Question

I use this method to delete a row in my sqlite db:

db.execSQL("delete from "+TABLE_NUMS+" where _ID = '" + this.rowID + "'");

and then I update the rest of Ids to make my entries consecutive:

db.execSQL("UPDATE "+TABLE_NUMS+" set _ID = (_ID - 1) WHERE _ID > "+this.rowID);

And it works fine, but when I add new entries to my DB, the ID of the new entries still add as if the deleted entries existed, say I have 10 rows with IDs starting from 1 to 10, and then I delete number 5 and 6, the rows become 1 to 8, but the new entry’s ID will be 11. So my IDs sequence would be 1 to 8 and 11. How can I fix this?

Answer 1

SQLite keeps track of the largest ROWID that a table has ever held using the special SQLITE_SEQUENCE table. You cam modify that sequence as:

UPDATE SQLITE_SEQUENCE SET seq = this.ID -1 WHERE name = TABLE_NUMS 

The same functionality is asked in this question.