> This is apparently because for replica identity full the comparison of
> the search key against the tuple value goes through datumIsEqual(),
> which doesn't work for TOAST values.
> We might be able to refine that, but there is a general problem that
> without an index and an operator class, we are just doing our random
> best to match the values.

In other word, pass-by-value types work in this case? If so, we can
document it or throw an error while executing ALTER REPLICA IDENTITY
FULL on tables consisting of non pass-by-values column types to
mitigate the problem.

Best regards,
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php

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