Unable to infer schema when loading Parquet file
The documentation for parquet says the format is self describing, and the full schema was available when the parquet file was saved. What gives? Using Spark 2.1.1. Also fails in 2.2.0. …
Inspect Parquet from command line - Stack Overflow
How do I inspect the content of a Parquet file from the command line? The only option I see now is $ hadoop fs -get my-path local-file $ parquet-tools head local-file | less I would like to avoid
How can I write a parquet file using Spark (pyspark)?
I'm pretty new in Spark and I've been trying to convert a Dataframe to a parquet file in Spark but I haven't had success yet. The documentation says that I can use write.parquet function to …
How to read a Parquet file into Pandas DataFrame?
How to read a modestly sized Parquet data-set into an in-memory Pandas DataFrame without setting up a cluster computing infrastructure such as Hadoop or Spark? This is only a …
What are the pros and cons of the Apache Parquet format …
Apr 24, 2016 · 30,36,2 Parquet files are most commonly compressed with the Snappy compression algorithm. Snappy compressed files are splittable and quick to inflate. Big data …
indexing - Index in Parquet - Stack Overflow
Basically Parquet has added two new structures in parquet layout - Column Index and Offset Index. Below is a more detailed technical explanation what it solves and how. Problem …
How to view Apache Parquet file in Windows? - Stack Overflow
Jun 19, 2018 · 98 What is Apache Parquet? Apache Parquet is a binary file format that stores data in a columnar fashion. Data inside a Parquet file is similar to an RDBMS style table where …
Methods for writing Parquet files using Python? - Stack Overflow
Oct 5, 2015 · I'm having trouble finding a library that allows Parquet files to be written using Python. Bonus points if I can use Snappy or a similar compression mechanism in conjunction …
Convert csv to parquet file using python - Stack Overflow
May 30, 2018 · I am trying to convert a .csv file to a .parquet file. The csv file (Temp.csv) has the following format 1,Jon,Doe,Denver I am using the following python code to convert it into …
How to append data to an existing parquet file - Stack Overflow
Aug 31, 2016 · Parquet is a columnar file, It optimizes writing all columns together. If any edit it requires to rewrite the file. From Wiki A column-oriented database serializes all of the values of …