Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/20369#discussion_r164007657
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -1110,6 +1110,13 @@ object SQLConf {
.timeConf(TimeUnit.MILLISECONDS)
.createWithDefault(100)
+ val DISABLED_V2_STREAMING_WRITERS =
buildConf("spark.sql.streaming.disabledV2Writers")
+ .internal()
+ .doc("A comma-separated list of fully qualified data source register
class names for which" +
+ " StreamWriteSupport is disabled. Writes to these sources will faill
back to the V1 Sink.")
--- End diff --
nit. `faill` -> `fail`
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