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import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder | |
import org.apache.spark.sql.expressions.Aggregator | |
import org.apache.spark.sql.{Encoder,Row} | |
import org.apache.spark.sql.functions._ | |
import java.util.Calendar | |
import sqlContext.implicits._ | |
case class C1(f1: String, f2: String, f3: String, f4:java.sql.Date, f5: Double) | |
case class C2(f2:String, seqC1:Seq[C1]) | |
case class C3(f2:String, seqOfSeqC1:Seq[Seq[C1]]) | |
val teams = sc.parallelize(Seq( | |
C1("hash1", "NLC", "Cubs", java.sql.Date.valueOf("2016-01-23"), 3253.21), | |
C1("hash2", "NLC", "Cardinals", java.sql.Date.valueOf("2014-01-23"), 353.88), | |
C1("hash2", "NLC", "Pirates", java.sql.Date.valueOf("2014-01-23"), 275.66), | |
C1("hash2", "NLC", "Reds", java.sql.Date.valueOf("2014-01-23"), 583.84), | |
C1("hash2", "NLC", "Brewers", java.sql.Date.valueOf("2014-01-23"), 349.12), | |
C1("hash3", "NLW", "Dodgers", java.sql.Date.valueOf("2013-08-15"), 4322.12), | |
C1("hash4", "NLE", "Red Sox", java.sql.Date.valueOf("2010-03-14"), 10283.72) | |
)).toDS | |
val groupDS=teams.groupBy(_.f2).mapGroups( (k, vals) => { | |
val c1Seq = vals.toSeq | |
val first = c1Seq.last | |
C3(first.f1, List(c1Seq, c1Seq)) | |
}) | |
groupDS | |
groupDS.toDF.write.parquet("test") | |
val ds = sqlContext.read.parquet("test").as[C3] | |
val gdf = groupDS.toDF | |
gdf.show |
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