row store
1 2 3 4 +----+ +----+ +----+ +-----+ | | | | | | | | +----+ +----+ +----| +-----+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +----+ +----+ +----+ +-----+
vid value index