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Showing posts with the label Postgresql

Pass Column Name As Parameter To Postgresql Using Psycopg2

I'm trying to add columns to a table using psycopg2 row1 below is a list of column names to be … Read more Pass Column Name As Parameter To Postgresql Using Psycopg2

Python Not Calling An External Program Part 3

I have been having problems trying to run an external program from a python program that was genera… Read more Python Not Calling An External Program Part 3

Sqlalchemy Long Running Script: User Was Holding A Relation Lock For Too Long

I have an SQLAlchemy session in a script. The script is running for a long time, and it only fetche… Read more Sqlalchemy Long Running Script: User Was Holding A Relation Lock For Too Long

Flask Many To Many Join As Done By Prefetch_related From Django

I have following Group and Contact model in flask with Sql Alchemy ORM group_contact = db.Table( … Read more Flask Many To Many Join As Done By Prefetch_related From Django

Crafting A Query To Construct A Challenging Django Queryset

I have a Django website where users can make groups and other users then visit the groups to post c… Read more Crafting A Query To Construct A Challenging Django Queryset

'invalid Input Syntax For Type Inet' Db Error In Django App With Postgres And Gunicorn+nginx As Reverse Proxy

Can you help me decipher this rather esoteric error? Everything's fine when I fire up the appli… Read more 'invalid Input Syntax For Type Inet' Db Error In Django App With Postgres And Gunicorn+nginx As Reverse Proxy

Psycopg2 Python Ssl Support Is Not Compiled In

I am trying to connect to my postgres database using psycopg2 with sslmode='required' param… Read more Psycopg2 Python Ssl Support Is Not Compiled In

Psycopg2: Copy Csv Data To Table With Extra Column Values

I am using the copy_expert method in psycopg2 to copy data from a CSV file to a postgresql table. I… Read more Psycopg2: Copy Csv Data To Table With Extra Column Values

How To Db.execute In Postgresql Using The Like Operator With Variables Within Flask

I'm trying to get my db.execute to work but encounter a syntax error when using the LIKE operat… Read more How To Db.execute In Postgresql Using The Like Operator With Variables Within Flask

Converting Pandas Columns To Postgresql List?

I'm working with a CSV of a few hundred columns, many of them are just enumerations, ie: [ [… Read more Converting Pandas Columns To Postgresql List?

Sqlalchemy: Alembic Bulk Insert Fails: 'str' Object Has No Attribute '_autoincrement_column'

My model looks like class Category(UserMixin, db.Model): __tablename__ = 'categories' … Read more Sqlalchemy: Alembic Bulk Insert Fails: 'str' Object Has No Attribute '_autoincrement_column'

Using Postgressql Interval In Sqlalchemy Where The Duration Is Dynamically Stored In Db And Is Not A Parameter

This is not a duplicate of this question, because that question is/can be solved using a parameter … Read more Using Postgressql Interval In Sqlalchemy Where The Duration Is Dynamically Stored In Db And Is Not A Parameter

Sqlalchemy (postgres + Flask ) : How To Sum Multiple Columns?

I have a class Score with a column item_id and several fields having different scores types(score1,… Read more Sqlalchemy (postgres + Flask ) : How To Sum Multiple Columns?

Postgresql Unable To Create Plpythonu Extension

I'm trying to write a function in PostgreSQL on Windows with a Python script in the body and i&… Read more Postgresql Unable To Create Plpythonu Extension

Why Isn't Sqlalchemy Creating Serial Columns?

SQLAlchemy is generating, but not enabling, sequences for columns in postgresql. I suspect I may b… Read more Why Isn't Sqlalchemy Creating Serial Columns?

Connecting Python To A Heroku Postgresql Db?

I am exploring various features of the Python language. I have created a Postgres db on Heroku, am … Read more Connecting Python To A Heroku Postgresql Db?

Deleting From Many-to-many Sql-alchemy And Postgresql

I'm trying to delete a child object from a many-to-many relationship in sql-alchemy. I keep get… Read more Deleting From Many-to-many Sql-alchemy And Postgresql

Syntax Error When Attempting To Insert Data Into Postgresql

I am attempting to insert parsed dta data into a postgresql database with each row being a separate… Read more Syntax Error When Attempting To Insert Data Into Postgresql

Sqlalchemy Duplicated Where Clause To From

I wrote raw query to psql and it's work fine but when i wrote this in sqlalchemy my WHERE claus… Read more Sqlalchemy Duplicated Where Clause To From

Sqlalchemy: How To Implement Drop Table ... Cascade?

I need to drop tables in a PostgreSQL database that have foreign key constraints and require DROP T… Read more Sqlalchemy: How To Implement Drop Table ... Cascade?