HyukjinKwon commented on a change in pull request #28896:
URL: https://github.com/apache/spark/pull/28896#discussion_r444833442
##########
File path: sql/core/src/test/resources/test-data/mixed-types1.csv
##########
@@ -0,0 +1,4 @@
+col_mixed_types
+2012
+1997
+True
Review comment:
Let's don't bother to create new data file here. You can write the test
codes as below instead.
```scala
withTempPath { path =>
Seq("col_mixed_types", "2012", "1997",
"True").toDS.write.text(path.getCanonicalPath)
val df = spark.read.format("csv")
.option("header", "true")
.option("inferSchema", "true")
.load(path.getCanonicalPath)
assert(data.schema.last == StructField("col_mixed_types", StringType,
true))
}
```
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