducer = v => (int)((object[])((object[])v)[1])[0];
ind_arr_photo_doc = new IndexKeyImmutable <int>(path + "photo_doc_ind")
{
Table = tab_photo_doc,
KeyProducer = photo_doc_code_keyproducer,
Scale = null
};
ind_arr_photo_doc.Scale = new ScaleCell(path + "photo_doc_ind")
{
IndexCell = ind_arr_photo_doc.IndexCell
};
ind_arr_photo_doc.Scale.Build();
index_photo_doc = new IndexDynamic <int, IndexKeyImmutable <int> >(true)
{
Table = tab_photo_doc,
IndexArray = ind_arr_photo_doc,
KeyProducer = photo_doc_code_keyproducer
};
// Индекс - reflection-reflected
Func <object, int> reflected_keyproducer = v => (int)((object[])((object[])v)[1])[1];
ind_arr_reflected = new IndexKeyImmutable <int>(path + "reflected_ind")
{
Table = tab_reflection,
KeyProducer = reflected_keyproducer,
Scale = null
};
ind_arr_reflected.Scale = new ScaleCell(path + "reflected_ind")
{
IndexCell = ind_arr_reflected.IndexCell
};
ind_arr_reflected.Scale.Build();
index_reflected = new IndexDynamic <int, IndexKeyImmutable <int> >(false)
{
Table = tab_reflection,
IndexArray = ind_arr_reflected,
KeyProducer = reflected_keyproducer
};
// Индекс - reflection-in_doc
Func <object, int> in_doc_keyproducer = v => (int)((object[])((object[])v)[1])[2];
ind_arr_in_doc = new IndexKeyImmutable <int>(path + "in_doc_ind")
{
Table = tab_reflection,
KeyProducer = in_doc_keyproducer,
Scale = null
};
ind_arr_in_doc.Scale = new ScaleCell(path + "in_doc_ind")
{
IndexCell = ind_arr_in_doc.IndexCell
};
ind_arr_in_doc.Scale.Build();
index_in_doc = new IndexDynamic <int, IndexKeyImmutable <int> >(false)
{
Table = tab_reflection,
IndexArray = ind_arr_in_doc,
KeyProducer = in_doc_keyproducer
};
Func <object, string> name_keyproducer = v => (string)((object[])((object[])v)[1])[1];
ind_arr_person_name = new IndexViewImmutable <string>(path + "personname_ind")
{
Table = tab_person,
KeyProducer = name_keyproducer,
Scale = null
};
ind_arr_person_name.Scale = new ScaleCell(path + "personname_ind")
{
IndexCell = ind_arr_in_doc.IndexCell
};
ind_arr_person_name.Scale.Build();
index_person_name = new IndexDynamic <string, IndexViewImmutable <string> >(false)
{
Table = tab_person,
IndexArray = ind_arr_person_name,
KeyProducer = name_keyproducer
};
tab_person.RegisterIndex(index_person);
tab_person.RegisterIndex(index_person_name);
tab_photo_doc.RegisterIndex(index_photo_doc);
tab_reflection.RegisterIndex(index_reflected);
tab_reflection.RegisterIndex(index_in_doc);
}
public void Indexes(int[] cnoms)
{
if (tp_element.Vid != PTypeEnumeration.record)
{
throw new Exception("Err in TableReletional Indexes: Type of element is not record");
}
allindexes = new IIndexCommon[cnoms.Length];
PTypeRecord tp_r = (PTypeRecord)tp_element;
this.cnoms = cnoms;
int i = 0;
foreach (int nom in cnoms)
{
if (nom < 0 || nom > tp_r.Fields.Length)
{
throw new Exception("Err in TableRelational Indexes: element number is out of range");
}
PType tp = tp_r.Fields[nom].Type;
if (tp.Vid == PTypeEnumeration.integer)
{
Func <object, int> keyproducer = v => (int)((object[])((object[])v)[1])[nom];
IndexKeyImmutable <int> ind_arr = new IndexKeyImmutable <int>(getstream())
{
Table = table,
KeyProducer = keyproducer,
Scale = null
};
ind_arr.Scale = new ScaleCell(getstream())
{
IndexCell = ind_arr.IndexCell
};
IndexDynamic <int, IndexKeyImmutable <int> > index = new IndexDynamic <int, IndexKeyImmutable <int> >(true, ind_arr);
allindexes[i] = index;
table.RegisterIndex(index);
}
else if (tp.Vid == PTypeEnumeration.sstring)
{
IndexHalfkeyImmutable <string> index_arr = new IndexHalfkeyImmutable <string>(getstream())
{
Table = table,
KeyProducer = v => (string)((object[])((object[])v)[1])[nom],
HalfProducer = v => Hashfunctions.HashRot13(v)
};
index_arr.Scale = new ScaleCell(getstream())
{
IndexCell = index_arr.IndexCell
};
IndexDynamic <string, IndexHalfkeyImmutable <string> > index =
new IndexDynamic <string, IndexHalfkeyImmutable <string> >(false, index_arr);
allindexes[i] = index;
table.RegisterIndex(index);
}
else
{
throw new Exception($"Err: vid {tp.Vid} is not implemented in TableRelational Indexes");
}
i++;
}
//BuildIndexes();
}
//static string path = "Databases/";
public static void Main4()
{
Random rnd = new Random();
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
Console.WriteLine("Start demo of table and Universal Index with PagedStorage");
// Тип основной таблицы
PType tp_person = new PTypeRecord(
new NamedType("id", new PType(PTypeEnumeration.integer)),
new NamedType("name", new PType(PTypeEnumeration.sstring)),
new NamedType("age", new PType(PTypeEnumeration.real)));
// ======================== Теперь нам понадобится страничное хранилище =========================
// файл - носитель хранилища
string filepath = dbpath + "storage.bin";
bool fob_exists = File.Exists(filepath); // этот признак используется при разных процессах инициализации
// Открываем иили создаем файл-носитель хранилища
FileStream fs = new FileStream(filepath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
// Создаем собственно блочное (страничное) хранилище
FileOfBlocks fob = new FileOfBlocks(fs);
// Далее идет корявый способ создания трех потоков (Stream), нужных для базы данных
Stream first_stream = fob.GetFirstAsStream();
if (!fob_exists)
{
PagedStream.InitPagedStreamHead(first_stream, 8L, 0, PagedStream.HEAD_SIZE);
fob.Flush();
}
PagedStream main_stream = new PagedStream(fob, fob.GetFirstAsStream(), 8L);
long sz = PagedStream.HEAD_SIZE;
// Если main_stream нулевой длины, надо инициировать конфигурацию стримов
if (main_stream.Length == 0)
{
// инициируем 3 головы для потоков
PagedStream.InitPagedStreamHead(main_stream, 0L, 0L, -1L);
PagedStream.InitPagedStreamHead(main_stream, sz, 0L, -1L);
PagedStream.InitPagedStreamHead(main_stream, 2 * sz, 0L, -1L);
main_stream.Flush(); fob.Flush();
}
// создадим 3 потока
PagedStream stream_person = new PagedStream(fob, main_stream, 0L);
PagedStream stream_index = new PagedStream(fob, main_stream, 1 * sz);
PagedStream stream_scale = new PagedStream(fob, main_stream, 2 * sz);
// =========================== OK ==========================
// База данных такая же, как и в программе 3, только вместо файлов используются потоки
TableView tab_person = new TableView(stream_person, tp_person);
Func <object, int> person_code_keyproducer = v => (int)((object[])((object[])v)[1])[0];
IndexKeyImmutable <int> ind_arr_person = new IndexKeyImmutable <int>(stream_index)
{
Table = tab_person,
KeyProducer = person_code_keyproducer,
Scale = null
};
ind_arr_person.Scale = new ScaleCell(stream_scale)
{
IndexCell = ind_arr_person.IndexCell
};
IndexDynamic <int, IndexKeyImmutable <int> > index_person = new IndexDynamic <int, IndexKeyImmutable <int> >(true)
{
Table = tab_person,
IndexArray = ind_arr_person,
KeyProducer = person_code_keyproducer
};
tab_person.RegisterIndex(index_person);
fob.DeactivateCache();
int nelements = 1000000;
bool toload = true; // Загружать или нет новую базу данных
if (toload)
{
sw.Restart();
// Очистим ячейки последовательности и индекса
tab_person.Clear();
IEnumerable <object> flow = Enumerable.Range(0, nelements)
.Select(i =>
{
int id = nelements - i;
string name = "=" + id.ToString() + "=";
double age = rnd.NextDouble() * 100.0;
return(new object[] { id, name, age });
});
tab_person.Fill(flow);
// Теперь надо отсортировать индексный массив по ключу
tab_person.BuildIndexes();
sw.Stop();
Console.WriteLine("Load ok. duration for {0} elements: {1} ms", nelements, sw.ElapsedMilliseconds);
}
sw.Restart();
// Загрузка кеша ускоряет обработку
fob.LoadCache();
sw.Stop();
Console.WriteLine("Cache load duration={0}", sw.ElapsedMilliseconds);
// Проверим работу
int search_key = nelements * 2 / 3;
var ob = index_person.GetAllByKey(search_key)
.Select(ent => ((object[])ent.Get())[1])
.FirstOrDefault();
if (ob == null)
{
throw new Exception("Didn't find person " + search_key);
}
Console.WriteLine("Person {0} has name {1}", search_key, ((object[])ob)[1]);
// Засечем скорость выборок
int nte = 10000;
sw.Restart();
for (int i = 0; i < nte; i++)
{
search_key = rnd.Next(nelements) + 1;
ob = index_person.GetAllByKey(search_key)
.Select(ent => ((object[])ent.Get())[1])
.FirstOrDefault();
if (ob == null)
{
throw new Exception("Didn't find person " + search_key);
}
string nam = (string)((object[])ob)[1];
}
sw.Stop();
Console.WriteLine("Duration for {2} search in {0} elements: {1} ms", nelements, sw.ElapsedMilliseconds, nte);
}
public Stan3TabsInt(string path)
{
PType tp_person = new PTypeRecord(
new NamedType("code", new PType(PTypeEnumeration.integer)),
new NamedType("name", new PType(PTypeEnumeration.sstring)),
new NamedType("age", new PType(PTypeEnumeration.integer)));
PType tp_photo_doc = new PTypeRecord(
new NamedType("code", new PType(PTypeEnumeration.integer)),
new NamedType("name", new PType(PTypeEnumeration.sstring)));
PType tp_reflection = new PTypeRecord(
new NamedType("code", new PType(PTypeEnumeration.integer)), // Может не быть
new NamedType("reflected", new PType(PTypeEnumeration.integer)), // ссылки на коды
new NamedType("in_doc", new PType(PTypeEnumeration.integer)));
tab_person = new TableView(path + "person", tp_person);
tab_photo_doc = new TableView(path + "photo_doc", tp_photo_doc);
tab_reflection = new TableView(path + "reflection", tp_reflection);
// Индексы: Персона
Func<object, int> person_code_keyproducer = v => (int)((object[])((object[])v)[1])[0];
ind_arr_person = new IndexKeyImmutable<int>(path + "person_ind")
{
Table = tab_person,
KeyProducer = person_code_keyproducer,
Scale = null
};
//ind_arr_person.Scale = new ScaleCell(path + "person_ind") { IndexCell = ind_arr_person.IndexCell };
//ind_arr_person.Scale.Build();
index_person = new IndexDynamic<int, IndexKeyImmutable<int>>(true)
{
Table = tab_person,
IndexArray = ind_arr_person,
KeyProducer = person_code_keyproducer
};
// Индексы - документ
Func<object, int> photo_doc_code_keyproducer = v => (int)((object[])((object[])v)[1])[0];
ind_arr_photo_doc = new IndexKeyImmutable<int>(path + "photo_doc_ind")
{
Table = tab_photo_doc,
KeyProducer = photo_doc_code_keyproducer,
Scale = null
};
//ind_arr_photo_doc.Scale = new ScaleCell(path + "photo_doc_ind") { IndexCell = ind_arr_photo_doc.IndexCell };
//ind_arr_photo_doc.Scale.Build();
index_photo_doc = new IndexDynamic<int, IndexKeyImmutable<int>>(true)
{
Table = tab_photo_doc,
IndexArray = ind_arr_photo_doc,
KeyProducer = photo_doc_code_keyproducer
};
// Индекс - reflection-reflected
Func<object, int> reflected_keyproducer = v => (int)((object[])((object[])v)[1])[1];
ind_arr_reflected = new IndexKeyImmutable<int>(path + "reflected_ind")
{
Table = tab_reflection,
KeyProducer = reflected_keyproducer,
Scale = null
};
//ind_arr_reflected.Scale = new ScaleCell(path + "reflected_ind") { IndexCell = ind_arr_reflected.IndexCell };
//ind_arr_reflected.Scale.Build();
index_reflected = new IndexDynamic<int, IndexKeyImmutable<int>>(false)
{
Table = tab_reflection,
IndexArray = ind_arr_reflected,
KeyProducer = reflected_keyproducer
};
// Индекс - reflection-in_doc
Func<object, int> in_doc_keyproducer = v => (int)((object[])((object[])v)[1])[2];
ind_arr_in_doc = new IndexKeyImmutable<int>(path + "in_doc_ind")
{
Table = tab_reflection,
KeyProducer = in_doc_keyproducer,
Scale = null
};
//ind_arr_in_doc.Scale = new ScaleCell(path + "in_doc_ind") { IndexCell = ind_arr_in_doc.IndexCell };
//ind_arr_in_doc.Scale.Build();
index_in_doc = new IndexDynamic<int, IndexKeyImmutable<int>>(false)
{
Table = tab_reflection,
IndexArray = ind_arr_in_doc,
KeyProducer = in_doc_keyproducer
};
Func<object, string> name_keyproducer = v => (string)((object[])((object[])v)[1])[1];
ind_arr_person_name = new IndexViewImmutable<string>(path + "personname_ind")
{
Table = tab_person,
KeyProducer = name_keyproducer,
Scale = null
};
//ind_arr_person_name.Scale = new ScaleCell(path + "personname_ind") {IndexCell = ind_arr_in_doc.IndexCell};
//ind_arr_person_name.Scale.Build();
index_person_name = new IndexDynamic<string, IndexViewImmutable<string>>(false)
{
Table = tab_person,
IndexArray = ind_arr_person_name,
KeyProducer = name_keyproducer
};
tab_person.RegisterIndex(index_person);
tab_person.RegisterIndex(index_person_name);
tab_photo_doc.RegisterIndex(index_photo_doc);
tab_reflection.RegisterIndex(index_reflected);
tab_reflection.RegisterIndex(index_in_doc);
}
public static void Main3(string[] args)
{
Random rnd = new Random();
Console.WriteLine("Start Task04_Sequenses_Main2");
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
PType tp_person = new PTypeRecord(
new NamedType("id", new PType(PTypeEnumeration.integer)),
new NamedType("name", new PType(PTypeEnumeration.sstring)),
new NamedType("rage", new PType(PTypeEnumeration.real)));
TableView tab_person = new TableView(path + "tab_person.pac", tp_person);
Func <object, int> person_code_keyproducer = v => (int)((object[])((object[])v)[1])[0];
IndexKeyImmutable <int> ind_arr_person = new IndexKeyImmutable <int>(path + "person_ind")
{
Table = tab_person,
KeyProducer = person_code_keyproducer,
Scale = null
};
//ind_arr_person.Scale = new ScaleCell(path + "person_ind") { IndexCell = ind_arr_person.IndexCell };
IndexDynamic <int, IndexKeyImmutable <int> > index_person = new IndexDynamic <int, IndexKeyImmutable <int> >(true, ind_arr_person);
tab_person.RegisterIndex(index_person);
int nelements = 1_000_000;
bool toload = true; // Загружать или нет новую базу данных
if (toload)
{
sw.Restart();
// Очистим ячейки последовательности и индекса
tab_person.Clear();
IEnumerable <object> flow = Enumerable.Range(0, nelements)
.Select(i =>
{
int id = nelements - i;
string name = "=" + id.ToString() + "=";
double age = rnd.NextDouble() * 100.0;
return(new object[] { id, name, age });
});
tab_person.Fill(flow);
// Теперь надо отсортировать индексный массив по ключу
tab_person.BuildIndexes();
sw.Stop();
Console.WriteLine("Load ok. duration for {0} elements: {1} ms", nelements, sw.ElapsedMilliseconds);
}
else
{
tab_person.Warmup();
}
// Проверим работу
int search_key = nelements * 2 / 3;
var ob = index_person.GetAllByKey(search_key)
.Select(ent => ((object[])ent.Get())[1])
.FirstOrDefault();
if (ob == null)
{
throw new Exception("Didn't find person " + search_key);
}
Console.WriteLine("Person {0} has name {1}", search_key, ((object[])ob)[1]);
// Засечем скорость выборок
int nprobe = 1000;
sw.Restart();
for (int i = 0; i < nprobe; i++)
{
search_key = rnd.Next(nelements) + 1;
ob = index_person.GetAllByKey(search_key)
.Select(ent => ((object[])ent.Get())[1])
.FirstOrDefault();
if (ob == null)
{
throw new Exception("Didn't find person " + search_key);
}
string nam = (string)((object[])ob)[1];
}
sw.Stop();
Console.WriteLine($"Duration for {nprobe} search in {nelements} elements: {sw.ElapsedMilliseconds} ms");
}
public static void Main5()
{
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
string path = "../../../Databases/";
int NumberOfRecords = 1000000;
Random rnd = new Random();
Console.WriteLine("Start Universal Index. Main5()");
PType tp_table_element = new PTypeRecord(
new NamedType("name", new PType(PTypeEnumeration.sstring)),
new NamedType("age", new PType(PTypeEnumeration.integer)));
TableView table = new TableView(path + "table", tp_table_element);
sw.Restart();
bool tobuild = true;
if (tobuild)
{
table.Fill(Enumerable.Range(0, NumberOfRecords).Select(i =>
(object)(new object[] { i.ToString(), i == NumberOfRecords / 2 ? -1 : i })));
sw.Stop();
Console.WriteLine("Load Table of {0} elements ok. Duration {1}", NumberOfRecords, sw.ElapsedMilliseconds);
}
else table.Warmup();
sw.Restart();
// Делаем индекс
var aa = new IndexKeyImmutable<int>(path + "dyna_index_int")
{
Table = table,
KeyProducer = va => (int)((object[])(((object[])va)[1]))[1]
};
bool tobuild_a_index = true;
if (tobuild_a_index) aa.Build();
else aa.Warmup();
IndexDynamic<int, IndexKeyImmutable<int>> a_index = new IndexDynamic<int, IndexKeyImmutable<int>>(true)
{
Table = table,
KeyProducer = va => (int)((object[])(((object[])va)[1]))[1],
IndexArray = aa
};
Console.WriteLine("a_index Build ok. Duration {0}", sw.ElapsedMilliseconds);
sw.Restart();
int cnt = 0;
for (int i = 0; i < 1000; i++)
{
int c = a_index.GetAllByKey(rnd.Next(NumberOfRecords * 3 / 2 - 1)).Count();
if (c > 1) Console.WriteLine("Unexpected Error: {0}", c);
cnt += c;
}
sw.Stop();
Console.WriteLine("1000 GetAllByKey ok. Duration={0} cnt={1}", sw.ElapsedMilliseconds, cnt);
}
