Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/8096#discussion_r36717954
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/sources/filters.scala ---
@@ -38,6 +38,14 @@ case class EqualTo(attribute: String, value: Any)
extends Filter
/**
* A filter that evaluates to `true` iff the attribute evaluates to a value
+ * null safe and equal to `value`.
--- End diff --
maybe this
```
Performs equality comparison, similar to [[EqualTo]]. However, this differs
from [[EqualTo]] in that it returns true (rather than NULL) if both inputs are
NULL, and false (rather than NULL) if one of the input is NULL and the other is
not NULL.
```
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