abstract class ColumnarOutputWriterFactory extends Serializable
A factory that produces ColumnarOutputWriters. A new ColumnarOutputWriterFactory is
created on the driver side, and then gets serialized to executor side to create
ColumnarOutputWriters. This is the columnar version of
org.apache.spark.sql.execution.datasources.OutputWriterFactory.
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- new ColumnarOutputWriterFactory()
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abstract
def
getFileExtension(context: TaskAttemptContext): String
Returns the file extension to be used when writing files out.
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def
newInstance(path: String, dataSchema: StructType, context: TaskAttemptContext): ColumnarOutputWriter
When writing to a
org.apache.spark.sql.execution.datasources.HadoopFsRelation, this method gets called by each task on executor side to instantiate new ColumnarOutputWriters.When writing to a
org.apache.spark.sql.execution.datasources.HadoopFsRelation, this method gets called by each task on executor side to instantiate new ColumnarOutputWriters.- path
Path to write the file.
- dataSchema
Schema of the columnar data to be written. Partition columns are not included in the schema if the relation being written is partitioned.
- context
The Hadoop MapReduce task context.
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def
partitionFlushSize(context: TaskAttemptContext): Long
Returns the default partition flush size in bytes, format specific
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