Github user lianhuiwang commented on a diff in the pull request:
https://github.com/apache/spark/pull/18205#discussion_r121275665
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/PruneFileSourcePartitionsSuite.scala
---
@@ -66,4 +67,35 @@ class PruneFileSourcePartitionsSuite extends QueryTest
with SQLTestUtils with Te
}
}
}
+
+ test("SPARK-20986 Reset table's statistics after
PruneFileSourcePartitions rule") {
+ withTempView("tempTbl") {
+ withTable("partTbl") {
+
spark.range(1000).selectExpr("id").createOrReplaceTempView("tempTbl")
+ sql("CREATE TABLE partTbl (id INT) PARTITIONED BY (part INT)
STORED AS parquet")
+ for (part <- Seq(1, 2, 3)) {
+ sql(
+ s"""
+ |INSERT OVERWRITE TABLE partTbl PARTITION (part='$part')
+ |select id from tempTbl
+ """.stripMargin)
+ }
+
+ withSQLConf(SQLConf.ENABLE_FALL_BACK_TO_HDFS_FOR_STATS.key ->
"true") {
+ val df = sql("SELECT * FROM partTbl where part = 1")
+ val query = df.queryExecution.analyzed.analyze
+ val sizes1 = query.collect {
+ case relation: LogicalRelation =>
relation.computeStats(conf).sizeInBytes
+ }
+ assert(sizes1.size === 1, s"Size wrong for:\n
${df.queryExecution}")
+ assert(sizes1(0) > 5000, s"expected > 5000 for test table 'src',
got: ${sizes1(0)}")
+ val sizes2 = Optimize.execute(query).collect {
+ case relation: LogicalRelation =>
relation.computeStats(conf).sizeInBytes
+ }
+ assert(sizes2.size === 1, s"Size wrong for:\n
${df.queryExecution}")
--- End diff --
I donot think that it have changed the stats of catalog. after the
optimizer, the size in catalog stats is larger than
computeStats(conf).sizeInBytes because the partition pruned.
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