Nick Jordan created SPARK-24756:
-----------------------------------
Summary: Incorrect Statistics
Key: SPARK-24756
URL: https://issues.apache.org/jira/browse/SPARK-24756
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.3.0
Reporter: Nick Jordan
I'm getting some odd results when looking at the statistics for a simple data
frame:
{code:java}
val df = spark.sparkContext.parallelize(Seq("y")).toDF("y")
df.queryExecution.stringWithStats{code}
{noformat}
== Optimized Logical Plan
== Project [value#7 AS y#9], Statistics(sizeInBytes=8.0 EB, hints=none)
+- SerializeFromObject [staticinvoke(class
org.apache.spark.unsafe.types.UTF8String, StringType, fromString, input[0,
java.lang.String, true], true, false) AS value#7], Statistics(sizeInBytes=8.0
EB, hints=none)
+- ExternalRDD [obj#6], Statistics(sizeInBytes=8.0 EB, hints=none)
{noformat}
8.0 Exabytes is clearly not right here. It is worth noting that if I don't
parallelize the Seq then I get the expected results.
This surfaced when I was running unit tests that verified that a broadcast hint
was preserved which was failing because of the incorrect statistics.
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