Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/13041#discussion_r62793802
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/DefaultSource.scala
---
@@ -61,7 +61,9 @@ class DefaultSource extends FileFormat with
DataSourceRegister {
val firstRow = new LineCsvReader(csvOptions).parseLine(firstLine)
val header = if (csvOptions.headerFlag) {
- firstRow
+ firstRow.zipWithIndex.map { case (value, index) =>
+ if (value == "" || value == null) s"C$index" else value
--- End diff --
I mean if the header is a empty string then, I think the field name should
be a empty string since apparently it works with fields named empty strings. I
tested this by manually giving a schema. If the header is used for schema, then
I think the names should be as they are. We don't really change field names
specified in ORC, Parquet or JSON.
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