Method updateParentPointers

src/java/simpledb/index/BTreeFile.java:474–486

Update the parent pointer of every child of the given page so that it correctly points to the parent @param tid - the transaction id @param dirtypages - the list of dirty pages which should be updated with all new dirty pages @param page - the parent page @see #updateParentPointer(TransactionId, Ma

(TransactionId tid, Map<PageId, Page> dirtypages, BTreeInternalPage page)

	 * @throws TransactionAbortedException
	 */
	private void updateParentPointers(TransactionId tid, Map<PageId, Page> dirtypages, BTreeInternalPage page)
			throws DbException, TransactionAbortedException{
		Iterator<BTreeEntry> it = page.iterator();
		BTreePageId pid = page.getId();
		BTreeEntry e = null;
		while(it.hasNext()) {
			e = it.next();
			updateParentPointer(tid, dirtypages, pid, e.getLeftChild());
		}
		if(e != null) {
			updateParentPointer(tid, dirtypages, pid, e.getRightChild());
		}
	}
	
	/**
	 * Method to encapsulate the process of locking/fetching a page.  First the method checks the local