I'm having an issue where I'm connecting to a local Cassandra DB using Python Cassandra Driver. Issue is, there will intermittently be an issue where my CREATE TABLE queries are not being executed.
There is also an issue where I can see the table via DESC table in CQLSH, but upon execution of a SELECT query, it tells me that the table doesn't exist.
Restarting my virtual machine where my Cassandra is installed seems to fix this for awhile.
What is the cause of this and how do I fix it?
Related
What Happened
After moving my Django app - which was working as expected - from a VPS to shared hosting with Cpanel I changed Database from PostgresSQL to MySQL, whenever I open an object that has created_at field which is a Datetime Field I Get this error.
Error
Database returned an invalid datetime value. Are time zone definitions for your database installed?
What I've tried
After some searching, I've found out that it can be fixed by running this command in terminal
mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root -p mysql
That command should populate the Timezone tables in my database.
The Problem
I can't run the comment mentioned above as am using Cpanel shared hosting and am very limited on my choices and commands that I can run using terminal. so I tried to run it I got this error
What I need
I think the solution now is to find a way to populate the timezone tables on the Mysql database using only PhpMyAdmin and not using the terminal
Interestingly this error is addressed in Django's docs,
I get an error “Are time zone definitions for your database installed?”
If you are using MySQL, see the Time zone definitions section of the MySQL notes for instructions on loading time zone definitions.
once we check inside the Time zone definitions, we read
If you plan on using Django’s timezone support, use mysql_tzinfo_to_sql to load time zone tables into the MySQL database. This needs to be done just once for your MySQL server, not per database.
Knowing that OP can run that, I'd get in touch with the hosting provider to do that.
There may be an easier way but I am trying to connect to a MySQL database to be able to query with python.
This is my current code:
And these are the packages I have installed.
I am using pycharm and I have connected to the database through there but I need to be able to query code with python.
I found an easier way to connect to my server. I just followed the steps from w3schools. https://www.w3schools.com/python/python_mysql_getstarted.asp
I'm in the process of restoring a mysql database. I am trying to loop through the mysql tables and discard each table's tablespace so i can replace it with the old .ibd file. What is the proper Python code to use to accomplish the
ALTER TABLE <table> DISCARD TABLESPACE
for each table in the database using a Python script? I'm using Python 3 with mysql 8.0
Thanks
~brohjoe
The first you need for connect to a database is a thing named connector, on your case you need a connector for language python and version 8.0 of MySQL on this case you need download the connector from here: https://dev.mysql.com/downloads/connector/python/
For install a connector: https://dev.mysql.com/doc/connector-python/en/connector-python-installation-binary.html
When you have installed it, you can start to make connection to database and other things via this documentation references: https://dev.mysql.com/doc/connector-python/en/connector-python-examples.html
Could you please help me with the follwing request
I need to copy records from one oracle db ( production environment) to another ( test environment) using python code.
Oracle db version 11g
Could you help me out.
Check out odo blaze:
http://odo.pydata.org/en/latest/overview.html
It can handle data migration across many different data types and databases
Is there any in memory DB for Python similar to HSQLDB. MySQL is the DB the application uses and for running end to end test cases, we are currently bringing up a clone of actual DB which causes some delay and couple of manual steps.
I have tried SQLite3 facing some trouble with running DDL queries generated for MySQL.
What are the good options for bringing up temporary DB to run all test cases and shut it down after test execution?
Thank you
MySQL has an in-memory engine (https://dev.mysql.com/doc/refman/5.5/en/memory-storage-engine.html). I've never used, but I guess it will help you run the tests quickly.