package edu.caltech.nanodb.commands;
import edu.caltech.nanodb.server.NanoDBServer;
/**
* This Command class represents the <tt>EXPLAIN</tt> SQL command, which prints
* out details of how SQL DML statements will be evaluated.
*/
public class ExplainCommand extends Command {
/** The command to explain! */
private QueryCommand cmdToExplain;
/**
* Construct an explain command.
*
* @param cmdToExplain the command that should be explained.
*/
public ExplainCommand(QueryCommand cmdToExplain) {
super(Command.Type.UTILITY);
this.cmdToExplain = cmdToExplain;
}
@Override
public void execute(NanoDBServer server) throws ExecutionException {
cmdToExplain.setExplain(true);
cmdToExplain.execute(server);
}
}
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Donald H. (Donnie) Pinkston, III authoredeb289261