Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/14712#discussion_r75548186
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala ---
@@ -168,6 +170,57 @@ class StatisticsSuite extends QueryTest with
TestHiveSingleton with SQLTestUtils
TableIdentifier("tempTable"), ignoreIfNotExists = true, purge =
false)
}
+ test("generate table-level statistics") {
+ def checkTableStats(
+ statsSeq: Seq[Statistics],
+ sizeInBytes: Int,
+ estimatedSize: Int,
+ rowCount: Int): Unit = {
+ assert(statsSeq.size === 1)
+ assert(statsSeq.head.sizeInBytes === BigInt(sizeInBytes))
+ assert(statsSeq.head.estimatedSize === Some(BigInt(estimatedSize)))
+ assert(statsSeq.head.rowCount === Some(BigInt(rowCount)))
+ }
+
+ sql("CREATE TABLE analyzeTable (key STRING, value STRING)").collect()
+ sql("CREATE TABLE parquetTable (key STRING, value STRING) STORED AS
PARQUET").collect()
+ sql("CREATE TABLE orcTable (key STRING, value STRING) STORED AS
ORC").collect()
+
+ sql("INSERT INTO TABLE analyzeTable SELECT * FROM src").collect()
+ sql("INSERT INTO TABLE parquetTable SELECT * FROM src").collect()
+ sql("INSERT INTO TABLE orcTable SELECT * FROM src").collect()
+ sql("INSERT INTO TABLE orcTable SELECT * FROM src").collect()
+
+ sql("ANALYZE TABLE analyzeTable COMPUTE STATISTICS")
--- End diff --
Before calling `ANALYZE TABLE`, table properties already have the latest
values of `numFiles` and `totalSize`. Thus, `totalSize` is not added/updated by
`ANALYZE TABLE`.
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