# Task 13 — Export: PostgreSQL

## Goal
System-of-record load package: DDL + COPY-based bulk load (per ADR ingestion path).

## Input
- `canonical/` snapshot, `schema/ddl_postgresql.sql`.

## Actions
1. Generate `exports/postgresql/`:
	- `01_schema.sql` (DDL, versioned);
	- `02_lookups.sql` (atmospheres, measurement_types, column_definitions, instruments);
	- per-table CSV staging files from canonical (streamed);
	- `03_copy_load.sql` (`\copy` statements in dependency order);
	- `04_post_load.sql` (indexes, constraints validation, ANALYZE);
	- `load.sh` / `load.ps1` orchestration.
2. Point tables loaded via COPY; headers via INSERT; partitioning DDL for `friction_data_points` per Phase-1 volume estimates.
3. Include `lineage` table load (row-range granularity).

## Intermediate Result (done when)
- Package executes cleanly on an empty database (test locally if a PG instance is available; otherwise dry-validate SQL syntax).
- Post-load counts script confirms parity with canonical. `EXPORT_MANIFEST.json` written.
