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What is a sparse GSI?
This interview card answers: What is a sparse GSI? Pattern. Item appears only if GSI key attribute exists — great for subsets. Leaderboard / open-orders examples.
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What this card says
What it is
Pattern.
Why it matters
Item appears only if GSI key attribute exists — great for subsets.
sparse GSI
How / example
Leaderboard / open-orders examples.
MNC: cost win.