As discussed with @kitaisreal 
{
    select = select_;
}
const ColumnsDescription & StorageInMemoryMetadata::getColumns() const
{
    return columns;
}
const IndicesDescription & StorageInMemoryMetadata::getSecondaryIndices() const
{
    return secondary_indices;
}
bool StorageInMemoryMetadata::hasSecondaryIndices() const
{
    return !secondary_indices.empty();
}
const ConstraintsDescription & StorageInMemoryMetadata::getConstraints() const
{
    return constraints;
}
const ProjectionsDescription & StorageInMemoryMetadata::getProjections() const
{
    return projections;
}
bool StorageInMemoryMetadata::hasProjections() const