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SUMMARY:Relational databases versus relational models - Alex Gurney\, WebF
 low
DTSTART:20220211T140000Z
DTEND:20220211T150000Z
UID:TALK165298@talks.cam.ac.uk
CONTACT:Jamie Vicary
DESCRIPTION:*THIS TALK WILL BE IN SS03\, NOT FW26*\n\nThe propaganda has i
 t that relational algebra is the foundation of relational databases: we ca
 n understand SQL queries in terms of relational join\, projection\, and ot
 her operators. When cornered\, some may admit that odd features of SQL are
  hard to model\, like NULLs\, SELECT DISTINCT\, and aggregations. I argue 
 that the position is even worse\, and that relational models have no story
  for the core use cases of relational databases\, where we care about tran
 sactional semantics\, locking\, and predictability of performance. I will 
 give examples of problems encountered in large-scale production settings t
 hat were beyond the reach of current theory\, relational or otherwise.
LOCATION:FW26
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