[TD-1883]<fix>: fix memory leak when resultSet pointer is null

src/connector/jdbc/deploy-pom.xml

@@ -5,7 +5,7 @@
 
   <groupId>com.taosdata.jdbc</groupId>
   <artifactId>taos-jdbcdriver</artifactId>
-  <version>2.0.6</version>
+  <version>2.0.9</version>
   <packaging>jar</packaging>
 
   <name>JDBCDriver</name>

src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBJNIConnector.java

@@ -122,7 +122,7 @@ public class TSDBJNIConnector {
             pSql = this.executeQueryImp(sql.getBytes(TaosGlobalConfig.getCharset()), this.taos);
         } catch (Exception e) {
             e.printStackTrace();
-            this.freeResultSet(pSql);
+            this.freeResultSetImp(this.taos, pSql);
             throw new SQLException(TSDBConstants.WrapErrMsg("Unsupported encoding"));
         }
 
@@ -131,7 +131,7 @@ public class TSDBJNIConnector {
             affectedRows = -1;
             String msg = this.getErrMsg(pSql);
 
-            this.freeResultSet(pSql);
+            this.freeResultSetImp(this.taos, pSql);
             throw new SQLException(TSDBConstants.WrapErrMsg(msg), "", code);
         }
 
@@ -173,7 +173,7 @@ public class TSDBJNIConnector {
     private native long getResultSetImp(long connection, long pSql);
 
     public boolean isUpdateQuery(long pSql) {
-    	return isUpdateQueryImp(this.taos, pSql) == 1? true:false;
+        return isUpdateQueryImp(this.taos, pSql) == 1 ? true : false;
     }
 
     private native long isUpdateQueryImp(long connection, long pSql);