rename delete to deleteData in session

example/session/src/main/java/org/apache/iotdb/SessionExample.java

@@ -67,7 +67,7 @@ public class SessionExample {
   private static void delete() throws IoTDBSessionException {
     String path = "root.sg1.d1.s1";
     long deleteTime = 99;
-    session.delete(path, deleteTime);
+    session.deleteData(path, deleteTime);
   }
 
   private static void insertRowBatch() throws IoTDBSessionException {

session/src/main/java/org/apache/iotdb/session/Session.java

@@ -176,7 +176,12 @@ public class Session {
     }
   }
 
-  public synchronized TSStatus delete(String path, long time) throws IoTDBSessionException {
+  /**
+   * @param path data of whose time series to delete
+   * @param time data with time stamp less than or equal to time will be deleted
+   * @return result statue
+   */
+  public synchronized TSStatus deleteData(String path, long time) throws IoTDBSessionException {
     TSDeleteReq request = new TSDeleteReq();
     request.setPath(path);
     request.setTimestamp(time);

session/src/test/java/org/apache/iotdb/session/IoTDBSessionIT.java

@@ -128,9 +128,9 @@ public class IoTDBSessionIT {
     String path3 = "root.sg1.d1.s3";
     long deleteTime = 99;
 
-    session.delete(path1, deleteTime);
-    session.delete(path2, deleteTime);
-    session.delete(path3, deleteTime);
+    session.deleteData(path1, deleteTime);
+    session.deleteData(path2, deleteTime);
+    session.deleteData(path3, deleteTime);
   }
 
   public void queryTest() throws ClassNotFoundException, SQLException {

session/src/test/java/org/apache/iotdb/session/utils/EnvironmentUtils.java

@@ -91,7 +91,7 @@ public class EnvironmentUtils {
     }
     // close metadata
     MManager.getInstance().clear();
-    // delete all directory
+    // deleteData all directory
     cleanAllDir();
 
     config.setMaxMemtableNumber(oldMaxMemTableNumber);
@@ -101,22 +101,22 @@ public class EnvironmentUtils {
   }
 
   public static void cleanAllDir() throws IOException {
-    // delete sequential files
+    // deleteData sequential files
     for (String path : directoryManager.getAllSequenceFileFolders()) {
       cleanDir(path);
     }
-    // delete unsequence files
+    // deleteData unsequence files
     for (String path : directoryManager.getAllUnSequenceFileFolders()) {
       cleanDir(path);
     }
-    // delete system info
+    // deleteData system info
     cleanDir(config.getSystemDir());
-    // delete wal
+    // deleteData wal
     cleanDir(config.getWalFolder());
-    // delete index
+    // deleteData index
     cleanDir(config.getIndexFileDir());
     cleanDir(config.getBaseDir());
-    // delete data files
+    // deleteData data files
     for (String dataDir : config.getDataDirs()) {
       cleanDir(dataDir);
     }