Read a tabular data file into a Spark DataFrame.

spark_read_csv(sc, name, path, header = TRUE, columns = NULL,
  infer_schema = TRUE, delimiter = ",", quote = "\"", escape = "\\",
  charset = "UTF-8", null_value = NULL, options = list(),
  repartition = 0, memory = TRUE, overwrite = TRUE)

Arguments

sc

A spark_connection.

name

The name to assign to the newly generated table.

path

The path to the file. Needs to be accessible from the cluster. Supports the "hdfs://", "s3n://" and "file://" protocols.

header

Boolean; should the first row of data be used as a header? Defaults to TRUE.

columns

A vector of column names or a named vector of column types.

infer_schema

Boolean; should column types be automatically inferred? Requires one extra pass over the data. Defaults to TRUE.

delimiter

The character used to delimit each column. Defaults to ','.

quote

The character used as a quote. Defaults to '"'.

escape

The character used to escape other characters. Defaults to '\'.

charset

The character set. Defaults to "UTF-8".

null_value

The character to use for null, or missing, values. Defaults to NULL.

options

A list of strings with additional options.

repartition

The number of partitions used to distribute the generated table. Use 0 (the default) to avoid partitioning.

memory

Boolean; should the data be loaded eagerly into memory? (That is, should the table be cached?)

overwrite

Boolean; overwrite the table with the given name if it already exists?

Details

You can read data from HDFS (hdfs://), S3 (s3n://), as well as the local file system (file://).

If you are reading from a secure S3 bucket be sure that the AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables are both defined.

When header is FALSE, the column names are generated with a V prefix; e.g. V1, V2, ....

See also

Other Spark serialization routines: spark_load_table, spark_read_jdbc, spark_read_json, spark_read_parquet, spark_read_table, spark_save_table, spark_write_csv, spark_write_json, spark_write_parquet, spark_write_table