public void close() throws SQLException {
Thread thread = _thread;
_thread = null;
unlock();
if (thread != null && thread != Thread.currentThread()) {
throw new IllegalStateException();
}
DbTransaction xa = _xa;
_xa = null;
// db/0a10
if (xa != null && xa.isAutoCommit()) xa.commit();
}
/** Executes the query. */
public boolean exists(QueryContext context, DbTransaction xa) throws SQLException {
SelectResult result = SelectResult.create(_nullExprs, null);
try {
TableIterator[] rows = result.initRows(getFromItems());
context.init(xa, rows, isReadOnly());
return execute(result, rows, context, xa);
} catch (IOException e) {
throw new SQLExceptionWrapper(e);
} finally {
context.unlock();
result.close();
}
}
