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From piaoyats <...@git.apache.org>
Subject [GitHub] incubator-carbondata pull request #412: [CARBONDATA-519]Added vector reader ...
Date Thu, 15 Dec 2016 02:40:19 GMT
Github user piaoyats commented on a diff in the pull request:

    https://github.com/apache/incubator-carbondata/pull/412#discussion_r92534171
  
    --- Diff: core/src/main/java/org/apache/carbondata/scan/executor/QueryExecutorFactory.java
---
    @@ -18,15 +18,69 @@
      */
     package org.apache.carbondata.scan.executor;
     
    +import java.util.List;
    +
    +import org.apache.carbondata.core.carbon.metadata.datatype.DataType;
    +import org.apache.carbondata.core.carbon.metadata.encoder.Encoding;
     import org.apache.carbondata.scan.executor.impl.DetailQueryExecutor;
    +import org.apache.carbondata.scan.executor.impl.VectorDetailQueryExecutor;
    +import org.apache.carbondata.scan.model.QueryDimension;
    +import org.apache.carbondata.scan.model.QueryMeasure;
    +import org.apache.carbondata.scan.model.QueryModel;
    +import org.apache.carbondata.scan.result.vector.CarbonColumnVector;
    +import org.apache.carbondata.scan.result.vector.CarbonColumnarBatch;
    +import org.apache.carbondata.scan.result.vector.impl.CarbonColumnVectorImpl;
     
     /**
      * Factory class to get the query executor from RDD
      * This will return the executor based on query type
      */
     public class QueryExecutorFactory {
     
    -  public static QueryExecutor getQueryExecutor() {
    -    return new DetailQueryExecutor();
    +  public static QueryExecutor getQueryExecutor(QueryModel queryModel) {
    +    if (queryModel.isVectorReader()) {
    +      return new VectorDetailQueryExecutor();
    +    } else {
    +      return new DetailQueryExecutor();
    +    }
    +  }
    +
    +  public static CarbonColumnarBatch createColuminarBatch(QueryModel queryModel) {
    +    int batchSize = 10000;
    +    List<QueryDimension> queryDimension = queryModel.getQueryDimension();
    +    List<QueryMeasure> queryMeasures = queryModel.getQueryMeasures();
    +    CarbonColumnVector[] vectors =
    +        new CarbonColumnVector[queryDimension.size() + queryMeasures.size()];
    +    for (int i = 0; i < queryDimension.size(); i++) {
    +      QueryDimension dim = queryDimension.get(i);
    +      if (dim.getDimension().hasEncoding(Encoding.DIRECT_DICTIONARY)) {
    +        vectors[dim.getQueryOrder()] = new CarbonColumnVectorImpl(batchSize, DataType.LONG);
    +      } else if (!dim.getDimension().hasEncoding(Encoding.DICTIONARY)) {
    +        vectors[dim.getQueryOrder()] =
    +            new CarbonColumnVectorImpl(batchSize, dim.getDimension().getDataType());
    +      } else if (dim.getDimension().isComplex()) {
    +        vectors[dim.getQueryOrder()] = new CarbonColumnVectorImpl(batchSize, DataType.STRUCT);
    +      } else {
    +        vectors[dim.getQueryOrder()] = new CarbonColumnVectorImpl(batchSize, DataType.INT);
    +      }
    +    }
    +
    +    for (int i = 0; i < queryMeasures.size(); i++) {
    +      QueryMeasure msr = queryMeasures.get(i);
    +      switch (msr.getMeasure().getDataType()) {
    +        case SHORT:
    +        case INT:
    +        case LONG:
    +          vectors[msr.getQueryOrder()] =
    +              new CarbonColumnVectorImpl(batchSize, msr.getMeasure().getDataType());
    +          break;
    +        case DECIMAL:
    +          vectors[msr.getQueryOrder()] = new CarbonColumnVectorImpl(batchSize, DataType.DECIMAL);
    +          break;
    +        default:
    +          vectors[msr.getQueryOrder()] = new CarbonColumnVectorImpl(batchSize, DataType.DOUBLE);
    +      }
    --- End diff --
    
    what is the difference between msr.getMeasure().getDataType() with DataType.Decimal and
DataType.DOUBLE?
    Seems that case DECIMAL logic can merge witch LONG
    
    can we just use vectors[msr.getQueryOrder()] =
                  new CarbonColumnVectorImpl(batchSize, msr.getMeasure().getDataType()); 
for all measure data type ?


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