Web Reference: Oct 1, 2014 · Pg supports two comparison statements IS DISTINCT FROM and IS NOT DISTINCT FROM, these essentially treat NULL as if it was a known value, rather than a special case for unknown. Jan 17, 2026 · To address this, PostgreSQL provides the `IS DISTINCT FROM` operator—a powerful tool designed explicitly for safe and intuitive `NULL`-aware comparisons. But how does it stack up against traditional workarounds like `COALESCE` or complex `OR` conditions? Apr 27, 2023 · From the docs Comparison operators: For non-null inputs, IS DISTINCT FROM is the same as the operator. However, if both inputs are null it returns false, and if only one input is null it returns true.
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