Method executeImpl

src/Functions/array/arrayDistinct.cpp:89–132

ColumnPtr FunctionArrayDistinct::executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t /*input_rows_count*/) const
{
    ColumnPtr array_ptr = arguments[0].column;
    const ColumnArray & array = checkAndGetColumn<ColumnArray>(*array_ptr);

    const auto & return_type = result_type;

    auto res_ptr = return_type->createColumn();
    ColumnArray & res = assert_cast<ColumnArray &>(*res_ptr);

    const IColumn & src_data = array.getData();
    const ColumnArray::Offsets & offsets = array.getOffsets();

    IColumn & res_data = res.getData();
    ColumnArray::Offsets & res_offsets = res.getOffsets();

    const ColumnNullable * nullable_col = checkAndGetColumn<ColumnNullable>(&src_data);

    const IColumn * inner_col = nullptr;

    if (nullable_col)
    {
        inner_col = &nullable_col->getNestedColumn();
    }
    else
    {
        inner_col = &src_data;
    }

    if (!(executeNumber<UInt8>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<UInt16>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<UInt32>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<UInt64>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<Int8>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<Int16>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<Int32>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<Int64>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<Float32>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeNumber<Float64>(*inner_col, offsets, res_data, res_offsets, nullable_col)
        || executeString(*inner_col, offsets, res_data, res_offsets, nullable_col)))
        executeHashed(*inner_col, offsets, res_data, res_offsets, nullable_col);

    return res_ptr;
}

template <typename T>
bool FunctionArrayDistinct::executeNumber(