Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/10262#discussion_r47570429
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
---
@@ -422,7 +422,14 @@ private[sql] class JDBCRDD(
case IntegerConversion => mutableRow.setInt(i, rs.getInt(pos))
case LongConversion => mutableRow.setLong(i, rs.getLong(pos))
// TODO(davies): use getBytes for better performance, if the
encoding is UTF-8
- case StringConversion => mutableRow.update(i,
UTF8String.fromString(rs.getString(pos)))
+ case StringConversion =>
+ val s = rs.getString(pos)
+ if (s != null) {
+ mutableRow.update(i,
UTF8String.fromString(rs.getString(pos).trim))
+ }
+ else {
+ mutableRow.update(i, null)
+ }
--- End diff --
you could just do
```
case StringConversion =>
val newString = Option(rs.getString(pos)).map { s =>
UTF8String.fromString(s.trim) }.orNull
mutableRow.update(i, newString)
```
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