2012-08-26 11:14:52 +00:00
|
|
|
|
#include <DB/Core/Defines.h>
|
|
|
|
|
|
2011-08-19 19:18:15 +00:00
|
|
|
|
#include <DB/IO/ReadHelpers.h>
|
|
|
|
|
#include <DB/IO/VarInt.h>
|
2015-08-16 07:01:41 +00:00
|
|
|
|
#include <DB/IO/CompressedReadBufferFromFile.h>
|
2011-08-19 19:18:15 +00:00
|
|
|
|
|
2012-08-26 11:14:52 +00:00
|
|
|
|
#include <DB/Columns/ColumnArray.h>
|
|
|
|
|
#include <DB/DataTypes/DataTypeArray.h>
|
2015-05-28 03:49:28 +00:00
|
|
|
|
#include <DB/DataTypes/DataTypeFactory.h>
|
2012-08-26 11:14:52 +00:00
|
|
|
|
|
2011-08-19 19:18:15 +00:00
|
|
|
|
#include <DB/DataStreams/NativeBlockInputStream.h>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
namespace DB
|
|
|
|
|
{
|
|
|
|
|
|
2012-08-26 11:14:52 +00:00
|
|
|
|
|
2015-08-16 07:01:41 +00:00
|
|
|
|
NativeBlockInputStream::NativeBlockInputStream(
|
|
|
|
|
ReadBuffer & istr_, UInt64 server_revision_,
|
|
|
|
|
const IndexForNativeFormat * index_)
|
|
|
|
|
: istr(istr_), server_revision(server_revision_), index(index_)
|
|
|
|
|
{
|
|
|
|
|
if (index)
|
|
|
|
|
{
|
|
|
|
|
istr_concrete = typeid_cast<CompressedReadBufferFromFile *>(&istr);
|
|
|
|
|
if (!istr_concrete)
|
|
|
|
|
throw Exception("When need to use index for NativeBlockInputStream, istr must be CompressedReadBufferFromFile.", ErrorCodes::LOGICAL_ERROR);
|
|
|
|
|
|
|
|
|
|
index_block_it = index->blocks.begin();
|
|
|
|
|
index_column_it = index_block_it->columns.begin();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2015-04-16 10:48:35 +00:00
|
|
|
|
void NativeBlockInputStream::readData(const IDataType & type, IColumn & column, ReadBuffer & istr, size_t rows)
|
2012-08-26 11:14:52 +00:00
|
|
|
|
{
|
|
|
|
|
/** Для массивов требуется сначала десериализовать смещения, а потом значения.
|
|
|
|
|
*/
|
2014-06-26 00:58:14 +00:00
|
|
|
|
if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&type))
|
2012-08-26 11:14:52 +00:00
|
|
|
|
{
|
2014-06-26 00:58:14 +00:00
|
|
|
|
IColumn & offsets_column = *typeid_cast<ColumnArray &>(column).getOffsetsColumn();
|
2015-02-15 12:38:21 +00:00
|
|
|
|
type_arr->getOffsetsType()->deserializeBinary(offsets_column, istr, rows, 0);
|
2012-08-26 11:14:52 +00:00
|
|
|
|
|
|
|
|
|
if (offsets_column.size() != rows)
|
|
|
|
|
throw Exception("Cannot read all data in NativeBlockInputStream.", ErrorCodes::CANNOT_READ_ALL_DATA);
|
|
|
|
|
|
|
|
|
|
if (rows)
|
|
|
|
|
readData(
|
|
|
|
|
*type_arr->getNestedType(),
|
2014-06-26 00:58:14 +00:00
|
|
|
|
typeid_cast<ColumnArray &>(column).getData(),
|
2012-08-26 11:14:52 +00:00
|
|
|
|
istr,
|
2014-06-26 00:58:14 +00:00
|
|
|
|
typeid_cast<const ColumnArray &>(column).getOffsets()[rows - 1]);
|
2012-08-26 11:14:52 +00:00
|
|
|
|
}
|
|
|
|
|
else
|
2015-02-15 12:38:21 +00:00
|
|
|
|
type.deserializeBinary(column, istr, rows, 0); /// TODO Использовать avg_value_size_hint.
|
2012-08-26 11:14:52 +00:00
|
|
|
|
|
|
|
|
|
if (column.size() != rows)
|
|
|
|
|
throw Exception("Cannot read all data in NativeBlockInputStream.", ErrorCodes::CANNOT_READ_ALL_DATA);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2011-09-04 21:23:19 +00:00
|
|
|
|
Block NativeBlockInputStream::readImpl()
|
2011-08-19 19:18:15 +00:00
|
|
|
|
{
|
|
|
|
|
Block res;
|
|
|
|
|
|
2015-05-28 03:49:28 +00:00
|
|
|
|
const DataTypeFactory & data_type_factory = DataTypeFactory::instance();
|
|
|
|
|
|
2015-08-16 07:01:41 +00:00
|
|
|
|
if (index && index_block_it == index->blocks.end())
|
|
|
|
|
return res;
|
|
|
|
|
|
2011-08-19 19:18:15 +00:00
|
|
|
|
if (istr.eof())
|
2015-08-16 07:01:41 +00:00
|
|
|
|
{
|
|
|
|
|
if (index)
|
|
|
|
|
throw Exception("Input doesn't contain all data for index.", ErrorCodes::CANNOT_READ_ALL_DATA);
|
|
|
|
|
|
2011-08-19 19:18:15 +00:00
|
|
|
|
return res;
|
2015-08-16 07:01:41 +00:00
|
|
|
|
}
|
2014-06-26 00:58:14 +00:00
|
|
|
|
|
2015-01-03 03:18:49 +00:00
|
|
|
|
/// Дополнительная информация о блоке.
|
|
|
|
|
if (server_revision >= DBMS_MIN_REVISION_WITH_BLOCK_INFO)
|
|
|
|
|
res.info.read(istr);
|
|
|
|
|
|
2011-08-19 19:18:15 +00:00
|
|
|
|
/// Размеры
|
|
|
|
|
size_t columns = 0;
|
|
|
|
|
size_t rows = 0;
|
2015-08-16 07:01:41 +00:00
|
|
|
|
|
|
|
|
|
if (!index)
|
|
|
|
|
{
|
|
|
|
|
readVarUInt(columns, istr);
|
|
|
|
|
readVarUInt(rows, istr);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
columns = index_block_it->num_columns;
|
|
|
|
|
rows = index_block_it->num_rows;
|
|
|
|
|
}
|
2011-08-19 19:18:15 +00:00
|
|
|
|
|
|
|
|
|
for (size_t i = 0; i < columns; ++i)
|
|
|
|
|
{
|
2015-08-16 07:01:41 +00:00
|
|
|
|
if (index) /// Если текущая позиция какая требуется, то реального seek-а не происходит.
|
|
|
|
|
istr_concrete->seek(index_column_it->location.offset_in_compressed_file, index_column_it->location.offset_in_decompressed_block);
|
|
|
|
|
|
2015-07-17 01:27:35 +00:00
|
|
|
|
ColumnWithTypeAndName column;
|
2011-08-19 19:18:15 +00:00
|
|
|
|
|
|
|
|
|
/// Имя
|
2015-08-16 07:01:41 +00:00
|
|
|
|
readBinary(column.name, istr);
|
2011-08-19 19:18:15 +00:00
|
|
|
|
|
|
|
|
|
/// Тип
|
|
|
|
|
String type_name;
|
2015-08-16 07:01:41 +00:00
|
|
|
|
readBinary(type_name, istr);
|
2011-08-19 19:18:15 +00:00
|
|
|
|
column.type = data_type_factory.get(type_name);
|
|
|
|
|
|
2015-08-16 07:01:41 +00:00
|
|
|
|
if (index)
|
|
|
|
|
{
|
|
|
|
|
/// Индекс позволяет сделать проверки.
|
|
|
|
|
if (index_column_it->name != column.name)
|
|
|
|
|
throw Exception("Index points to column with wrong name: corrupted index or data", ErrorCodes::INCORRECT_INDEX);
|
|
|
|
|
if (index_column_it->type != type_name)
|
|
|
|
|
throw Exception("Index points to column with wrong type: corrupted index or data", ErrorCodes::INCORRECT_INDEX);
|
|
|
|
|
}
|
|
|
|
|
|
2011-08-19 19:18:15 +00:00
|
|
|
|
/// Данные
|
|
|
|
|
column.column = column.type->createColumn();
|
2012-08-26 11:14:52 +00:00
|
|
|
|
readData(*column.type, *column.column, istr, rows);
|
2011-08-19 19:18:15 +00:00
|
|
|
|
|
|
|
|
|
res.insert(column);
|
2015-08-16 07:01:41 +00:00
|
|
|
|
|
|
|
|
|
if (index)
|
|
|
|
|
++index_column_it;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (index)
|
|
|
|
|
{
|
|
|
|
|
if (index_column_it != index_block_it->columns.end())
|
|
|
|
|
throw Exception("Inconsistent index: not all columns were read", ErrorCodes::INCORRECT_INDEX);
|
|
|
|
|
|
|
|
|
|
++index_block_it;
|
2011-08-19 19:18:15 +00:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return res;
|
|
|
|
|
}
|
|
|
|
|
|
2015-08-16 07:01:41 +00:00
|
|
|
|
|
|
|
|
|
void IndexForNativeFormat::read(ReadBuffer & istr, const NameSet & required_columns)
|
|
|
|
|
{
|
|
|
|
|
while (!istr.eof())
|
|
|
|
|
{
|
|
|
|
|
blocks.emplace_back();
|
|
|
|
|
IndexOfBlockForNativeFormat & block = blocks.back();
|
|
|
|
|
|
|
|
|
|
readVarUInt(block.num_columns, istr);
|
|
|
|
|
readVarUInt(block.num_rows, istr);
|
|
|
|
|
|
|
|
|
|
if (block.num_columns < required_columns.size())
|
|
|
|
|
throw Exception("Index contain less than required columns", ErrorCodes::INCORRECT_INDEX);
|
|
|
|
|
|
|
|
|
|
for (size_t i = 0; i < block.num_columns; ++i)
|
|
|
|
|
{
|
|
|
|
|
IndexOfOneColumnForNativeFormat column_index;
|
|
|
|
|
|
|
|
|
|
readBinary(column_index.name, istr);
|
|
|
|
|
readBinary(column_index.type, istr);
|
|
|
|
|
readBinary(column_index.location.offset_in_compressed_file, istr);
|
|
|
|
|
readBinary(column_index.location.offset_in_decompressed_block, istr);
|
|
|
|
|
|
|
|
|
|
if (required_columns.count(column_index.name))
|
|
|
|
|
block.columns.push_back(std::move(column_index));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (block.columns.size() < required_columns.size())
|
|
|
|
|
throw Exception("Index contain less than required columns", ErrorCodes::INCORRECT_INDEX);
|
|
|
|
|
if (block.columns.size() > required_columns.size())
|
|
|
|
|
throw Exception("Index contain duplicate columns", ErrorCodes::INCORRECT_INDEX);
|
|
|
|
|
|
|
|
|
|
block.num_columns = block.columns.size();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
2011-08-19 19:18:15 +00:00
|
|
|
|
}
|