Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18421#discussion_r131993682
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala ---
@@ -256,6 +257,201 @@ 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
+ }
+
+ def createPartition(ds: String, query: String): Unit = {
+ sql(s"INSERT INTO TABLE $tableName PARTITION (ds='$ds') $query")
+ }
+
+ withTable(tableName) {
+ sql(s"CREATE TABLE $tableName (key STRING, value STRING) PARTITIONED
BY (ds STRING)")
+
+ createPartition("2010-01-01", "SELECT '1', 'A' from src")
+ createPartition("2010-01-02", "SELECT '1', 'A' from src UNION ALL
SELECT '1', 'A' from src")
+ createPartition("2010-01-03", "SELECT '1', 'A' from src")
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-01') COMPUTE
STATISTICS NOSCAN")
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-02') COMPUTE
STATISTICS NOSCAN")
+
+ assert(queryStats("2010-01-01").rowCount === None)
+ assert(queryStats("2010-01-01").sizeInBytes === 2000)
+
+ assert(queryStats("2010-01-02").rowCount === None)
+ assert(queryStats("2010-01-02").sizeInBytes === 2*2000)
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-01') COMPUTE
STATISTICS")
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-02') COMPUTE
STATISTICS")
+
+ assert(queryStats("2010-01-01").rowCount.get === 500)
+ assert(queryStats("2010-01-01").sizeInBytes === 2000)
+
+ assert(queryStats("2010-01-02").rowCount.get === 2*500)
+ assert(queryStats("2010-01-02").sizeInBytes === 2*2000)
+ }
+ }
+
+ 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 assertPartitionStats(
+ ds: String,
+ hr: String,
+ rowCount: Option[BigInt],
+ sizeInBytes: BigInt): Unit = {
+ val stats = queryStats(ds, hr).get
+ assert(stats.rowCount === rowCount)
+ assert(stats.sizeInBytes === sizeInBytes)
+ }
+
+ def createPartition(ds: String, hr: Int, query: String): Unit = {
+ sql(s"INSERT INTO TABLE $tableName PARTITION (ds='$ds', hr=$hr)
$query")
+ }
+
+ withTable(tableName) {
+ sql(s"CREATE TABLE $tableName (key STRING, value STRING) PARTITIONED
BY (ds STRING, hr INT)")
+
+ createPartition("2010-01-01", 10, "SELECT '1', 'A' from src")
+ createPartition("2010-01-01", 11, "SELECT '1', 'A' from src")
+ createPartition("2010-01-02", 10, "SELECT '1', 'A' from src")
+ createPartition("2010-01-02", 11,
+ "SELECT '1', 'A' from src UNION ALL SELECT '1', 'A' from src")
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-01') COMPUTE
STATISTICS NOSCAN")
+
+ assertPartitionStats("2010-01-01", "10", rowCount = None,
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-01", "11", rowCount = None,
sizeInBytes = 2000)
+ assert(queryStats("2010-01-02", "10") === None)
+ assert(queryStats("2010-01-02", "11") === None)
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-02') COMPUTE
STATISTICS NOSCAN")
+
+ assertPartitionStats("2010-01-01", "10", rowCount = None,
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-01", "11", rowCount = None,
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-02", "10", rowCount = None,
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-02", "11", rowCount = None,
sizeInBytes = 2*2000)
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-01') COMPUTE
STATISTICS")
+
+ assertPartitionStats("2010-01-01", "10", rowCount = Some(500),
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-01", "11", rowCount = Some(500),
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-02", "10", rowCount = None,
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-02", "11", rowCount = None,
sizeInBytes = 2*2000)
+
+ sql(s"ANALYZE TABLE $tableName PARTITION (ds='2010-01-02') COMPUTE
STATISTICS")
+
+ assertPartitionStats("2010-01-01", "10", rowCount = Some(500),
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-01", "11", rowCount = Some(500),
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-02", "10", rowCount = Some(500),
sizeInBytes = 2000)
+ assertPartitionStats("2010-01-02", "11", rowCount = Some(2*500),
sizeInBytes = 2*2000)
+ }
--- End diff --
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