pyspark.sql Module

A pyspark.sql Module is a Spark SQL PySpark module.

• Context:
  • It can contain:
    • a pyspark.sql.types module
    • a pyspark.sql.functions module
• Counter-Example(s):
  • pyspark.streaming.
  • pyspark.ml.
  • pyspark.mllib.
• See: pyspark, s3a, SparkContext.

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References

2017

• https://spark.apache.org/docs/2.2.0/sql-programming-guide.html
  • QUOTE: All data types of Spark SQL are located in the package of pyspark.sql.types. You can access them by doing
    from pyspark.sql.types import *

2017

• http://spark.apache.org/docs/2.2.0/api/python/pyspark.sql.html
  • QUOTE:
    class pyspark.sql.SQLContext(sparkContext, sqlContext=None)
    Main entry point for Spark SQL functionality.
    • A SQLContext can be used create DataFrame, register DataFrame as tables, execute SQL over tables, cache tables, and read parquet files.
  • Parameters:
    • sparkContext – The SparkContext backing this SQLContext.
    • sqlContext – An optional JVM Scala SQLContext. If set, we do not instantiate a new SQLContext in the JVM, instead we make all calls to this object.

2017

• http://spark.apache.org/docs/2.2.0/api/python/pyspark.sql.html

       pyspark.sql.SparkSession Main entry point for DataFrame and SQL functionality.
       pyspark.sql.DataFrame A distributed collection of data grouped into named columns.
       pyspark.sql.Column A column expression in a DataFrame.
       pyspark.sql.Row A row of data in a DataFrame.
       pyspark.sql.GroupedData Aggregation methods, returned by DataFrame.groupBy().
       pyspark.sql.DataFrameNaFunctions Methods for handling missing data (null values).
       pyspark.sql.DataFrameStatFunctions Methods for statistics functionality.
       pyspark.sql.functions List of built-in functions available for DataFrame.
       pyspark.sql.types List of data types available.
       pyspark.sql.Window For working with window functions.

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