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From chenliang...@apache.org
Subject [23/52] [partial] incubator-carbondata git commit: Renamed packages to org.apache.carbondata and fixed errors
Date Mon, 15 Aug 2016 07:09:08 GMT
http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/AbsoluteTableIdentifier.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/AbsoluteTableIdentifier.java b/core/src/main/java/org/carbondata/core/carbon/AbsoluteTableIdentifier.java
deleted file mode 100644
index 7234a82..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/AbsoluteTableIdentifier.java
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon;
-
-import java.io.Serializable;
-
-import org.carbondata.core.datastorage.store.impl.FileFactory;
-
-/**
- * identifier which will have store path and carbon table identifier
- */
-public class AbsoluteTableIdentifier implements Serializable {
-
-  /**
-   * serializable version
-   */
-  private static final long serialVersionUID = 4695047103484427506L;
-
-  /**
-   * path of the store
-   */
-  private String storePath;
-
-  /**
-   * carbon table identifier which will have table name and table database
-   * name
-   */
-  private CarbonTableIdentifier carbonTableIdentifier;
-
-  public AbsoluteTableIdentifier(String storePath, CarbonTableIdentifier carbonTableIdentifier) {
-    //TODO this should be moved to common place where path handling will be handled
-    this.storePath = FileFactory.getUpdatedFilePath(storePath);
-    this.carbonTableIdentifier = carbonTableIdentifier;
-  }
-
-  /**
-   * @return the storePath
-   */
-  public String getStorePath() {
-    return storePath;
-  }
-
-  /**
-   * @return the carbonTableIdentifier
-   */
-  public CarbonTableIdentifier getCarbonTableIdentifier() {
-    return carbonTableIdentifier;
-  }
-
-  /**
-   * to get the hash code
-   */
-  @Override public int hashCode() {
-    final int prime = 31;
-    int result = 1;
-    result =
-        prime * result + ((carbonTableIdentifier == null) ? 0 : carbonTableIdentifier.hashCode());
-    result = prime * result + ((storePath == null) ? 0 : storePath.hashCode());
-    return result;
-  }
-
-  /**
-   * to check this class is equal to
-   * other object passed
-   *
-   * @param obj other object
-   */
-  @Override public boolean equals(Object obj) {
-    if (this == obj) {
-      return true;
-    }
-    if (obj == null) {
-      return false;
-    }
-    if (!(obj instanceof AbsoluteTableIdentifier)) {
-      return false;
-    }
-    AbsoluteTableIdentifier other = (AbsoluteTableIdentifier) obj;
-    if (carbonTableIdentifier == null) {
-      if (other.carbonTableIdentifier != null) {
-        return false;
-      }
-    } else if (!carbonTableIdentifier.equals(other.carbonTableIdentifier)) {
-      return false;
-    }
-    if (storePath == null) {
-      if (other.storePath != null) {
-        return false;
-      }
-    } else if (!storePath.equals(other.storePath)) {
-      return false;
-    }
-    return true;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/CarbonDataLoadSchema.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/CarbonDataLoadSchema.java b/core/src/main/java/org/carbondata/core/carbon/CarbonDataLoadSchema.java
deleted file mode 100644
index f23f600..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/CarbonDataLoadSchema.java
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon;
-
-import java.io.Serializable;
-import java.util.ArrayList;
-import java.util.List;
-
-import org.carbondata.core.carbon.metadata.schema.table.CarbonTable;
-
-/**
- * Wrapper Data Load Schema object which will be used to
- * support relation while data loading
- */
-public class CarbonDataLoadSchema implements Serializable {
-
-  /**
-   * default serializer
-   */
-  private static final long serialVersionUID = 1L;
-
-  /**
-   * CarbonTable info
-   */
-  private CarbonTable carbonTable;
-
-  /**
-   * dimension table and relation info
-   */
-  private List<DimensionRelation> dimensionRelationList;
-
-  /**
-   * CarbonDataLoadSchema constructor which takes CarbonTable
-   *
-   * @param carbonTable
-   */
-  public CarbonDataLoadSchema(CarbonTable carbonTable) {
-    this.carbonTable = carbonTable;
-    this.dimensionRelationList = new ArrayList<DimensionRelation>();
-  }
-
-  /**
-   * get dimension relation list
-   *
-   * @return dimensionRelationList
-   */
-  public List<DimensionRelation> getDimensionRelationList() {
-    return dimensionRelationList;
-  }
-
-  /**
-   * set dimensionrelation list
-   *
-   * @param dimensionRelationList
-   */
-  public void setDimensionRelationList(List<DimensionRelation> dimensionRelationList) {
-    this.dimensionRelationList = dimensionRelationList;
-  }
-
-  /**
-   * get carbontable
-   *
-   * @return carbonTable
-   */
-  public CarbonTable getCarbonTable() {
-    return carbonTable;
-  }
-
-  /**
-   * Dimension Relation object which will be filled from
-   * Load DML Command to support normalized table data load
-   */
-  public static class DimensionRelation implements Serializable {
-    /**
-     * default serializer
-     */
-    private static final long serialVersionUID = 1L;
-
-    /**
-     * dimension tableName
-     */
-    private String tableName;
-
-    /**
-     * dimensionSource csv path
-     */
-    private String dimensionSource;
-
-    /**
-     * relation with fact and dimension table
-     */
-    private Relation relation;
-
-    /**
-     * Columns to selected from dimension table.
-     * Hierarchy in-memory table should be prepared
-     * based on selected columns
-     */
-    private List<String> columns;
-
-    /**
-     * constructor
-     *
-     * @param tableName       - dimension table name
-     * @param dimensionSource - source file path
-     * @param relation        - fact foreign key with dimension primary key mapping
-     * @param columns         - list of columns to be used from this dimension table
-     */
-    public DimensionRelation(String tableName, String dimensionSource, Relation relation,
-        List<String> columns) {
-      this.tableName = tableName;
-      this.dimensionSource = dimensionSource;
-      this.relation = relation;
-      this.columns = columns;
-    }
-
-    /**
-     * @return tableName
-     */
-    public String getTableName() {
-      return tableName;
-    }
-
-    /**
-     * @return dimensionSource
-     */
-    public String getDimensionSource() {
-      return dimensionSource;
-    }
-
-    /**
-     * @return relation
-     */
-    public Relation getRelation() {
-      return relation;
-    }
-
-    /**
-     * @return columns
-     */
-    public List<String> getColumns() {
-      return columns;
-    }
-  }
-
-  /**
-   * Relation class to specify fact foreignkey column with
-   * dimension primary key column
-   */
-  public static class Relation implements Serializable {
-    /**
-     * default serializer
-     */
-    private static final long serialVersionUID = 1L;
-
-    /**
-     * Fact foreign key column
-     */
-    private String factForeignKeyColumn;
-
-    /**
-     * dimension primary key column
-     */
-    private String dimensionPrimaryKeyColumn;
-
-    /**
-     * constructor
-     *
-     * @param factForeignKeyColumn      - Fact Table Foreign key
-     * @param dimensionPrimaryKeyColumn - Dimension Table primary key
-     */
-    public Relation(String factForeignKeyColumn, String dimensionPrimaryKeyColumn) {
-      this.factForeignKeyColumn = factForeignKeyColumn;
-      this.dimensionPrimaryKeyColumn = dimensionPrimaryKeyColumn;
-    }
-
-    /**
-     * @return factForeignKeyColumn
-     */
-    public String getFactForeignKeyColumn() {
-      return factForeignKeyColumn;
-    }
-
-    /**
-     * @return dimensionPrimaryKeyColumn
-     */
-    public String getDimensionPrimaryKeyColumn() {
-      return dimensionPrimaryKeyColumn;
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/CarbonTableIdentifier.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/CarbonTableIdentifier.java b/core/src/main/java/org/carbondata/core/carbon/CarbonTableIdentifier.java
deleted file mode 100644
index 949522c..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/CarbonTableIdentifier.java
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package org.carbondata.core.carbon;
-
-import java.io.Serializable;
-
-/**
- * Identifier class which will hold the table qualified name
- */
-public class CarbonTableIdentifier implements Serializable {
-
-  /**
-   * database name
-   */
-  private String databaseName;
-
-  /**
-   * table name
-   */
-  private String tableName;
-
-  /**
-   * table id
-   */
-  private String tableId;
-
-  /**
-   * constructor
-   */
-  public CarbonTableIdentifier(String databaseName, String tableName, String tableId) {
-    this.databaseName = databaseName;
-    this.tableName = tableName;
-    this.tableId = tableId;
-  }
-
-  /**
-   * return database name
-   */
-  public String getDatabaseName() {
-    return databaseName;
-  }
-
-  /**
-   * return table name
-   */
-  public String getTableName() {
-    return tableName;
-  }
-
-  /**
-   * @return tableId
-   */
-  public String getTableId() {
-    return tableId;
-  }
-
-  /**
-   * @return table unique name
-   */
-  public String getTableUniqueName() {
-    return databaseName + '_' + tableName;
-  }
-
-  @Override public int hashCode() {
-    final int prime = 31;
-    int result = 1;
-    result = prime * result + ((databaseName == null) ? 0 : databaseName.hashCode());
-    result = prime * result + ((tableId == null) ? 0 : tableId.hashCode());
-    result = prime * result + ((tableName == null) ? 0 : tableName.hashCode());
-    return result;
-  }
-
-  @Override public boolean equals(Object obj) {
-    if (this == obj) {
-      return true;
-    }
-    if (obj == null) {
-      return false;
-    }
-    if (getClass() != obj.getClass()) {
-      return false;
-    }
-    CarbonTableIdentifier other = (CarbonTableIdentifier) obj;
-    if (databaseName == null) {
-      if (other.databaseName != null) {
-        return false;
-      }
-    } else if (!databaseName.equals(other.databaseName)) {
-      return false;
-    }
-    if (tableId == null) {
-      if (other.tableId != null) {
-        return false;
-      }
-    } else if (!tableId.equals(other.tableId)) {
-      return false;
-    }
-    if (tableName == null) {
-      if (other.tableName != null) {
-        return false;
-      }
-    } else if (!tableName.equals(other.tableName)) {
-      return false;
-    }
-    return true;
-  }
-
-  /*
- * @return table unidque name
- */
-  @Override public String toString() {
-    return databaseName + '_' + tableName;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/ColumnIdentifier.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/ColumnIdentifier.java b/core/src/main/java/org/carbondata/core/carbon/ColumnIdentifier.java
deleted file mode 100644
index 74d8b4d..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/ColumnIdentifier.java
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon;
-
-import java.io.Serializable;
-import java.util.Map;
-
-import org.carbondata.core.carbon.metadata.datatype.DataType;
-
-/**
- * Column unique identifier
- */
-public class ColumnIdentifier implements Serializable {
-
-  /**
-   *
-   */
-  private static final long serialVersionUID = 1L;
-
-  /**
-   * column id
-   */
-  private String columnId;
-
-  /**
-   * column properties
-   */
-  private Map<String, String> columnProperties;
-
-  private DataType dataType;
-
-  /**
-   * @param columnId
-   * @param columnProperties
-   */
-  public ColumnIdentifier(String columnId, Map<String, String> columnProperties,
-      DataType dataType) {
-    this.columnId = columnId;
-    this.columnProperties = columnProperties;
-    this.dataType = dataType;
-  }
-
-  /**
-   * @return columnId
-   */
-  public String getColumnId() {
-    return columnId;
-  }
-
-  /**
-   * @param columnProperty
-   * @return
-   */
-  public String getColumnProperty(String columnProperty) {
-    if (null != columnProperties) {
-      return columnProperties.get(columnProperty);
-    }
-    return null;
-  }
-
-  public DataType getDataType() {
-    return this.dataType;
-  }
-
-  @Override public int hashCode() {
-    final int prime = 31;
-    int result = 1;
-    result = prime * result + ((columnId == null) ? 0 : columnId.hashCode());
-    return result;
-  }
-
-  @Override public boolean equals(Object obj) {
-    if (this == obj) {
-      return true;
-    }
-    if (obj == null) {
-      return false;
-    }
-    if (getClass() != obj.getClass()) {
-      return false;
-    }
-    ColumnIdentifier other = (ColumnIdentifier) obj;
-    if (columnId == null) {
-      if (other.columnId != null) {
-        return false;
-      }
-    } else if (!columnId.equals(other.columnId)) {
-      return false;
-    }
-    return true;
-  }
-
-  @Override public String toString() {
-    return "ColumnIdentifier [columnId=" + columnId + "]";
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/BTreeBuilderInfo.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/BTreeBuilderInfo.java b/core/src/main/java/org/carbondata/core/carbon/datastore/BTreeBuilderInfo.java
deleted file mode 100644
index 338d80e..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/BTreeBuilderInfo.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore;
-
-import java.util.List;
-
-import org.carbondata.core.carbon.metadata.blocklet.DataFileFooter;
-
-/**
- * below class holds the meta data requires to build the blocks
- */
-public class BTreeBuilderInfo {
-
-  /**
-   * holds all the information about data
-   * file meta data
-   */
-  private List<DataFileFooter> footerList;
-
-  /**
-   * size of the each column value size
-   * this will be useful for reading
-   */
-  private int[] dimensionColumnValueSize;
-
-  public BTreeBuilderInfo(List<DataFileFooter> footerList,
-      int[] dimensionColumnValueSize) {
-    this.dimensionColumnValueSize = dimensionColumnValueSize;
-    this.footerList = footerList;
-  }
-
-  /**
-   * @return the eachDimensionBlockSize
-   */
-  public int[] getDimensionColumnValueSize() {
-    return dimensionColumnValueSize;
-  }
-
-  /**
-   * @return the footerList
-   */
-  public List<DataFileFooter> getFooterList() {
-    return footerList;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/BlockIndexStore.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/BlockIndexStore.java b/core/src/main/java/org/carbondata/core/carbon/datastore/BlockIndexStore.java
deleted file mode 100644
index 7ef7a24..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/BlockIndexStore.java
+++ /dev/null
@@ -1,309 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.Callable;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
-import java.util.concurrent.TimeUnit;
-
-import org.carbondata.common.logging.LogService;
-import org.carbondata.common.logging.LogServiceFactory;
-import org.carbondata.core.carbon.AbsoluteTableIdentifier;
-import org.carbondata.core.carbon.datastore.block.AbstractIndex;
-import org.carbondata.core.carbon.datastore.block.BlockIndex;
-import org.carbondata.core.carbon.datastore.block.TableBlockInfo;
-import org.carbondata.core.carbon.datastore.exception.IndexBuilderException;
-import org.carbondata.core.carbon.metadata.blocklet.DataFileFooter;
-import org.carbondata.core.constants.CarbonCommonConstants;
-import org.carbondata.core.util.CarbonProperties;
-import org.carbondata.core.util.CarbonUtil;
-import org.carbondata.core.util.CarbonUtilException;
-
-/**
- * Singleton Class to handle loading, unloading,clearing,storing of the table
- * blocks
- */
-public class BlockIndexStore {
-
-  private static final LogService LOGGER =
-      LogServiceFactory.getLogService(BlockIndexStore.class.getName());
-  /**
-   * singleton instance
-   */
-  private static final BlockIndexStore CARBONTABLEBLOCKSINSTANCE = new BlockIndexStore();
-
-  /**
-   * map to hold the table and its list of blocks
-   */
-  private Map<AbsoluteTableIdentifier, Map<TableBlockInfo, AbstractIndex>> tableBlocksMap;
-
-  /**
-   * map of block info to lock object map, while loading the btree this will be filled
-   * and removed after loading the tree for that particular block info, this will be useful
-   * while loading the tree concurrently so only block level lock will be applied another
-   * block can be loaded concurrently
-   */
-  private Map<TableBlockInfo, Object> blockInfoLock;
-
-  /**
-   * table and its lock object to this will be useful in case of concurrent
-   * query scenario when more than one query comes for same table and in that
-   * case it will ensure that only one query will able to load the blocks
-   */
-  private Map<AbsoluteTableIdentifier, Object> tableLockMap;
-
-  private BlockIndexStore() {
-    tableBlocksMap =
-        new ConcurrentHashMap<AbsoluteTableIdentifier, Map<TableBlockInfo, AbstractIndex>>(
-            CarbonCommonConstants.DEFAULT_COLLECTION_SIZE);
-    tableLockMap = new ConcurrentHashMap<AbsoluteTableIdentifier, Object>(
-        CarbonCommonConstants.DEFAULT_COLLECTION_SIZE);
-    blockInfoLock = new ConcurrentHashMap<TableBlockInfo, Object>();
-  }
-
-  /**
-   * Return the instance of this class
-   *
-   * @return singleton instance
-   */
-  public static BlockIndexStore getInstance() {
-    return CARBONTABLEBLOCKSINSTANCE;
-  }
-
-  /**
-   * below method will be used to load the block which are not loaded and to
-   * get the loaded blocks if all the blocks which are passed is loaded then
-   * it will not load , else it will load.
-   *
-   * @param tableBlocksInfos        list of blocks to be loaded
-   * @param absoluteTableIdentifier absolute Table Identifier to identify the table
-   * @throws IndexBuilderException
-   */
-  public List<AbstractIndex> loadAndGetBlocks(List<TableBlockInfo> tableBlocksInfos,
-      AbsoluteTableIdentifier absoluteTableIdentifier) throws IndexBuilderException {
-    AbstractIndex[] loadedBlock = new AbstractIndex[tableBlocksInfos.size()];
-    addTableLockObject(absoluteTableIdentifier);
-    // sort the block info
-    // so block will be loaded in sorted order this will be required for
-    // query execution
-    Collections.sort(tableBlocksInfos);
-    // get the instance
-    Object lockObject = tableLockMap.get(absoluteTableIdentifier);
-    Map<TableBlockInfo, AbstractIndex> tableBlockMapTemp = null;
-    int numberOfCores = 1;
-    try {
-      numberOfCores = Integer.parseInt(CarbonProperties.getInstance()
-          .getProperty(CarbonCommonConstants.NUM_CORES,
-              CarbonCommonConstants.NUM_CORES_DEFAULT_VAL));
-    } catch (NumberFormatException e) {
-      numberOfCores = Integer.parseInt(CarbonCommonConstants.NUM_CORES_DEFAULT_VAL);
-    }
-    ExecutorService executor = Executors.newFixedThreadPool(numberOfCores);
-    // Acquire the lock to ensure only one query is loading the table blocks
-    // if same block is assigned to both the queries
-    synchronized (lockObject) {
-      tableBlockMapTemp = tableBlocksMap.get(absoluteTableIdentifier);
-      // if it is loading for first time
-      if (null == tableBlockMapTemp) {
-        tableBlockMapTemp = new ConcurrentHashMap<TableBlockInfo, AbstractIndex>();
-        tableBlocksMap.put(absoluteTableIdentifier, tableBlockMapTemp);
-      }
-    }
-    AbstractIndex tableBlock = null;
-    List<Future<AbstractIndex>> blocksList = new ArrayList<Future<AbstractIndex>>();
-    int counter = -1;
-    for (TableBlockInfo blockInfo : tableBlocksInfos) {
-      counter++;
-      // if table block is already loaded then do not load
-      // that block
-      tableBlock = tableBlockMapTemp.get(blockInfo);
-      // if block is not loaded
-      if (null == tableBlock) {
-        // check any lock object is present in
-        // block info lock map
-        Object blockInfoLockObject = blockInfoLock.get(blockInfo);
-        // if lock object is not present then acquire
-        // the lock in block info lock and add a lock object in the map for
-        // particular block info, added double checking mechanism to add the lock
-        // object so in case of concurrent query we for same block info only one lock
-        // object will be added
-        if (null == blockInfoLockObject) {
-          synchronized (blockInfoLock) {
-            // again checking the block info lock, to check whether lock object is present
-            // or not if now also not present then add a lock object
-            blockInfoLockObject = blockInfoLock.get(blockInfo);
-            if (null == blockInfoLockObject) {
-              blockInfoLockObject = new Object();
-              blockInfoLock.put(blockInfo, blockInfoLockObject);
-            }
-          }
-        }
-        //acquire the lock for particular block info
-        synchronized (blockInfoLockObject) {
-          // check again whether block is present or not to avoid the
-          // same block is loaded
-          //more than once in case of concurrent query
-          tableBlock = tableBlockMapTemp.get(blockInfo);
-          // if still block is not present then load the block
-          if (null == tableBlock) {
-            blocksList.add(executor.submit(new BlockLoaderThread(blockInfo, tableBlockMapTemp)));
-          }
-        }
-      } else {
-        // if blocks is already loaded then directly set the block at particular position
-        //so block will be present in sorted order
-        loadedBlock[counter] = tableBlock;
-      }
-    }
-    // shutdown the executor gracefully and wait until all the task is finished
-    executor.shutdown();
-    try {
-      executor.awaitTermination(1, TimeUnit.HOURS);
-    } catch (InterruptedException e) {
-      throw new IndexBuilderException(e);
-    }
-    // fill the block which were not loaded before to loaded blocks array
-    fillLoadedBlocks(loadedBlock, blocksList);
-    return Arrays.asList(loadedBlock);
-  }
-
-  /**
-   * Below method will be used to fill the loaded blocks to the array
-   * which will be used for query execution
-   *
-   * @param loadedBlockArray array of blocks which will be filled
-   * @param blocksList       blocks loaded in thread
-   * @throws IndexBuilderException in case of any failure
-   */
-  private void fillLoadedBlocks(AbstractIndex[] loadedBlockArray,
-      List<Future<AbstractIndex>> blocksList) throws IndexBuilderException {
-    int blockCounter = 0;
-    for (int i = 0; i < loadedBlockArray.length; i++) {
-      if (null == loadedBlockArray[i]) {
-        try {
-          loadedBlockArray[i] = blocksList.get(blockCounter++).get();
-        } catch (InterruptedException | ExecutionException e) {
-          throw new IndexBuilderException(e);
-        }
-      }
-
-    }
-  }
-
-  private AbstractIndex loadBlock(Map<TableBlockInfo, AbstractIndex> tableBlockMapTemp,
-      TableBlockInfo blockInfo) throws CarbonUtilException {
-    AbstractIndex tableBlock;
-    DataFileFooter footer;
-    // getting the data file meta data of the block
-    footer = CarbonUtil.readMetadatFile(blockInfo.getFilePath(), blockInfo.getBlockOffset(),
-        blockInfo.getBlockLength());
-    tableBlock = new BlockIndex();
-    footer.setTableBlockInfo(blockInfo);
-    // building the block
-    tableBlock.buildIndex(Arrays.asList(footer));
-    tableBlockMapTemp.put(blockInfo, tableBlock);
-    // finally remove the lock object from block info lock as once block is loaded
-    // it will not come inside this if condition
-    blockInfoLock.remove(blockInfo);
-    return tableBlock;
-  }
-
-  /**
-   * Method to add table level lock if lock is not present for the table
-   *
-   * @param absoluteTableIdentifier
-   */
-  private synchronized void addTableLockObject(AbsoluteTableIdentifier absoluteTableIdentifier) {
-    // add the instance to lock map if it is not present
-    if (null == tableLockMap.get(absoluteTableIdentifier)) {
-      tableLockMap.put(absoluteTableIdentifier, new Object());
-    }
-  }
-
-  /**
-   * This will be used to remove a particular blocks useful in case of
-   * deletion of some of the blocks in case of retention or may be some other
-   * scenario
-   *
-   * @param removeTableBlocksInfos  blocks to be removed
-   * @param absoluteTableIdentifier absolute table identifier
-   */
-  public void removeTableBlocks(List<TableBlockInfo> removeTableBlocksInfos,
-      AbsoluteTableIdentifier absoluteTableIdentifier) {
-    // get the lock object if lock object is not present then it is not
-    // loaded at all
-    // we can return from here
-    Object lockObject = tableLockMap.get(absoluteTableIdentifier);
-    if (null == lockObject) {
-      return;
-    }
-    Map<TableBlockInfo, AbstractIndex> map = tableBlocksMap.get(absoluteTableIdentifier);
-    // if there is no loaded blocks then return
-    if (null == map) {
-      return;
-    }
-    for (TableBlockInfo blockInfos : removeTableBlocksInfos) {
-      map.remove(blockInfos);
-    }
-  }
-
-  /**
-   * remove all the details of a table this will be used in case of drop table
-   *
-   * @param absoluteTableIdentifier absolute table identifier to find the table
-   */
-  public void clear(AbsoluteTableIdentifier absoluteTableIdentifier) {
-    // removing all the details of table
-    tableLockMap.remove(absoluteTableIdentifier);
-    tableBlocksMap.remove(absoluteTableIdentifier);
-  }
-
-  /**
-   * Thread class which will be used to load the blocks
-   */
-  private class BlockLoaderThread implements Callable<AbstractIndex> {
-    /**
-     * table block info to block index map
-     */
-    private Map<TableBlockInfo, AbstractIndex> tableBlockMap;
-
-    // block info
-    private TableBlockInfo blockInfo;
-
-    private BlockLoaderThread(TableBlockInfo blockInfo,
-        Map<TableBlockInfo, AbstractIndex> tableBlockMap) {
-      this.tableBlockMap = tableBlockMap;
-      this.blockInfo = blockInfo;
-    }
-
-    @Override public AbstractIndex call() throws Exception {
-      // load and return the loaded blocks
-      return loadBlock(tableBlockMap, blockInfo);
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/BtreeBuilder.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/BtreeBuilder.java b/core/src/main/java/org/carbondata/core/carbon/datastore/BtreeBuilder.java
deleted file mode 100644
index f6ea7d0..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/BtreeBuilder.java
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore;
-
-/**
- * Below interface will be used to build the index
- * in some data structure
- */
-public interface BtreeBuilder {
-
-  /**
-   * Below method will be used to store the leaf collection in some data structure
-   */
-  void build(BTreeBuilderInfo blocksBuilderInfos);
-
-  /**
-   * below method to get the first data block
-   *
-   * @return data block
-   */
-  DataRefNode get();
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/DataRefNode.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/DataRefNode.java b/core/src/main/java/org/carbondata/core/carbon/datastore/DataRefNode.java
deleted file mode 100644
index 4bb551f..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/DataRefNode.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore;
-
-import org.carbondata.core.carbon.datastore.chunk.DimensionColumnDataChunk;
-import org.carbondata.core.carbon.datastore.chunk.MeasureColumnDataChunk;
-import org.carbondata.core.datastorage.store.FileHolder;
-
-/**
- * Interface data block reference
- */
-public interface DataRefNode {
-
-  /**
-   * Method to get the next block this can be used while scanning when
-   * iterator of this class can be used iterate over blocks
-   *
-   * @return next block
-   */
-  DataRefNode getNextDataRefNode();
-
-  /**
-   * to get the number of keys tuples present in the block
-   *
-   * @return number of keys in the block
-   */
-  int nodeSize();
-
-  /**
-   * Method can be used to get the block index .This can be used when multiple
-   * thread can be used scan group of blocks in that can we can assign the
-   * some of the blocks to one thread and some to other
-   *
-   * @return block number
-   */
-  long nodeNumber();
-
-  /**
-   * This method will be used to get the max value of all the columns this can
-   * be used in case of filter query
-   *
-   * @param max value of all the columns
-   */
-  byte[][] getColumnsMaxValue();
-
-  /**
-   * This method will be used to get the min value of all the columns this can
-   * be used in case of filter query
-   *
-   * @param min value of all the columns
-   */
-  byte[][] getColumnsMinValue();
-
-  /**
-   * Below method will be used to get the dimension chunks
-   *
-   * @param fileReader   file reader to read the chunks from file
-   * @param blockIndexes indexes of the blocks need to be read
-   * @return dimension data chunks
-   */
-  DimensionColumnDataChunk[] getDimensionChunks(FileHolder fileReader, int[] blockIndexes);
-
-  /**
-   * Below method will be used to get the dimension chunk
-   *
-   * @param fileReader file reader to read the chunk from file
-   * @param blockIndex block index to be read
-   * @return dimension data chunk
-   */
-  DimensionColumnDataChunk getDimensionChunk(FileHolder fileReader, int blockIndexes);
-
-  /**
-   * Below method will be used to get the measure chunk
-   *
-   * @param fileReader   file reader to read the chunk from file
-   * @param blockIndexes block indexes to be read from file
-   * @return measure column data chunk
-   */
-  MeasureColumnDataChunk[] getMeasureChunks(FileHolder fileReader, int[] blockIndexes);
-
-  /**
-   * Below method will be used to read the measure chunk
-   *
-   * @param fileReader file read to read the file chunk
-   * @param blockIndex block index to be read from file
-   * @return measure data chunk
-   */
-  MeasureColumnDataChunk getMeasureChunk(FileHolder fileReader, int blockIndex);
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/DataRefNodeFinder.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/DataRefNodeFinder.java b/core/src/main/java/org/carbondata/core/carbon/datastore/DataRefNodeFinder.java
deleted file mode 100644
index a4027cf..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/DataRefNodeFinder.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore;
-
-/**
- * Below Interface is to search a block
- */
-public interface DataRefNodeFinder {
-
-  /**
-   * Below method will be used to get the first tentative block which matches with
-   * the search key
-   *
-   * @param dataBlocks complete data blocks present
-   * @param serachKey  key to be search
-   * @return data block
-   */
-  DataRefNode findFirstDataBlock(DataRefNode dataBlocks, IndexKey searchKey);
-
-  /**
-   * Below method will be used to get the last tentative block which matches with
-   * the search key
-   *
-   * @param dataBlocks complete data blocks present
-   * @param serachKey  key to be search
-   * @return data block
-   */
-  DataRefNode findLastDataBlock(DataRefNode dataBlocks, IndexKey searchKey);
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/IndexKey.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/IndexKey.java b/core/src/main/java/org/carbondata/core/carbon/datastore/IndexKey.java
deleted file mode 100644
index 49d443c..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/IndexKey.java
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore;
-
-/**
- * Index class to store the index of the segment blocklet infos
- */
-public class IndexKey {
-
-  /**
-   * key which is generated from key generator
-   */
-  private byte[] dictionaryKeys;
-
-  /**
-   * key which was no generated using key generator
-   * <Index of FirstKey (2 bytes)><Index of SecondKey (2 bytes)><Index of NKey (2 bytes)>
-   * <First Key ByteArray><2nd Key ByteArray><N Key ByteArray>
-   */
-  private byte[] noDictionaryKeys;
-
-  public IndexKey(byte[] dictionaryKeys, byte[] noDictionaryKeys) {
-    this.dictionaryKeys = dictionaryKeys;
-    this.noDictionaryKeys = noDictionaryKeys;
-    if (null == dictionaryKeys) {
-      this.dictionaryKeys = new byte[0];
-    }
-    if (null == noDictionaryKeys) {
-      this.noDictionaryKeys = new byte[0];
-    }
-  }
-
-  /**
-   * @return the dictionaryKeys
-   */
-  public byte[] getDictionaryKeys() {
-    return dictionaryKeys;
-  }
-
-  /**
-   * @return the noDictionaryKeys
-   */
-  public byte[] getNoDictionaryKeys() {
-    return noDictionaryKeys;
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/SegmentTaskIndexStore.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/SegmentTaskIndexStore.java b/core/src/main/java/org/carbondata/core/carbon/datastore/SegmentTaskIndexStore.java
deleted file mode 100644
index c94a100..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/SegmentTaskIndexStore.java
+++ /dev/null
@@ -1,334 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.concurrent.ConcurrentHashMap;
-
-import org.carbondata.common.logging.LogService;
-import org.carbondata.common.logging.LogServiceFactory;
-import org.carbondata.core.carbon.AbsoluteTableIdentifier;
-import org.carbondata.core.carbon.datastore.block.AbstractIndex;
-import org.carbondata.core.carbon.datastore.block.SegmentTaskIndex;
-import org.carbondata.core.carbon.datastore.block.TableBlockInfo;
-import org.carbondata.core.carbon.datastore.exception.IndexBuilderException;
-import org.carbondata.core.carbon.metadata.blocklet.DataFileFooter;
-import org.carbondata.core.carbon.path.CarbonTablePath.DataFileUtil;
-import org.carbondata.core.constants.CarbonCommonConstants;
-import org.carbondata.core.util.CarbonUtil;
-import org.carbondata.core.util.CarbonUtilException;
-
-/**
- * Singleton Class to handle loading, unloading,clearing,storing of the table
- * blocks
- */
-public class SegmentTaskIndexStore {
-
-  private static final LogService LOGGER =
-      LogServiceFactory.getLogService(SegmentTaskIndexStore.class.getName());
-  /**
-   * singleton instance
-   */
-  private static final SegmentTaskIndexStore SEGMENTTASKINDEXSTORE = new SegmentTaskIndexStore();
-
-  /**
-   * mapping of table identifier to map of segmentId_taskId to table segment
-   * reason of so many map as each segment can have multiple data file and
-   * each file will have its own btree
-   */
-  private Map<AbsoluteTableIdentifier, Map<String, Map<String, AbstractIndex>>> tableSegmentMap;
-
-  /**
-   * map of block info to lock object map, while loading the btree this will be filled
-   * and removed after loading the tree for that particular block info, this will be useful
-   * while loading the tree concurrently so only block level lock will be applied another
-   * block can be loaded concurrently
-   */
-  private Map<String, Object> segmentLockMap;
-
-  /**
-   * table and its lock object to this will be useful in case of concurrent
-   * query scenario when more than one query comes for same table and in  that
-   * case it will ensure that only one query will able to load the blocks
-   */
-  private Map<AbsoluteTableIdentifier, Object> tableLockMap;
-
-  private SegmentTaskIndexStore() {
-    tableSegmentMap =
-        new ConcurrentHashMap<AbsoluteTableIdentifier, Map<String, Map<String, AbstractIndex>>>(
-            CarbonCommonConstants.DEFAULT_COLLECTION_SIZE);
-    tableLockMap = new ConcurrentHashMap<AbsoluteTableIdentifier, Object>(
-        CarbonCommonConstants.DEFAULT_COLLECTION_SIZE);
-    segmentLockMap = new ConcurrentHashMap<String, Object>();
-  }
-
-  /**
-   * Return the instance of this class
-   *
-   * @return singleton instance
-   */
-  public static SegmentTaskIndexStore getInstance() {
-    return SEGMENTTASKINDEXSTORE;
-  }
-
-  /**
-   * Below method will be used to load the segment of segments
-   * One segment may have multiple task , so  table segment will be loaded
-   * based on task id and will return the map of taksId to table segment
-   * map
-   *
-   * @param segmentToTableBlocksInfos segment id to block info
-   * @param absoluteTableIdentifier   absolute table identifier
-   * @return map of taks id to segment mapping
-   * @throws IndexBuilderException
-   */
-  public Map<String, AbstractIndex> loadAndGetTaskIdToSegmentsMap(
-      Map<String, List<TableBlockInfo>> segmentToTableBlocksInfos,
-      AbsoluteTableIdentifier absoluteTableIdentifier) throws IndexBuilderException {
-    // task id to segment map
-    Map<String, AbstractIndex> taskIdToTableSegmentMap =
-        new HashMap<String, AbstractIndex>(CarbonCommonConstants.DEFAULT_COLLECTION_SIZE);
-    addLockObject(absoluteTableIdentifier);
-    Iterator<Entry<String, List<TableBlockInfo>>> iteratorOverSegmentBlocksInfos =
-        segmentToTableBlocksInfos.entrySet().iterator();
-    Map<String, Map<String, AbstractIndex>> tableSegmentMapTemp =
-        addTableSegmentMap(absoluteTableIdentifier);
-    Map<String, AbstractIndex> taskIdToSegmentIndexMap = null;
-    String segmentId = null;
-    String taskId = null;
-    try {
-      while (iteratorOverSegmentBlocksInfos.hasNext()) {
-        // segment id to table block mapping
-        Entry<String, List<TableBlockInfo>> next = iteratorOverSegmentBlocksInfos.next();
-        // group task id to table block info mapping for the segment
-        Map<String, List<TableBlockInfo>> taskIdToTableBlockInfoMap =
-            mappedAndGetTaskIdToTableBlockInfo(segmentToTableBlocksInfos);
-        // get the existing map of task id to table segment map
-        segmentId = next.getKey();
-        // check if segment is already loaded, if segment is already loaded
-        //no need to load the segment block
-        taskIdToSegmentIndexMap = tableSegmentMapTemp.get(segmentId);
-        if (taskIdToSegmentIndexMap == null) {
-          // get the segment loader lock object this is to avoid
-          // same segment is getting loaded multiple times
-          // in case of concurrent query
-          Object segmentLoderLockObject = segmentLockMap.get(segmentId);
-          if (null == segmentLoderLockObject) {
-            segmentLoderLockObject = addAndGetSegmentLock(segmentId);
-          }
-          // acquire lock to lod the segment
-          synchronized (segmentLoderLockObject) {
-            taskIdToSegmentIndexMap = tableSegmentMapTemp.get(segmentId);
-            if (null == taskIdToSegmentIndexMap) {
-              // creating a map of take if to table segment
-              taskIdToSegmentIndexMap = new HashMap<String, AbstractIndex>();
-              Iterator<Entry<String, List<TableBlockInfo>>> iterator =
-                  taskIdToTableBlockInfoMap.entrySet().iterator();
-              while (iterator.hasNext()) {
-                Entry<String, List<TableBlockInfo>> taskToBlockInfoList = iterator.next();
-                taskId = taskToBlockInfoList.getKey();
-                taskIdToSegmentIndexMap.put(taskId,
-                    loadBlocks(taskId, taskToBlockInfoList.getValue(), absoluteTableIdentifier));
-              }
-              tableSegmentMapTemp.put(next.getKey(), taskIdToSegmentIndexMap);
-              // removing from segment lock map as once segment is loaded
-              //if concurrent query is coming for same segment
-              // it will wait on the lock so after this segment will be already
-              //loaded so lock is not required, that is why removing the
-              // the lock object as it wont be useful
-              segmentLockMap.remove(segmentId);
-            }
-          }
-          taskIdToTableSegmentMap.putAll(taskIdToSegmentIndexMap);
-        }
-      }
-    } catch (CarbonUtilException e) {
-      LOGGER.error("Problem while loading the segment");
-      throw new IndexBuilderException(e);
-    }
-    return taskIdToTableSegmentMap;
-  }
-
-  /**
-   * Below method will be used to get the segment level lock object
-   *
-   * @param segmentId
-   * @return lock object
-   */
-  private synchronized Object addAndGetSegmentLock(String segmentId) {
-    // get the segment lock object if it is present then return
-    // otherwise add the new lock and return
-    Object segmentLoderLockObject = segmentLockMap.get(segmentId);
-    if (null == segmentLoderLockObject) {
-      segmentLoderLockObject = new Object();
-      segmentLockMap.put(segmentId, segmentLoderLockObject);
-    }
-    return segmentLoderLockObject;
-  }
-
-  /**
-   * Below code is to add table lock map which will be used to
-   * add
-   *
-   * @param absoluteTableIdentifier
-   */
-  private synchronized void addLockObject(AbsoluteTableIdentifier absoluteTableIdentifier) {
-    // add the instance to lock map if it is not present
-    if (null == tableLockMap.get(absoluteTableIdentifier)) {
-      tableLockMap.put(absoluteTableIdentifier, new Object());
-    }
-  }
-
-  /**
-   * Below method will be used to get the table segment map
-   * if table segment is not present then it will add and return
-   *
-   * @param absoluteTableIdentifier
-   * @return table segment map
-   */
-  private Map<String, Map<String, AbstractIndex>> addTableSegmentMap(
-      AbsoluteTableIdentifier absoluteTableIdentifier) {
-    // get the instance of lock object
-    Object lockObject = tableLockMap.get(absoluteTableIdentifier);
-    Map<String, Map<String, AbstractIndex>> tableSegmentMapTemp =
-        tableSegmentMap.get(absoluteTableIdentifier);
-    if (null == tableSegmentMapTemp) {
-      synchronized (lockObject) {
-        // segment id to task id to table segment map
-        tableSegmentMapTemp = tableSegmentMap.get(absoluteTableIdentifier);
-        if (null == tableSegmentMapTemp) {
-          tableSegmentMapTemp = new ConcurrentHashMap<String, Map<String, AbstractIndex>>();
-          tableSegmentMap.put(absoluteTableIdentifier, tableSegmentMapTemp);
-        }
-      }
-    }
-    return tableSegmentMapTemp;
-  }
-
-  /**
-   * Below method will be used to load the blocks
-   *
-   * @param tableBlockInfoList
-   * @return loaded segment
-   * @throws CarbonUtilException
-   */
-  private AbstractIndex loadBlocks(String taskId, List<TableBlockInfo> tableBlockInfoList,
-      AbsoluteTableIdentifier tableIdentifier) throws CarbonUtilException {
-    // all the block of one task id will be loaded together
-    // so creating a list which will have all the data file meta data to of one task
-    List<DataFileFooter> footerList =
-        CarbonUtil.readCarbonIndexFile(taskId, tableBlockInfoList, tableIdentifier);
-    AbstractIndex segment = new SegmentTaskIndex();
-    // file path of only first block is passed as it all table block info path of
-    // same task id will be same
-    segment.buildIndex(footerList);
-    return segment;
-  }
-
-  /**
-   * Below method will be used to get the task id to all the table block info belongs to
-   * that task id mapping
-   *
-   * @param segmentToTableBlocksInfos segment if to table blocks info map
-   * @return task id to table block info mapping
-   */
-  private Map<String, List<TableBlockInfo>> mappedAndGetTaskIdToTableBlockInfo(
-      Map<String, List<TableBlockInfo>> segmentToTableBlocksInfos) {
-    Map<String, List<TableBlockInfo>> taskIdToTableBlockInfoMap =
-        new HashMap<String, List<TableBlockInfo>>();
-    Iterator<Entry<String, List<TableBlockInfo>>> iterator =
-        segmentToTableBlocksInfos.entrySet().iterator();
-    while (iterator.hasNext()) {
-      Entry<String, List<TableBlockInfo>> next = iterator.next();
-      List<TableBlockInfo> value = next.getValue();
-      for (TableBlockInfo blockInfo : value) {
-        String taskNo = DataFileUtil.getTaskNo(blockInfo.getFilePath());
-        List<TableBlockInfo> list = taskIdToTableBlockInfoMap.get(taskNo);
-        if (null == list) {
-          list = new ArrayList<TableBlockInfo>();
-          taskIdToTableBlockInfoMap.put(taskNo, list);
-        }
-        list.add(blockInfo);
-      }
-
-    }
-    return taskIdToTableBlockInfoMap;
-  }
-
-  /**
-   * remove all the details of a table this will be used in case of drop table
-   *
-   * @param absoluteTableIdentifier absolute table identifier to find the table
-   */
-  public void clear(AbsoluteTableIdentifier absoluteTableIdentifier) {
-    // removing all the details of table
-    tableLockMap.remove(absoluteTableIdentifier);
-    tableSegmentMap.remove(absoluteTableIdentifier);
-  }
-
-  /**
-   * Below method will be used to remove the segment block based on
-   * segment id is passed
-   *
-   * @param segmentToBeRemoved      segment to be removed
-   * @param absoluteTableIdentifier absoluteTableIdentifier
-   */
-  public void removeTableBlocks(List<String> segmentToBeRemoved,
-      AbsoluteTableIdentifier absoluteTableIdentifier) {
-    // get the lock object if lock object is not present then it is not
-    // loaded at all
-    // we can return from here
-    Object lockObject = tableLockMap.get(absoluteTableIdentifier);
-    if (null == lockObject) {
-      return;
-    }
-    // Acquire the lock and remove only those instance which was loaded
-    Map<String, Map<String, AbstractIndex>> map = tableSegmentMap.get(absoluteTableIdentifier);
-    // if there is no loaded blocks then return
-    if (null == map) {
-      return;
-    }
-    for (String segmentId : segmentToBeRemoved) {
-      map.remove(segmentId);
-    }
-  }
-
-  /**
-   * Below method will be used to check if segment blocks
-   * is already loaded or not
-   *
-   * @param absoluteTableIdentifier
-   * @param segmentId
-   * @return is loaded then return the loaded blocks otherwise null
-   */
-  public Map<String, AbstractIndex> getSegmentBTreeIfExists(
-      AbsoluteTableIdentifier absoluteTableIdentifier, String segmentId) {
-    Map<String, Map<String, AbstractIndex>> tableSegment =
-        tableSegmentMap.get(absoluteTableIdentifier);
-    if (null == tableSegment) {
-      return null;
-    }
-    return tableSegment.get(segmentId);
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/block/AbstractIndex.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/block/AbstractIndex.java b/core/src/main/java/org/carbondata/core/carbon/datastore/block/AbstractIndex.java
deleted file mode 100644
index 548522d..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/block/AbstractIndex.java
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore.block;
-
-import java.util.List;
-
-import org.carbondata.core.carbon.datastore.DataRefNode;
-import org.carbondata.core.carbon.metadata.blocklet.DataFileFooter;
-
-public abstract class AbstractIndex {
-
-  /**
-   * vo class which will hold the RS information of the block
-   */
-  protected SegmentProperties segmentProperties;
-
-  /**
-   * data block
-   */
-  protected DataRefNode dataRefNode;
-
-  /**
-   * total number of row present in the block
-   */
-  protected long totalNumberOfRows;
-
-  /**
-   * @return the totalNumberOfRows
-   */
-  public long getTotalNumberOfRows() {
-    return totalNumberOfRows;
-  }
-
-  /**
-   * @return the segmentProperties
-   */
-  public SegmentProperties getSegmentProperties() {
-    return segmentProperties;
-  }
-
-  /**
-   * @return the dataBlock
-   */
-  public DataRefNode getDataRefNode() {
-    return dataRefNode;
-  }
-
-  /**
-   * Below method will be used to load the data block
-   *
-   * @param blockInfo block detail
-   */
-  public abstract void buildIndex(List<DataFileFooter> footerList);
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/block/BlockIndex.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/block/BlockIndex.java b/core/src/main/java/org/carbondata/core/carbon/datastore/block/BlockIndex.java
deleted file mode 100644
index 3ace21d..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/block/BlockIndex.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.carbondata.core.carbon.datastore.block;
-
-import java.util.List;
-
-import org.carbondata.core.carbon.datastore.BTreeBuilderInfo;
-import org.carbondata.core.carbon.datastore.BtreeBuilder;
-import org.carbondata.core.carbon.datastore.impl.btree.BlockletBTreeBuilder;
-import org.carbondata.core.carbon.metadata.blocklet.DataFileFooter;
-
-/**
- * Class which is responsible for loading the b+ tree block. This class will
- * persist all the detail of a table block
- */
-public class BlockIndex extends AbstractIndex {
-
-  /**
-   * Below method will be used to load the data block
-   *
-   * @param blockInfo block detail
-   */
-  public void buildIndex(List<DataFileFooter> footerList) {
-    // create a metadata details
-    // this will be useful in query handling
-    segmentProperties = new SegmentProperties(footerList.get(0).getColumnInTable(),
-        footerList.get(0).getSegmentInfo().getColumnCardinality());
-    // create a segment builder info
-    BTreeBuilderInfo indexBuilderInfo =
-        new BTreeBuilderInfo(footerList, segmentProperties.getDimensionColumnsValueSize());
-    BtreeBuilder blocksBuilder = new BlockletBTreeBuilder();
-    // load the metadata
-    blocksBuilder.build(indexBuilderInfo);
-    dataRefNode = blocksBuilder.get();
-    totalNumberOfRows = footerList.get(0).getNumberOfRows();
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/cd6a4ff3/core/src/main/java/org/carbondata/core/carbon/datastore/block/Distributable.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/carbondata/core/carbon/datastore/block/Distributable.java b/core/src/main/java/org/carbondata/core/carbon/datastore/block/Distributable.java
deleted file mode 100644
index 977ee3a..0000000
--- a/core/src/main/java/org/carbondata/core/carbon/datastore/block/Distributable.java
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.carbondata.core.carbon.datastore.block;
-
-/**
- * Abstract class which is maintains the locations of node.
- */
-public abstract class Distributable implements Comparable<Distributable> {
-
-  public abstract String[] getLocations();
-}


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