/**
* Executes a generic CompiledStatement. Execution includes first building any subquery result
* dependencies and clearing them after the main result is built.
*
* @return the result of executing the statement
* @param cs any valid CompiledStatement
*/
Result execute(CompiledStatement cs) {
Result result = null;
DatabaseManager.gc();
try {
cs.materializeSubQueries(session);
result = executeImpl(cs);
} catch (Throwable t) {
// t.printStackTrace();
result = new Result(t, cs.sql);
}
// clear redundant data
cs.dematerializeSubQueries();
if (result == null) {
result = emptyResult;
}
return result;
}
