Hi all,
in the docs I read:
"Adding a column with a non-null default [...] will require the entire table to be rewritten"
I guess that that can't be read as "you can always assume that adding a nullable column to a table won't rewrite the whole table".
I'm asking because since the page layout includes a null bitmap that
"If it is present it begins just after the fixed header and occupies enough bytes to have one bit per data column", I guess that when all the bits in the bitmap are used when I add a column (even a nullable one) the table gets rewritten (to add a new byte to the nullable bitmap); is this true?