update sqlSpeller

src/connector/jdbc/pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.taosdata.jdbc</groupId>
     <artifactId>taos-jdbcdriver</artifactId>
-    <version>2.0.0</version>
+    <version>2.0.8</version>
     <packaging>jar</packaging>
     <name>JDBCDriver</name>
     <url>https://github.com/taosdata/TDengine/tree/master/src/connector/jdbc</url>

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

@@ -587,7 +587,6 @@ public class TSDBDatabaseMetaData implements java.sql.DatabaseMetaData {
     public ResultSet getColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern)
             throws SQLException {
 
-
         /** add by zyyang **********/
         Statement stmt = null;
         if (null != conn && !conn.isClosed()) {

tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/jdbcTaosdemo/utils/SqlSpeller.java

@@ -113,7 +113,7 @@ public class SqlSpeller {
     }
 
     public static String selectLastOneMonth(String dbName, String stbName) {
-        return "select * from " + dbName + "." + stbName + " where ts >= now - 1M";
+        return "select * from " + dbName + "." + stbName + " where ts >= now - 1n";
     }
 
     public static String selectLastOneYear(String dbName, String stbName) {