Question

I’m using sqlite3 and would like to know, if there is a fast way to retrieve the primary key created during the last insert statement in table A, so I can use it as foreign key for different insert statement in table B. For example, first add a new car brand in one table, then add some models of the brand in a different table.

TABLE car_brands (
brandID INTEGER PRIMARY KEY NOT NULL, 
name TEXT
)

TABLE car_models (
modelID INTEGER PRIMARY KEY NOT NULL,
brandID INTEGER REFERENCES brandID,
name TEXT
)

sqlite3_last_insert_rowid() is no option, since I do not know if another thread is updating the database during this operation.

Will I have to retrieve it using a separate statement?

Greetings,
curiosity

Answer 1

According to the online help, both sqlite3_last_insert_rowid() and last_insert_rowid() (for use within SQL) are connection specific.

As long as you ensure multiple threads are not sharing the same connection, you won’t get concurrency issues with sqlite3_last_insert_rowid().

And within your SQL statements, one connection can only be running one query. Provided you have both the INSERT and the call to last_insert_rowid() within the same batch, that shouldn’t have concurrency issues either.