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);
}