Sachin Tyagi questions

Sachin Tyagi answers

• How to return complex types using spark UDFs
• Spark cache vs broadcast
• Performance Of Joins in Spark-SQL
• Inferring Spark DataType from string literals
• Is reading a CSV file from S3 into a Spark dataframe expected to be so slow?
• Parallelize / avoid foreach loop in spark
• Spark Transformation - Why is it lazy and what is the advantage?
• how to filter out a null value from spark dataframe