ClickHouse/dbms/src/Core/BlockInfo.cpp
2019-01-04 17:14:48 +03:00

78 lines
1.8 KiB
C++

#include <Core/Types.h>
#include <Common/Exception.h>
#include <IO/ReadBuffer.h>
#include <IO/WriteBuffer.h>
#include <IO/VarInt.h>
#include <IO/ReadHelpers.h>
#include <IO/WriteHelpers.h>
#include <Core/BlockInfo.h>
namespace DB
{
namespace ErrorCodes
{
extern const int UNKNOWN_BLOCK_INFO_FIELD;
}
/// Write values in binary form. NOTE: You could use protobuf, but it would be overkill for this case.
void BlockInfo::write(WriteBuffer & out) const
{
/// Set of pairs `FIELD_NUM`, value in binary form. Then 0.
#define WRITE_FIELD(TYPE, NAME, DEFAULT, FIELD_NUM) \
writeVarUInt(FIELD_NUM, out); \
writeBinary(NAME, out);
APPLY_FOR_BLOCK_INFO_FIELDS(WRITE_FIELD)
#undef WRITE_FIELD
writeVarUInt(0, out);
}
/// Read values in binary form.
void BlockInfo::read(ReadBuffer & in)
{
UInt64 field_num = 0;
while (true)
{
readVarUInt(field_num, in);
if (field_num == 0)
break;
switch (field_num)
{
#define READ_FIELD(TYPE, NAME, DEFAULT, FIELD_NUM) \
case FIELD_NUM: \
readBinary(NAME, in); \
break;
APPLY_FOR_BLOCK_INFO_FIELDS(READ_FIELD)
#undef READ_FIELD
default:
throw Exception("Unknown BlockInfo field number: " + toString(field_num), ErrorCodes::UNKNOWN_BLOCK_INFO_FIELD);
}
}
}
void BlockMissingValues::setBit(size_t column_idx, size_t row_idx)
{
RowsBitMask & mask = rows_mask_by_column_id[column_idx];
mask.resize(row_idx + 1);
mask[row_idx] = true;
}
const BlockMissingValues::RowsBitMask & BlockMissingValues::getDefaultsBitmask(size_t column_idx) const
{
static RowsBitMask none;
auto it = rows_mask_by_column_id.find(column_idx);
if (it != rows_mask_by_column_id.end())
return it->second;
return none;
}
}