mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 02:41:59 +00:00
105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
#include <Common/typeid_cast.h>
|
|
#include <Common/assert_cast.h>
|
|
#include <Columns/FilterDescription.h>
|
|
#include <Columns/ColumnsNumber.h>
|
|
#include <Columns/ColumnNullable.h>
|
|
#include <Columns/ColumnConst.h>
|
|
#include <Core/ColumnWithTypeAndName.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int ILLEGAL_TYPE_OF_COLUMN_FOR_FILTER;
|
|
}
|
|
|
|
|
|
ConstantFilterDescription::ConstantFilterDescription(const IColumn & column)
|
|
{
|
|
if (column.onlyNull())
|
|
{
|
|
always_false = true;
|
|
return;
|
|
}
|
|
|
|
if (isColumnConst(column))
|
|
{
|
|
const ColumnConst & column_const = assert_cast<const ColumnConst &>(column);
|
|
ColumnPtr column_nested = column_const.getDataColumnPtr()->convertToFullColumnIfLowCardinality();
|
|
|
|
if (!typeid_cast<const ColumnUInt8 *>(column_nested.get()))
|
|
{
|
|
const ColumnNullable * column_nested_nullable = checkAndGetColumn<ColumnNullable>(*column_nested);
|
|
if (!column_nested_nullable || !typeid_cast<const ColumnUInt8 *>(&column_nested_nullable->getNestedColumn()))
|
|
{
|
|
throw Exception("Illegal type " + column_nested->getName() + " of column for constant filter. Must be UInt8 or Nullable(UInt8).",
|
|
ErrorCodes::ILLEGAL_TYPE_OF_COLUMN_FOR_FILTER);
|
|
}
|
|
}
|
|
|
|
if (column_const.getValue<UInt64>())
|
|
always_true = true;
|
|
else
|
|
always_false = true;
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
FilterDescription::FilterDescription(const IColumn & column_)
|
|
{
|
|
if (column_.lowCardinality())
|
|
data_holder = column_.convertToFullColumnIfLowCardinality();
|
|
|
|
const auto & column = data_holder ? *data_holder : column_;
|
|
|
|
if (const ColumnUInt8 * concrete_column = typeid_cast<const ColumnUInt8 *>(&column))
|
|
{
|
|
data = &concrete_column->getData();
|
|
return;
|
|
}
|
|
|
|
if (auto * nullable_column = checkAndGetColumn<ColumnNullable>(column))
|
|
{
|
|
ColumnPtr nested_column = nullable_column->getNestedColumnPtr();
|
|
MutableColumnPtr mutable_holder = (*std::move(nested_column)).mutate();
|
|
|
|
ColumnUInt8 * concrete_column = typeid_cast<ColumnUInt8 *>(mutable_holder.get());
|
|
if (!concrete_column)
|
|
throw Exception("Illegal type " + column.getName() + " of column for filter. Must be UInt8 or Nullable(UInt8).",
|
|
ErrorCodes::ILLEGAL_TYPE_OF_COLUMN_FOR_FILTER);
|
|
|
|
const NullMap & null_map = nullable_column->getNullMapData();
|
|
IColumn::Filter & res = concrete_column->getData();
|
|
|
|
size_t size = res.size();
|
|
for (size_t i = 0; i < size; ++i)
|
|
res[i] = res[i] && !null_map[i];
|
|
|
|
data = &res;
|
|
data_holder = std::move(mutable_holder);
|
|
return;
|
|
}
|
|
|
|
throw Exception("Illegal type " + column.getName() + " of column for filter. Must be UInt8 or Nullable(UInt8) or Const variants of them.",
|
|
ErrorCodes::ILLEGAL_TYPE_OF_COLUMN_FOR_FILTER);
|
|
}
|
|
|
|
|
|
void checkColumnCanBeUsedAsFilter(const ColumnWithTypeAndName & column_elem)
|
|
{
|
|
ConstantFilterDescription const_filter;
|
|
if (column_elem.column)
|
|
const_filter = ConstantFilterDescription(*column_elem.column);
|
|
|
|
if (!const_filter.always_false && !const_filter.always_true)
|
|
{
|
|
auto column = column_elem.column ? column_elem.column : column_elem.type->createColumn();
|
|
FilterDescription filter(*column);
|
|
}
|
|
}
|
|
|
|
}
|