如何在Android中记录查询SQLite查询？
我正在使用以下代码。有什么方法可以为我们查看或记录它吗？该查询何时运行。例如，我想记录所有INSERT，UPDATE，DELETE查询，以将其保存到另一个表中。
我找到了许多其他答案，但仍然无法解决这个问题。
这是例如在INSERT上获取日志查询的代码：
// --- add addProductServiceCategory ---//
public long addProductServiceCategory(ProductServiceCategory productServiceCategory){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(ProductServiceCategoryColumn.Entry.ID, productServiceCategory.id);
values.put(ProductServiceCategoryColumn.Entry.PROJECT_ID, productServiceCategory.project_id);
values.put(ProductServiceCategoryColumn.Entry.TITLE, productServiceCategory.title);
values.put(ProductServiceCategoryColumn.Entry.CREATE_AT, productServiceCategory.created_at);
values.put(ProductServiceCategoryColumn.Entry.UPDATE_AT, productServiceCategory.updated_at);
long todo_id = db.insert(ProductServiceCategoryColumn.Entry.TABLE_PRODUCT_SERVICE_CATEGORY, null, values);
return todo_id;
}
示例： 我有一个表名称tbl_log_queries。在此表中，我想存储记录的查询。
2 个答案:
答案 0 :(得分：1)
在SQLiteDatabase周围编写一个包装器类，该类在运行查询之前记录查询。用它代替直接使用SQLiteDatabase。
答案 1 :(得分：0)
如果您的最终目标是在插入/更新/删除行时将行的插入到另一个表中，那么TRIGGER可能就是您的答案。
请考虑以下内容：-
DROP TABLE IF EXISTS product_service_category;
DROP TABLE IF EXISTS product_action_log;
DROP TRIGGER IF EXISTS product_service_category_inserted;
DROP TRIGGER IF EXISTS product_service_category_updated;
DROP TRIGGER IF EXISTS product_service_category_deleted;
-- The Main/Original Table
CREATE TABLE IF NOT EXISTS product_service_category
(
_id INTEGER PRIMARY KEY,
product_id INTEGER,
title TEXT,
created_at TEXT DEFAULT CURRENT_TIMESTAMP,
updated_at TEXT DEFAULT 0
)
;
-- The Logging table (aka Your Other Table)
CREATE TABLE product_action_log
(
_id INTEGER PRIMARY KEY,
product_service_category_reference INTEGER,
timestamp TEXT DEFAULT CURRENT_TIMESTAMP,
action_taken TEXT
)
;
-- Trigger for logging INSERTS
CREATE TRIGGER IF NOT EXISTS product_service_category_inserted AFTER INSERT ON product_service_category
BEGIN
INSERT INTO product_action_log (product_service_category_reference, action_taken) VALUES(new._id,'INSERTED');
END;
-- Trigger for logging UPDATES
CREATE TRIGGER IF NOT EXISTS product_service_category_updated AFTER UPDATE ON product_service_category
BEGIN
INSERT INTO product_action_log (product_service_category_reference, action_taken) VALUES(new._id,'UPDATED');
END;
-- Trigger for loggin Deletes
CREATE TRIGGER IF NOT EXISTS product_service_category_deleted AFTER DELETE ON product_service_category
BEGIN INSERT INTO product_action_log (product_service_category_reference, action_taken) VALUES(old._id,'DELETED');
END;
-- Add some testing data (4 rows into the main table)
INSERT INTO product_service_category (product_id, title)
VALUES
(1,'Title 1'),(2,'Title 2'),(3,'Title 3'),(4,'and so on')
;
-- Show what the log table looks like (reference data from the main table )
SELECT * FROM product_action_log
JOIN product_service_category ON product_service_category_reference = product_service_category._ID
;
-- Update some data
UPDATE product_service_category SET title = 'changed', updated_at = datetime('now') WHERE _id = 2;
UPDATE product_service_category SET title = 'changed', updated_at = datetime('now') WHERE _id = 4;
-- Show what the log looks like after the updates
SELECT * FROM product_action_log
JOIN product_service_category ON product_service_category_reference = product_service_category._ID;
-- delete a row from the main table
DELETE FROM product_service_category WHERE _id = 1;
-- Show what the data in the log looks like now (note LEFT JOIN)
SELECT * FROM product_action_log
LEFT JOIN product_service_category ON product_service_category_reference = product_service_category._ID;
第一个查询结果为：-
第二次查询经过一些更新后，结果为：-
删除后的第三个查询结果为：-
- 请注意，LEFT JOIN包含引用已删除的product_service_category的行（由于已删除，因此对其的引用为null）。
唯一需要的额外编码是创建TRIGGERS，然后创建任何处理已记录数据的查询（无论如何都在卡上）。
适用于Android
可以按以下方式实现触发器的使用（考虑要记录的数据，尽管不是使用SQL，而是考虑可以用来构造SQL的数据）。
首先基本等同于 productServiceCategory.java
public class productServiceCategory {
public long id;
public long project_id;
public String title;
public String created_at;
public String updated_at;
public productServiceCategory(long id, long project_id, String title, String created_at, String updated_at) {
this.id = id;
this.project_id = project_id;
this.title = title;
this.created_at = created_at;
this.updated_at = updated_at;
}
}
第二个扩展的等效产品 ProductServiceCategoryColumn.java ，其中包含触发器和日志表的大部分更改，该表具有用于旧值和新值的列：-
public class ProductServiceCategoryColumn {
public class Entry {
public static final String TABLE_PRODUCT_SERVICE_CATEGORY = "product_service_category";
public static final String ID = BaseColumns._ID;
public static final String PROJECT_ID = "project_id";
public static final String TITLE = "title";
public static final String CREATE_AT = "create_at";
public static final String UPDATE_AT = "update_at";
public static final String CREATETABLE = "CREATE TABLE IF NOT EXISTS " + TABLE_PRODUCT_SERVICE_CATEGORY +
"(" +
ID + " INTEGER PRIMARY KEY," +
PROJECT_ID + " INTEGER," +
TITLE + " TEXT," +
CREATE_AT + " TEXT DEFAULT CURRENT_TIMESTAMP," +
UPDATE_AT + " TEXT DEFAULT NULL" +
")";
}
public class Log {
public static final String TABLE_LOG_QUERIES = "tbl_log";
public static final String ID = BaseColumns._ID;
public static final String LOGGED_QUERIES = "logged_queries";
public static final String LOGGED_DATE = "logged_date";
public static final String LOGGED_ACTION = "logged_action";
public static final String OLD_PROJECT_ID = "old_" + Entry.PROJECT_ID;
public static final String NEW_PROJECT_ID = "new_" + Entry.PROJECT_ID;
public static final String OLD_TITLE = "old_" + Entry.TITLE;
public static final String NEW_TITLE = "new_" + Entry.TITLE;
public static final String OLD_CREATE_AT = "old_" + Entry.CREATE_AT;
public static final String NEW_CREATE_AT = "new_" + Entry.CREATE_AT;
public static final String OLD_UPDATE_AT = "old_" + Entry.UPDATE_AT;
public static final String NEW_UPDATE_AT = "new_" + Entry.UPDATE_AT;
public static final String CREATETABLE = "CREATE TABLE IF NOT EXISTS " + TABLE_LOG_QUERIES +
"(" +
ID + " INTEGER PRIMARY KEY," +
LOGGED_QUERIES + " TEXT, " +
LOGGED_DATE + " TEXT, " +
LOGGED_ACTION + " TEXT," +
OLD_PROJECT_ID + " INTEGER," +
NEW_PROJECT_ID + " INTEGER," +
OLD_TITLE + " TEXT," +
NEW_TITLE + " TEXT," +
OLD_CREATE_AT + " TEXT," +
NEW_CREATE_AT + " TEXT, " +
OLD_UPDATE_AT + " TEXT," +
NEW_UPDATE_AT + " TEXT" +
")";
}
public class EventInsertTrigger {
public static final String EVENT_INSERT_TRIGGER = "eventinserttrigger";
public static final String CREATETRIGGER = "CREATE TRIGGER IF NOT EXISTS " + EVENT_INSERT_TRIGGER +
" AFTER INSERT ON " + Entry.TABLE_PRODUCT_SERVICE_CATEGORY +
" BEGIN " +
" INSERT INTO " + Log.TABLE_LOG_QUERIES + " (" +
Log.LOGGED_DATE + "," +
Log.LOGGED_ACTION + "," +
Log.NEW_PROJECT_ID + "," +
Log.NEW_TITLE + "," +
Log.NEW_CREATE_AT + "," +
Log.LOGGED_QUERIES +
") VALUES (" +
"datetime('now')," +
"'INSERT'," +
"new." + Entry.PROJECT_ID + "," +
"new." + Entry.TITLE + "," +
"new." + Entry.CREATE_AT + "," +
"''" +
");" +
" END ";
}
public class EventUpdateTrigger {
public static final String EVENT_UPDATE_TRIGGER = "eventupdatetrigger";
public static final String CREATETRIGGER = "CREATE TRIGGER IF NOT EXISTS " + EVENT_UPDATE_TRIGGER +
" AFTER UPDATE ON " + Entry.TABLE_PRODUCT_SERVICE_CATEGORY +
" BEGIN " +
" INSERT INTO " + Log.TABLE_LOG_QUERIES + " (" +
Log.LOGGED_DATE + "," +
Log.LOGGED_ACTION + "," +
Log.OLD_PROJECT_ID + "," +
Log.NEW_PROJECT_ID + "," +
Log.OLD_TITLE + "," +
Log.NEW_TITLE + "," +
Log.OLD_CREATE_AT + "," +
Log.NEW_CREATE_AT + "," +
Log.OLD_UPDATE_AT + "," +
Log.NEW_UPDATE_AT + "," +
Log.LOGGED_QUERIES +
") VALUES (" +
"datetime('now')," +
"'UPDATE'," +
"old." + Entry.PROJECT_ID + "," +
"new." + Entry.PROJECT_ID + "," +
"old." + Entry.TITLE + "," +
"new." + Entry.TITLE + "," +
"old." + Entry.CREATE_AT + "," +
"new." + Entry.CREATE_AT + "," +
"old." + Entry.UPDATE_AT + "," +
"new." + Entry.UPDATE_AT + "," +
"''" +
");" +
" END ";
}
public class EventDeleteTrigger {
public static final String EVENT_DELETE_TRIGGER = "eventdeletetrigger";
public static final String CREATETRIGGER = "CREATE TRIGGER IF NOT EXISTS " + EVENT_DELETE_TRIGGER +
" AFTER DELETE ON " + Entry.TABLE_PRODUCT_SERVICE_CATEGORY +
" BEGIN " +
" INSERT INTO " + Log.TABLE_LOG_QUERIES + " (" +
Log.LOGGED_DATE + "," +
Log.LOGGED_ACTION + "," +
Log.OLD_PROJECT_ID + "," +
Log.OLD_TITLE + "," +
Log.OLD_CREATE_AT + "," +
Log.OLD_UPDATE_AT + "," +
Log.LOGGED_QUERIES +
") VALUES (" +
"datetime('now')," +
"'DELETE'," +
"old." + Entry.PROJECT_ID + "," +
"old." + Entry.TITLE + "," +
"old." + Entry.CREATE_AT + "," +
"old." + Entry.UPDATE_AT + "," +
"''" +
");" +
" END ";
}
}
第三个数据库助手 DBHelper.java
public class DBHelper extends SQLiteOpenHelper {
public static final String DBNAME = "events";
public static final int DBVERSION = 1;
SQLiteDatabase mDB;
public DBHelper(@Nullable Context context) {
super(context, DBNAME, null, DBVERSION);
mDB = this.getWritableDatabase();
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL(ProductServiceCategoryColumn.Entry.CREATETABLE);
db.execSQL(ProductServiceCategoryColumn.Log.CREATETABLE);
db.execSQL(ProductServiceCategoryColumn.EventInsertTrigger.CREATETRIGGER);
db.execSQL(ProductServiceCategoryColumn.EventUpdateTrigger.CREATETRIGGER);
db.execSQL(ProductServiceCategoryColumn.EventDeleteTrigger.CREATETRIGGER);
}
@Override
public void onUpgrade(SQLiteDatabase db, int i, int i1) {
}
// --- add addProductServiceCategory ---//
public long addProductServiceCategory(productServiceCategory productServiceCategory){
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(ProductServiceCategoryColumn.Entry.ID, productServiceCategory.id);
values.put(ProductServiceCategoryColumn.Entry.PROJECT_ID, productServiceCategory.project_id);
values.put(ProductServiceCategoryColumn.Entry.TITLE, productServiceCategory.title);
values.put(ProductServiceCategoryColumn.Entry.CREATE_AT, productServiceCategory.created_at);
values.put(ProductServiceCategoryColumn.Entry.UPDATE_AT, productServiceCategory.updated_at);
long todo_id = db.insert(ProductServiceCategoryColumn.Entry.TABLE_PRODUCT_SERVICE_CATEGORY, null, values);
return todo_id;
}
public int updateProductServiceCategory(long id, productServiceCategory psc) {
SQLiteDatabase db = this.getWritableDatabase();
String whereclause = ProductServiceCategoryColumn.Entry.ID + "=?";
String[] whereargs = new String[]{String.valueOf(id)};
ContentValues cv = new ContentValues();
cv.put(ProductServiceCategoryColumn.Entry.PROJECT_ID,psc.project_id);
cv.put(ProductServiceCategoryColumn.Entry.TITLE,psc.title);
cv.put(ProductServiceCategoryColumn.Entry.CREATE_AT,psc.created_at);
cv.put(ProductServiceCategoryColumn.Entry.UPDATE_AT,psc.updated_at);
return db.update(ProductServiceCategoryColumn.Entry.TABLE_PRODUCT_SERVICE_CATEGORY,cv,whereclause,whereargs);
}
public int deleteProductServiceCategory(long id) {
SQLiteDatabase db = this.getWritableDatabase();
String whereclause = ProductServiceCategoryColumn.Entry.ID + "=?";
String[] whereargs = new String[]{String.valueOf(id)};
return db.delete(ProductServiceCategoryColumn.Entry.TABLE_PRODUCT_SERVICE_CATEGORY,whereclause,whereargs);
}
}
最后一次从活动的onCreate调用插入，更新和删除（旨在运行一次）：-
public class MainActivity extends AppCompatActivity {
//AdminSQLiteOpenHelper mASQLiteHlpr;
//SQLCon mSQLcon;
DBHelper mDBHlpr;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDBHlpr = new DBHelper(this);
mDBHlpr.addProductServiceCategory(new productServiceCategory(1,1,"Title1","2018-01-01 10:30", ""));
mDBHlpr.addProductServiceCategory(new productServiceCategory(2,2,"hello title","2018-02-28",""));
mDBHlpr.addProductServiceCategory(new productServiceCategory(3,2,"Something else","2018-03-21",""));
mDBHlpr.addProductServiceCategory(new productServiceCategory(4,1,"A N Other","2017-11-10",""));
mDBHlpr.updateProductServiceCategory(1,new productServiceCategory(1,2,"Changed Title","2018-01-01 10:30","2018-10-16 19:52"));
mDBHlpr.deleteProductServiceCategory(3);
Cursor csr = mDBHlpr.getWritableDatabase().query(ProductServiceCategoryColumn.Log.TABLE_LOG_QUERIES,null,null,null,null,null,null);
DatabaseUtils.dumpCursor(csr);
csr.close();
}
}
运行上面的结果将导致光标转储日志表中所有行的摘要：-
10-26 09:41:13.401 3148-3148/axtest.axtest I/System.out: >>>>> Dumping cursor android.database.sqlite.SQLiteCursor@534ad948
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: 0 {
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: _id=1
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_queries=
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_date=2018-10-26 09:41:13
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_action=INSERT
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_project_id=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_project_id=1
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_title=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_title=Title1
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_create_at=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_create_at=2018-01-01 10:30
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_update_at=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_update_at=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: }
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: 1 {
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: _id=2
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_queries=
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_date=2018-10-26 09:41:13
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_action=INSERT
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_project_id=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_project_id=2
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_title=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_title=hello title
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_create_at=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_create_at=2018-02-28
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_update_at=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_update_at=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: }
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: 2 {
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: _id=3
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_queries=
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_date=2018-10-26 09:41:13
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: logged_action=INSERT
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_project_id=null
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: new_project_id=2
10-26 09:41:13.405 3148-3148/axtest.axtest I/System.out: old_title=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_title=Something else
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_create_at=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_create_at=2018-03-21
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_update_at=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_update_at=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: }
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: 3 {
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: _id=4
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_queries=
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_date=2018-10-26 09:41:13
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_action=INSERT
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_project_id=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_project_id=1
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_title=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_title=A N Other
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_create_at=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_create_at=2017-11-10
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_update_at=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_update_at=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: }
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: 4 {
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: _id=5
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_queries=
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_date=2018-10-26 09:41:13
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_action=UPDATE
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_project_id=1
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_project_id=2
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_title=Title1
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_title=Changed Title
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_create_at=2018-01-01 10:30
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_create_at=2018-01-01 10:30
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_update_at=
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_update_at=2018-10-16 19:52
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: }
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: 5 {
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: _id=6
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_queries=
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_date=2018-10-26 09:41:13
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: logged_action=DELETE
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_project_id=2
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_project_id=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_title=Something else
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_title=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_create_at=2018-03-21
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_create_at=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: old_update_at=
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: new_update_at=null
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: }
10-26 09:41:13.409 3148-3148/axtest.axtest I/System.out: <<<<<
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