SQLAlchemy can be used for partitioning in Postgres by utilizing the PostgreSQL-specific partitioning features.
To create partitions using SQLAlchemy, the following steps can be followed:
from sqlalchemy import Table, Column, Integer, String
from sqlalchemy.schema import CheckConstraint
from sqlalchemy.dialects.postgresql import INTEGER
metadata = MetaData()
parent_table = Table(
'parent_table',
metadata,
Column('id', Integer, primary_key=True),
Column('name', String),
Column('partition_key', INTEGER),
CheckConstraint('partition_key >= 0 AND partition_key < 10', name='partition_key_check')
)
child_table_0 = Table(
'child_table_0',
metadata,
Column('id', Integer, primary_key=True),
Column('name', String),
Column('partition_key', INTEGER),
CheckConstraint('partition_key = 0', name='partition_key_check')
)
child_table_1 = Table(
'child_table_1',
metadata,
Column('id', Integer, primary_key=True),
Column('name', String),
Column('partition_key', INTEGER),
CheckConstraint('partition_key = 1', name='partition_key_check')
)
...
# Insert data into the partitioned table
conn.execute(parent_table.insert(), [
{'name': 'Foo', 'partition_key': 0},
{'name': 'Bar', 'partition_key': 1},
{'name': 'Baz', 'partition_key': 2},
...
])
# Query data from a specific child table
result = conn.execute(child_table_0.select())
Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss
Asked: 2021-10-26 11:00:00 +0000
Seen: 15 times
Last updated: Sep 21 '21
How can pgcrypto be used to secure data on Postgres?
In PySpark, how does the lead function work when the value of a column changes?
How can SQL output be structured in a column-based XML format instead of row-based?
What is the SQL grammar used for addSql in Doctrine?
How can Django Admin accommodate a variety of formats and locales for its input fields?
How can an array be passed using typo3 flexform xml and itemsProcConfig?