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Mastering Apache Cassandra 3.x - Third Edition
book

Mastering Apache Cassandra 3.x - Third Edition

by Aaron Ploetz, Tejaswi Malepati
October 2018
Beginner to intermediate content levelBeginner to intermediate
348 pages
10h
English
Packt Publishing
Content preview from Mastering Apache Cassandra 3.x - Third Edition

Accessing Cassandra data

Once the configuration is all set, we import the table to local. We then register it as a table locally, so that any kind of queries can be run. The commands are as follows:

# Import to locallycass_df <- sparklyr:::spark_data_read_generic(  sc, "org.apache.spark.sql.cassandra", "format",  list(keyspace = "system_auth", table = "roles")  ) %>%  invoke("load")# Register as a tablecass_tbl <- sparklyr:::spark_partition_register_df(         sc, cass_df, name = "roles", repartition = 0, memory = TRUE)View(cass_tbl)

The following is a screenshot of RStudio on macOS. The bottom-left screen shows the CLI's way of displaying the roles table data. If you need a cleaner display, you can click the table icon on the right end of roles, at ...

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Publisher Resources

ISBN: 9781789131499Supplemental Content