Available in versions: Dev (3.18) | Latest (3.17)

This is experimental functionality, and as such subject to change. Use at your own risk!

Merge OR predicates

Applies to ✅ Open Source Edition   ✅ Express Edition   ✅ Professional Edition   ✅ Enterprise Edition

An OR predicate combining comparison predicates that share the same operands can often be merged into a single comparison predicate.

Using Settings.transformPatternsMergeOrComparison, the following transformations can be achieved:

-- With Settings.transformPatternsMergeOrComparison active, this:
SELECT
  x = a OR x > a,
  x = a OR x < a,
  x > a OR x < a,
  x > a OR x != a,
  x < a OR x != a
  -- And many more
FROM tab;

-- ... is transformed into the equivalent expression:
SELECT
  x >= a, -- x = a OR x > a
  x <= a, -- x = a OR x < a
  x != a, -- x > a OR x < a
  x != a, -- x > a OR x != a
  x != a  -- x < a OR x != a
  -- And many more
FROM tab;

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