gengliangwang commented on code in PR #56133:
URL: https://github.com/apache/spark/pull/56133#discussion_r3315381729
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sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
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@@ -3504,6 +3445,17 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val STREAMING_V2_PRUNE_COLUMNS_ENABLED =
Review Comment:
why do we need a new conf here? will there be regressions?
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
##########
@@ -3504,6 +3445,17 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val STREAMING_V2_PRUNE_COLUMNS_ENABLED =
+ buildConf("spark.sql.streaming.v2.pruneColumns.enabled")
+ .internal()
+ .doc("When true, pruneColumns is called on V2 streaming scan builders
that implement " +
+ "SupportsPushDownRequiredColumns. This communicates metadata columns
to the scan " +
+ "builder so they appear in readSchema(). Disable if a connector's
pruneColumns " +
+ "implementation is not compatible with being called in the streaming
path.")
+ .withBindingPolicy(ConfigBindingPolicy.SESSION)
Review Comment:
why do we need this line?
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