fix: scan3 bug

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

@@ -527,8 +527,9 @@ public class TSDBDatabaseMetaData implements java.sql.DatabaseMetaData {
 
 	public ResultSet getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types)
 			throws SQLException {
-		if (conn != null && !conn.isClosed()) {
-			Statement stmt = conn.createStatement();
+		Statement stmt = null;
+		if (null != conn && !conn.isClosed()) {
+			stmt = conn.createStatement();
 			if (catalog == null || catalog.length() < 1) {
 				catalog = conn.getCatalog();
 			}

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

@@ -19,7 +19,7 @@ import java.sql.SQLWarning;
 import java.util.List;
 
 public class TSDBJNIConnector {
-    static volatile Boolean isInitialized = false;
+    private static volatile Boolean isInitialized = false;
 
     static {
         System.loadLibrary("taos");

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

@@ -171,8 +171,7 @@ public class TSDBSubscribe {
                 state = 1;
 
                 try {
-                    TSDBResultSet resultSet = consume(subscription);
-                    callBack.invoke(resultSet);
+                    callBack.invoke(consume(subscription));
                 } catch (Exception e) {
                     this.cancel();
                     throw new RuntimeException(e);

src/connector/jdbc/src/test/java/TestAsyncTSDBSubscribe.java

@@ -3,10 +3,11 @@ import org.apache.commons.lang3.StringUtils;
 
 import java.sql.Connection;
 import java.sql.DriverManager;
+import java.sql.SQLException;
 import java.util.Properties;
 
 public class TestAsyncTSDBSubscribe {
-    public static void main(String[] args) {
+    public static void main(String[] args) throws SQLException {
         String usage = "java -cp taos-jdbcdriver-1.0.3_dev-dist.jar com.taosdata.jdbc.TSDBSubscribe -db dbName -topic topicName " +
                 "-tname tableName -h host";
         if (args.length < 2) {
@@ -38,7 +39,6 @@ public class TestAsyncTSDBSubscribe {
         }
 
         Connection connection = null;
-        TSDBSubscribe subscribe = null;
         long subscribId = 0;
         try {
             Class.forName("com.taosdata.jdbc.TSDBDriver");
@@ -46,7 +46,7 @@ public class TestAsyncTSDBSubscribe {
             properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, host);
             connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/" + dbName + "?user=root&password=taosdata", properties);
             String rawSql = "select * from " + tName + ";";
-            subscribe = ((TSDBConnection) connection).createSubscribe();
+            TSDBSubscribe subscribe = ((TSDBConnection) connection).createSubscribe();
             subscribId = subscribe.subscribe(topic, rawSql, false, 1000, new CallBack("first"));
             long subscribId2 = subscribe.subscribe("test", rawSql, false, 1000, new CallBack("second"));
             int a = 0;
@@ -55,6 +55,9 @@ public class TestAsyncTSDBSubscribe {
             System.err.println("cancel subscribe");
         } catch (Exception e) {
             e.printStackTrace();
+            if (null != connection && !connection.isClosed()) {
+                connection.close();
+            }
         }
     }
 

src/connector/jdbc/src/test/java/TestPreparedStatement.java

@@ -6,19 +6,20 @@ import java.util.Properties;
 
 public class TestPreparedStatement {
 
-    public static void main(String[] args) {
+    public static void main(String[] args) throws SQLException {
+        Connection connection = null;
         try {
             Class.forName("com.taosdata.jdbc.TSDBDriver");
             Properties properties = new Properties();
             properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, "localhost");
-            Connection connection = DriverManager.getConnection("jdbc:TAOS://localhost:0/?user=root&password=taosdata", properties);
+            connection = DriverManager.getConnection("jdbc:TAOS://localhost:0/?user=root&password=taosdata", properties);
             String rawSql = "select * from test.log0601";
 //            String[] params = new String[]{"ts", "c1"};
             PreparedStatement pstmt = (TSDBPreparedStatement) connection.prepareStatement(rawSql);
             ResultSet resSet = pstmt.executeQuery();
             while(resSet.next()) {
                 for (int i = 1; i <= resSet.getMetaData().getColumnCount(); i++) {
-                    System.out.printf("%d: %s\n", i, resSet.getString(i));
+                    System.out.printf("%d: %s \n", i, resSet.getString(i));
                 }
             }
             resSet.close();
@@ -27,7 +28,9 @@ public class TestPreparedStatement {
 
         } catch (Exception e) {
             e.printStackTrace();
-
+            if (null != connection) {
+                connection.close();
+            }
         }
     }
 }

src/connector/jdbc/src/test/java/TestTSDBDatabaseMetaData.java

 import com.taosdata.jdbc.TSDBDriver;
 
-import java.sql.Connection;
-import java.sql.DatabaseMetaData;
-import java.sql.DriverManager;
-import java.sql.ResultSet;
+import java.sql.*;
 import java.util.Properties;
 
 public class TestTSDBDatabaseMetaData {
 
-    public static void main(String[] args) {
+    public static void main(String[] args) throws SQLException {
+        Connection connection = null;
+        DatabaseMetaData dbMetaData = null;
+        ResultSet resSet = null;
         try {
             Class.forName("com.taosdata.jdbc.TSDBDriver");
             Properties properties = new Properties();
-            properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, "192.168.1.114");
-            Connection connection = DriverManager.getConnection("jdbc:TAOS://192.168.1.114:0/?user=root&password=taosdata", properties);
-            DatabaseMetaData dbMetaData = connection.getMetaData();
-            ResultSet resSet = dbMetaData.getCatalogs();
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, "localhost");
+            connection = DriverManager.getConnection("jdbc:TAOS://localhost:0/?user=root&password=taosdata", properties);
+            dbMetaData = connection.getMetaData();
+            resSet = dbMetaData.getCatalogs();
             while(resSet.next()) {
                 for (int i = 1; i <= resSet.getMetaData().getColumnCount(); i++) {
                     System.out.printf("dbMetaData.getCatalogs(%d) = %s\n", i, resSet.getString(i));
                 }
             }
+            resSet.close();
 
         } catch (Exception e) {
             e.printStackTrace();
+            if (null != connection) {
+                connection.close();
+            }
         }
     }
 }

src/connector/jdbc/src/test/java/TestTSDBSubscribe.java

@@ -53,9 +53,10 @@ public class TestTSDBSubscribe {
             subscribe = ((TSDBConnection) connection).createSubscribe();
             subscribId = subscribe.subscribe(topic, rawSql, false, 1000);
             int a = 0;
+            TSDBResultSet resSet = null;
             while (true) {
                 Thread.sleep(900);
-                TSDBResultSet resSet = subscribe.consume(subscribId);
+                resSet = subscribe.consume(subscribId);
 
                 while (resSet.next()) {
                     for (int i = 1; i <= resSet.getMetaData().getColumnCount(); i++) {

src/connector/jdbc/src/test/java/com/taosdata/jdbc/AsyncSubscribeTest.java

@@ -37,7 +37,7 @@ public class AsyncSubscribeTest {
         statement.executeUpdate("create database if not exists " + dbName);
         statement.executeUpdate("create table if not exists " + dbName + "." + tName + " (ts timestamp, k int, v int)");
         long ts = System.currentTimeMillis();
-        for (int i = 0; i < 5; i++) {
+        for (int i = 0; i < 2; i++) {
             ts += i;
             statement.executeUpdate("insert into \" + dbName + \".\" + tName + \" values (" + ts + ", " + (100 + i) + ", " + i + ")");
         }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/DatabaseMetaDataTest.java

 package com.taosdata.jdbc;
 
+import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -41,6 +42,7 @@ public class DatabaseMetaDataTest {
                 System.out.printf("%d: %s\n", i, resultSet.getString(i));
             }
         }
+        resultSet.close();
         databaseMetaData.isWrapperFor(null);
         databaseMetaData.allProceduresAreCallable();
         databaseMetaData.allTablesAreSelectable();
@@ -228,4 +230,11 @@ public class DatabaseMetaDataTest {
         databaseMetaData.generatedKeyAlwaysReturned();
 
     }
+
+    @AfterClass
+    public static void close() throws SQLException {
+        statement.executeUpdate("drop database " + dbName);
+        statement.close();
+        connection.close();
+    }
 }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/PreparedStatementTest.java

@@ -55,7 +55,7 @@ public class PreparedStatementTest {
 
     @Test
     public void testPreparedStatement() throws SQLException {
-        long ts = System.currentTimeMillis();
+        long ts = System.currentTimeMillis() + 20000;
         PreparedStatement saveStatement = connection
                 .prepareStatement("insert into " + dbName + "." + tName + " values (" + ts + ", 1)");
 
@@ -70,7 +70,7 @@ public class PreparedStatementTest {
         TSDBPreparedStatement saveStatement = (TSDBPreparedStatement) connection
                 .prepareStatement("insert into  " + dbName + "." + tName + " values (?, ?)");
 
-        saveStatement.setObject(1, ts + 100);
+        saveStatement.setObject(1, ts + 10000);
         saveStatement.setObject(2, 3);
         int rows = saveStatement.executeUpdate();
         assertEquals(1, rows);

src/connector/jdbc/src/test/java/com/taosdata/jdbc/SubscribeTest.java

@@ -20,7 +20,7 @@ public class SubscribeTest {
     String host = "localhost";
     String topic = "test";
 
-//    @Before
+    @Before
     public void createDatabase() throws SQLException {
         try {
             Class.forName("com.taosdata.jdbc.TSDBDriver");
@@ -36,13 +36,13 @@ public class SubscribeTest {
         statement.executeUpdate("create database if not exists " + dbName);
         statement.executeUpdate("create table if not exists " + dbName + "." + tName + " (ts timestamp, k int, v int)");
         long ts = System.currentTimeMillis();
-        for (int i = 0; i < 5; i++) {
+        for (int i = 0; i < 2; i++) {
             ts += i;
             statement.executeUpdate("insert into \" + dbName + \".\" + tName + \" values (" + ts + ", " + (100 + i) + ", " + i + ")");
         }
     }
 
-//    @Test
+    @Test
     public void subscribe() throws Exception {
         TSDBSubscribe subscribe = null;
         long subscribId = 0;
@@ -68,7 +68,7 @@ public class SubscribeTest {
                 }
                 resSet.close();
                 a++;
-                if (a >= 3) {
+                if (a >= 2) {
                     break;
                 }
             }
@@ -81,7 +81,7 @@ public class SubscribeTest {
         }
     }
 
-//    @After
+    @After
     public void close() throws Exception {
         statement.executeQuery("drop database " + dbName);
         statement.close();