That is how the built-in method works, and for good reason. My real suggestion is simply to live with the gaps. You could try to implement a gapless auto-increment using triggers, significantly slowing down your application. Unfortunately, SQLite doesn't have the simplest solution, which is simply to call row_number() on the auto-incremented keys. Generally, that is a really bad idea from a performance perspective. Assuming you have an ID field in your testscore table you could just easily add ORDER BY ID ASC to your select query. Basically, each transaction on the table would need to be completely serialized (that is completed and committed) before the next one can take place. Why not? Because no-gaps would incur a lot more overhead on the database. The mechanism for allocating the keys does not guarantee no gaps. They are increasing, so later inserts have larger values than earlier ones.MIdMail INTEGER PRIMARY KEY AUTOINCREMENT,Īuto-increment keys behave the way they do specifically because the database guarantees their behavior - regardless of concurrent transactions and transaction failures. Table Mail Example (replaced with pseudo Addresses) Is there a way to prevent this increase of auto-increment key on every INSERT OR IGNORE? I also tried INSERT OR REPLACE, but this will increment the Id of the dataset on every run of the command, so this is not a solution at all. Unfortunately, SQLite doesn't have the simplest solution, which is simply to call rownumber() on the auto-incremented keys. CREATE PROCEDURE SPGetLastAutoInc name varchar, lastAutoResult INT OUTPUT AS INSERT INTO Tags (name) values (name) SET lastAutoResult IDENTITY - Return the number of all items ordered. The keyword AUTOINCREMENT can be used with INTEGER field only. IN SQL Server has IDENTITY system Variable. We can auto increment a field value by using AUTOINCREMENT keyword when creating a table with specific column name to auto increment. I know there are 2^63-1 possible keys, so a long time to use them all up. SQLite AUTOINCREMENT is a keyword used for auto incrementing a value of a field in the table. Creating a simple database and have the rows with an id so I can select row values later: conn nnect('APIlan.db') c conn.cursor() c. So after every run the the last auto-increment key is incremented by 500k. and do an INSERT if needed.įor every INSERT OR IGNORE the auto-increment, no matter if ignored or done the auto-increment Id is incremented. This approach is MUCH faster than checking the existence with SELECT. I'm using INSERT OR IGNORE to just blindly add the mail addresses to the table and if it exists ignore the update. The table is used in 4 other tables and it is mainly used to save storage (String is only saved once and not 4 times). I'm using a table Mail with auto-increment Id and Mail Address.
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