etlantic-sql
PostgreSQL reference SQL execution plugin for ETLantic 0.20.
pip install 'etlantic==0.33.0' 'etlantic-sql==0.33.0'
# or: pip install 'etlantic[sql]'
export ETLANTIC_SQL_URL=postgresql+psycopg://user:pass@localhost:5432/etlantic
# SQLite is fine for demos only:
# export ETLANTIC_SQL_URL=sqlite+pysqlite:///:memory:
Uses SQLAlchemy Core. Driver dependencies stay out of etlantic core.
Wiring
from etlantic import Profile
Profile(name="sql-prod", sql_engine="sql")
The etlantic.sql_plugins entry point named sql registers
etlantic_sql:create_plugin. Profiles select it with sql_engine="sql";
keep connection URLs in environment-backed configuration or secret providers,
not in plans.
Register @Transformation.implementation("sql") handlers that take
RelationRef inputs and return SQL query handles (not fetched rows).
Capabilities
- SQL→SQL fusion without intermediate Python row fetch
- Durable run-scoped staging tables (not session TEMP)
- Insert-select / CTAS-style publication
- Fail-closed planning when required capabilities are missing
MERGE / upsert: advertised for PostgreSQL (sql_merge=True, INSERT … ON CONFLICT). SQLite remains sql_merge=False (fail closed).
Examples
python examples/sql_to_sql.py
python examples/sql_boundary_hybrid.py
python examples/sql_transactional_write.py
python examples/sql_failure_recovery.py
1 maintainer
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