library(sparklyr)
sc <- spark_connect(
master = "local",
config = list(
`sparklyr.shell.driver-class-path` = "/usr/share/java/mysql-connector-java-8.0.25.jar"
)
)
spark_read_jdbc(
sc,
name = "my_sql_table",
options = list(
url = "jdbc:mysql://localhost:3306/my_sql_schema",
driver = "com.mysql.jdbc.Driver",
user = "me",
password = "******",
dbtable = "my_sql_table"
)
) Read from JDBC connection into a Spark DataFrame.
R/data_interface.R
spark_read_jdbc
Description
Read from JDBC connection into a Spark DataFrame.
Usage
spark_read_jdbc(
sc,
name,
options = list(),
repartition = 0,
memory = TRUE,
overwrite = TRUE,
columns = NULL,
...
) Arguments
| Arguments | Description |
|---|---|
| sc | A spark_connection. |
| name | The name to assign to the newly generated table. |
| options | A list of strings with additional options. See https://spark.apache.org/docs/latest/sql-programming-guide.html#configuration. |
| 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? |
| columns | A vector of column names or a named vector of column types. If specified, the elements can be "binary" for BinaryType, "boolean" for BooleanType, "byte" for ByteType, "integer" for IntegerType, "integer64" for LongType, "double" for DoubleType, "character" for StringType, "timestamp" for TimestampType and "date" for DateType. |
| … | Optional arguments; currently unused. |
Examples
See Also
Other Spark serialization routines: collect_from_rds(), spark_insert_table(), spark_load_table(), spark_read_avro(), spark_read_binary(), spark_read_csv(), spark_read_delta(), spark_read_image(), spark_read_json(), spark_read_libsvm(), spark_read_orc(), spark_read_parquet(), spark_read_source(), spark_read_table(), spark_read_text(), spark_read(), spark_save_table(), spark_write_avro(), spark_write_csv(), spark_write_delta(), spark_write_jdbc(), spark_write_json(), spark_write_orc(), spark_write_parquet(), spark_write_source(), spark_write_table(), spark_write_text()