Public project file // static demo

Sample Project: full PostgreSQL workflow, not a user diagnosis

This is a static sample/demo project. It is not a diagnosis of your database, does not inspect user data, and does not represent findings from your environment.

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Project summary

Checkout Reliability Sample Project

A SaaS checkout team is preparing PostgreSQL schema changes for orders, payments, refunds, and customer support lookup screens.

public.orderspublic.paymentspublic.refundspublic.customer_events

Project modePublic sample

Database accessNone

Workflow coverage6 stages

Artifacts5 handoff files

Closed-loop workflow

Build, Review, Migration, Validate, Audit, Compare

The sample shows how project evidence moves from a schema draft to owner decisions. It does not touch production systems.

Buildschema draft complete

Draft relational model from product notes

Convert checkout requirements into normalized tables, foreign keys, and timestamp conventions before any production connection exists.

Reviewfindings triaged

Check SQL design risks before migration

Flag missing uniqueness rules, broad nullable fields, and query paths that need evidence before indexes are added.

Migrationstaging-ready

Package safe rollout plan

Split DDL into forward migration, rollback notes, lock-risk comments, and application deployment order.

Validateneeds two query plans

Capture handoff evidence from staging

List exact staging checks for constraints, backfill counts, EXPLAIN output, and application smoke tests.

Auditsample report attached

Read sample operational signals

Show how a real read-only audit would translate sequential scans, temp writes, and index health into owner-ready findings.

Comparedemo delta prepared

Compare before and after evidence

Summarize which risks improved, which need more evidence, and which changes stay blocked until ownership is clear.

Artifact drawer

Project handoff files visible before signup

Each card mirrors the kind of file a real authenticated project can produce, using static sample content.

sql

DDL

Schema draft for checkout objects, keys, and first-pass indexes.

orders/payments/refunds tables
foreign key map
idempotency key constraint

drafted

markdown + sql

migration package

Forward migration, rollback notes, lock notes, and deployment order.

001_checkout_core.sql
rollback notes
lock-risk checklist

staging-ready

markdown

validation handoff

Owner checklist for staging proof before the project can move forward.

row-count checks
EXPLAIN captures
application smoke tests

waiting on evidence

report

audit report

Example read-only operational findings format for a live database review.

sequential scan pressure
temp write risk
index health notes

sample attached

brief

compare summary

Before/after owner summary showing accepted, unresolved, and blocked items.

risk movement
evidence gaps
blocked decisions

demo delta

DDL preview

create table public.orders (
  id bigserial primary key,
  customer_id bigint not null,
  status text not null check (status in ('draft', 'paid', 'refunded')),
  placed_at timestamptz not null default now()
);

create table public.payments (
  id bigserial primary key,
  order_id bigint not null references public.orders(id),
  provider_reference text not null,
  amount_cents integer not null check (amount_cents > 0),
  created_at timestamptz not null default now()
);

create unique index payments_provider_reference_key
  on public.payments(provider_reference);

Decision log

Accepted, needs evidence, blocked/rejected

Decisions are explicit so a team can separate safe work, missing proof, and changes that should not ship.

accepted

Add uniqueness guard for payment provider reference

Duplicate provider references can create support disputes. The sample migration includes a staged unique index plan.

needs evidence

Add composite index for support order lookup

The access path is plausible, but the sample review requires an EXPLAIN plan from the real lookup query before adding index weight.

blocked/rejected

Run broad production cleanup during checkout deploy

Cleanup is operationally unrelated to the schema launch and has no rollback owner in this sample project.

Compare summary

Demo result: one accepted change, one evidence gap, one rejected rollout item.

A real project replaces this static narrative with your own project artifacts, validation notes, audit evidence, and decision history.

View standalone sample report

Public sample boundary: no login required, no database connection, no collector upload, no production writes. This page explains the workflow shape only.