aokolnychyi commented on a change in pull request #23171: [SPARK-26205][SQL]
Optimize InSet Expression for bytes, shorts, ints, dates
URL: https://github.com/apache/spark/pull/23171#discussion_r262151097
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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@@ -171,6 +171,16 @@ object SQLConf {
.intConf
.createWithDefault(10)
+ val OPTIMIZER_INSET_SWITCH_THRESHOLD =
+ buildConf("spark.sql.optimizer.inSetSwitchThreshold")
+ .internal()
+ .doc("Configures the max set size in InSet for which Spark will generate
code with " +
+ "switch statements. This is applicable only to bytes, shorts, ints,
dates.")
+ .intConf
+ .checkValue(threshold => threshold >= 0 && threshold <= 600, "The max
set size " +
+ "for using switch statements in InSet must be positive and less than
or equal to 600")
Review comment:
Yeah, I've started with `threshold > 0` but then changed it to `threshold >=
0` and forgot to update the description. I kept 0 as a possible value to ensure
we can disable this optimization if needed. Do you think it makes sense or
shall we require `threshold > 0`?
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