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https://issues.apache.org/jira/browse/HUDI-3214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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sivabalan narayanan updated HUDI-3214:
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Sprint: Cont' improve - 2022/02/07
> [UMBRELLA] optimize auto partition in spark
> -------------------------------------------
>
> Key: HUDI-3214
> URL: https://issues.apache.org/jira/browse/HUDI-3214
> Project: Apache Hudi
> Issue Type: Improvement
> Components: spark, writer-core
> Reporter: Yann Byron
> Assignee: Yann Byron
> Priority: Critical
> Fix For: 0.11.0
>
>
> recently, if partition's value has the format like
> "pt1=xxxx/pt2=yyyy/pt3=zzzz" which split by slash, Hudi will partition
> automatically. The directory of this table will have multi partition
> structure.
> I think it's unpredictable. So create this umbrella task to optimize auto
> partition in order to make the behavior more reasonable.
> Also, in hudi 0.8, schama will hold `pt1`, `pt2`, `pt3`, but not in 0.9+.
> There are a few of sub tasks:
> * add a flag to control whether enable auto-partition, to make the default
> behavior reasonable..
> * achieve a new key generator designed specifically for this scenario.
> * solve the bug about the different schema when enable
> *hoodie.file.index.enable* or not in this case.
>
> Test Codes:
> {code:java}
> import org.apache.hudi.QuickstartUtils._
> import scala.collection.JavaConversions._
> import org.apache.spark.sql.SaveMode._
> import org.apache.hudi.DataSourceReadOptions._
> import org.apache.hudi.DataSourceWriteOptions._
> import org.apache.hudi.config.HoodieWriteConfig._
> val tableName = "hudi_trips_cow"
> val basePath = "file:///tmp/hudi_trips_cow"
> val dataGen = new DataGenerator
> val inserts = convertToStringList(dataGen.generateInserts(10))
> val df = spark.read.json(spark.sparkContext.parallelize(inserts, 2))
> val newDf = df.withColumn("partitionpath", regexp_replace($"partitionpath",
> "(.*)(\\/){1}(.*)(\\/){1}", "continent=$1$2country=$3$4city="))
> newDf.write.format("hudi").
> options(getQuickstartWriteConfigs).
> option(PRECOMBINE_FIELD_OPT_KEY, "ts").
> option(RECORDKEY_FIELD_OPT_KEY, "uuid").
> option(PARTITIONPATH_FIELD_OPT_KEY, "partitionpath").
> option(TABLE_NAME, tableName).
> mode(Overwrite).
> save(basePath) {code}
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