Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/17987#discussion_r116533688
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLSuite.scala
---
@@ -2018,21 +2019,25 @@ abstract class DDLSuite extends QueryTest with
SQLTestUtils {
Seq("a b", "a:b", "a%b", "a,b").foreach { specialChars =>
test(s"data source table:partition column name containing
$specialChars") {
+ // On Windows, it looks colon in the file name is illegal by
default. See
+ // https://support.microsoft.com/en-us/help/289627
+ assume(!Utils.isWindows || specialChars != "a:b")
--- End diff --
It seems `:` is not allowed on Windows by default -
https://support.microsoft.com/en-us/help/289627
**Windows**
```scala
scala> new java.io.File("a").mkdirs()
res0: Boolean = true
scala> new java.io.File("a:").mkdirs()
res1: Boolean = false
scala> new java.io.File("a:b").mkdirs()
res2: Boolean = false
scala> new java.io.File("a\\:b").mkdirs()
res3: Boolean = false
```
**Mac**
```scala
scala> new java.io.File("a:b").mkdirs()
res0: Boolean = true
```
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