Develop Reference

Android-SQLiteConstraintException error code 19: constraint failed

I know you have many questions on here about this error, but I cannot understand why all the fields appears to be filled correctly on Logcat, but even so the failure occurs.
Here is the creation of the table:
public void onCreate(SQLiteDatabase db) {
String ddl = "CREATE TABLE Politician (id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE , idpolitician INTEGER NOT NULL, name TEXT NOT NULL, picture TEXT , position TEXT NOT NULL, country TEXT NOT NULL, state TEXT NOT NULL, city TEXT NOT NULL);";
db.execSQL(ddl);
}
Here is where I tried to save.
public void savePolitician(Politician politician) {
ContentValues values = new ContentValues();
values.put("idpolitician", politician.getId());
values.put("name", politician.getName());
values.put("picture", politician.getPictureFilename());
values.put("position", politician.getPosition());
values.put("country", politician.getCountry());
values.put("state", politician.getState());
values.put("city", politician.getCity());
mDatabase.insert("Politician", null, values);
}
And here is the LogCat:
01-08 04:03:31.149 32633-32633/? E/Database﹕ [SQLiteDatabase.java:1428:insert()] Error inserting
state=SP position=governador picture=example idpolitician=1 city=Sao Paulo country=Brasil name=Alckmin
android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed
at android.database.sqlite.SQLiteStatement.native_execute(Native Method)
at android.database.sqlite.SQLiteStatement.execute(SQLiteStatement.java:61)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1582)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1426)
at com.politify.dao.DbManegament.savePolitician(DbManegament.java:44)
As you can see all the fields are filled. Anyone can help and tell what i`m doing wrong

try remove AUTOINCREMENT UNIQUE inyour create table script

This is your mistake id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE
When you are defining any column as Primary Key then you do not need to specify it as UNIQUE. Primary Key is by default UNIQUE.

Create Android SQL Database with a few pre populate data

I've gone through many examples here, but all seem complicated and most of them are for large data. I'm new to both Android and also SQL. What I want to do is just pre-populate my SQL database with some data.
#Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE restaurants (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, address TEXT, type TEXT, notes TEXT, feed TEXT, lat REAL, lon REAL);");
ContentValues cv=new ContentValues();
cv.put("name", "Hi");
cv.put("address", "There");
cv.put("type", "delivery");
cv.put("notes", "");
cv.put("feed", "");
cv.put("lat", "");
cv.put("lon", "");
getWritableDatabase().insert("restaurants", "name", cv);
}
There is no error but unfortunately no data is inserted as well. This should be very simple, please help me?

Use db.insert("restaurants", "name", cv);

Your approach is fine, inside SQLiteOpenHelper#onCreate() is the right place to put initial data since that is where you create the database in the state you like it to be.
But inside onCreate you use db.insert("restaurants", "name", cv) directly. You are not finished to create the writable database you try to get via getWritableDatabase() at that point. Not sure if that is the problem but it could be.

Malfunctioning on deleting from Sqlite database table (Relationship extraordinary behavior)

I havea weird problem in my android application which is related to database relations on foreign keys. The following codes describe my simple database's structure,
i have used SQLiteOpenHelper as a super class for handle database operation
private static final String CATEGORIES_TABLE = "CREATE TABLE __CATEGORIES_TBL(_id INTEGER PRIMARY KEY AUTOINCREMENT, _name TEXT NOT NULL, _desc TEXT NULL,"
+ "_create_date INTEGER NOT NULL, _update_date INTEGER NULL"
+ ", _parent_id INTEGER NULL, FOREIGN KEY(_parent_id) REFERENCES __CATEGORIES_TBL(_id) ON DELETE RESTRICT);";
private static final String CARDS_TABLE = "CREATE TABLE __CARDS_TBL(_id INTEGER PRIMARY KEY AUTOINCREMENT,"
+ "_value TEXT NOT NULL, _play_count INTEGER NULL, "
+ "_category_id INTEGER NOT NULL, FOREIGN KEY(_category_id) REFERENCES __CATEGORIES_TBL(_id) ON DELETE RESTRICT);";
#Override
public void onCreate(SQLiteDatabase db) {
try {
db.execSQL("PRAGMA foreign_keys = ON;");
db.execSQL(CATEGORIES_TABLE);
db.execSQL(CARDS_TABLE);
Logger.i("DB-INIT-DONE!");
} catch (Exception ex) {
Logger.e("Database on create error", ex);
}
}
as you see everything seems to be O.K and it is; I can insert, edit , select row(s) to/from both tables but unfortunately i can delete rows which they have child rows.
as i expected. because i set the FK (foreign-key) relation between the tow tables with ON DELETE RESTRICT mode therefore i expect to get an exception when i try to delete a row from parent table (__CATEGORIES_TBL) , actually the parent record is deleting and no exception happens,
by theory sqlite must prevent deleting any row in __CATEGORIES_TBL when it has one or more child row(s) in __CARDS_TBL or any child row(s) in __CATEGORIES_TBL but in my application i can delete rows when it has a parent-child relationship rows,
consider the following code (this is the deleting code)
private SQLiteDatabase db;
public long delete(long objId) {
try {
// TABLE_NAME can be __CATEGORIES_TBL or __CARDS_TBL based on program flow
return db.delete(TABLE_NAME, COLUMN_ROWID + "=" + objId, null);
} catch (Exception e) {
Logger.d("Unable to delete category <" + objId + ">.", e);
return -123456;
}
}
every call to db.delete returns 1 (means 1 row is deleted by this command) this code is executing under android 2.3 ;
Thanks in advance.

I get the behavior I'd expect from SQLite 3.7.9.
sqlite> CREATE TABLE __CATEGORIES_TBL (
...> _id INTEGER PRIMARY KEY AUTOINCREMENT,
...> _name TEXT NOT NULL,
...> _desc TEXT NULL,
...> _create_date INTEGER NOT NULL,
...> _update_date INTEGER NULL,
...> _parent_id INTEGER NULL,
...> FOREIGN KEY(_parent_id)
...> REFERENCES __CATEGORIES_TBL(_id) ON DELETE RESTRICT
...> );
sqlite>
sqlite> CREATE TABLE __CARDS_TBL(
...> _id INTEGER PRIMARY KEY AUTOINCREMENT,
...> _value TEXT NOT NULL,
...> _play_count INTEGER NULL,
...> _category_id INTEGER NOT NULL,
...> FOREIGN KEY(_category_id)
...> REFERENCES __CATEGORIES_TBL(_id) ON DELETE RESTRICT
...> );
sqlite>
sqlite> insert into __categories_tbl values
...> (1, 'name', 'desc',current_date,current_date,1);
sqlite> insert into __cards_tbl values (1, 'value',3, 1);
sqlite> pragma foreign_keys=on;
sqlite> select * from __categories_tbl;
1|name|desc|2012-08-25|2012-08-25|1
sqlite> delete from __categories_tbl;
Error: foreign key constraint failed
If I were you, I'd try to visually inspect the SQLite database after each step to see whether what you expect to happen is actually happening. IIRC, not every failure will raise an exception.
Foreign key support was introduced in version 3.6.19. There are compile-time settings that allow SQLite to parse foreign key constraints, but don't allow it to actually enforce them. (SQLITE_OMIT_TRIGGER defined, SQLITE_OMIT_FOREIGN_KEY not defined.) You should be able to tell whether your build of SQLite can enforce foreign keys by trying to create a trigger.
If creating a trigger fails with a parse error, then SQLite will parse foreign key statements, but won't enforce them. You'll need to recompile your build of 3.6.19, or upgrade to a newer version. (And check those settings before you compile.)
A column declared NOT NULL can appear to be empty if you've inserted an empty string. By default, NULL and empty strings look identical on output. You can tell whether a column contains nulls by selecting them.
select * from table_name where column_name is null;

about this problem i have put a db.execSQL("pragma foreign_keys=on;"); before delete statement in my app code then the problem solved, but i think this is unnecessary code maybe my phone's installed sqlite configs are wrong and needs to be reconfigured , is it possible to reconfigure the sqlite on phone ?
the test device is a HTC wildfire s (running sqlite version is 3.7.2)

How to check duplicates name in android database?

I want to enter name and phone number from two edit text.i use two buttons to save and show it in emulator using list view.After entering name and when i click save button how to check whether i have already entered the same name. i am new to android explanation will be really helpful.
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE "+tbname+"("+Key_id+" INTEGER PRIMARY KEY AUTOINCREMENT, "+Key_name+" TEXT,"+Key_mobile+" TEXT)");
}
public void n(String aa, String bb) {
SQLiteDatabase db=this.getWritableDatabase();
ContentValues cv=new ContentValues();
cv.put(Key_name, aa);
cv.put(Key_mobile, bb);
db.insert(tbname, Key_name, cv);
db.close();
}
public Cursor cr()
{
SQLiteDatabase db=getReadableDatabase();
String [] colms=new String[]{Key_id+" as _id",Key_name,Key_mobile};
Cursor cur=db.query(tbname, colms, null, null, null, null, null);
cur.moveToFirst();
return cur;
}

I would start with changing your table definition by adding the NOT NULL and UNIQUE constraints.
db.execSQL("CREATE TABLE "+tbname+"("+Key_id+" INTEGER PRIMARY KEY AUTOINCREMENT, "+Key_name+" TEXT NOT NULL UNIQUE,"+Key_mobile+" TEXT)");
Then you have a choice of methods to use for your insert. You can use:
insertOrThrow will return the id of your new record, or -1 on an error (and a constraint failure of not having a unique name would be an error).
insertWithOnConflict will return the id of the new record OR the primary key of the existing row if the input param 'conflictAlgorithm' = CONFLICT_IGNORE OR -1 if any error.
Personally, I would use insertWithOnConflict with the CONFLICT_IGNORE flag set. That way you can get the row id back for the duplicate record (as well as not letting the duplicate get entered).

Put UNIQUE in your table field definition an then use insertOrThrow. If you insert the same, insertOrThrow will cause an exception, you can intercept it.

SQLiteException - no such table

Im getting this error when i try to access my View
I've built my database/View using this
CREATE TABLE Boxer(
BoxerId INTEGER PRIMARY KEY AUTOINCREMENT,
Firstname NVARCHAR(50) NOT NULL,
Lastname NVARCHAR(50) NOT NULL
);
CREATE TABLE Match(
MatchId INTEGER PRIMARY KEY AUTOINCREMENT,
BoxerA INTEGER NOT NULL FOREIGN KEY REFERENCES Boxer(BoxerId),
BoxerB INTEGER NOT NULL FOREIGN KEY REFERENCES Boxer(BoxerId),
MatchDate date NOT NULL DEFAULT GETDATE(),
NumberOfRounds INTEGER NOT NULL DEFAULT 12
);
CREATE TABLE Round(
RoundId INTEGER PRIMARY KEY AUTOINCREMENT,
MatchId INTEGER NOT NULL FOREIGN KEY REFERENCES Match(MatchId),
BoxerA INTEGER NOT NULL DEFAULT 0,
BoxerB INTEGER NOT NULL DEFAULT 0,
Position INTEGER NOT NULL
);
/*
Building a view which dislpays matches with boxers names and total scores
*/
CREATE VIEW MatchDetail AS
SELECT Match.MatchId, A.BoxerId AS IdA, B.BoxerId AS IdB, A.Firstname + ' ' + A.Lastname AS NameA, B.Firstname + ' ' + B.Lastname AS NameB,
(SELECT SUM(R.BoxerA) AS Score FROM Round AS R WHERE (R.MatchId = Match.MatchId)) AS ScoreA,
(SELECT SUM(R.BoxerB) AS Score FROM Round AS R WHERE (R.MatchId = Match.MatchId)) AS ScoreB,
Match.MatchDate, Match.NumberOfRounds
FROM Boxer AS A INNER JOIN Match ON A.BoxerId = Match.BoxerA INNER JOIN Boxer AS B ON Match.BoxerB = B.BoxerId
I've pretty much built my app so far using the notepad example so I then call my DbHelper
Cursor MatchesCursor = mDbHelper.fetchAllMatchDetails();
This then calls the query
public Cursor fetchAllMatchDetails(){
return mDb.query(VIEW_MATCHDETAIL, new String[] {
"MatchId"
}, null, null, null, null, null);
}
VIEW_MATCHDETAIL is defined as a string = "MatchDetail"
and it's here where it crashes saying
no such table MatchDetail: while compiling SELECT MatchId FROM MatchDetail
anyone had this problem before?

You have some beautiful SQL there. Unfortunately only the first line of sql will be executed in SQLiteDatabase.execSQL. The rest will be ignored silently (convenient eh?). Split up the statements manually like this:
https://github.com/browep/fpt/blob/master/src/com/github/browep/nosql/NoSqlSqliteOpener.java
or if you like to keep your sql in a separate file, try this:
String sqlText = getSqlText();
for(String sqlStmt : sqlText.split(";"))
myDb.execSQL(slqStmt + ";");

What stands out to me is the use of datatypes like NVARCHAR(50). SQLite only has a very simple set of datatypes. I'm surprised it doesn't throw an exception when you install the app. Try using simply TEXT instead.

If you cannot access a database that you know you have initialized, try passing the Context from the Activity that created the table to the class trying to query the table. Use that Context as part of your connection initialization.