Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/15977#discussion_r89618869
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
---
@@ -120,6 +120,7 @@ object JDBCRDD extends Logging {
case StringStartsWith(attr, value) => s"${attr} LIKE '${value}%'"
case StringEndsWith(attr, value) => s"${attr} LIKE '%${value}'"
case StringContains(attr, value) => s"${attr} LIKE '%${value}%'"
+ case In(attr, value) if value.isEmpty => s"IF(${attr} IS NULL, NULL,
false)"
--- End diff --
`IF` is not a part of the SQL standard, use: `CASE WHEN $attr IS NULL THEN
NULL ELSE FALSE END`
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