[Fix-17103][DataxTask] DataxTask getColumnName Cause failure (#17104)

Author: deng-jeffer

dolphinscheduler-task-plugin/dolphinscheduler-task-datax/src/main/java/org/apache/dolphinscheduler/plugin/task/datax/DataxTask.java

@@ -534,7 +534,7 @@ public String[] tryExecuteSqlResolveColumnNames(DbType sourceType, BaseConnectio
             int num = md.getColumnCount();
             columnNames = new String[num];
             for (int i = 1; i <= num; i++) {
-                columnNames[i - 1] = md.getColumnName(i).replace("t.", "");
+                columnNames[i - 1] = md.getColumnLabel(i).replace("t.", "");
             }
         } catch (SQLException | ExecutionException e) {
             log.error(e.getMessage(), e);

dolphinscheduler-task-plugin/dolphinscheduler-task-datax/src/test/java/org/apache/dolphinscheduler/plugin/task/datax/DataxTaskTest.java

@@ -213,7 +213,7 @@ public void testTryExecuteSqlResolveColumnNames() throws Exception {
 
             ResultSetMetaData md = mock(ResultSetMetaData.class);
             when(md.getColumnCount()).thenReturn(1);
-            when(md.getColumnName(eq(1))).thenReturn("something");
+            when(md.getColumnLabel(eq(1))).thenReturn("something");
 
             ResultSet resultSet = mock(ResultSet.class);
             when(resultSet.getMetaData()).thenReturn(md);