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#ifndef __clang_analyzer__ // It's too hard to analyze.
#include "GatherUtils.h"
#include "Selectors.h"
#include "Algorithms.h"
namespace DB::GatherUtils
{
namespace
{
struct Selector : public ArraySourceSelector<Selector>
{
template <typename Source>
static void selectSource(bool is_const, bool is_nullable, Source && source,
const IColumn & length_column, ColumnArray::MutablePtr & result)
{
using SourceType = typename std::decay<Source>::type;
using Sink = typename SourceType::SinkType;
if (is_nullable)
{
using NullableSource = NullableArraySource<SourceType>;
using NullableSink = typename NullableSource::SinkType;
auto & nullable_source = static_cast<NullableSource &>(source);
result = ColumnArray::create(nullable_source.createValuesColumn());
NullableSink sink(result->getData(), result->getOffsets(), source.getColumnSize());
if (is_const)
sliceFromLeftDynamicLength(static_cast<ConstSource<NullableSource> &>(source), sink, length_column);
else
sliceFromLeftDynamicLength(static_cast<NullableSource &>(source), sink, length_column);
}
else
{
result = ColumnArray::create(source.createValuesColumn());
Sink sink(result->getData(), result->getOffsets(), source.getColumnSize());
if (is_const)
sliceFromLeftDynamicLength(static_cast<ConstSource<SourceType> &>(source), sink, length_column);
else
sliceFromLeftDynamicLength(source, sink, length_column);
}
}
};
}
ColumnArray::MutablePtr sliceFromLeftDynamicLength(IArraySource & src, const IColumn & length_column)
{
ColumnArray::MutablePtr res;
Selector::select(src, length_column, res);
return res;
}
}
#endif
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