我尝试使用sqoop import中的append选项进行增量加载。它附加在HDFS文件中，当我查询表时，值为NULL。
命令：
String newWordScene(Stage primaryStage)
{
Text prompText = new Text("Word to guess: ");
TextField wordToGuess = new TextField();
Button submitButton = new Button();
GridPane grid = new GridPane();
grid.add(prompText, 0, 0);
grid.add(wordToGuess, 0, 1);
grid.add(submitButton, 0, 2);
Scene newWordScene = new Scene(grid, 500, 500);
primaryStage.setScene(newWordScene);
primaryStage.show();
submitButton.setOnAction(e->
{
if(verify(wordToGuess.getText()))
return wordToGuess.getText();
});
}
}
Hive结果：
sqoop import --connect "jdbc:mysql://quickstart.cloudera:3306/retail_db" --username=retail_dba --password=cloudera --table departments --append --target-dir /user/hive/warehouse/departments --where "department_id>7" --outdir java_files