public void remove(Session session) {
if (trace.isDebugEnabled()) {
trace.debug("{0} remove", this);
}
removeAllRows();
store.free(rootPageId);
store.removeMeta(this, session);
}
private void removeAllRows() {
try {
PageData root = getPage(rootPageId, 0);
root.freeRecursive();
root = PageDataLeaf.create(this, rootPageId, PageData.ROOT);
store.removeRecord(rootPageId);
store.update(root);
rowCount = 0;
lastKey = 0;
} finally {
store.incrementChangeCount();
}
}
/**
* Read an overflow page page.
*
* @param id the page id
* @return the page
*/
PageDataOverflow getPageOverflow(int id) {
Page p = store.getPage(id);
if (p instanceof PageDataOverflow) {
return (PageDataOverflow) p;
}
throw DbException.get(ErrorCode.FILE_CORRUPTED_1, p == null ? "null" : p.toString());
}
/**
* Read the given page.
*
* @param id the page id
* @param parent the parent, or -1 if unknown
* @return the page
*/
PageData getPage(int id, int parent) {
Page pd = store.getPage(id);
if (pd == null) {
PageDataLeaf empty = PageDataLeaf.create(this, id, parent);
// could have been created before, but never committed
store.logUndo(empty, null);
store.update(empty);
return empty;
} else if (!(pd instanceof PageData)) {
throw DbException.get(ErrorCode.FILE_CORRUPTED_1, "" + pd);
}
PageData p = (PageData) pd;
if (parent != -1) {
if (p.getParentPageId() != parent) {
throw DbException.throwInternalError(
p + " parent " + p.getParentPageId() + " expected " + parent);
}
}
return p;
}
public void writeRowCount() {
if (SysProperties.MODIFY_ON_WRITE && rootPageId == 0) {
// currently creating the index
return;
}
try {
PageData root = getPage(rootPageId, 0);
root.setRowCountStored(MathUtils.convertLongToInt(rowCount));
} finally {
store.incrementChangeCount();
}
}
public void add(Session session, Row row) {
boolean retry = false;
if (mainIndexColumn != -1) {
row.setKey(row.getValue(mainIndexColumn).getLong());
} else {
if (row.getKey() == 0) {
row.setKey((int) ++lastKey);
retry = true;
}
}
if (tableData.getContainsLargeObject()) {
for (int i = 0, len = row.getColumnCount(); i < len; i++) {
Value v = row.getValue(i);
Value v2 = v.link(database, getId());
if (v2.isLinked()) {
session.unlinkAtCommitStop(v2);
}
if (v != v2) {
row.setValue(i, v2);
}
}
}
// when using auto-generated values, it's possible that multiple
// tries are required (specially if there was originally a primary key)
if (trace.isDebugEnabled()) {
trace.debug("{0} add {1}", getName(), row);
}
long add = 0;
while (true) {
try {
addTry(session, row);
break;
} catch (DbException e) {
if (e != fastDuplicateKeyException) {
throw e;
}
if (!retry) {
throw getNewDuplicateKeyException();
}
if (add == 0) {
// in the first re-try add a small random number,
// to avoid collisions after a re-start
row.setKey((long) (row.getKey() + Math.random() * 10000));
} else {
row.setKey(row.getKey() + add);
}
add++;
} finally {
store.incrementChangeCount();
}
}
lastKey = Math.max(lastKey, row.getKey());
}
public void remove(Session session, Row row) {
if (tableData.getContainsLargeObject()) {
for (int i = 0, len = row.getColumnCount(); i < len; i++) {
Value v = row.getValue(i);
if (v.isLinked()) {
session.unlinkAtCommit(v);
}
}
}
if (trace.isDebugEnabled()) {
trace.debug("{0} remove {1}", getName(), row);
}
if (rowCount == 1) {
removeAllRows();
} else {
try {
long key = row.getKey();
PageData root = getPage(rootPageId, 0);
root.remove(key);
invalidateRowCount();
rowCount--;
} finally {
store.incrementChangeCount();
}
}
if (multiVersion) {
// if storage is null, the delete flag is not yet set
row.setDeleted(true);
if (delta == null) {
delta = New.hashSet();
}
boolean wasAdded = delta.remove(row);
if (!wasAdded) {
delta.add(row);
}
incrementRowCount(session.getId(), -1);
}
store.logAddOrRemoveRow(session, tableData.getId(), row, false);
}
private void addTry(Session session, Row row) {
while (true) {
PageData root = getPage(rootPageId, 0);
int splitPoint = root.addRowTry(row);
if (splitPoint == -1) {
break;
}
if (trace.isDebugEnabled()) {
trace.debug("{0} split", this);
}
long pivot = splitPoint == 0 ? row.getKey() : root.getKey(splitPoint - 1);
PageData page1 = root;
PageData page2 = root.split(splitPoint);
int id = store.allocatePage();
page1.setPageId(id);
page1.setParentPageId(rootPageId);
page2.setParentPageId(rootPageId);
PageDataNode newRoot = PageDataNode.create(this, rootPageId, PageData.ROOT);
newRoot.init(page1, pivot, page2);
store.update(page1);
store.update(page2);
store.update(newRoot);
root = newRoot;
}
row.setDeleted(false);
if (multiVersion) {
if (delta == null) {
delta = New.hashSet();
}
boolean wasDeleted = delta.remove(row);
if (!wasDeleted) {
delta.add(row);
}
incrementRowCount(session.getId(), 1);
}
invalidateRowCount();
rowCount++;
store.logAddOrRemoveRow(session, tableData.getId(), row, true);
}
public void truncate(Session session) {
if (trace.isDebugEnabled()) {
trace.debug("{0} truncate", this);
}
store.logTruncate(session, tableData.getId());
removeAllRows();
if (tableData.getContainsLargeObject() && tableData.isPersistData()) {
// unfortunately, the data is gone on rollback
session.commit(false);
database.getLobStorage().removeAllForTable(table.getId());
}
if (multiVersion) {
sessionRowCount.clear();
}
tableData.setRowCount(0);
}
public PageDataIndex(
RegularTable table,
int id,
IndexColumn[] columns,
IndexType indexType,
boolean create,
Session session) {
initBaseIndex(table, id, table.getName() + "_DATA", columns, indexType);
RegularDatabase database = (RegularDatabase) this.database;
this.multiVersion = database.isMultiVersion();
// trace = database.getTrace(Trace.PAGE_STORE + "_di");
// trace.setLevel(TraceSystem.DEBUG);
if (multiVersion) {
sessionRowCount = New.hashMap();
isMultiVersion = true;
} else {
sessionRowCount = null;
}
tableData = table;
this.store = database.getPageStore();
store.addIndex(this);
if (!database.isPersistent()) {
throw DbException.throwInternalError(table.getName());
}
if (create) {
rootPageId = store.allocatePage();
store.addMeta(this, session);
PageDataLeaf root = PageDataLeaf.create(this, rootPageId, PageData.ROOT);
store.update(root);
} else {
rootPageId = store.getRootPageId(id);
PageData root = getPage(rootPageId, 0);
lastKey = root.getLastKey();
rowCount = root.getRowCount();
}
if (trace.isDebugEnabled()) {
trace.debug("{0} opened rows: {1}", this, rowCount);
}
table.setRowCount(rowCount);
memoryPerPage = (Constants.MEMORY_PAGE_DATA + store.getPageSize()) >> 2;
}
/**
* The root page has changed.
*
* @param session the session
* @param newPos the new position
*/
void setRootPageId(Session session, int newPos) {
store.removeMeta(this, session);
this.rootPageId = newPos;
store.addMeta(this, session);
store.addIndex(this);
}