The meaning of the title: Every connected block in the desert is a cactus; a connected block is a cactus if and only if there are no heavy edges and self-rings in the connected block , And each sid
Tag: forest
Looking for the build forest (with recursive, postgreSQL 9.5)
I have a table of identities (ie aliases) for any number of people. Each row has a previous name and a new name. In production, there are approximately 1M rows. For example:
id, old, new
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