diff --git a/src/org/redkale/source/DataJdbcSource.java b/src/org/redkale/source/DataJdbcSource.java
index d458ebbf6..68fc4dab8 100644
--- a/src/org/redkale/source/DataJdbcSource.java
+++ b/src/org/redkale/source/DataJdbcSource.java
@@ -318,7 +318,7 @@ public class DataJdbcSource extends DataSqlSource<Connection> {
                 for (FilterFuncColumn ffc : columns) {
                     for (String col : ffc.cols()) {
                         Object o = set.getObject(++index);
-                        Number rs = ffc.defvalue;
+                        Number rs = ffc.getDefvalue();
                         if (o != null) rs = (Number) o;
                         map.put(ffc.col(col), rs);
                     }
@@ -371,7 +371,7 @@ public class DataJdbcSource extends DataSqlSource<Connection> {
             Map<K, N> rs = new LinkedHashMap<>();
             ResultSet set = stmt.executeQuery(sql);
             ResultSetMetaData rsd = set.getMetaData();
-            boolean smallint = rsd.getColumnType(1) == Types.SMALLINT;
+            boolean smallint = rsd == null ? false : rsd.getColumnType(1) == Types.SMALLINT;
             while (set.next()) {
                 rs.put((K) (smallint ? set.getShort(1) : set.getObject(1)), (N) set.getObject(2));
             }
diff --git a/src/org/redkale/source/DataSqlSource.java b/src/org/redkale/source/DataSqlSource.java
index 9ca44ccb1..629907794 100644
--- a/src/org/redkale/source/DataSqlSource.java
+++ b/src/org/redkale/source/DataSqlSource.java
@@ -8,7 +8,7 @@ package org.redkale.source;
 import java.io.Serializable;
 import java.net.URL;
 import java.nio.ByteBuffer;
-import java.sql.SQLException;
+import java.sql.*;
 import java.util.*;
 import java.util.concurrent.*;
 import java.util.concurrent.atomic.*;
@@ -145,6 +145,26 @@ public abstract class DataSqlSource<DBChannel> extends AbstractService implement
     //查询一页数据
     protected abstract <T> CompletableFuture<Sheet<T>> querySheetDB(final EntityInfo<T> info, final boolean needtotal, final SelectColumn selects, final Flipper flipper, final FilterNode node);
 
+    protected <T> T infoGetValue(EntityInfo<T> info, final SelectColumn sels, final ResultSet set) throws SQLException {
+        return info.getValue(sels, set);
+    }
+
+    protected <T> String createSQLOrderby(EntityInfo<T> info, Flipper flipper) {
+        return info.createSQLOrderby(flipper);
+    }
+
+    protected Map<Class, String> getJoinTabalis(FilterNode node) {
+        return node == null ? null : node.getJoinTabalis();
+    }
+
+    protected <T> CharSequence createSQLJoin(FilterNode node, final Function<Class, EntityInfo> func, final boolean update, final Map<Class, String> joinTabalis, final Set<String> haset, final EntityInfo<T> info) {
+        return node == null ? null : node.createSQLJoin(func, update, joinTabalis, haset, info);
+    }
+
+    protected <T> CharSequence createSQLExpress(FilterNode node, final EntityInfo<T> info, final Map<Class, String> joinTabalis) {
+        return node == null ? null : node.createSQLExpress(info, joinTabalis);
+    }
+
     @Override
     protected ExecutorService getExecutor() {
         return executor;
diff --git a/src/org/redkale/source/FilterFuncColumn.java b/src/org/redkale/source/FilterFuncColumn.java
index 1df589151..d12032dd0 100644
--- a/src/org/redkale/source/FilterFuncColumn.java
+++ b/src/org/redkale/source/FilterFuncColumn.java
@@ -40,11 +40,11 @@ public class FilterFuncColumn implements java.io.Serializable {
         return new FilterFuncColumn(func, defvalue, columns);
     }
 
-    String[] cols() {
+    public String[] cols() {
         return columns == null || columns.length == 0 ? new String[]{COLUMN_NULL} : columns;
     }
 
-    String col(String column) {
+    public String col(String column) {
         return column == null || column.isEmpty() ? COLUMN_NULL : column;
     }
 
diff --git a/src/org/redkale/util/ByteBufferReader.java b/src/org/redkale/util/ByteBufferReader.java
new file mode 100644
index 000000000..cd0e3d7d9
--- /dev/null
+++ b/src/org/redkale/util/ByteBufferReader.java
@@ -0,0 +1,229 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package org.redkale.util;
+
+import java.nio.ByteBuffer;
+import java.util.*;
+
+/**
+ * 以ByteBuffer为数据载体的Reader <br>
+ * 注意：ByteBuffer必须是BIG_ENDIAN，且最小可读空间至少是8
+ *
+ * <p>
+ * 详情见: https://redkale.org
+ *
+ * @author zhangjx
+ */
+public class ByteBufferReader {
+
+    private ByteBuffer[] buffers;
+
+    private int currIndex;
+
+    private ByteBuffer currBuffer;
+
+    public ByteBufferReader(Collection<ByteBuffer> buffers) {
+        Objects.requireNonNull(buffers);
+        this.buffers = buffers.toArray(new ByteBuffer[buffers.size()]);
+        this.currBuffer = this.buffers[0];
+        this.currIndex = 0;
+    }
+
+    public ByteBufferReader(ByteBuffer[] buffers) {
+        Objects.requireNonNull(buffers);
+        this.buffers = buffers;
+        this.currBuffer = this.buffers[0];
+        this.currIndex = 0;
+    }
+
+    public ByteBufferReader(ByteBuffer buffer) {
+        Objects.requireNonNull(buffer);
+        this.buffers = new ByteBuffer[]{buffer};
+        this.currBuffer = this.buffers[0];
+        this.currIndex = 0;
+    }
+
+    public static ByteBufferReader create(ByteBuffer buffer) {
+        return new ByteBufferReader(buffer);
+    }
+
+    public static ByteBufferReader create(Collection<ByteBuffer> buffers) {
+        return new ByteBufferReader(buffers);
+    }
+
+    public static ByteBufferReader create(ByteBuffer[] buffers) {
+        return new ByteBufferReader(buffers);
+    }
+    
+    public boolean hasRemaining(){
+        return this.currBuffer.hasRemaining();
+    }
+
+    public byte get() {
+        ByteBuffer buf = this.currBuffer;
+        if (!buf.hasRemaining()) {
+            buf = this.buffers[++this.currIndex];
+            this.currBuffer = buf;
+        }
+        return this.currBuffer.get();
+    }
+
+    public short getShort() {
+        ByteBuffer buf = this.currBuffer;
+        int remain = buf.remaining();
+        if (remain >= 2) return buf.getShort();
+        if (remain == 0) {
+            buf = this.buffers[++this.currIndex];
+            this.currBuffer = buf;
+            return buf.getShort();
+        }
+        return (short) ((buf.get() << 8) | (get() & 0xff));
+    }
+
+    public int getInt() {
+        ByteBuffer buf = this.currBuffer;
+        int remain = buf.remaining();
+        if (remain >= 4) return buf.getInt();
+        if (remain == 0) {
+            buf = this.buffers[++this.currIndex];
+            this.currBuffer = buf;
+            return buf.getInt();
+        }
+        if (remain == 1) {
+            return ((buf.get() << 24)
+                | ((get() & 0xff) << 16)
+                | ((get() & 0xff) << 8)
+                | ((get() & 0xff)));
+        }
+        if (remain == 2) {
+            return ((buf.get() << 24)
+                | ((buf.get() & 0xff) << 16)
+                | ((get() & 0xff) << 8)
+                | ((get() & 0xff)));
+        }
+        //remain == 3
+        return ((buf.get() << 24)
+            | ((buf.get() & 0xff) << 16)
+            | ((buf.get() & 0xff) << 8)
+            | ((get() & 0xff)));
+    }
+
+    public float getFloat() {
+        return Float.intBitsToFloat(getInt());
+    }
+
+    public long getLong() {
+        ByteBuffer buf = this.currBuffer;
+        int remain = buf.remaining();
+        if (remain >= 8) return buf.getLong();
+        if (remain == 0) {
+            buf = this.buffers[++this.currIndex];
+            this.currBuffer = buf;
+            return buf.getLong();
+        }
+        if (remain == 1) {
+            return ((((long) buf.get()) << 56)
+                | (((long) get() & 0xff) << 48)
+                | (((long) get() & 0xff) << 40)
+                | (((long) get() & 0xff) << 32)
+                | (((long) get() & 0xff) << 24)
+                | (((long) get() & 0xff) << 16)
+                | (((long) get() & 0xff) << 8)
+                | (((long) get() & 0xff)));
+        }
+        if (remain == 2) {
+            return ((((long) buf.get()) << 56)
+                | (((long) buf.get() & 0xff) << 48)
+                | (((long) get() & 0xff) << 40)
+                | (((long) get() & 0xff) << 32)
+                | (((long) get() & 0xff) << 24)
+                | (((long) get() & 0xff) << 16)
+                | (((long) get() & 0xff) << 8)
+                | (((long) get() & 0xff)));
+        }
+        if (remain == 3) {
+            return ((((long) buf.get()) << 56)
+                | (((long) buf.get() & 0xff) << 48)
+                | (((long) buf.get() & 0xff) << 40)
+                | (((long) get() & 0xff) << 32)
+                | (((long) get() & 0xff) << 24)
+                | (((long) get() & 0xff) << 16)
+                | (((long) get() & 0xff) << 8)
+                | (((long) get() & 0xff)));
+        }
+        if (remain == 4) {
+            return ((((long) buf.get()) << 56)
+                | (((long) buf.get() & 0xff) << 48)
+                | (((long) buf.get() & 0xff) << 40)
+                | (((long) buf.get() & 0xff) << 32)
+                | (((long) get() & 0xff) << 24)
+                | (((long) get() & 0xff) << 16)
+                | (((long) get() & 0xff) << 8)
+                | (((long) get() & 0xff)));
+        }
+        if (remain == 5) {
+            return ((((long) buf.get()) << 56)
+                | (((long) buf.get() & 0xff) << 48)
+                | (((long) buf.get() & 0xff) << 40)
+                | (((long) buf.get() & 0xff) << 32)
+                | (((long) buf.get() & 0xff) << 24)
+                | (((long) get() & 0xff) << 16)
+                | (((long) get() & 0xff) << 8)
+                | (((long) get() & 0xff)));
+        }
+        if (remain == 6) {
+            return ((((long) buf.get()) << 56)
+                | (((long) buf.get() & 0xff) << 48)
+                | (((long) buf.get() & 0xff) << 40)
+                | (((long) buf.get() & 0xff) << 32)
+                | (((long) buf.get() & 0xff) << 24)
+                | (((long) buf.get() & 0xff) << 16)
+                | (((long) get() & 0xff) << 8)
+                | (((long) get() & 0xff)));
+        }
+        //remain == 7
+        return ((((long) buf.get()) << 56)
+            | (((long) buf.get() & 0xff) << 48)
+            | (((long) buf.get() & 0xff) << 40)
+            | (((long) buf.get() & 0xff) << 32)
+            | (((long) buf.get() & 0xff) << 24)
+            | (((long) buf.get() & 0xff) << 16)
+            | (((long) buf.get() & 0xff) << 8)
+            | (((long) get() & 0xff)));
+    }
+
+    public double getDouble() {
+        return Double.longBitsToDouble(getLong());
+    }
+
+    public ByteBufferReader get(byte[] dst) {
+        return get(dst, 0, dst.length);
+    }
+
+    public ByteBufferReader get(byte[] dst, int offset, int length) {
+        ByteBuffer buf = this.currBuffer;
+        int remain = buf.remaining();
+        if (remain >= length) {
+            buf.get(dst, offset, length);
+            return this;
+        }
+        buf.get(dst, offset, remain);
+        this.currBuffer = this.buffers[++this.currIndex];
+        return get(dst, offset + remain, length - remain);
+    }
+
+    public ByteBufferReader skip(int size) {
+        ByteBuffer buf = this.currBuffer;
+        int remain = buf.remaining();
+        if (remain >= size) {
+            buf.position(buf.position() + size);
+            return this;
+        }
+        buf.position(buf.position() + remain);
+        this.currBuffer = this.buffers[++this.currIndex];
+        return skip(size - remain);
+    }
+}
diff --git a/src/org/redkale/util/ByteBufferWriter.java b/src/org/redkale/util/ByteBufferWriter.java
index 694ab6884..2bb60d637 100644
--- a/src/org/redkale/util/ByteBufferWriter.java
+++ b/src/org/redkale/util/ByteBufferWriter.java
@@ -48,7 +48,7 @@ public class ByteBufferWriter {
     public ByteBuffer[] toBuffers() {
         if (buffers == null) return new ByteBuffer[0];
         for (ByteBuffer buf : this.buffers) {
-            if (buf.position() != 0) buf.flip();
+            buf.flip();
         }
         return this.buffers;
     }
@@ -130,7 +130,6 @@ public class ByteBufferWriter {
 //        System.out.println(Arrays.toString(b4));
 //        System.out.println(Arrays.toString(toBytes(writer.toBuffers())));
 //    }
-
     public ByteBufferWriter putFloat(float value) {
         getLastBuffer(4).putFloat(value);
         position += 4;