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* Copyright (C) 2010 by H-Store Project *
* Brown University *
* Massachusetts Institute of Technology *
* Yale University *
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package edu.brown.benchmark.markov.procedures;
import org.voltdb.SQLStmt;
import org.voltdb.VoltProcedure;
import org.voltdb.VoltTable;
import edu.brown.benchmark.markov.MarkovConstants;
/**
* This procedure creates many branches in the MarkovGraph - each one with a
* specific number of iterations through the while loop.
*
* @author svelagap
*/
public class ExecutionTime extends VoltProcedure {
// Should be single partition
public final SQLStmt selectA = new SQLStmt("SELECT A_IATTR02 FROM " + MarkovConstants.TABLENAME_TABLEA + " WHERE A_ID = ? ");
// ???
public final SQLStmt updateA = new SQLStmt("UPDATE " + MarkovConstants.TABLENAME_TABLEA + " SET A_IATTR02 = A_IATTR02 + ? WHERE A_ID = ?");
// Should be multi-partition
public final SQLStmt updateC = new SQLStmt("UPDATE " + MarkovConstants.TABLENAME_TABLEC + " SET C_IATTR02 = ? WHERE C_A_ID = ? ");
// Should be single-partition
public final SQLStmt updateB = new SQLStmt("UPDATE " + MarkovConstants.TABLENAME_TABLEB + " SET B_IATTR02 = B_IATTR02 + ? WHERE B_A_ID = ? ");
public VoltTable[] run(long a_id) {
voltQueueSQL(selectA, a_id);
// (SP) Read a single attribute value from the current partition
long writeToB = voltExecuteSQL()[0].getLong(0);
if (writeToB > 5) {
while (writeToB > 5) {
// depending on the value returned from A, we iterate through
// and increment B
// a silly way to do this, yes, but this is science!
voltQueueSQL(updateB, writeToB, a_id);
voltExecuteSQL();
writeToB--;
}
} else {
// Increment this attribute in A
voltQueueSQL(updateA, 1, a_id);
}
return voltExecuteSQL();
}
}