Examples with HashTableLoader org.apache.hadoop.hive.ql.exec.HashTableLoader used on opensource projects

Example 1 with HashTableLoader

use of org.apache.hadoop.hive.ql.exec.HashTableLoader in project hive by apache.

the class VectorMapJoinCommonOperator method getHashTableLoader.

/**
 * This override lets us substitute our own fast vectorized hash table loader.
 */
@Override
protected HashTableLoader getHashTableLoader(Configuration hconf) {
    HashTableImplementationType hashTableImplementationType = vectorDesc.getHashTableImplementationType();
    HashTableLoader hashTableLoader;
    switch(vectorDesc.getHashTableImplementationType()) {
        case OPTIMIZED:
            // Use the Tez hash table loader.
            hashTableLoader = HashTableLoaderFactory.getLoader(hconf);
            break;
        case FAST:
            // Use our specialized hash table loader.
            hashTableLoader = HiveConf.getVar(hconf, HiveConf.ConfVars.HIVE_EXECUTION_ENGINE).equals("spark") ? HashTableLoaderFactory.getLoader(hconf) : new VectorMapJoinFastHashTableLoader();
            break;
        default:
            throw new RuntimeException("Unknown vector map join hash table implementation type " + hashTableImplementationType.name());
    }
    return hashTableLoader;
}