ewiger / sqlalchemy-XL

on-the-fly "patch" SQL dialect to support postgres-XL

sqlachemy-XL

A small tool that can on-the-fly "patch" SQL dialect of the sqlalchemy project to enable creation of the correct database scheme that works in postgres-XL cluster.

Usage

from sqlalchemy_xl.decorators import distribute_by_hash
from sqlalchemy_xl import generate_sql

...

Base = declarative_base()


@distribute_by_hash('id')
class Address(Base):
    __tablename__ = 'address'
...

print(generate_sql(Base.metadata))

Examples

python examples/case1.py

the modified output will contain DISTRIBUTE BY HASH statement

CREATE TABLE person (
	id SERIAL NOT NULL, 
	name VARCHAR(250) NOT NULL, 
	PRIMARY KEY (id)
) DISTRIBUTE BY HASH(id);

CREATE TABLE address (
	id SERIAL NOT NULL, 
	street_name VARCHAR(250), 
	street_number VARCHAR(250), 
	post_code VARCHAR(250) NOT NULL, 
	person_id INTEGER, 
	PRIMARY KEY (id), 
	FOREIGN KEY(person_id) REFERENCES person (id)
) DISTRIBUTE BY HASH(id);