asterix-app/src/main/java/edu/uci/ics/asterix/file/IndexOperations.java

package edu.uci.ics.asterix.file;


import edu.uci.ics.asterix.aql.translator.DdlTranslator.CompiledIndexDropStatement;
import edu.uci.ics.asterix.common.config.OptimizationConfUtil;
import edu.uci.ics.asterix.common.context.AsterixIndexRegistryProvider;
import edu.uci.ics.asterix.common.context.AsterixStorageManagerInterface;
import edu.uci.ics.asterix.common.exceptions.AsterixException;
import edu.uci.ics.asterix.metadata.MetadataException;
import edu.uci.ics.asterix.metadata.declared.AqlCompiledMetadataDeclarations;
import edu.uci.ics.asterix.translator.DmlTranslator.CompiledCreateIndexStatement;
import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraint;
import edu.uci.ics.hyracks.algebricks.common.constraints.AlgebricksPartitionConstraintHelper;
import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
import edu.uci.ics.hyracks.algebricks.common.utils.Pair;
import edu.uci.ics.hyracks.algebricks.core.rewriter.base.PhysicalOptimizationConfig;
import edu.uci.ics.hyracks.api.job.JobSpecification;
import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndex;
import edu.uci.ics.hyracks.storage.am.common.dataflow.IIndexRegistryProvider;
import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDropOperatorDescriptor;
import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;

public class IndexOperations {

    private static final PhysicalOptimizationConfig physicalOptimizationConfig = OptimizationConfUtil
            .getPhysicalOptimizationConfig();

    public static JobSpecification buildSecondaryIndexCreationJobSpec(CompiledCreateIndexStatement createIndexStmt,
            AqlCompiledMetadataDeclarations metadata) throws AsterixException, AlgebricksException {
        SecondaryIndexCreator secondaryIndexCreator = SecondaryIndexCreator.createIndexCreator(createIndexStmt, metadata, physicalOptimizationConfig);
        return secondaryIndexCreator.buildCreationJobSpec();
    }
    
    public static JobSpecification buildSecondaryIndexLoadingJobSpec(CompiledCreateIndexStatement createIndexStmt,
            AqlCompiledMetadataDeclarations metadata) throws AsterixException, AlgebricksException {
        SecondaryIndexCreator secondaryIndexCreator = SecondaryIndexCreator.createIndexCreator(createIndexStmt, metadata, physicalOptimizationConfig);
        return secondaryIndexCreator.buildLoadingJobSpec();
    }
    
    public static JobSpecification buildDropSecondaryIndexJobSpec(CompiledIndexDropStatement deleteStmt,
            AqlCompiledMetadataDeclarations datasetDecls) throws AlgebricksException, MetadataException {
        String datasetName = deleteStmt.getDatasetName();
        String indexName = deleteStmt.getIndexName();

        JobSpecification spec = new JobSpecification();
        IIndexRegistryProvider<IIndex> indexRegistryProvider = AsterixIndexRegistryProvider.INSTANCE;
        IStorageManagerInterface storageManager = AsterixStorageManagerInterface.INSTANCE;

        Pair<IFileSplitProvider, AlgebricksPartitionConstraint> splitsAndConstraint = datasetDecls
                .splitProviderAndPartitionConstraintsForInternalOrFeedDataset(datasetName, indexName);
        TreeIndexDropOperatorDescriptor btreeDrop = new TreeIndexDropOperatorDescriptor(spec, storageManager,
                indexRegistryProvider, splitsAndConstraint.first);
        AlgebricksPartitionConstraintHelper
                .setPartitionConstraintInJobSpec(spec, btreeDrop, splitsAndConstraint.second);
        spec.addRoot(btreeDrop);

        return spec;
    }
}