Metadata-Version: 1.0
Name: SparkSafeDelta
Version: 0.3.4
Summary: Combination of tools that allow more convenient use of PySpark within Azure DataBricks environment.
Home-page: http://pypi.python.org/pypi/SparkSafeDelta/
Author: Aleksandrs Krivickis
Author-email: aleksandrs.krivickis@gmail.com
License: LICENSE.txt
Description: # Spark Safe Delta
            Combination of tools that allow more convenient use of PySpark within Azure DataBricks environment.
        
        ## I. Package contents:
        ### 1.delta_write_safe
            Tool that allows to automatically update schema of DataBricks Delta in case of Changes in data structure
        
        ### 2.write_data_mysql
            Method writes data into MySQL and takes care of repartitioning in case if it's necessary.
        
        Dependencies:
           
            1. MySQL connector Java 8_0_13
            dbfs:/FileStore/jars/7b863f06_67cf_4a51_8f3b_67d414d808b3-Barnymysql_connector_java_8_0_13_4ac45-2f7c7.jar
            
            http://dev.mysql.com/doc/connector-j/en/
            https://mvnrepository.com/artifact/mysql/mysql-connector-java
        
        By default, it relies on constant variables outside of method that define MySQL credentials, that can be also specified as a parameters:
        
            * MYSQL_URL
            * MYSQL_DRIVER
            * MYSQL_USER
            * MYSQL_PASSWORD
            * MYSQL_SSL_CA_PATH
            * MYSQL_QUERY_TIMEOUT
        
        Method Parameters:
        
            * p_spark_dataframe - dataframe to write
            * p_mysql_db_name - name of database to write to
            * p_mysql_table_name - name of table to write to
            * p_num_partitions - amount of partitions, if -1, runs with default amount of partitions defined in spark environment or specific delta
        
        Method default parameters:
        
            p_num_partitions=-1
            url=MYSQL_URL,
            driver=MYSQL_DRIVER,
            user=MYSQL_USER,
            password=MYSQL_PASSWORD,
            ssl_ca=MYSQL_SSL_CA_PATH,
            queryTimeout=MYSQL_QUERY_TIMEOUT
        
        Usage example:
        
            #MySQL settings defined outside of a method below:
            MYSQL_DRIVER = "com.mysql.jdbc.Driver"
            MYSQL_URL = "jdbc:mysql://hostname:port/database?useUnicode=true&characterEncoding=utf-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false"
            MYSQL_QUERY_TIMEOUT = 0
            
            MYSQL_USER = "user@namespace"
            MYSQL_PASSWORD = "example_password"
            MYSQL_SSL_CA_PATH = "/mnt/alex-experiments-blob/certs/cert.txt"
            
            #Method execution itself
            write_data_mysql(p_spark_dataframe=target_data, p_mysql_dbtable=destination_db_name_column_name_construct)
        
        ### 3.remove_columns
        
            remove_columns() method removes columns from a specified dataframe.
            It will silently return a result even if user specifies column that doesn't exist.
            Usage example: destination_df = remove_columns(source_df, "SequenceNumber;Body;Non-existng-column")
        
        ### 4.read_mysql
        
            Method allows fetch the table, or a query as a Spark DataFrame.
            Returnws Spark DataFrame as a result.
        
            # Example usage:
            read_mysql(table_name=customers)
            read_mysql(table_name=h2.customers)
            read_mysql(table_name=h2.customers, url=MYSQL_URL, driver=MYSQL_DRIVER, user=MYSQL_USER, password=MYSQL_PASSWORD, ssl_ca=MYSQL_SSL_CA_PATH, queryTimeout=MYSQL_QUERY_TIMEOUT)
        
        ### 4.list_available_mysql_tables
        
            Method allows to list all the tables that available to a particular user.
            Returnws Spark DataFrame as a result
        
        
        ## Package sample usage:
        
            #!/usr/bin/env python
            
            from sparksafedelta import sparksafedelta
            sparksafedelta.delta_write_safe(sp_df_to_write, SP_CONTEXT, DATABRICKS_TABLE_NAME)
        
Platform: UNKNOWN
