IF() statement alternative in SQLite

Question

I have the code for MySQL (perl):

UPDATE pages
SET rkey = rkey + 2,
    lkey = IF(lkey >= $key, lkey + 2, lkey)
WHERE rkey >= $key

I

Answer 1

SQLite version 3.32.0 and newer support IIF.

iif(X,Y,Z)

The iif(X,Y,Z) function returns the value Y if X is true, and Z otherwise.

The iff(X,Y,Z) function is logically equivalent to and generates the same bytecode as the CASE expression "CASE WHEN X THEN Y ELSE Z END".

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E.g.

UPDATE pages
SET rkey = rkey + 2,
    lkey = IIF(lkey >= $key, lkey + 2, lkey)
WHERE rkey >= $key;