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Posted to commits@kylin.apache.org by li...@apache.org on 2017/01/17 03:32:22 UTC

[17/21] kylin git commit: KYLIN-2400 remove byte[] interface in dictionary

KYLIN-2400 remove byte[] interface in dictionary

Signed-off-by: Li Yang <li...@apache.org>


Project: http://git-wip-us.apache.org/repos/asf/kylin/repo
Commit: http://git-wip-us.apache.org/repos/asf/kylin/commit/e769bfa0
Tree: http://git-wip-us.apache.org/repos/asf/kylin/tree/e769bfa0
Diff: http://git-wip-us.apache.org/repos/asf/kylin/diff/e769bfa0

Branch: refs/heads/master-cdh5.7
Commit: e769bfa004e9d548c5a042f02765cc093ce70ec1
Parents: e20e2b2
Author: xiefan46 <95...@qq.com>
Authored: Mon Jan 9 19:11:39 2017 +0800
Committer: Li Yang <li...@apache.org>
Committed: Tue Jan 17 10:54:22 2017 +0800

----------------------------------------------------------------------
 .../apache/kylin/common/util/Dictionary.java    | 46 ++++----------------
 .../apache/kylin/dict/AppendTrieDictionary.java | 19 ++++----
 .../org/apache/kylin/dict/CacheDictionary.java  | 13 ++++--
 .../apache/kylin/dict/DateStrDictionary.java    | 33 --------------
 .../apache/kylin/dict/DictionaryGenerator.java  |  2 +-
 .../org/apache/kylin/dict/NumberDictionary.java | 30 +------------
 .../kylin/dict/NumberDictionaryBuilder.java     |  8 ----
 .../apache/kylin/dict/TimeStrDictionary.java    | 29 ------------
 .../org/apache/kylin/dict/TrieDictionary.java   |  7 ++-
 .../kylin/dict/TrieDictionaryBuilder.java       |  2 +-
 .../apache/kylin/dict/TrieDictionaryForest.java | 27 +++---------
 .../kylin/dict/TrieDictionaryForestBuilder.java |  2 +-
 .../kylin/dict/AppendTrieDictionaryTest.java    | 10 ++---
 .../kylin/dict/DateStrDictionaryTest.java       |  3 --
 .../MultipleDictionaryValueEnumeratorTest.java  | 14 ------
 .../apache/kylin/dict/NumberDictionaryTest.java |  4 +-
 .../kylin/dict/TimeStrDictionaryTest.java       |  9 +++-
 .../dict/TrieDictionaryForestBenchmark.java     | 14 ++----
 .../kylin/dict/TrieDictionaryForestTest.java    | 11 ++---
 .../apache/kylin/dict/TrieDictionaryTest.java   | 19 ++++----
 .../kylin/measure/bitmap/BitmapMeasureType.java | 11 +++--
 .../kylin/measure/raw/RawMeasureType.java       |  7 ++-
 .../storage/gtrecord/DictGridTableTest.java     |  3 +-
 .../engine/mr/steps/MergeCuboidMapper.java      | 11 ++---
 .../mr/steps/NumberDictionaryForestTest.java    | 17 +++-----
 25 files changed, 92 insertions(+), 259 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-common/src/main/java/org/apache/kylin/common/util/Dictionary.java
----------------------------------------------------------------------
diff --git a/core-common/src/main/java/org/apache/kylin/common/util/Dictionary.java b/core-common/src/main/java/org/apache/kylin/common/util/Dictionary.java
index 1e172bc..9d675f9 100644
--- a/core-common/src/main/java/org/apache/kylin/common/util/Dictionary.java
+++ b/core-common/src/main/java/org/apache/kylin/common/util/Dictionary.java
@@ -94,8 +94,13 @@ abstract public class Dictionary<T> implements Serializable {
     final public int getIdFromValue(T value, int roundingFlag) throws IllegalArgumentException {
         if (isNullObjectForm(value))
             return nullId();
-        else
-            return getIdFromValueImpl(value, roundingFlag);
+        else {
+            int id = getIdFromValueImpl(value, roundingFlag);
+            if(id == -1){
+                throw new IllegalArgumentException("Value : " + value + "no exists");
+            }
+            return id;
+        }
     }
 
     final public boolean containsValue(T value) throws IllegalArgumentException {
@@ -136,9 +141,7 @@ abstract public class Dictionary<T> implements Serializable {
      * Convenient form of
      * <code>getIdFromValueBytes(value, offset, len, 0)</code>
      */
-    final public int getIdFromValueBytes(byte[] value, int offset, int len) throws IllegalArgumentException {
-        return getIdFromValueBytes(value, offset, len, 0);
-    }
+
 
     /**
      * A lower level API, return ID integer from raw value bytes. In case of not found 
@@ -153,31 +156,6 @@ abstract public class Dictionary<T> implements Serializable {
      *             if value is not found in dictionary and rounding is off;
      *             or if rounding cannot find a smaller or bigger ID
      */
-    final public int getIdFromValueBytes(byte[] value, int offset, int len, int roundingFlag) throws IllegalArgumentException {
-        if (isNullByteForm(value, offset, len))
-            return nullId();
-        else {
-            int id = getIdFromValueBytesImpl(value, offset, len, roundingFlag);
-            if (id == -1)
-                throw new IllegalArgumentException("Value '" + Bytes.toString(value, offset, len) + "' (" + Bytes.toStringBinary(value, offset, len) + ") not exists!");
-            return id;
-        }
-    }
-
-    protected boolean isNullByteForm(byte[] value, int offset, int len) {
-        return value == null;
-    }
-
-    abstract protected int getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag);
-
-    final public byte[] getValueBytesFromId(int id) {
-        if (isNullId(id))
-            return BytesUtil.EMPTY_BYTE_ARRAY;
-        else
-            return getValueBytesFromIdImpl(id);
-    }
-
-    abstract protected byte[] getValueBytesFromIdImpl(int id);
 
     /**
      * A lower level API, get byte values from ID, return the number of bytes
@@ -189,14 +167,6 @@ abstract public class Dictionary<T> implements Serializable {
      * @throws IllegalArgumentException
      *             if ID is not found in dictionary
      */
-    final public int getValueBytesFromId(int id, byte[] returnValue, int offset) throws IllegalArgumentException {
-        if (isNullId(id))
-            return -1;
-        else
-            return getValueBytesFromIdImpl(id, returnValue, offset);
-    }
-
-    abstract protected int getValueBytesFromIdImpl(int id, byte[] returnValue, int offset);
 
     abstract public void dump(PrintStream out);
 

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java b/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java
index b797167..3aef967 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/AppendTrieDictionary.java
@@ -97,6 +97,8 @@ public class AppendTrieDictionary<T> extends CacheDictionary<T> {
         enableCache();
     }
 
+
+
     public void initParams(String baseDir, int baseId, int maxId, int maxValueLength, int nValues, BytesConverter bytesConverter) throws IOException {
         this.baseDir = baseDir;
         this.baseId = baseId;
@@ -1113,7 +1115,7 @@ public class AppendTrieDictionary<T> extends CacheDictionary<T> {
     }
 
     @Override
-    protected int getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag) {
+    protected int getIdFromValueBytesWithoutCache(byte[] value, int offset, int len, int roundingFlag) {
         if (dictSliceMap.isEmpty()) {
             return -1;
         }
@@ -1129,6 +1131,11 @@ public class AppendTrieDictionary<T> extends CacheDictionary<T> {
     }
 
     @Override
+    protected byte[] getValueBytesFromIdWithoutCache(int id) {
+        throw new UnsupportedOperationException("AppendTrieDictionary can't retrive value from id");
+    }
+
+    @Override
     public int getMinId() {
         return baseId;
     }
@@ -1149,16 +1156,6 @@ public class AppendTrieDictionary<T> extends CacheDictionary<T> {
     }
 
 
-    @Override
-    protected byte[] getValueBytesFromIdImpl(int id) {
-        throw new UnsupportedOperationException("AppendTrieDictionary can't retrive value from id");
-    }
-
-    @Override
-    protected int getValueBytesFromIdImpl(int id, byte[] returnValue, int offset) {
-        throw new UnsupportedOperationException("AppendTrieDictionary can't retrive value from id");
-    }
-
     public void flushIndex(CachedTreeMap dictSliceMap, boolean keepAppend) throws IOException {
         try (FSDataOutputStream indexOut = dictSliceMap.openIndexOutput()) {
             indexOut.writeInt(baseId);

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/CacheDictionary.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/CacheDictionary.java b/core-dictionary/src/main/java/org/apache/kylin/dict/CacheDictionary.java
index b2bad53..156971d 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/CacheDictionary.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/CacheDictionary.java
@@ -52,13 +52,13 @@ public abstract class CacheDictionary<T> extends Dictionary<T> {
                 if (id != null)
                     return id.intValue();
                 byte[] valueBytes = bytesConvert.convertToBytes(value);
-                id = getIdFromValueBytes(valueBytes, 0, valueBytes.length, roundingFlag);
+                id = getIdFromValueBytesWithoutCache(valueBytes, 0, valueBytes.length, roundingFlag);
                 cache.put(value, id);
                 return id;
             }
         }
         byte[] valueBytes = bytesConvert.convertToBytes(value);
-        return getIdFromValueBytes(valueBytes, 0, valueBytes.length, roundingFlag);
+        return getIdFromValueBytesWithoutCache(valueBytes, 0, valueBytes.length, roundingFlag);
     }
 
     //id --> value
@@ -70,13 +70,13 @@ public abstract class CacheDictionary<T> extends Dictionary<T> {
                 int seq = calcSeqNoFromId(id);
                 if (cache[seq] != null)
                     return (T) cache[seq];
-                byte[] valueBytes = getValueBytesFromIdImpl(id);
+                byte[] valueBytes = getValueBytesFromIdWithoutCache(id);
                 T value = bytesConvert.convertFromBytes(valueBytes, 0, valueBytes.length);
                 cache[seq] = value;
                 return value;
             }
         }
-        byte[] valueBytes = getValueBytesFromIdImpl(id);
+        byte[] valueBytes = getValueBytesFromIdWithoutCache(id);
         return bytesConvert.convertFromBytes(valueBytes, 0, valueBytes.length);
     }
 
@@ -99,4 +99,9 @@ public abstract class CacheDictionary<T> extends Dictionary<T> {
         this.valueToIdCache = null;
         this.idToValueCache = null;
     }
+
+    abstract protected byte[] getValueBytesFromIdWithoutCache(int id);
+
+    abstract protected int getIdFromValueBytesWithoutCache(byte[] valueBytes, int offset, int length, int roundingFlag);
+
 }

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/DateStrDictionary.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/DateStrDictionary.java b/core-dictionary/src/main/java/org/apache/kylin/dict/DateStrDictionary.java
index 29bbee2..56b4994 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/DateStrDictionary.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/DateStrDictionary.java
@@ -26,7 +26,6 @@ import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
 import java.io.PrintStream;
-import java.io.UnsupportedEncodingException;
 import java.util.Date;
 
 import org.apache.commons.lang.StringUtils;
@@ -84,10 +83,6 @@ public class DateStrDictionary extends Dictionary<String> {
         return pattern.length();
     }
 
-    @Override
-    protected boolean isNullByteForm(byte[] value, int offset, int len) {
-        return value == null || len == 0;
-    }
 
     @Override
     final protected int getIdFromValueImpl(String value, int roundFlag) {
@@ -107,34 +102,6 @@ public class DateStrDictionary extends Dictionary<String> {
         return dateToString(new Date(millis), pattern);
     }
 
-    @Override
-    final protected int getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag) {
-        try {
-            return getIdFromValue(new String(value, offset, len, "ISO-8859-1"));
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e); // never happen
-        }
-    }
-
-    @Override
-    final protected byte[] getValueBytesFromIdImpl(int id) {
-        String date = getValueFromId(id);
-        byte[] bytes;
-        try {
-            bytes = date.getBytes("ISO-8859-1");
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e); // never happen
-        }
-        return bytes;
-    }
-
-    @Override
-    final protected int getValueBytesFromIdImpl(int id, byte[] returnValue, int offset) {
-        byte[] bytes = getValueBytesFromIdImpl(id);
-        System.arraycopy(bytes, 0, returnValue, offset, bytes.length);
-        return bytes.length;
-    }
-
     private int calcIdFromSeqNo(int seq) {
         return seq < 0 ? seq : baseId + seq;
     }

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/DictionaryGenerator.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/DictionaryGenerator.java b/core-dictionary/src/main/java/org/apache/kylin/dict/DictionaryGenerator.java
index 6f4f2c4..c23e7b5 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/DictionaryGenerator.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/DictionaryGenerator.java
@@ -227,7 +227,7 @@ public class DictionaryGenerator {
         @Override
         public void init(DictionaryInfo info, int baseId) throws IOException {
             this.baseId = baseId;
-            this.builder = new NumberDictionaryBuilder(new StringBytesConverter());
+            this.builder = new NumberDictionaryBuilder(new NumberDictionaryForestBuilder.Number2BytesConverter());
         }
         
         @Override

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionary.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionary.java b/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionary.java
index 9458e9d..c55937d 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionary.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionary.java
@@ -175,37 +175,9 @@ public class NumberDictionary<T> extends TrieDictionary<T> {
     }
 
     @Override
-    protected int getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag) {
-        NumberBytesCodec codec = getCodec();
-        codec.encodeNumber(value, offset, len);
-        return super.getIdFromValueBytesImpl(codec.buf, codec.bufOffset, codec.bufLen, roundingFlag);
-    }
-
-    @Override
     protected boolean isNullObjectForm(T value) {
         return value == null || value.equals("");
     }
+    
 
-    @Override
-    protected int getValueBytesFromIdImpl(int id, byte[] returnValue, int offset) {
-        NumberBytesCodec codec = getCodec();
-        codec.bufOffset = 0;
-        codec.bufLen = super.getValueBytesFromIdImpl(id, codec.buf, 0);
-        return codec.decodeNumber(returnValue, offset);
-    }
-
-
-    public static void main(String[] args) throws Exception {
-        NumberDictionaryBuilder<String> b = new NumberDictionaryBuilder<String>(new StringBytesConverter());
-        b.addValue("10");
-        b.addValue("100");
-        b.addValue("40");
-        b.addValue("7");
-        TrieDictionary<String> dict = b.build(0);
-
-        //dict.enableIdToValueBytesCache();
-        for (int i = 0; i <= dict.getMaxId(); i++) {
-            System.out.println(Bytes.toString(dict.getValueBytesFromId(i)));
-        }
-    }
 }
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionaryBuilder.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionaryBuilder.java b/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionaryBuilder.java
index 68a05d4..b9e94414 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionaryBuilder.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/NumberDictionaryBuilder.java
@@ -18,7 +18,6 @@
 
 package org.apache.kylin.dict;
 
-import org.apache.kylin.common.util.Bytes;
 
 /**
  * Use <code>NumberDictionaryForestBuilder</code> instead.
@@ -28,18 +27,11 @@ import org.apache.kylin.common.util.Bytes;
 @Deprecated
 public class NumberDictionaryBuilder<T> extends TrieDictionaryBuilder<T> {
 
-    NumberDictionary.NumberBytesCodec codec = new NumberDictionary.NumberBytesCodec(NumberDictionary.MAX_DIGITS_BEFORE_DECIMAL_POINT);
 
     public NumberDictionaryBuilder(BytesConverter<T> bytesConverter) {
         super(bytesConverter);
     }
 
-    @Override
-    void addValue(byte[] value) {
-        codec.encodeNumber(value, 0, value.length);
-        byte[] copy = Bytes.copy(codec.buf, codec.bufOffset, codec.bufLen);
-        super.addValue(copy);
-    }
 
     public NumberDictionary<T> build(int baseId) {
         byte[] trieBytes = buildTrieBytes(baseId);

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/TimeStrDictionary.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/TimeStrDictionary.java b/core-dictionary/src/main/java/org/apache/kylin/dict/TimeStrDictionary.java
index eabc9f1..d075ce1 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/TimeStrDictionary.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/TimeStrDictionary.java
@@ -22,7 +22,6 @@ import java.io.DataInput;
 import java.io.DataOutput;
 import java.io.IOException;
 import java.io.PrintStream;
-import java.io.UnsupportedEncodingException;
 
 import org.apache.kylin.common.util.DateFormat;
 import org.apache.kylin.common.util.Dictionary;
@@ -85,34 +84,6 @@ public class TimeStrDictionary extends Dictionary<String> {
     }
 
     @Override
-    final protected int getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag) {
-        try {
-            return getIdFromValue(new String(value, offset, len, "ISO-8859-1"));
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e); // never happen
-        }
-    }
-
-    @Override
-    final protected byte[] getValueBytesFromIdImpl(int id) {
-        String date = getValueFromId(id);
-        byte[] bytes;
-        try {
-            bytes = date.getBytes("ISO-8859-1");
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException(e); // never happen
-        }
-        return bytes;
-    }
-
-    @Override
-    final protected int getValueBytesFromIdImpl(int id, byte[] returnValue, int offset) {
-        byte[] bytes = getValueBytesFromIdImpl(id);
-        System.arraycopy(bytes, 0, returnValue, offset, bytes.length);
-        return bytes.length;
-    }
-
-    @Override
     public void dump(PrintStream out) {
         out.println(this.toString());
     }

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionary.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionary.java b/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionary.java
index 8e7f5dc..9b84734 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionary.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionary.java
@@ -141,7 +141,7 @@ public class TrieDictionary<T> extends CacheDictionary<T> {
 
 
     @Override
-    protected int getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag) {
+    protected int getIdFromValueBytesWithoutCache(byte[] value, int offset, int len, int roundingFlag) {
         int seq = lookupSeqNoFromValue(headSize, value, offset, offset + len, roundingFlag);
         int id = calcIdFromSeqNo(seq);
         if (id < 0)
@@ -236,7 +236,7 @@ public class TrieDictionary<T> extends CacheDictionary<T> {
 
 
     @Override
-    protected byte[] getValueBytesFromIdImpl(int id) {
+    protected byte[] getValueBytesFromIdWithoutCache(int id) {
         byte[] buf = new byte[maxValueLength];
         int len = getValueBytesFromIdImpl(id, buf, 0);
 
@@ -249,7 +249,6 @@ public class TrieDictionary<T> extends CacheDictionary<T> {
         }
     }
 
-    @Override
     protected int getValueBytesFromIdImpl(int id, byte[] returnValue, int offset) {
         int seq = calcSeqNoFromId(id);
         return lookupValueFromSeqNo(headSize, seq, returnValue, offset);
@@ -425,7 +424,7 @@ public class TrieDictionary<T> extends CacheDictionary<T> {
 
         //dict2.enableIdToValueBytesCache();
         for (int i = 0; i <= dict.getMaxId(); i++) {
-            System.out.println(Bytes.toString(dict.getValueBytesFromId(i)));
+            System.out.println(Bytes.toString(dict.getValueBytesFromIdWithoutCache(i)));
         }
     }
 }

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryBuilder.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryBuilder.java b/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryBuilder.java
index 598865b..102c49e 100644
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryBuilder.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryBuilder.java
@@ -74,7 +74,7 @@ public class TrieDictionaryBuilder<T> {
     // ============================================================================
 
     private Node root;
-    private BytesConverter<T> bytesConverter;
+    protected BytesConverter<T> bytesConverter;
 
     public TrieDictionaryBuilder(BytesConverter<T> bytesConverter) {
         this.root = new Node(new byte[0], false);

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForest.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForest.java b/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForest.java
index 69b4b9c..d1b5a99 100755
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForest.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForest.java
@@ -104,15 +104,7 @@ public class TrieDictionaryForest<T> extends CacheDictionary<T> {
     }
 
     @Override
-    protected int getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag) throws IllegalArgumentException {
-
-        int result = _getIdFromValueBytesImpl(value, offset, len, roundingFlag);
-        //logger.info("{} => {}, rounding {}", bytesConvert.convertFromBytes(value, offset, len), result, roundingFlag);
-        return result;
-    }
-
-    // id = tree_inner_offset + accumulate_offset + baseId
-    protected int _getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag) throws IllegalArgumentException {
+    protected int getIdFromValueBytesWithoutCache(byte[] value, int offset, int len, int roundingFlag) throws IllegalArgumentException {
         int index;
         if (trees.size() == 1) {
             index = 0;
@@ -136,27 +128,20 @@ public class TrieDictionaryForest<T> extends CacheDictionary<T> {
             }
         }
         TrieDictionary<T> tree = trees.get(index);
-        int id = tree.getIdFromValueBytes(value, offset, len, roundingFlag);
+        int id = tree.getIdFromValueBytesWithoutCache(value, offset, len, roundingFlag);
+        if(id == -1)
+            throw new IllegalArgumentException("Value '" + Bytes.toString(value, offset, len) + "' (" + Bytes.toStringBinary(value, offset, len) + ") not exists!");
         id = id + accuOffset.get(index);
         id += baseId;
         return id;
     }
 
     @Override
-    protected int getValueBytesFromIdImpl(int id, byte[] returnValue, int offset) throws IllegalArgumentException {
-        int index = (trees.size() == 1) ? 0 : findIndexById(id);
-        int treeInnerOffset = getTreeInnerOffset(id, index);
-        TrieDictionary<T> tree = trees.get(index);
-        int size = tree.getValueBytesFromIdImpl(treeInnerOffset, returnValue, offset);
-        return size;
-    }
-
-    @Override
-    protected byte[] getValueBytesFromIdImpl(int id) throws IllegalArgumentException {
+    protected byte[] getValueBytesFromIdWithoutCache(int id) throws IllegalArgumentException {
         int index = (trees.size() == 1) ? 0 : findIndexById(id);
         int treeInnerOffset = getTreeInnerOffset(id, index);
         TrieDictionary<T> tree = trees.get(index);
-        byte[] result = tree.getValueBytesFromId(treeInnerOffset);
+        byte[] result = tree.getValueBytesFromIdWithoutCache(treeInnerOffset);
         return result;
     }
 

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForestBuilder.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForestBuilder.java b/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForestBuilder.java
index af2e302..69da472 100755
--- a/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForestBuilder.java
+++ b/core-dictionary/src/main/java/org/apache/kylin/dict/TrieDictionaryForestBuilder.java
@@ -131,7 +131,7 @@ public class TrieDictionaryForestBuilder<T> {
         trees.add(tree);
         int minId = tree.getMinId();
         accuOffset.add(curOffset);
-        byte[] valueBytes = tree.getValueBytesFromId(minId);
+        byte[] valueBytes = tree.getValueBytesFromIdWithoutCache(minId);
         valueDivide.add(new ByteArray(valueBytes, 0, valueBytes.length));
         curOffset += (tree.getMaxId() + 1);
     }

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java
index 921925c..18913d0 100644
--- a/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java
+++ b/core-dictionary/src/test/java/org/apache/kylin/dict/AppendTrieDictionaryTest.java
@@ -180,7 +180,7 @@ public class AppendTrieDictionaryTest extends LocalFileMetadataTestCase {
         for (; checkIndex < firstAppend; checkIndex++) {
             String str = strList.get(checkIndex);
             byte[] bytes = converter.convertToBytes(str);
-            int id = dict.getIdFromValueBytesImpl(bytes, 0, bytes.length, 0);
+            int id = dict.getIdFromValueBytesWithoutCache(bytes, 0, bytes.length, 0);
             assertNotEquals(String.format("Value %s not exist", str), -1, id);
             assertFalse(String.format("Id %d for %s should be empty, but is %s", id, str, checkMap.get(id)), checkMap.containsKey(id) && !str.equals(checkMap.get(id)));
             checkMap.put(id, str);
@@ -200,7 +200,7 @@ public class AppendTrieDictionaryTest extends LocalFileMetadataTestCase {
         for (; checkIndex < secondAppend; checkIndex++) {
             String str = strList.get(checkIndex);
             byte[] bytes = converter.convertToBytes(str);
-            int id = dict.getIdFromValueBytesImpl(bytes, 0, bytes.length, 0);
+            int id = dict.getIdFromValueBytesWithoutCache(bytes, 0, bytes.length, 0);
             assertNotEquals(String.format("Value %s not exist", str), -1, id);
             if (checkIndex < firstAppend) {
                 assertEquals("Except id " + id + " for " + str + " but " + checkMap.get(id), str, checkMap.get(id));
@@ -224,7 +224,7 @@ public class AppendTrieDictionaryTest extends LocalFileMetadataTestCase {
         for (; checkIndex < strList.size(); checkIndex++) {
             String str = strList.get(checkIndex);
             byte[] bytes = converter.convertToBytes(str);
-            int id = dict.getIdFromValueBytesImpl(bytes, 0, bytes.length, 0);
+            int id = dict.getIdFromValueBytesWithoutCache(bytes, 0, bytes.length, 0);
             assertNotEquals(String.format("Value %s not exist", str), -1, id);
             if (checkIndex < secondAppend) {
                 assertEquals("Except id " + id + " for " + str + " but " + checkMap.get(id), str, checkMap.get(id));
@@ -237,7 +237,7 @@ public class AppendTrieDictionaryTest extends LocalFileMetadataTestCase {
         if (notfound != null) {
             for (String s : notfound) {
                 byte[] bytes = converter.convertToBytes(s);
-                int id = dict.getIdFromValueBytesImpl(bytes, 0, bytes.length, 0);
+                int id = dict.getIdFromValueBytesWithoutCache(bytes, 0, bytes.length, 0);
                 assertEquals(-1, id);
             }
         }
@@ -245,7 +245,7 @@ public class AppendTrieDictionaryTest extends LocalFileMetadataTestCase {
         dict = testSerialize(dict, converter);
         for (String str : strList) {
             byte[] bytes = converter.convertToBytes(str);
-            int id = dict.getIdFromValueBytesImpl(bytes, 0, bytes.length, 0);
+            int id = dict.getIdFromValueBytesWithoutCache(bytes, 0, bytes.length, 0);
             assertNotEquals(String.format("Value %s not exist", str), -1, id);
             assertEquals("Except id " + id + " for " + str + " but " + checkMap.get(id), str, checkMap.get(id));
         }

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/test/java/org/apache/kylin/dict/DateStrDictionaryTest.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/DateStrDictionaryTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/DateStrDictionaryTest.java
index ffc8ceb..c6d2e05 100644
--- a/core-dictionary/src/test/java/org/apache/kylin/dict/DateStrDictionaryTest.java
+++ b/core-dictionary/src/test/java/org/apache/kylin/dict/DateStrDictionaryTest.java
@@ -66,9 +66,6 @@ public class DateStrDictionaryTest {
     public void testNull() {
         int nullId = dict.getIdFromValue(null);
         assertNull(dict.getValueFromId(nullId));
-        int nullId2 = dict.getIdFromValueBytes(null, 0, 0);
-        assertEquals(dict.getValueBytesFromId(nullId2, null, 0), -1);
-        assertEquals(nullId, nullId2);
     }
 
     @Test

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/test/java/org/apache/kylin/dict/MultipleDictionaryValueEnumeratorTest.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/MultipleDictionaryValueEnumeratorTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/MultipleDictionaryValueEnumeratorTest.java
index 73e0935..2e90bcf 100644
--- a/core-dictionary/src/test/java/org/apache/kylin/dict/MultipleDictionaryValueEnumeratorTest.java
+++ b/core-dictionary/src/test/java/org/apache/kylin/dict/MultipleDictionaryValueEnumeratorTest.java
@@ -134,20 +134,6 @@ public class MultipleDictionaryValueEnumeratorTest {
             return "" + values[id];
         }
 
-        @Override
-        protected int getIdFromValueBytesImpl(byte[] value, int offset, int len, int roundingFlag) {
-            return 0;
-        }
-
-        @Override
-        protected byte[] getValueBytesFromIdImpl(int id) {
-            return null;
-        }
-
-        @Override
-        protected int getValueBytesFromIdImpl(int id, byte[] returnValue, int offset) {
-            return 0;
-        }
 
         @Override
         public void dump(PrintStream out) {}

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/test/java/org/apache/kylin/dict/NumberDictionaryTest.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/NumberDictionaryTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/NumberDictionaryTest.java
index 23e925c..38f2648 100644
--- a/core-dictionary/src/test/java/org/apache/kylin/dict/NumberDictionaryTest.java
+++ b/core-dictionary/src/test/java/org/apache/kylin/dict/NumberDictionaryTest.java
@@ -59,7 +59,7 @@ public class NumberDictionaryTest extends LocalFileMetadataTestCase {
 
     @Test
     public void testMinMax() {
-        NumberDictionaryBuilder<String> builder = new NumberDictionaryBuilder<String>(new StringBytesConverter());
+        NumberDictionaryBuilder<String> builder = new NumberDictionaryBuilder<String>(new NumberDictionaryForestBuilder.Number2BytesConverter());
         builder.addValue("" + Long.MAX_VALUE);
         builder.addValue("" + Long.MIN_VALUE);
         NumberDictionary<String> dict = builder.build(0);
@@ -123,7 +123,7 @@ public class NumberDictionaryTest extends LocalFileMetadataTestCase {
         int n = 100;
 
         Set<BigDecimal> set = Sets.newHashSet();
-        NumberDictionaryBuilder<String> builder = new NumberDictionaryBuilder<String>(new StringBytesConverter());
+        NumberDictionaryBuilder<String> builder = new NumberDictionaryBuilder<String>(new NumberDictionaryForestBuilder.Number2BytesConverter());
         for (int i = 0; i < n; i++) {
             String num = randNumber();
             if (set.add(new BigDecimal(num))) {

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/test/java/org/apache/kylin/dict/TimeStrDictionaryTest.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/TimeStrDictionaryTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/TimeStrDictionaryTest.java
index ce07a86..f981942 100644
--- a/core-dictionary/src/test/java/org/apache/kylin/dict/TimeStrDictionaryTest.java
+++ b/core-dictionary/src/test/java/org/apache/kylin/dict/TimeStrDictionaryTest.java
@@ -23,6 +23,8 @@ import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
+import static org.junit.Assert.fail;
+
 /**
  */
 public class TimeStrDictionaryTest {
@@ -62,7 +64,12 @@ public class TimeStrDictionaryTest {
 
     @Test
     public void testIllegal() {
-        Assert.assertEquals(-1, dict.getIdFromValue("2038-01-19 03:14:07"));
+        try{
+            dict.getIdFromValue("2038-01-19 03:14:07");
+            fail("should throw exception");
+        }catch (IllegalArgumentException e){
+            //correct
+        }
     }
 
     public void encodeDecode(String origin) {

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestBenchmark.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestBenchmark.java b/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestBenchmark.java
index 0b4c0e3..adc1074 100644
--- a/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestBenchmark.java
+++ b/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestBenchmark.java
@@ -25,7 +25,6 @@ import org.junit.Test;
 
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.List;
 import java.util.Random;
 import java.util.UUID;
 
@@ -123,7 +122,8 @@ public class TrieDictionaryForestBenchmark {
         int step = 1;
         for (int i = 0; i < testTimes; i++) {
             for (int j = 0; j < cardnality; j++) {
-                step |= dict.getValueBytesFromId(j).length;
+                //step |= dict.getValueBytesFromId(j).length;
+                step |= dict.getValueFromId(j).length();
             }
         }
         return System.currentTimeMillis() - startTime;
@@ -135,8 +135,7 @@ public class TrieDictionaryForestBenchmark {
         byte[] returnValue = new byte[2048];
         for (int i = 0; i < testTimes; i++) {
             for (int j = 0; j < cardnality; j++) {
-                int size = dict.getValueBytesFromId(j, returnValue, 0);
-                step |= size;
+                step |= dict.getValueFromId(j).length();
             }
         }
         return System.currentTimeMillis() - startTime;
@@ -154,16 +153,11 @@ public class TrieDictionaryForestBenchmark {
     }
 
     private long runQueryIdByValueBytes(ArrayList<String> rawData, Dictionary<String> dict, int cardnality, int testTimes) {
-        List<byte[]> testBytes = new ArrayList<>();
-        StringBytesConverter converter = new StringBytesConverter();
-        for (int i = 0; i < cardnality; i++) {
-            testBytes.add(converter.convertToBytes(rawData.get(i)));
-        }
         long startTime = System.currentTimeMillis();
         int step = 1;
         for (int i = 0; i < testTimes; i++) {
             for (int j = 0; j < cardnality; j++) {
-                step |= dict.getIdFromValueBytes(testBytes.get(j), 0, testBytes.get(j).length);
+                step |= dict.getIdFromValue(rawData.get(j));
             }
         }
         return System.currentTimeMillis() - startTime;

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestTest.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestTest.java
index 68cf301..c7fb9c4 100755
--- a/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestTest.java
+++ b/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryForestTest.java
@@ -641,7 +641,7 @@ public class TrieDictionaryForestTest {
         System.out.println("max memory:" + Runtime.getRuntime().maxMemory());
         System.gc();
         Thread.currentThread().sleep(1000);
-        NumberDictionaryBuilder<String> b = new NumberDictionaryBuilder<>(new StringBytesConverter());
+        NumberDictionaryBuilder<String> b = new NumberDictionaryBuilder<>(new NumberDictionaryForestBuilder.Number2BytesConverter());
         int k = 0;
         while (true) {
             b.addValue(k + "");
@@ -820,7 +820,7 @@ public class TrieDictionaryForestTest {
         for (int i = 0; i < times; i++) {
             for (int j = 0; j < n; j++) {
                 //System.out.println("looking for value:"+new String(array[j]));
-                keep |= dict.getIdFromValueBytes(array[j], 0, array[j].length);
+                keep |= dict.getIdFromValueBytesWithoutCache(array[j], 0, array[j].length, 0);
             }
         }
         long timeValueToIdByDict = System.currentTimeMillis() - start;
@@ -845,7 +845,7 @@ public class TrieDictionaryForestTest {
         start = System.currentTimeMillis();
         for (int i = 0; i < times; i++) {
             for (int j = 0; j < n; j++) {
-                keep |= dict.getValueBytesFromId(j, valueBytes, 0);
+                keep |= dict.getValueBytesFromIdWithoutCache(j).length;
             }
         }
         long timeIdToValueByDict = System.currentTimeMillis() - start;
@@ -884,7 +884,7 @@ public class TrieDictionaryForestTest {
             for (String s : notFound) {
                 try {
                     int nullId = dict.getIdFromValue(s);
-                    //System.out.println("null value id:" + nullId);
+                    System.out.println("null value id:" + nullId);
                     fail("For not found value '" + s + "', IllegalArgumentException is expected");
                 } catch (IllegalArgumentException e) {
                     // good
@@ -905,9 +905,6 @@ public class TrieDictionaryForestTest {
         // test null value
         int nullId = dict.getIdFromValue(null);
         assertNull(dict.getValueFromId(nullId));
-        int nullId2 = dict.getIdFromValueBytes(null, 0, 0);
-        assertEquals(dict.getValueBytesFromId(nullId2, null, 0), -1);
-        assertEquals(nullId, nullId2);
     }
 
     private Map<String, Integer> rightIdMap(int baseId, ArrayList<String> strs) {

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryTest.java
----------------------------------------------------------------------
diff --git a/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryTest.java b/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryTest.java
index a87d7cb..22a93a0 100644
--- a/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryTest.java
+++ b/core-dictionary/src/test/java/org/apache/kylin/dict/TrieDictionaryTest.java
@@ -47,7 +47,7 @@ public class TrieDictionaryTest {
         int count = (int) (Integer.MAX_VALUE * 0.8 / 64);
         benchmarkStringDictionary(new RandomStrings(count));
     }
-    
+
     private static class RandomStrings implements Iterable<String> {
         final private int size;
 
@@ -55,7 +55,7 @@ public class TrieDictionaryTest {
             this.size = size;
             System.out.println("size = " + size);
         }
-        
+
         @Override
         public Iterator<String> iterator() {
             return new Iterator<String>() {
@@ -71,11 +71,11 @@ public class TrieDictionaryTest {
                 public String next() {
                     if (hasNext() == false)
                         throw new NoSuchElementException();
-                    
+
                     i++;
                     if (i % 1000000 == 0)
                         System.out.println(i);
-                    
+
                     return nextString();
                 }
 
@@ -225,7 +225,7 @@ public class TrieDictionaryTest {
         TrieDictionaryBuilder<String> b = newDictBuilder(str);
         b.stats().print();
         TrieDictionary<String> dict = b.build(0);
-        
+
         TreeSet<String> set = new TreeSet<String>();
         for (String s : str) {
             set.add(s);
@@ -282,7 +282,7 @@ public class TrieDictionaryTest {
         start = System.currentTimeMillis();
         for (int i = 0; i < times; i++) {
             for (int j = 0; j < n; j++) {
-                keep |= dict.getIdFromValueBytes(array[j], 0, array[j].length);
+                keep |= dict.getIdFromValueBytesWithoutCache(array[j], 0, array[j].length, 0);
             }
         }
         long timeValueToIdByDict = System.currentTimeMillis() - start;
@@ -304,12 +304,12 @@ public class TrieDictionaryTest {
         start = System.currentTimeMillis();
         for (int i = 0; i < times; i++) {
             for (int j = 0; j < n; j++) {
-                keep |= dict.getValueBytesFromId(j, valueBytes, 0);
+                keep |= dict.getValueBytesFromIdWithoutCache(j).length;
             }
         }
         long timeIdToValueByDict = System.currentTimeMillis() - start;
         System.out.println(timeIdToValueByDict);
-        
+
         return keep;
     }
 
@@ -350,9 +350,6 @@ public class TrieDictionaryTest {
         // test null value
         int nullId = dict.getIdFromValue(null);
         assertNull(dict.getValueFromId(nullId));
-        int nullId2 = dict.getIdFromValueBytes(null, 0, 0);
-        assertEquals(dict.getValueBytesFromId(nullId2, null, 0), -1);
-        assertEquals(nullId, nullId2);
     }
 
     private static TrieDictionary<String> testSerialize(TrieDictionary<String> dict) {

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-metadata/src/main/java/org/apache/kylin/measure/bitmap/BitmapMeasureType.java
----------------------------------------------------------------------
diff --git a/core-metadata/src/main/java/org/apache/kylin/measure/bitmap/BitmapMeasureType.java b/core-metadata/src/main/java/org/apache/kylin/measure/bitmap/BitmapMeasureType.java
index b6f1975..de2a34a 100644
--- a/core-metadata/src/main/java/org/apache/kylin/measure/bitmap/BitmapMeasureType.java
+++ b/core-metadata/src/main/java/org/apache/kylin/measure/bitmap/BitmapMeasureType.java
@@ -18,6 +18,8 @@
 
 package org.apache.kylin.measure.bitmap;
 
+import static com.google.common.base.Preconditions.checkArgument;
+
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
@@ -38,8 +40,6 @@ import org.apache.kylin.metadata.realization.SQLDigest.SQLCall;
 
 import com.google.common.collect.ImmutableMap;
 
-import static com.google.common.base.Preconditions.checkArgument;
-
 /**
  * Created by sunyerui on 15/12/10.
  */
@@ -133,14 +133,13 @@ public class BitmapMeasureType extends MeasureType<BitmapCounter> {
                 Dictionary<String> mergedDict = newDicts.get(colRef);
 
                 MutableBitmapCounter retValue = new MutableBitmapCounter();
-                byte[] literal = new byte[sourceDict.getSizeOfValue()];
                 for (int id : value) {
                     int newId;
-                    int size = sourceDict.getValueBytesFromId(id, literal, 0);
-                    if (size < 0) {
+                    String v = sourceDict.getValueFromId(id);
+                    if (v == null) {
                         newId = mergedDict.nullId();
                     } else {
-                        newId = mergedDict.getIdFromValueBytes(literal, 0, size);
+                        newId = mergedDict.getIdFromValue(v);
                     }
                     retValue.add(newId);
                 }

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-metadata/src/main/java/org/apache/kylin/measure/raw/RawMeasureType.java
----------------------------------------------------------------------
diff --git a/core-metadata/src/main/java/org/apache/kylin/measure/raw/RawMeasureType.java b/core-metadata/src/main/java/org/apache/kylin/measure/raw/RawMeasureType.java
index a5bb06b..3b6e659 100644
--- a/core-metadata/src/main/java/org/apache/kylin/measure/raw/RawMeasureType.java
+++ b/core-metadata/src/main/java/org/apache/kylin/measure/raw/RawMeasureType.java
@@ -133,17 +133,16 @@ public class RawMeasureType extends MeasureType<List<ByteArray>> {
 
                 int valueSize = value.size();
                 byte[] newIdBuf = new byte[valueSize * mergedDict.getSizeOfId()];
-                byte[] literal = new byte[sourceDict.getSizeOfValue()];
 
                 int bufOffset = 0;
                 for (ByteArray c : value) {
                     int oldId = BytesUtil.readUnsigned(c.array(), c.offset(), c.length());
                     int newId;
-                    int size = sourceDict.getValueBytesFromId(oldId, literal, 0);
-                    if (size < 0) {
+                    String v = sourceDict.getValueFromId(oldId);
+                    if (v == null) {
                         newId = mergedDict.nullId();
                     } else {
-                        newId = mergedDict.getIdFromValueBytes(literal, 0, size);
+                        newId = mergedDict.getIdFromValue(v);
                     }
                     BytesUtil.writeUnsigned(newId, newIdBuf, bufOffset, mergedDict.getSizeOfId());
                     c.set(newIdBuf, bufOffset, mergedDict.getSizeOfId());

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/core-storage/src/test/java/org/apache/kylin/storage/gtrecord/DictGridTableTest.java
----------------------------------------------------------------------
diff --git a/core-storage/src/test/java/org/apache/kylin/storage/gtrecord/DictGridTableTest.java b/core-storage/src/test/java/org/apache/kylin/storage/gtrecord/DictGridTableTest.java
index fcd0182..ae186e2 100644
--- a/core-storage/src/test/java/org/apache/kylin/storage/gtrecord/DictGridTableTest.java
+++ b/core-storage/src/test/java/org/apache/kylin/storage/gtrecord/DictGridTableTest.java
@@ -35,6 +35,7 @@ import org.apache.kylin.common.util.LocalFileMetadataTestCase;
 import org.apache.kylin.common.util.Pair;
 import org.apache.kylin.cube.gridtable.CubeCodeSystem;
 import org.apache.kylin.dict.NumberDictionaryBuilder;
+import org.apache.kylin.dict.NumberDictionaryForestBuilder;
 import org.apache.kylin.dict.StringBytesConverter;
 import org.apache.kylin.dict.TrieDictionaryBuilder;
 import org.apache.kylin.dimension.DictionaryDimEnc;
@@ -601,7 +602,7 @@ public class DictGridTableTest extends LocalFileMetadataTestCase {
 
     @SuppressWarnings("rawtypes")
     private static Dictionary newDictionaryOfInteger() {
-        NumberDictionaryBuilder<String> builder = new NumberDictionaryBuilder<>(new StringBytesConverter());
+        NumberDictionaryBuilder<String> builder = new NumberDictionaryBuilder<>(new NumberDictionaryForestBuilder.Number2BytesConverter());
         builder.addValue("10");
         builder.addValue("20");
         builder.addValue("30");

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/MergeCuboidMapper.java
----------------------------------------------------------------------
diff --git a/engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/MergeCuboidMapper.java b/engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/MergeCuboidMapper.java
index a79d5aa..047e2b1 100644
--- a/engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/MergeCuboidMapper.java
+++ b/engine-mr/src/main/java/org/apache/kylin/engine/mr/steps/MergeCuboidMapper.java
@@ -186,8 +186,8 @@ public class MergeCuboidMapper extends KylinMapper<Text, Text, Text, Text> {
             if (this.checkNeedMerging(col)) {
                 // if dictionary on fact table column, needs rewrite
                 DictionaryManager dictMgr = DictionaryManager.getInstance(config);
-                Dictionary<?> sourceDict = dictMgr.getDictionary(sourceCubeSegment.getDictResPath(col));
-                Dictionary<?> mergedDict = dictMgr.getDictionary(mergedCubeSegment.getDictResPath(col));
+                Dictionary<String> sourceDict = dictMgr.getDictionary(sourceCubeSegment.getDictResPath(col));
+                Dictionary<String> mergedDict = dictMgr.getDictionary(mergedCubeSegment.getDictResPath(col));
 
                 while (sourceDict.getSizeOfValue() > newKeyBodyBuf.length - bufOffset || //
                         mergedDict.getSizeOfValue() > newKeyBodyBuf.length - bufOffset || //
@@ -200,11 +200,12 @@ public class MergeCuboidMapper extends KylinMapper<Text, Text, Text, Text> {
                 int idInSourceDict = BytesUtil.readUnsigned(splittedByteses[useSplit].value, 0, splittedByteses[useSplit].length);
                 int idInMergedDict;
 
-                int size = sourceDict.getValueBytesFromId(idInSourceDict, newKeyBodyBuf, bufOffset);
-                if (size < 0) {
+                //int size = sourceDict.getValueBytesFromId(idInSourceDict, newKeyBodyBuf, bufOffset);
+                String v = sourceDict.getValueFromId(idInSourceDict);
+                if (v == null) {
                     idInMergedDict = mergedDict.nullId();
                 } else {
-                    idInMergedDict = mergedDict.getIdFromValueBytes(newKeyBodyBuf, bufOffset, size);
+                    idInMergedDict = mergedDict.getIdFromValue(v);
                 }
 
                 BytesUtil.writeUnsigned(idInMergedDict, newKeyBodyBuf, bufOffset, mergedDict.getSizeOfId());

http://git-wip-us.apache.org/repos/asf/kylin/blob/e769bfa0/engine-mr/src/test/java/org/apache/kylin/engine/mr/steps/NumberDictionaryForestTest.java
----------------------------------------------------------------------
diff --git a/engine-mr/src/test/java/org/apache/kylin/engine/mr/steps/NumberDictionaryForestTest.java b/engine-mr/src/test/java/org/apache/kylin/engine/mr/steps/NumberDictionaryForestTest.java
index f6664bf..72793f5 100644
--- a/engine-mr/src/test/java/org/apache/kylin/engine/mr/steps/NumberDictionaryForestTest.java
+++ b/engine-mr/src/test/java/org/apache/kylin/engine/mr/steps/NumberDictionaryForestTest.java
@@ -38,7 +38,6 @@ import org.apache.kylin.common.util.Bytes;
 import org.apache.kylin.dict.NumberDictionary;
 import org.apache.kylin.dict.NumberDictionaryBuilder;
 import org.apache.kylin.dict.NumberDictionaryForestBuilder;
-import org.apache.kylin.dict.StringBytesConverter;
 import org.apache.kylin.dict.TrieDictionaryForest;
 import org.apache.kylin.engine.mr.steps.SelfDefineSortableKey.TypeFlag;
 import org.junit.Ignore;
@@ -121,7 +120,7 @@ public class NumberDictionaryForestTest {
         TrieDictionaryForest<String> dict = b.build();
         dict.dump(System.out);
 
-        NumberDictionaryBuilder<String> b2 = new NumberDictionaryBuilder<>(new StringBytesConverter());
+        NumberDictionaryBuilder<String> b2 = new NumberDictionaryBuilder<>(new NumberDictionaryForestBuilder.Number2BytesConverter());
         for (String str : testData)
             b2.addValue(str);
         NumberDictionary<String> dict2 = b2.build(0);
@@ -148,22 +147,20 @@ public class NumberDictionaryForestTest {
         
         assertTrue(dict1.getSizeOfId() == dict2.getSizeOfId());
         assertTrue(dict1.getSizeOfValue() == dict2.getSizeOfValue());
-        
+
         byte[] buf = new byte[dict1.getSizeOfValue()];
-        
+
         {
-            int len = dict1.getValueBytesFromId(0, buf, 0);
-            int newId = dict2.getIdFromValueBytes(buf, 0, len);
+            int newId = dict2.getIdFromValue(dict1.getValueFromId(0));
             assertTrue(newId == 0);
         }
         {
-            int len = dict1.getValueBytesFromId(1, buf, 0);
-            int newId = dict2.getIdFromValueBytes(buf, 0, len);
+
+            int newId = dict2.getIdFromValue(dict1.getValueFromId(1));
             assertTrue(newId == 2);
         }
         {
-            int len = dict1.getValueBytesFromId(2, buf, 0);
-            int newId = dict2.getIdFromValueBytes(buf, 0, len);
+            int newId = dict2.getIdFromValue(dict1.getValueFromId(2));
             assertTrue(newId == 4);
         }
     }