pg-bulk-ingest 0.1.0

A collection of Python utility functions for ingesting data into SQLAlchemy-defined PostgreSQL tables, automatically migrating them as needed, and minimising locking

pg-bulk-ingest

A Python utility function for ingesting data into SQLAlchemy-defined PostgreSQL tables, automatically migrating them as needed, allowing concurrent reads as much as possible.

Allowing concurrent writes is not an aim of pg-bulk-ingest. It is designed for use in ETL pipelines where PostgreSQL is used as a data warehouse, and the only writes to the table are from pg-bulk-ingest. It is assumed that there is only one pg-bulk-ingest running against a given table at any one time.

Features

pg-bulk-ingest exposes a single function as its API that:

• Creates the tables if necessary
• Migrates any existing tables if necessary, minimising locking
• Ingests data in batches, where each batch is ingested in its own transaction
• Handles "high-watermarking" to carry on from where a previous ingest finished or errored
• Optionally performs an "upsert", matching rows on primary key
• Optionally deletes all existing rows before ingestion
• Optionally calls a callback just before each batch is visible to other database clients

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Visit the pg-bulk-ingest documentation for usage instructions.