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dbms: improvements [#METR-19266]

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This commit is contained in:
Alexey Arno 2016-07-14 15:58:30 +03:00
parent ec30520c89
commit d0d1ad3be1
5 changed files with 62 additions and 40 deletions
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33
dbms/include/DB/DataTypes/NullSymbol.h
View File

@ -1,10 +1,6 @@
#pragma once
#include <DB/Columns/IColumn.h>
#include <DB/IO/ReadBuffer.h>
#include <DB/IO/ReadHelpers.h>
#include <DB/IO/WriteBuffer.h>
#include <DB/IO/WriteHelpers.h>
namespace DB
{
@ -70,35 +66,6 @@ struct XML
static constexpr auto length = strlen_constexpr(name);
};
template <typename Null>
struct Deserializer
{
static bool execute(IColumn & column, ReadBuffer & istr, NullValuesByteMap * null_map)
{
if (null_map != nullptr)
{
if (!istr.eof())
{
if (*istr.position() == Null::prefix)
{
++istr.position();
if (Null::length > 1)
assertString(Null::suffix, istr);
null_map->push_back(1);
return true;
}
else
{
null_map->push_back(0);
return false;
}
}
}
return false;
}
};
}
}

4
dbms/src/DataTypes/DataTypeNull.cpp
View File

@ -1,6 +1,10 @@
#include <DB/DataTypes/DataTypeNull.h>
#include <DB/DataTypes/NullSymbol.h>
#include <DB/Columns/ColumnNull.h>
#include <DB/IO/ReadBuffer.h>
#include <DB/IO/ReadHelpers.h>
#include <DB/IO/WriteBuffer.h>
#include <DB/IO/WriteHelpers.h>
namespace DB
{

43
dbms/src/DataTypes/DataTypeNullable.cpp
View File

@ -1,7 +1,11 @@
#include <DB/DataTypes/DataTypeNullable.h>
#include <DB/DataTypes/NullSymbol.h>
#include <DB/Columns/ColumnNullable.h>
#include <DB/Common/typeid_cast.h>
#include <DB/DataTypes/NullSymbol.h>
#include <DB/IO/ReadBuffer.h>
#include <DB/IO/ReadHelpers.h>
#include <DB/IO/WriteBuffer.h>
#include <DB/IO/WriteHelpers.h>
namespace DB
{
@ -9,6 +13,35 @@ namespace DB
namespace
{
template <typename Null>
struct Deserializer
{
static bool execute(IColumn & column, ReadBuffer & istr, NullValuesByteMap * null_map)
{
if (null_map != nullptr)
{
if (!istr.eof())
{
if (*istr.position() == Null::prefix)
{
++istr.position();
if (Null::length > 1)
assertString(Null::suffix, istr);
null_map->push_back(1);
return true;
}
else
{
null_map->push_back(0);
return false;
}
}
}
return false;
}
};
inline bool isNullValue(const NullValuesByteMap * null_map, size_t row_num)
{
return (null_map != nullptr) && ((*null_map)[row_num] == 1);
@ -116,7 +149,7 @@ void DataTypeNullable::deserializeTextEscaped(IColumn & column, ReadBuffer & ist
ColumnUInt8 & content = static_cast<ColumnUInt8 &>(*(col->getNullValuesByteMap().get()));
auto & null_map = content.getData();
if (NullSymbol::Deserializer<NullSymbol::Escaped>::execute(column, istr, &null_map))
if (Deserializer<NullSymbol::Escaped>::execute(column, istr, &null_map))
{
ColumnPtr & nested_col = col->getNestedColumn();
nested_col.get()->insertDefault();
@ -149,7 +182,7 @@ void DataTypeNullable::deserializeTextQuoted(IColumn & column, ReadBuffer & istr
ColumnUInt8 & content = static_cast<ColumnUInt8 &>(*(col->getNullValuesByteMap().get()));
auto & null_map = content.getData();
if (NullSymbol::Deserializer<NullSymbol::Quoted>::execute(column, istr, &null_map))
if (Deserializer<NullSymbol::Quoted>::execute(column, istr, &null_map))
{
ColumnPtr & nested_col = col->getNestedColumn();
nested_col.get()->insertDefault();
@ -182,7 +215,7 @@ void DataTypeNullable::deserializeTextCSV(IColumn & column, ReadBuffer & istr, c
ColumnUInt8 & content = static_cast<ColumnUInt8 &>(*(col->getNullValuesByteMap().get()));
auto & null_map = content.getData();
if (NullSymbol::Deserializer<NullSymbol::Quoted>::execute(column, istr, &null_map))
if (Deserializer<NullSymbol::Quoted>::execute(column, istr, &null_map))
{
ColumnPtr & nested_col = col->getNestedColumn();
nested_col.get()->insertDefault();
@ -230,7 +263,7 @@ void DataTypeNullable::deserializeTextJSON(IColumn & column, ReadBuffer & istr)
ColumnUInt8 & content = static_cast<ColumnUInt8 &>(*(col->getNullValuesByteMap().get()));
auto & null_map = content.getData();
if (NullSymbol::Deserializer<NullSymbol::JSON>::execute(column, istr, &null_map))
if (Deserializer<NullSymbol::JSON>::execute(column, istr, &null_map))
{
ColumnPtr & nested_col = col->getNestedColumn();
nested_col.get()->insertDefault();

11
dbms/src/Storages/StorageLog.cpp
View File

@ -258,8 +258,17 @@ Block LogBlockInputStream::readImpl()
bool read_offsets = true;
const IDataType * observed_type;
if (column.type.get()->isNullable())
{
const DataTypeNullable & nullable_type = static_cast<const DataTypeNullable &>(*(column.type.get()));
observed_type = nullable_type.getNestedType().get();
}
else
observed_type = column.type.get();
/// Для вложенных структур запоминаем указатели на столбцы со смещениями
if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&*column.type))
if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(observed_type))
{
String name = DataTypeNested::extractNestedTableName(column.name);

11
dbms/src/Storages/StorageTinyLog.cpp
View File

@ -196,8 +196,17 @@ Block TinyLogBlockInputStream::readImpl()
bool read_offsets = true;
const IDataType * observed_type;
if (column.type.get()->isNullable())
{
const DataTypeNullable & nullable_type = static_cast<const DataTypeNullable &>(*(column.type.get()));
observed_type = nullable_type.getNestedType().get();
}
else
observed_type = column.type.get();
/// Для вложенных структур запоминаем указатели на столбцы со смещениями
if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(&*column.type))
if (const DataTypeArray * type_arr = typeid_cast<const DataTypeArray *>(observed_type))
{
String name = DataTypeNested::extractNestedTableName(column.name);