Stelyus commented on pull request #35233:
URL: https://github.com/apache/spark/pull/35233#issuecomment-1014977463
Tested with:
```
val adselect_raw = spark.createDataFrame(Seq(("imp-1",1),("imp-2",2)))
.cache()
val adselect = adselect_raw.select(
expr("uuid()").alias("userUuid"),
expr("_1").alias("impressionUuid"),
expr("_1").alias("accessDateTime"),
expr("_1").alias("publisher"),
expr("_1").alias("site"),
expr("_1").alias("placement"),
expr("_1").alias("advertiser"),
expr("_1").alias("campaign"),
expr("_1").alias("lineItem"),
expr("_1").alias("creative"),
expr("_1").alias("browserLanguage"),
expr("_1").alias("geoLocode"),
expr("_1").alias("osFamily"),
expr("_1").alias("osName"),
expr("_1").alias("browserName"),
expr("_1").alias("referrerDomain"),
expr("_1").alias("placementIabCategory"),
expr("_1").alias("placementDeviceGroup"),
expr("_1").alias("placementDevice"),
expr("_1").alias("placementVideoType"),
expr("_1").alias("placementSection"),
expr("_1").alias("placementPlayer"),
expr("_1").alias("demandType"),
expr("_1").alias("techCosts"),
expr("_1").alias("mediaCosts"),
expr("_1").alias("directSPrice"),
expr("_1").alias("network"),
expr("_1").alias("deviceSetting"),
expr("_1").alias("placementGroup"),
expr("_1").alias("postalCode"),
expr("_1").alias("householdId")
)
val adcount_raw = spark.createDataFrame(Seq(("imp-1", 1), ("imp-2", 2)))
val adcount = adcount_raw.select(
expr("_1").alias("impressionUuid"),
expr("_2").alias("accessDateTime")
)
val result = adselect.join(adcount, Seq("impressionUuid"))
result.explain()
```
On my side, I get an OOM
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