How to import CSV into Supabase
Use the Supabase Table Editor or PostgreSQL COPY, then check column ownership, tenant context, constraints and the imported result.
Technical guides
Get the customer’s data into the right shape—and the right place.
Practical guides for engineers and founders working with customer exports in Supabase and PostgreSQL. Start with the task in front of you.
Start here
How to build a CSV importer for a SaaS application
An engineering guide to parsing, mapping, tenant authority, validation, writes, retries and reconciliation—with a clear path for simpler imports.
Database boundaries
Supabase imports, RLS and tenant-owned fields
Separate CSV values from tenant authority. Understand user JWTs, service-role access and the PostgreSQL COPY limitation when RLS applies.
PostgreSQL CSV imports: defaults, identity and generated columns
Choose an explicit COPY column list. Understand omitted values, NULL, identity overrides and generated expressions before importing customer data.
Importing CSV data with foreign keys in PostgreSQL
Resolve source references to destination IDs without guessing. Handle tenant scope, missing matches, ordering and nullable or deferred relationships.
Import correctness
How to verify a PostgreSQL CSV import
Check more than row counts after a customer import. Compare accepted keys, transformed values, tenant scope and unresolved outcomes with PostgreSQL SQL.
About these guides
Mohamed Atef — Founder, ImportFlow. I’m building a narrow customer-import product for small Supabase SaaS teams. These guides explain engineering techniques more broadly than the current founder-assisted pilot supports.
Each guide names its assumptions, sources and last reviewed date. Reviews follow substantive changes to the examples, platform behavior or product scope; dates are not refreshed automatically. See the public architecture and current implementation boundary. Send corrections to mohamed@importflow.dev.