Piotr Sarna 7b329f7102 digest: add null values to row digest ...

With the new hashing routine, null values are taken into account
when computing row digest. Previous behavior had a regression
which stopped computing the hash after the first null value
is encountered, but the original behavior was also prone
to errors - e.g. row [1, NULL, 2] was not distinguishable
from [1, 2, NULL], because their hashes were identical.
This hashing is not yet active - it will only be used after
the next commit introduces a proper cluster feature for it.

2020-09-10 13:16:44 +02:00

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