Gidday guys

I'm working with SQLite in Flash.

I have this unique index:

CREATE UNIQUE INDEX songsIndex ON songs ( DiscID, Artist, Title )

I have a parametised recursive functionset up to insert any new rows
(single or multiple).

It works fine if I try to insert a row with the same DiscID, Artist and
Title as an existing row - ie it ignores inserting the existing row, and
tells me that 0 out of 1 records were updated - GOOD.

However, if, for example the DiscId is blank, but the artist and title are
not, a new record is created when there is already one with a blank DiscId
and the same artist and title - BAD.

I traced out the disc id prior to the insert, and Flash is telling me it's
undefined. So I've coded it to set anything undefined to "" (an empty
string) to make sure it's truly an empty string being inserted - but
subsequent inserts still ignore the unique index and add a brand new row
even though the same row exists.

What am I misunderstanding?

Thanks for your time and help.

-- 
Shaun Thomson
Owner - SongbookDB
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