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 AND predicates

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

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

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

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

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

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