Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/8391#discussion_r38473825
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
---
@@ -275,6 +275,10 @@ private[sql] class JDBCRDD(
*/
private def compileFilter(f: Filter): String = f match {
case EqualTo(attr, value) => s"$attr = ${compileValue(value)}"
+ // Since the null-safe equality operator is not a standard SQL
operator,
+ // This was written as using is-null and normal equality.
+ case EqualNullSafe(attr, value) =>
+ s"($attr = ${compileValue(value)} OR ($attr IS NULL AND
${compileValue(value)} IS NULL))"
--- End diff --
could this be null if attr is null but value is not null?
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