Develop Reference

android SQLiteException: no such column on custom roms

On devices with modified android versions i get this error. For example on Xiaomi devices.
String query = "select * from dialogues where userId = ? and topChat = 0 order by updatedAtByClient desc";
Cursor dialogRes = db.rawQuery(query, new String[]{userId});
Here i get exception:
android.database.sqlite.SQLiteException: no such column: topChat (code 1):,
while compiling: select * from dialogues where userId = ? and topChat = 0
order by updatedAtByClient desc
I have written the exception message by hand, because the user has sent me it in a screenshot, so there might be typos.
How can this be fixed, and why does this happen?
UPD1:
the create table statement looks similar to this:
"CREATE TABLE IF NOT EXISTS dialogues(fieldName VARCHAR, camelCaseFieldName VARCHAR,
topChat INTEGER, createdAt DATE);";
And i have a correctly implemented update method for when im changing the DB structure, but this particular table and field name did not change for a long time.
UPD2:
i have made an apk for the user with problems, that logs that table columns, and i did see the problematic column in the log, and user says that this version works ok.
So seems that this error does not happen 100% of times. Very strange. Maybe there is a way to check the database for integrity after creating it, and recreate tables with errors?

I don't believe this would be a xiaomi issue. it rather seems be the result of an unfortunate migration, where a new column had not been added and subsequently, the user might still work with the previous version of the table. and there is no other logical explanation for an absent column), simply because either the CREATE TABLE statement works - or it doesn't.
one can still work around it with ALTER TABLE. eg. when that SQLiteException occurs, addColumnIfNotExists("dialogues", "topChat", "INTEGER DEFAULT 0"); ...in order not to cause data-loss by dropping the table, only because it lacks some column.
public void addColumnIfNotExists(String tableName, String columnName, String dataType) {
Cursor cursor = null;
try {
cursor = db.rawQuery("SELECT * FROM " + tableName, null);
if(! Arrays.asList(cursor.getColumnNames()).contains(columnName)) {
db.execSQL(String.format("ALTER TABLE %s ADD COLUMN %s %s", tableName, columnName, dataType));
}
} finally {
if(cursor != null) {
cursor.close();
}
}
}

Android User complaines that app data lost after update

In the last time I get some strange reviews on the PlayStore.
Whyever after installing the update of my app, users complain all their app data has been wiped. I have absolutely no idea how this can happen. Database is only recreated if tables do not exist.
Code which is executed after opening database connection:
private void createTablesIfNotExist() {
//query tables
Cursor c = DatabaseManager.executeSelect("SELECT name FROM sqlite_master WHERE type = \"table\"");
//if tables already created, do nothing (+1 because of header table)
if (!((tableAmount + 1) == c.getCount())) {
//meta data table
this.database.execSQL("DROP TABLE IF EXISTS android_metadata;");
this.database.execSQL("CREATE TABLE android_metadata (locale TEXT);");
this.database.execSQL("INSERT INTO android_metadata VALUES('de_DE');");
}
//create event table
c = DatabaseManager.executeSelect("SELECT name FROM sqlite_master WHERE name = \"" + EVENTS + "\"");
c.moveToFirst();
if(c.isAfterLast()) {
this.database.execSQL("CREATE TABLE.....");
}
c = DatabaseManager.executeSelect("SELECT name FROM sqlite_master WHERE name = \"" + ASSIGNED_PRODUCTS + "\"");
c.moveToFirst();
if(c.isAfterLast()) {
this.database.execSQL("CREATE TABLE.......");
}
}
Has anyone an idea? Thanks :)

I think you don't "rewrite" your data from old database to new one.
Android: upgrading DB version and adding new table
Check this link and if it is your problem then if possible you can transfer data for each version to new one and everything will be fine. You have to remember to design database and dataflow to keep in mind that old users can lack some data, so some data in new database can be nullable

Android SQLite check if table exist [duplicate]

I have an android app that needs to check if there's already a record in the database, and if not, process some things and eventually insert it, and simply read the data from the database if the data does exist. I'm using a subclass of SQLiteOpenHelper to create and get a rewritable instance of SQLiteDatabase, which I thought automatically took care of creating the table if it didn't already exist (since the code to do that is in the onCreate(...) method).
However, when the table does NOT yet exist, and the first method ran upon the SQLiteDatabase object I have is a call to query(...), my logcat shows an error of "I/Database(26434): sqlite returned: error code = 1, msg = no such table: appdata", and sure enough, the appdata table isn't being created.
Any ideas on why?
I'm looking for either a method to test if the table exists (because if it doesn't, the data's certainly not in it, and I don't need to read it until I write to it, which seems to create the table properly), or a way to make sure that it gets created, and is just empty, in time for that first call to query(...)
EDIT
This was posted after the two answers below:
I think I may have found the problem. I for some reason decided that a different SQLiteOpenHelper was supposed to be created for each table, even though both access the same database file. I think refactoring that code to only use one OpenHelper, and creating both tables inside it's onCreate may work better...

Try this one:
public boolean isTableExists(String tableName, boolean openDb) {
if(openDb) {
if(mDatabase == null || !mDatabase.isOpen()) {
mDatabase = getReadableDatabase();
}
if(!mDatabase.isReadOnly()) {
mDatabase.close();
mDatabase = getReadableDatabase();
}
}
String query = "select DISTINCT tbl_name from sqlite_master where tbl_name = '"+tableName+"'";
try (Cursor cursor = mDatabase.rawQuery(query, null)) {
if(cursor!=null) {
if(cursor.getCount()>0) {
return true;
}
}
return false;
}
}

I know nothing about the Android SQLite API, but if you're able to talk to it in SQL directly, you can do this:
create table if not exists mytable (col1 type, col2 type);
Which will ensure that the table is always created and not throw any errors if it already existed.

Although there are already a lot of good answers to this question, I came up with another solution that I think is more simple. Surround your query with a try block and the following catch:
catch (SQLiteException e){
if (e.getMessage().contains("no such table")){
Log.e(TAG, "Creating table " + TABLE_NAME + "because it doesn't exist!" );
// create table
// re-run query, etc.
}
}
It worked for me!

This is what I did:
/* open database, if doesn't exist, create it */
SQLiteDatabase mDatabase = openOrCreateDatabase("exampleDb.db", SQLiteDatabase.CREATE_IF_NECESSARY,null);
Cursor c = null;
boolean tableExists = false;
/* get cursor on it */
try
{
c = mDatabase.query("tbl_example", null,
null, null, null, null, null);
tableExists = true;
}
catch (Exception e) {
/* fail */
Log.d(TAG, tblNameIn+" doesn't exist :(((");
}
return tableExists;

Yep, turns out the theory in my edit was right: the problem that was causing the onCreate method not to run, was the fact that SQLiteOpenHelper objects should refer to databases, and not have a separate one for each table. Packing both tables into one SQLiteOpenHelper solved the problem.

// #param db, readable database from SQLiteOpenHelper
public boolean doesTableExist(SQLiteDatabase db, String tableName) {
Cursor cursor = db.rawQuery("select DISTINCT tbl_name from sqlite_master where tbl_name = '" + tableName + "'", null);
if (cursor != null) {
if (cursor.getCount() > 0) {
cursor.close();
return true;
}
cursor.close();
}
return false;
}
sqlite maintains sqlite_master table containing information of all tables and indexes in database.
So here we are simply running SELECT command on it, we'll get cursor having count 1 if table exists.

You mentioned that you've created an class that extends SQLiteOpenHelper and implemented the onCreate method. Are you making sure that you're performing all your database acquire calls with that class? You should only be getting SQLiteDatabase objects via the SQLiteOpenHelper#getWritableDatabase and getReadableDatabase otherwise the onCreate method will not be called when necessary. If you are doing that already check and see if th SQLiteOpenHelper#onUpgrade method is being called instead. If so, then the database version number was changed at some point in time but the table was never created properly when that happened.
As an aside, you can force the recreation of the database by making sure all connections to it are closed and calling Context#deleteDatabase and then using the SQLiteOpenHelper to give you a new db object.

Kotlin solution, based on what others wrote here:
fun isTableExists(database: SQLiteDatabase, tableName: String): Boolean {
database.rawQuery("select DISTINCT tbl_name from sqlite_master where tbl_name = '$tableName'", null)?.use {
return it.count > 0
} ?: return false
}

public boolean isTableExists(String tableName) {
boolean isExist = false;
Cursor cursor = db.rawQuery("select DISTINCT tbl_name from sqlite_master where tbl_name = '" + tableName + "'", null);
if (cursor != null) {
if (cursor.getCount() > 0) {
isExist = true;
}
cursor.close();
}
return isExist;
}

no such table exists: error is coming because once you create database with one table after that whenever you create table in same database it gives this error.
To solve this error you must have to create new database and inside the onCreate() method you can create multiple table in same database.

Important condition is IF NOT EXISTS to check table is already exist or not in database
like...
String query = "CREATE TABLE IF NOT EXISTS " + TABLE_PLAYER_PHOTO + "("
+ KEY_PLAYER_ID + " TEXT,"
+ KEY_PLAYER_IMAGE + " TEXT)";
db.execSQL(query);

i faced that and deal with it by try catch as simple as that i do what i want in table if it not exist will cause error so catch it by exceptions and create it :)
SQLiteDatabase db=this.getWritableDatabase();
try{
db.execSQL("INSERT INTO o_vacations SELECT * FROM vacations");
db.execSQL("DELETE FROM vacations");
}catch (SQLiteException e){
db.execSQL("create table o_vacations (id integer primary key ,name text ,vacation text,date text,MONTH text)");
db.execSQL("INSERT INTO o_vacations SELECT * FROM vacations");
db.execSQL("DELETE FROM vacations");
}

.....
Toast t = Toast.makeText(context, "try... " , Toast.LENGTH_SHORT);
t.show();
Cursor callInitCheck = db.rawQuery("select count(*) from call", null);
Toast t2a = Toast.makeText(context, "count rows " + callInitCheck.getCount() , Toast.LENGTH_SHORT);
t2a.show();
callInitCheck.moveToNext();
if( Integer.parseInt( callInitCheck.getString(0)) == 0) // if no rows then do
{
// if empty then insert into call
.....

Insert or Replace Multiple Row with where condition in SQLite Query

I need a single SQLite query to insert or update in SQLite table.
MyTable:
Id(Primary key and not null)
Name
PhoneNumber
Expected Query: If the Id is not present then have to insert a new row
and If the existing row value is changed then update the row when inserting multiple row.
EDIT 1:
I have posted INSERT query i have tried in Insert Multiple Rows in SQLite Error (error code = 1). Like that i I have tried using "INSERT OR REPLACE". But it is working with Firfox SQLite Manager Not working with Android SQLite.
I have used sDataBase.execSQL(query) to execute this query.

Try this:
String sql = "INSERT OR REPLACE INTO MyTable (Name, PhoneNumber) VALUES (?,?)";
SQLiteStatement st = db.compileStatement(sql);
And write or update:
public void writeOrUpdateData(ArrayList<MyClass> data) {
try {
db.beginTransaction();
for(int i = 0; i < data.size(); i++) {
st.clearBindings();
st.bindLong(1, data.get(i).getName());
st.bindString(2, data.get(i).getPhoneNumber);
st.executeInsert();
}
db.setTransactionSuccessful();
}
catch(Exception e) {}
finally {
db.endTransaction();
}
}
This way you get bulk insert/update, which is quite efficient!

I have created database with primary key only in Firefox SQLite Manager. I have missed this in SQLite database in Android. Now i have created database with PRIMARY KEY and NOT NULL. Now Working fine.

How to avoid inserting duplicate's into SQLite data base?

I am getting contact information from server when i login through account. i am storing those information in SQLite, when user login second time, I don't want to same duplicate contact inserting again into SQLite.
i tried like this but not working
boolean exist= contact_db.CheckItem(entry.getUser());
if(!exist) {
// insert
}else {
// don't insert
}
code in DB class
Cursor mCursor = database.query(ContactsDB.TABLE_CONTACTS, allColumns,
ContactsDB.CONTACT_USERID + "= ' " + name +"'" , null, null, null, null);
if (mCursor != null && mCursor.moveToFirst())
return false;
else return true;
How to avoid the duplicates while inserting the contacts into data base?

Better would be to create a UNIQUE index for that column using UNIQUE Keyword. An example can be found here and also a simpler one can be found here.
After creating table you have to create a UNIQUE INDEX for row as,
CREATE UNIQUE INDEX idx_something ON Table_name
(column_name_1, column_name_2,....);

Check the database for the information.
If the data is present in the database don't do anything if not insert the information into the database