I have a requirement to execute an Oracle function from Pyspark Script. Is there any way to execute Oracle functions/procedures without using additional python libraries such as cx_Oracle in Pyspark?
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I'm trying to write a parquet file using pyspark on a windows 10 machine. I have faced issues about winutils and all issue you can get but not found a solution. So my question is : as anyone managed to install pyspark 3.1.2 on windows 10 and run the following code :
from pyspark.sql import Row, SparkSession
spark = SparkSession.builder.getOrCreate()
df = spark.createDataFrame([Row(a=1, b=2.)])
df.write.parquet("test.parquet")
What I have done so far :
Run the latest virtual box windows image from here https://developer.microsoft.com/en-us/windows/downloads/virtual-machines/
Installed python 3.9.7
run pip install pyspark
Added winutils and HADOOP_HOME (I've tested several versions.)
Tried to run the python code above.
It is explicitly said that pyspark can run on all systems Spark runs on both Windows and UNIX-like systems (e.g. Linux, Mac OS) : https://spark.apache.org/docs/latest/ but I did not find anyone who managed to run it.
I manage to do this with the 3.0.1 version without any issue.
I have installed hadoop. I used hadoop-2.7.0-src.tar.gz and hadoop-2.7.0.tar.gz files. And uses apache-maven-3.1.1 to collect the hadoop tar file for windows.
After so many tries I made it run. It was difficult to install hadoop without knowing what I am doing.
Now I want to install Hive. Do I have to collect Hive files with Maven?
If yes what folders should I use to collect them?
And then I want to install sqoop.
Any information is appreciated.
I have not tried on windows but I did on Linux - Ubuntu, and I have detailed these step by step in my blog over here - Hive Install
Have a look, I think most of the steps will be necessary in the same sequence as described but nature of command may be different for windows.
I am using python 3.5 and I want to connect to a PostgreSQL database. What is the best driver to use? I would prefer psycopg2 but it only supports python 3.4 (at least officially).
Would psycopg2 work with python3.5? Where can I get Windows binaries to try it out?
Download: psycopg2-2.6.2.win32-py3.5-pg9.5.3-release.exe from HERE, then run the following in a Windows command prompt:
C:\path\to\project> easy_install /path/to/ psycopg2-2.6.2.win32-py3.5-pg9.5.3-release.exe
Use this wiki as a guide to using psycopg2.
I have multiple different python versions in my laptop and I set up a single node hadoop. Now I am running a pig script (0.12.1) which calls a python streaming script (using REGISTER). How can I control which python version to use? If it is not controllable, which python will be picked up?
I am learning python and using idle. But I wanted to know how I can execute python programs of 2.7 and 3 in the Bash terminal. Is that possible?
I'd like to be able to execute them separately.
I will often type any of the following lines in order to run my programs under the correct version.
python27 path/to/file.py
python3 path/to/file.py
python34 path/to/file.py
This requires that each of those versions be installed.