diff --git a/src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java b/src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java
index 37a98bdfcc..d09dcae74b 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MySqlExceptionSorter.java
@@ -24,12 +24,32 @@ public class MySqlExceptionSorter implements ExceptionSorter {
 
     @Override
     public boolean isExceptionFatal(SQLException e) {
+        int loopCount = 20;
+
+        Throwable cause = e;
+        while (cause != null) {
+            if (cause instanceof SQLException) {
+                SQLException sqlException = (SQLException) cause;
+
+                if (isExceptionFatal0(sqlException)) {
+                    return true;
+                }
+            }
+            cause = cause.getCause();
+            if (--loopCount < 0) {
+                break;
+            }
+        }
+        return false;
+    }
+
+    private boolean isExceptionFatal0(SQLException e) {
         String sqlState = e.getSQLState();
-        if (sqlState != null && sqlState.startsWith("08")) { // per Mark Matthews at MySQL
+        final int errorCode = Math.abs(e.getErrorCode());
+
+        if (sqlState != null && sqlState.startsWith("08")) {
             return true;
         }
-
-        final int errorCode = e.getErrorCode();
         switch (errorCode) {
         // Communications Errors
             case 1040: // ER_CON_COUNT_ERROR
@@ -39,35 +59,32 @@ public class MySqlExceptionSorter implements ExceptionSorter {
             case 1081: // ER_IPSOCK_ERROR
             case 1129: // ER_HOST_IS_BLOCKED
             case 1130: // ER_HOST_NOT_PRIVILEGED
-
                 // Authentication Errors
             case 1045: // ER_ACCESS_DENIED_ERROR
-
                 // Resource errors
             case 1004: // ER_CANT_CREATE_FILE
             case 1005: // ER_CANT_CREATE_TABLE
             case 1015: // ER_CANT_LOCK
             case 1021: // ER_DISK_FULL
             case 1041: // ER_OUT_OF_RESOURCES
-
                 // Out-of-memory errors
             case 1037: // ER_OUTOFMEMORY
             case 1038: // ER_OUT_OF_SORTMEMORY
                 return true;
-
-            default:
-                break;
-        }
-        
-        if (errorCode >= -10000 && errorCode <= -9000) {
-            return true;
         }
 
+        if (StringUtils.isNotBlank(e.getMessage())) {
+            final String errorText = e.getMessage().toUpperCase();
+
+            if (errorCode == 0
+                && (errorText.indexOf("COMMUNICATIONS LINK FAILURE") > -1 || errorText
+                    .indexOf("COULD NOT CREATE CONNECTION") > -1)
+                || errorText.indexOf("NO DATASOURCE") > -1
+                || errorText.indexOf("NO ALIVE DATASOURCE") > -1) {
+                return true;
+            }
+        }
         return false;
     }
-    
-    public void configFromProperties(Properties properties) {
-        
-    }
 
 }
diff --git a/src/main/java/com/alibaba/druid/sql/SQLUtils.java b/src/main/java/com/alibaba/druid/sql/SQLUtils.java
index fd6c854a76..ba01460e62 100644
--- a/src/main/java/com/alibaba/druid/sql/SQLUtils.java
+++ b/src/main/java/com/alibaba/druid/sql/SQLUtils.java
@@ -39,6 +39,9 @@ import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
 import com.alibaba.druid.support.logging.Log;
 import com.alibaba.druid.support.logging.LogFactory;
 import com.alibaba.druid.util.JdbcUtils;
+import com.alibaba.druid.util.JdbcConstants;
+import com.alibaba.druid.util.StringUtils;
+
 
 public class SQLUtils {
 
@@ -240,4 +243,37 @@ public class SQLUtils {
         }
         return stmtList;
     }
+	
+	 /**
+     * @author owenludong.lud
+     * @param  columnName
+     * @param  tableAlias 
+     * @param  pattern if pattern is null,it will be set {%Y-%m-%d %H:%i:%s} as mysql default value and set {yyyy-mm-dd hh24:mi:ss} as oracle default value
+     * @param  dbType  {@link JdbcConstants} if dbType is null ,it will be set the mysql as a default value
+     */
+    public static String buildToDate(String columnName,String tableAlias,String pattern,String dbType){    	
+     	StringBuilder sql = new StringBuilder();    	
+     	if(StringUtils.isEmpty(columnName))
+     		return "";  			
+     	if(StringUtils.isEmpty(dbType))    dbType = JdbcConstants.MYSQL;   
+     	String formatMethod = "";
+     	if(JdbcConstants.MYSQL.equalsIgnoreCase(dbType)){
+     		formatMethod = "STR_TO_DATE";
+     		if(StringUtils.isEmpty(pattern)) pattern = "%Y-%m-%d %H:%i:%s";
+     	}else if(JdbcConstants.ORACLE.equalsIgnoreCase(dbType)){
+     		formatMethod = "TO_DATE";
+     		if(StringUtils.isEmpty(pattern)) pattern = "yyyy-mm-dd hh24:mi:ss";
+     	}else{     		
+     		return "";
+     		//expand date's handle method for other database 
+     	}
+     	sql.append(formatMethod).append("(");        	
+ 		if(!StringUtils.isEmpty(tableAlias))
+ 			sql.append(tableAlias).append("."); 
+ 		sql.append(columnName).append(",");
+ 		sql.append("'");
+ 		sql.append(pattern);
+ 		sql.append("')");     	   	
+     	return sql.toString();
+     }
 }
diff --git a/src/test/java/com/alibaba/druid/bvt/utils/JdbcUtilsTest.java b/src/test/java/com/alibaba/druid/bvt/utils/JdbcUtilsTest.java
index 739da78143..eb8661b71c 100644
--- a/src/test/java/com/alibaba/druid/bvt/utils/JdbcUtilsTest.java
+++ b/src/test/java/com/alibaba/druid/bvt/utils/JdbcUtilsTest.java
@@ -78,5 +78,5 @@ public class JdbcUtilsTest extends TestCase {
             List<Map<String, Object>> list = JdbcUtils.executeQuery(dataSource, "select * from user");
             Assert.assertEquals(0, list.size());
         }
-    }
+    }   
 }