Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/12119#discussion_r58281660
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala ---
@@ -246,22 +248,58 @@ final class DataFrameWriter private[sql](df:
DataFrame) {
* @since 2.0.0
*/
def startStream(): ContinuousQuery = {
- val dataSource =
- DataSource(
- df.sqlContext,
- className = source,
- options = extraOptions.toMap,
- partitionColumns = normalizedParCols.getOrElse(Nil))
-
- val queryName = extraOptions.getOrElse("queryName",
StreamExecution.nextName)
- val checkpointLocation = extraOptions.getOrElse("checkpointLocation", {
- new Path(df.sqlContext.conf.checkpointLocation,
queryName).toUri.toString
- })
- df.sqlContext.sessionState.continuousQueryManager.startQuery(
- queryName,
- checkpointLocation,
- df,
- dataSource.createSink())
+ if (source == "memory") {
+ val queryName =
+ extraOptions.getOrElse(
+ "queryName", throw new AnalysisException("queryName must be
specified for memory sink"))
+ val checkpointLocation = extraOptions.get("checkpointLocation").map
{ userSpecified =>
+ new Path(userSpecified).toUri.toString
+ }.orElse {
+ val checkpointConfig =
df.sqlContext.conf.getConfOption(SQLConf.CHECKPOINT_LOCATION)
+ checkpointConfig.map { location =>
+ new Path(location, queryName).toUri.toString
+ }
+ }.getOrElse {
+ Utils.createTempDir("memory.stream").getCanonicalPath
--- End diff --
Use `Utils.createTempDir(namePrefix = "memory.stream")` so that the folder
comes to `java.io.tmpdir`?
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