webber created SPARK-26291:
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Summary: how to get the number of rows when i write or read use
datasourceV2
Key: SPARK-26291
URL: https://issues.apache.org/jira/browse/SPARK-26291
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.4.0
Reporter: webber
Fix For: 2.4.0
how to get the number of rows when i write or read on external data storage by
java datasourceV2 simplely. Now， when i read from a external data storage to
show, i get a dataset, i need to do dataset.count to get the number. when i
write to a external data storage, i need to do writer.save, and then i have to
do dataset.count to get the number too. How can i count the number In the
process of writer, but _additional dataset.count_
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