Question

I have two SQLite databases attached into one connection: db1 and db2. I have a view that UNIONS the tables from both databases and adds a column ‘database’ specifying which database it came from. I am trying to create a trigger on insert into the view that will instead insert into the correct database.

Imagine the following schema for table Data:

id     INTEGER PRIMARY KEY,
parent INTEGER,
data   TEXT

This would be the schema for the view DataView:

id       INTEGER PRIMARY KEY,
database TEXT,
parent   INTEGER,
data     TEXT

What I have so far:

CREATE TRIGGER DataViewInsertTrigger AFTER INSERT ON DataView
BEGIN 
    INSERT INTO database.Data 
        SELECT database
        FROM DataView
        WHERE id=new.parent 
END;

Is what I’m trying to do even possible? If so, how would I finish the trigger?

Answer 1

While Borealid is correct that the trigger itself cannot insert into a different file, what you can do is call a custom sqlite function which itself generates a query to insert into a different file.