Add documentation for handling of NaNs

prestodb · May 31, 2024 · 158134f · 158134f
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commit 158134f
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diff --git a/presto-docs/src/main/sphinx/language/types.rst b/presto-docs/src/main/sphinx/language/types.rst
@@ -65,12 +65,22 @@ Floating-Point
 A real is a 32-bit inexact, variable-precision implementing the
 IEEE Standard 754 for Binary Floating-Point Arithmetic.
 
+It strays from the IEEE standard when it comes to handling of nans.
+In Presto, NaN is considered larger than any other value for
+all comparison and sorting operations. Additionally, NaN=NaN will
+be true for all equality and distinctness purposes
+
 ``DOUBLE``
 ^^^^^^^^^^
 
 A double is a 64-bit inexact, variable-precision implementing the
 IEEE Standard 754 for Binary Floating-Point Arithmetic.
 
+It strays from the IEEE standard when it comes to handling of nans.
+In Presto, NaN is considered larger than any other value for
+all comparison and sorting operations. Additionally, NaN=NaN will
+be true for all equality and distinctness purposes
+
 Fixed-Precision
 ---------------