Hi -
"bug_id" is, of course, the primary key in table "bugs".
"blocked" and "dependson" are both foreign keys in table "dependencies". If one bug depends on another, then "blocked" is the bug ID of the dependent bug, and "dependson" is the bug ID of the bug it depends on.
There is one row in "dependencies" for each "blocked" bug in the system.
'Hope that helps .. PSM
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