Interval (IVL)

A set of continuous values belonging to the same base data type.

High-level Interval Types

CHI defines nine interval specialization types:

  1. IVL<TS.DATE>
  2. IVL<TS.DATETIME>
  3. IVL<TS.FULLDATE>
  4. IVL<TS.FULLDATETIME>
  5. IVL.LOW<TS.DATE>
  6. IVL.LOW<TS.FULLDATE>
  7. IVL.HIGH<TS.FULLDATE>
  8. IVL.WIDTH<TS.FULLDATE>
  9. IVL<PQ.x>

Specialization Types

Below are the basic rules for each of the interval specification types:

Note: The low-closed, center, and high-closed attributes are all not allowed

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