How can I reset a autoincrement sequence number in sqlite

Question

How to update table sqlite_sequence in Ormlite ? I just need update seq. How can I get that table via ORMLite ?

EDIT

I can\'t find ORLite t

Answer 1

Building on Marcos Vasconcelos' answer:

UPDATE sqlite_sequence SET seq = (SELECT MAX(col) FROM Tbl) WHERE name="Tbl"

This query will set seq to the largest value in the col identity column in the Tbl table, so there is no risk of violating constraints.

Answer 2

UPDATE SQLITE_SEQUENCE SET SEQ= 'value' WHERE NAME='table_name';

Answer 3

Inside your .db file there's an table called sqlite_sequence

Each row has two columns name which is the name of the table seq a integer indicating the current last value at this table

You can update it to 0

But beware if your table use this id as the unique identifier.

Answer 4

If you want to issue general database commands in ORMLite, you can use the updateRaw method. See the javadocs. There is also executeRaw for other commands.

lessonDao.updateRaw("delete from 'lesson';");
lessonDao.updateRaw("delete from sqlite_sequence where name='lesson';");
weekDefinitionDao.updateRaw("delete from 'weekdefinition';");
weekDefinitionDao.updateRaw(
    "delete from sqlite_sequence where name='weekdefinition';");

You could also drop and recreate the table as well:

TableUtils.dropTable(WeekDefinition.class);
TableUtils.dropTable(Lesson.class);
TableUtils.createTable(Lesson.class);
TableUtils.createTable(WeekDefinition.class);

I think the real question is why is your application depending on this database internal number? It really shouldn't care.

• How about not displaying the number at all so it can be 1 or 1001 and your application won't matter?
• You could also never remove the lessons at all but maybe add a hidden boolean field. So if they get re-added, the hidden field could be set to false and Math would still be at id #1.

Answer 5

This worked for me in my database : (I Set the id before one, then after deleting one row, when I add new data row again, the auto increment serial remain ok ) :

 public void  updateSerialNumber ( long memberId){
        String query = "UPDATE SQLITE_SEQUENCE SET SEQ= '"+(memberId-1)+"' WHERE NAME='"+ReportBigHelper.TABLE_MEMBER+"'";
        database.execSQL(query);
    }