I implemented the user-visible side of this (FKs in particular) using a
new "FOR SHARE" clause to SELECT.  This is of course open to
suggestions.  Inside the grammar I hacked it using the productions for
FOR UPDATE, and stashed a String as the first node of the relid List.


Well MySQL uses "IN SHARE MODE"...

http://dev.mysql.com/doc/mysql/en/innodb-locking-reads.html

Chris

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