BigQuery Data Clean Rooms vs Ora2Pg

BigQuery Data Clean Rooms let multiple parties share, join, and analyze data without moving or revealing the underlying data. The cloud service works with BigQuery sharing, and shared resources must be BigQuery tables, views, or table-valued functions. Owners manage rooms, contributors publish data, and subscribers query it. Contributors can apply analysis rules, including aggregation thresholds, and owners or publishers can offer predefined query templates without exposing the underlying tables or views. Subscribers are automatically prevented from copying or exporting raw data, while contributors can configure controls for query results. These controls have limits: Google cautions that analysis rules may not stop sophisticated queries from extracting unauthorized data, and notes that rules can be set only on views. Each room can contain at most 100 shared resources. Availability is restricted to BigQuery sharing regions, without listings across multiple regions. Rooms can be managed in the Google Cloud console or created through the API; setup requires enabling the Analytics Hub API and assigning required IAM roles. Contributors pay for storage, while subscribers pay for compute when running queries.

Ora2Pg is free, self-hosted software for assessing and migrating databases to PostgreSQL. It scans Oracle databases, extracts structures or data, and generates SQL; the site also lists MySQL as a source and mentions MariaDB and Microsoft SQL Server migration. Reports can estimate migration difficulty and cost. Exports include tables, views, indexes, constraints, functions, triggers, procedures, and packages, with basic automatic PL/SQL-to-PL/pgSQL conversion. Data can be exported completely or selected with a WHERE clause, including Oracle BLOBs as PostgreSQL BYTEA. Ora2Pg can generate Pentaho Data Integrator XML, send spatial geometries to PostGIS, and export DBLINK as Oracle FDW. By default it writes files for psql loading, while direct PostgreSQL import is available after configuring a connection. Oracle migrations require Perl 5.10 or later, DBI, and Oracle client libraries; other sources need their drivers and client dependencies. Generated Oracle-specific PL/SQL may require manual review and changes. The software is distributed under GPL version 3 or later.