Hi.
What is the technical difference between adding a column to a table
and then apply a "set value = ..." to all columns and adding a column
with a default value = ...?
I have seen that the first duplicates all rows, I had to vacuum and
reindex the whole table. Okay so far, I have expected this. But this
wasn't necessary with the second option, nevertheless, fetching some
rows showed, that the value of the new column was my default value.
So, I'm curious: what happens (not) here?
Thx for the explanation.
cug
