Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/22237#discussion_r212887790
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
---
@@ -554,18 +554,22 @@ case class JsonToStructs(
@transient
lazy val converter = nullableSchema match {
case _: StructType =>
- (rows: Seq[InternalRow]) => if (rows.length == 1) rows.head else null
+ (rows: Iterator[InternalRow]) => if (rows.hasNext) rows.next() else
null
case _: ArrayType =>
- (rows: Seq[InternalRow]) => rows.head.getArray(0)
+ (rows: Iterator[InternalRow]) => if (rows.hasNext)
rows.next().getArray(0) else null
case _: MapType =>
- (rows: Seq[InternalRow]) => rows.head.getMap(0)
+ (rows: Iterator[InternalRow]) => if (rows.hasNext)
rows.next().getMap(0) else null
}
- @transient
- lazy val parser =
- new JacksonParser(
- nullableSchema,
- new JSONOptions(options + ("mode" -> FailFastMode.name),
timeZoneId.get))
+ @transient lazy val parsedOptions = new JSONOptions(options,
timeZoneId.get)
+ @transient lazy val rawParser = new JacksonParser(nullableSchema,
parsedOptions)
--- End diff --
How about this?
```
@transient lazy val parser = {
val parsedOptions = new JSONOptions(options, timeZoneId.get)
val rawParser = new JacksonParser(nullableSchema, parsedOptions)
val createParser = CreateJacksonParser.utf8String _
new FailureSafeParser[UTF8String](
input => rawParser.parse(input, createParser, identity[UTF8String]),
parsedOptions.parseMode,
schema,
parsedOptions.columnNameOfCorruptRecord,
parsedOptions.multiLine)
}
```
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