Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/15977#discussion_r89115426
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
---
@@ -120,7 +120,13 @@ 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) => s"$attr IN (${compileValue(value)})"
+ case In(attr, value) =>
+ if (value.nonEmpty) {
+ s"$attr IN (${compileValue(value)})"
+ } else {
+ // Return false literal when value is empty.
+ s"false"
--- End diff --
Nit: remove interpolation
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