SQLite insert or ignore and return original _rowid_

The way that worked the best for me was to insert or ignore the values, and the select the rowid in two separate steps. I used a unique constraint on the data column to both speed up selects and avoid duplicates.

sql.execute("INSERT OR IGNORE INTO foo(data) VALUES(?);" ("Some text.", ))
last_row_id = sql.execute("SELECT id FROM foo WHERE data = ?;" ("Some text. ", ))

The select statement isn't as slow as I thought it would be. This, it seems, is due to SQLite automatically creating an index for the unique columns.