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Quote: AQuery variables and operators refer to arrays (a column); e.g., price - prev(price) is daily-change-in-price
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arrays
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set-oriented languages
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temporal database
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co-sequence operations
Quotation Skeleton
In contrast [to SQL's row-orientation], AQuery adopts a column-oriented semantics … to array; e.g., expressions always define mappings from … price-prev(price) … [p. 4] is element-wise subtraction [A[i] - A[i-1] or A[0]-A[0]] … The function prev() is a sample of the … [It] is order-dependent and size-preserving. Google-1 Google-2
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Topic: arrays (57 items)
Topic: set-oriented languages (20 items)
Topic: temporal database (23 items)
Topic: co-sequence operations (8 items)