Method pageNode

bucket.go:933–955

pageNode returns the in-memory node, if it exists. Otherwise, returns the underlying page.

(id common.Pgid)

// pageNode returns the in-memory node, if it exists.
// Otherwise, returns the underlying page.
func (b *Bucket) pageNode(id common.Pgid) (*common.Page, *node) {
	// Inline buckets have a fake page embedded in their value so treat them
	// differently. We'll return the rootNode (if available) or the fake page.
	if b.RootPage() == 0 {
		if id != 0 {
			panic(fmt.Sprintf("inline bucket non-zero page access(2): %d != 0", id))
		}
		if b.rootNode != nil {
			return nil, b.rootNode
		}
		return b.page, nil
	}

	// Check the node cache for non-inline buckets.
	if b.nodes != nil {
		if n := b.nodes[id]; n != nil {
			return nil, n
		}
	}

	// Finally lookup the page from the transaction if no node is materialized.
	return b.tx.page(id), nil
}

// BucketStats records statistics about resources used by a bucket.
type BucketStats struct {