if (PactCompiler.HINT_LOCAL_STRATEGY_SORT_BOTH_MERGE.equals(localStrategy) ||
PactCompiler.HINT_LOCAL_STRATEGY_SORT_FIRST_MERGE.equals(localStrategy) ||
PactCompiler.HINT_LOCAL_STRATEGY_SORT_SECOND_MERGE.equals(localStrategy) ||
PactCompiler.HINT_LOCAL_STRATEGY_MERGE.equals(localStrategy) )
{
fixedDriverStrat = new SortMergeJoinDescriptor(this.keys1, this.keys2);
} else if (PactCompiler.HINT_LOCAL_STRATEGY_HASH_BUILD_FIRST.equals(localStrategy)) {
fixedDriverStrat = new HashJoinBuildFirstProperties(this.keys1, this.keys2);
} else if (PactCompiler.HINT_LOCAL_STRATEGY_HASH_BUILD_SECOND.equals(localStrategy)) {
fixedDriverStrat = new HashJoinBuildSecondProperties(this.keys1, this.keys2);
} else {
throw new CompilerException("Invalid local strategy hint for match contract: " + localStrategy);
}
ArrayList<OperatorDescriptorDual> list = new ArrayList<OperatorDescriptorDual>();
list.add(fixedDriverStrat);
return list;
}
else {
ArrayList<OperatorDescriptorDual> list = new ArrayList<OperatorDescriptorDual>();
joinHint = joinHint == null ? JoinHint.OPTIMIZER_CHOOSES : joinHint;
switch (joinHint) {
case BROADCAST_HASH_FIRST:
list.add(new HashJoinBuildFirstProperties(this.keys1, this.keys2, true, false, false));
break;
case BROADCAST_HASH_SECOND:
list.add(new HashJoinBuildSecondProperties(this.keys1, this.keys2, false, true, false));
break;
case REPARTITION_HASH_FIRST:
list.add(new HashJoinBuildFirstProperties(this.keys1, this.keys2, false, false, true));
break;
case REPARTITION_HASH_SECOND:
list.add(new HashJoinBuildSecondProperties(this.keys1, this.keys2, false, false, true));
break;
case REPARTITION_SORT_MERGE:
list.add(new SortMergeJoinDescriptor(this.keys1, this.keys2, false, false, true));
break;
case OPTIMIZER_CHOOSES:
list.add(new SortMergeJoinDescriptor(this.keys1, this.keys2));
list.add(new HashJoinBuildFirstProperties(this.keys1, this.keys2));
list.add(new HashJoinBuildSecondProperties(this.keys1, this.keys2));
break;
default:
throw new CompilerException("Unrecognized join hint: " + joinHint);