On Wed, Dec 02, 2009 at 09:38:54AM -0000, Nick Shaw scratched on the wall:
> You don't need to define the PRIMARY KEY as NOT NULL - it's implied.
Yes, you do. You shouldn't, but you do:
http://sqlite.org/lang_createtable.html
According to the SQL standard, PRIMARY KEY should imply NOT NULL.
Unfortunately, due to a long-standing coding oversight, this is not
the case in SQLite. SQLite allows NULL values in a PRIMARY KEY
column.
> The column constraint flow diagram in the documentation in fact doesn't
> allow it:
> http://www.sqlite.org/syntaxdiagrams.html#column-constraint
The diagrams are for clear human readability, not to define the
accepted language.
-j
--
Jay A. Kreibich < J A Y @ K R E I B I.C H >
"Our opponent is an alien starship packed with atomic bombs. We have
a protractor." "I'll go home and see if I can scrounge up a ruler
and a piece of string." --from Anathem by Neal Stephenson
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