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  1. Spark
  2. SPARK-16401

Data Source APIs: Extending RelationProvider and CreatableRelationProvider Without SchemaRelationProvider

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Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • 2.0.0
    • 2.0.0
    • SQL
    • None

    Description

      When users try to implement a data source API with extending only RelationProvider and CreatableRelationProvider, they will hit an error when resolving the relation.

      spark.read
.format("org.apache.spark.sql.test.DefaultSourceWithoutUserSpecifiedSchema")
  .load()
  .write.
format("org.apache.spark.sql.test.DefaultSourceWithoutUserSpecifiedSchema")
  .save()

      The error they hit is like

      xyzDataSource does not allow user-specified schemas.;
org.apache.spark.sql.AnalysisException: xyzDataSource does not allow user-specified schemas.;
	at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:319)
	at org.apache.spark.sql.execution.datasources.DataSource.write(DataSource.scala:494)
	at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:211)

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            smilegator Xiao Li
            smilegator Xiao Li
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            Dates

              Created:
              Updated:
              Resolved: