Unexpected behaviour of the sum function
(1) By anonymous on 2020-09-01 11:50:05 [link] [source]
Due to a bug in our program we discovered an unexpected behaviour of the function sum().
We had the following scenario:
CREATE TABLE "test" ("x" REAL); INSERT INTO test('1,2'); INSERT INTO test('1,5'); SELECT SUM(x) FROM test
I would expect an error message or a warning instead of a result pretending to be valid.
(2) By Richard Hipp (drh) on 2020-09-01 12:08:04 in reply to 1 [source]
SQLite allows you to use a string as a number. It uses whatever prefix of the string that looks like a number. In your case, that prefix is '1'. So the answer of 2.0 is correct.