Method executeImpl

src/Functions/coverage.cpp:127–153

        return std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt64>());
    }
    ColumnPtr executeImpl(const ColumnsWithTypeAndName &, const DataTypePtr &, size_t input_rows_count) const override
    {
        auto column = ColumnUInt64::create();
        auto & data = column->getData();
#if defined(__ELF__) && !defined(OS_FREEBSD)
        const auto name_refs = getCurrentCoveredNameRefs();
        size_t map_size = DB::getCoverageMapSize();
        size_t matches = DB::countCoverageMatches(name_refs);
        auto [non_empty, zero_line, first_info] = DB::diagCoverageRegions(name_refs);
        data.push_back(static_cast<UInt64>(name_refs.size()));
        data.push_back(static_cast<UInt64>(map_size));
        data.push_back(static_cast<UInt64>(matches));
        data.push_back(static_cast<UInt64>(non_empty));   // regions with non-empty file
        data.push_back(static_cast<UInt64>(zero_line));   // regions with line_start==0
        data.push_back(static_cast<UInt64>(first_info));  // file_len<<32|line_start of first match
#else
        data.push_back(0);
        data.push_back(0);
        data.push_back(0);
        data.push_back(0);
        data.push_back(0);
        data.push_back(0);
#endif
        auto offsets = ColumnArray::ColumnOffsets::create(1, data.size());
        auto array = ColumnArray::create(std::move(column), std::move(offsets));
        return ColumnConst::create(std::move(array), input_rows_count);
    }
};

REGISTER_FUNCTION(CoverageLines)