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#ifndef __clang_analyzer__ // It's too hard to analyze.
#include "GatherUtils.h"
#include "Selectors.h"
#include "Algorithms.h"
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
namespace GatherUtils
{
namespace
{
struct ArrayConcat : public ArraySourceSelector<ArrayConcat>
{
using Sources = std::vector<std::unique_ptr<IArraySource>>;
template <typename Source>
static void selectSource(bool /*is_const*/, bool is_nullable, Source & source, const Sources & sources, 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());
concat<NullableSource, NullableSink>(sources, std::move(sink));
}
else
{
result = ColumnArray::create(source.createValuesColumn());
Sink sink(result->getData(), result->getOffsets(), source.getColumnSize());
concat<SourceType, Sink>(sources, std::move(sink));
}
}
};
}
ColumnArray::MutablePtr concat(const std::vector<std::unique_ptr<IArraySource>> & sources)
{
if (sources.empty())
throw Exception(ErrorCodes::LOGICAL_ERROR, "Concat function should get at least 1 ArraySource");
ColumnArray::MutablePtr res;
ArrayConcat::select(*sources.front(), sources, res);
return res;
}
}
}
#endif
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