[TS-336]<fix>:don't need return -1,when update sql done

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

@@ -84,8 +84,7 @@ public class TSDBStatement extends AbstractStatement {
         long pSql = this.connection.getConnector().executeQuery(sql);
         // if pSql is create/insert/update/delete/alter SQL
         if (this.connection.getConnector().isUpdateQuery(pSql)) {
-            int rows = this.connection.getConnector().getAffectedRows(pSql);
-            this.affectedRows = rows == 0 ? -1 : this.connection.getConnector().getAffectedRows(pSql);
+            this.affectedRows = this.connection.getConnector().getAffectedRows(pSql);
             this.connection.getConnector().freeResultSet(pSql);
             return false;
         }

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulStatement.java

@@ -140,8 +140,7 @@ public class RestfulStatement extends AbstractStatement {
             throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
         JSONArray data = jsonObject.getJSONArray("data");
         if (data != null) {
-            int rows = data.getJSONArray(0).getInteger(0);
-            return rows == 0 ? -1 : data.getJSONArray(0).getInteger(0);
+            return data.getJSONArray(0).getInteger(0);
         }
         throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
     }