Github user mbasmanova commented on a diff in the pull request:
https://github.com/apache/spark/pull/18421#discussion_r125763666
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala ---
@@ -201,6 +202,193 @@ class StatisticsSuite extends
StatisticsCollectionTestBase with TestHiveSingleto
}
}
+ test("analyze single partition") {
+ val tableName = "analyzeTable_part"
+
+ def queryStats(ds: String): CatalogStatistics = {
+ val partition =
+
spark.sessionState.catalog.getPartition(TableIdentifier(tableName), Map("ds" ->
ds))
+ partition.stats.get
+ }
+
+ withTable(tableName) {
+ sql(s"CREATE TABLE $tableName (key STRING, value STRING) PARTITIONED
BY (ds STRING)")
+
+ sql(s"INSERT INTO TABLE $tableName PARTITION (ds='2010-01-01')
SELECT * FROM src")
+ sql(
+ s"""
+ |INSERT INTO TABLE $tableName PARTITION (ds='2010-01-02')
+ |SELECT * FROM src
+ |UNION ALL
+ |SELECT * FROM src
+ """.stripMargin)
+ sql(s"INSERT INTO TABLE $tableName PARTITION (ds='2010-01-03')
SELECT * FROM src")
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-01') COMPUTE
STATISTICS").collect()
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-02') COMPUTE
STATISTICS").collect()
+
+ assert(queryStats("2010-01-01").rowCount.get === 500)
+ assert(queryStats("2010-01-01").sizeInBytes === 5812)
+
+ assert(queryStats("2010-01-02").rowCount.get === 2*500)
+ assert(queryStats("2010-01-02").sizeInBytes === 2*5812)
+ }
+ }
+
+ test("analyze single partition noscan") {
+ val tableName = "analyzeTable_part"
+
+ def queryStats(ds: String): CatalogStatistics = {
+ val partition =
+
spark.sessionState.catalog.getPartition(TableIdentifier(tableName), Map("ds" ->
ds))
+ partition.stats.get
+ }
+
+ withTable(tableName) {
+ sql(s"CREATE TABLE $tableName (key STRING, value STRING) PARTITIONED
BY (ds STRING)")
+
+ sql(s"INSERT INTO TABLE $tableName PARTITION (ds='2010-01-01')
SELECT * FROM src")
+ sql(
+ s"""
+ |INSERT INTO TABLE $tableName PARTITION (ds='2010-01-02')
+ |SELECT * FROM src
+ |UNION ALL
+ |SELECT * FROM src
+ """.stripMargin)
+ sql(s"INSERT INTO TABLE $tableName PARTITION (ds='2010-01-03')
SELECT * FROM src")
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-01') COMPUTE
STATISTICS NOSCAN")
+ .collect()
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-02') COMPUTE
STATISTICS NOSCAN")
+ .collect()
+
+ assert(queryStats("2010-01-01").rowCount === None)
+ assert(queryStats("2010-01-01").sizeInBytes === 5812)
+
+ assert(queryStats("2010-01-02").rowCount === None)
+ assert(queryStats("2010-01-02").sizeInBytes === 2*5812)
+ }
+ }
+
+ test("analyze a set of partitions") {
+ val tableName = "analyzeTable_part"
+
+ def queryStats(ds: String, hr: String): Option[CatalogStatistics] = {
+ val tableId = TableIdentifier(tableName)
+ val partition =
+ spark.sessionState.catalog.getPartition(tableId, Map("ds" -> ds,
"hr" -> hr))
+ partition.stats
+ }
+
+ def assertStats(ds: String, hr: String, rowCount: BigInt, sizeInBytes:
BigInt): Unit = {
+ val stats = queryStats(ds, hr).get
+ assert(stats.rowCount === Some(rowCount))
+ assert(stats.sizeInBytes === sizeInBytes)
+ }
+
+ def assertNoStats(ds: String, hr: String): Unit = {
+ assert(queryStats(ds, hr) === None)
+ }
+
+ def createPartition(ds: String, hr: Int, query: String): Unit = {
--- End diff --
I created this method to make the test code more concise. For example, this
method helps avoid multi-line methods calls like this:
sql(
s"""
|INSERT INTO TABLE $tableName PARTITION (ds='2010-01-02', hr=11)
|SELECT * FROM src
|UNION ALL
|SELECT * FROM src
""".stripMargin)
becomes
createPartition("2010-01-02", 11, "SELECT * FROM SRC UNION ALL SELECT *
FROM SRC")
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