Add PostgreSQL bulk load via COPY FROM STDIN#65
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martinv13 merged 1 commit intoJun 19, 2026
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Overrides bulk_insert() in PostgreSQLDialect to stream an in-memory CSV payload to PostgreSQL using the native COPY protocol instead of SQLAlchemy executemany. Supports both psycopg2 (copy_expert) and psycopg3 (cursor.copy), falling back to the base-class implementation for other drivers. Adds integration tests parametrised over both drivers, and updates the PostgreSQL CI workflow to a matrix that runs once per driver. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QvgSwLLGgKaDbZaEYYp7BJ
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Summary
bulk_insert()inPostgreSQLDialectto stream an in-memory CSV payload to PostgreSQL using the nativeCOPY FROM STDINprotocol instead of SQLAlchemyexecutemanycursor.copy_expert) and psycopg3 (cursor.copy), with automatic fallback toexecutemanyfor other driversTest plan
tests/test_bulk_insert_postgres.py— 7 test cases × 2 drivers (14 total): basic types, empty batch, numerics, boolean, datetime, bytea, scalar column defaultspsycopg2, one withpsycopg[binary]pytest -m "not dbtest")DB_STRINGis configured🤖 Generated with Claude Code