toJuliaDF.md

toJuliaDF Function

Move Spark data into a new Julia DataFrame.

Arguments

• ds:Dataset: the Apache Spark Dataset to import into Julia as a DataFrame.

Data Types

The function supports the following data types when creating Julia DataFrames from Spark data:

• String
• Date
• Timestamp
• integer
• long
• double
• float
• decimal
• boolean

Additional Requirements

You must include the DataFrames package in your Julia program.

Using DataFrames

Include the "Dates" and "Decimals" packages if your Spark data contains dates or decimal numbers.

Using Dates, Decimals

Examples

stmt = sql(session, "SELECT _c0 AS columnName1, _c1 AS columnName2 FROM CSV.`/pathToFile/fileName.csv`")
createOrReplaceTempView(stmt, "TempViewName")
sqlQuery = sql(session, "SELECT columnName1, columnName2 FROM TempViewName;")
juliaDataFrame = toJuliaDF(sqlQuery)