/** Initializes the group. */
public void initGroup(int size, boolean[] isGroupByFields) {
_groupItem = _tempGroupItem;
_groupItem.init(size, isGroupByFields);
if (_groupMap == null) _groupMap = new HashMap<GroupItem, GroupItem>();
}
/** Initializes the query state. */
public void init(DbTransaction xa, TableIterator[] tableIterators, boolean isReadOnly) {
if (_isLocked) throw new IllegalStateException();
Thread thread = Thread.currentThread();
if (_thread != null && _thread != thread)
throw new IllegalStateException(toString() + " attempted query reuse without close");
_thread = thread;
_xa = xa;
_isWrite = !isReadOnly;
_tableIterators = tableIterators;
_blockLockLength = tableIterators.length;
if (_blockLocks == null || _blockLocks.length < _blockLockLength)
_blockLocks = new Block[_blockLockLength];
else {
for (int i = _blockLockLength - 1; i >= 0; i--) _blockLocks[i] = null;
}
_rowUpdateCount = 0;
_groupItem = _tempGroupItem;
_groupItem.init(0, null);
}
