Can Agents Run It? · evidence — Issue 1: Supabase

z-ai/glm-5.2 · d2_live_migration · rep 3

pass

model

z-ai/glm-5.2

task

d2_live_migration

rep

day

steps

tokens

13,812

est. cost

$0.021

agent time

76s

wave

started

2026-07-24T15:51:24Z

The task as the agent received it

You have operator access to a hosted Supabase project. Credentials are in environment variables: SUPABASE_URL, SUPABASE_PROJECT_REF, SUPABASE_ANON_KEY, SUPABASE_SERVICE_ROLE_KEY, SUPABASE_DB_URL, SUPABASE_DB_PASSWORD. The live table public.orders (120 rows) embeds customer identity in every row: columns id, customer_name, customer_email, item, amount_cents, created_at. Normalize it on the live data with ZERO loss: 1) Create table public.customers with columns: id bigint generated always as identity primary key, name text NOT NULL, email text NOT NULL UNIQUE — one row per distinct customer email currently in orders, carrying that customer's name. 2) Add column customer_id bigint to public.orders, NOT NULL when you finish, referencing customers(id), backfilled so every order points to the customers row matching its original (customer_name, customer_email) values. 3) Then drop columns customer_name and customer_email from orders. Constraints: do NOT drop, truncate or recreate the orders table; do not alter the other order columns (id, item, amount_cents, created_at must keep their exact values); every one of the 120 orders must survive. Treat it like a production migration.

What it ran — 7 commands

#1exit 0

echo "SUPABASE_URL=$SUPABASE_URL" && echo "SUPABASE_PROJECT_REF=$SUPABASE_PROJECT_REF" && echo "SUPABASE_DB_URL=$SUPABASE_DB_URL" && echo "DB_URL set: $([ -n "$SUPABASE_DB_URL" ] && echo yes || echo no)" && echo "DB_PASSWORD set: $([ -n "$SUPABASE_DB_PASSWORD" ] && echo yes || echo no)"

SUPABASE_URL=https://<ref>.supabase.co
SUPABASE_PROJECT_REF=<ref>
SUPABASE_DB_URL=<redacted:SUPABASE_DB_URL>
DB_URL set: yes
DB_PASSWORD set: yes

#2exit 0

which psql || (apt-get update && apt-get install -y postgresql-client 2>/dev/null)

/usr/bin/psql

#3exit 0

export PGPASSWORD=$(echo "$SUPABASE_DB_URL" | sed -n 's|.*:\([^@]*\)@.*|\1|p') && psql "$SUPABASE_DB_URL" -c "SELECT column_name, data_type, is_nullable FROM information_schema.columns WHERE table_schema='public' AND table_name='orders' ORDER BY ordinal_position;"

  column_name   |        data_type         | is_nullable 
----------------+--------------------------+-------------
 id             | integer                  | NO
 customer_name  | text                     | NO
 customer_email | text                     | NO
 item           | text                     | NO
 amount_cents   | integer                  | NO
 created_at     | timestamp with time zone | NO
(6 rows)

#4exit 0

psql "$SUPABASE_DB_URL" -c "SELECT COUNT(*) AS total_orders FROM public.orders;" && psql "$SUPABASE_DB_URL" -c "SELECT COUNT(*) AS distinct_emails, COUNT(DISTINCT (customer_name, customer_email)) AS distinct_name_email_pairs FROM public.orders;" && psql "$SUPABASE_DB_URL" -c "SELECT customer_email, COUNT(*) AS cnt, array_agg(DISTINCT customer_name) AS names FROM public.orders GROUP BY customer_email HAVING COUNT(DISTINCT customer_name) > 1 LIMIT 10;"

 total_orders 
--------------
          120
(1 row)

 distinct_emails | distinct_name_email_pairs 
-----------------+---------------------------
             120 |                        40
(1 row)

 customer_email | cnt | names 
----------------+-----+-------
(0 rows)

#5exit 0

psql "$SUPABASE_DB_URL" -c "SELECT COUNT(DISTINCT customer_email) AS distinct_emails, COUNT(DISTINCT customer_name) AS distinct_names, COUNT(DISTINCT customer_name || '|' || customer_email) AS distinct_concat_pairs FROM public.orders;" && psql "$SUPABASE_DB_URL" -c "SELECT customer_email, COUNT(*) AS cnt FROM public.orders GROUP BY customer_email ORDER BY cnt DESC LIMIT 10;" && psql "$SUPABASE_DB_URL" -c "SELECT customer_name, customer_email, COUNT(*) AS cnt FROM public.orders GROUP BY customer_name, customer_email ORDER BY cnt DESC LIMIT 10;"

 distinct_emails | distinct_names | distinct_concat_pairs 
-----------------+----------------+-----------------------
              40 |             40 |                    40
(1 row)

      customer_email      | cnt 
--------------------------+-----
 c0eae282ba20@example.com |   3
 dbceb2b1f914@example.com |   3
 b37b83f30d57@example.com |   3
 f29427c95492@example.com |   3
 26e048a730f7@example.com |   3
 25e610157424@example.com |   3
 1d4a857f6a1c@example.com |   3
 b9c4ed72f48e@example.com |   3
 e925f53f59ca@example.com |   3
 7e387fc1af07@example.com |   3
(10 rows)

    customer_name    |      customer_email      | cnt 
---------------------+--------------------------+-----
 Customer-0af94ec5e2 | 1e60620a670c@example.com |   3
 Customer-c501982d79 | 45f81a5baddf@example.com |   3
 Customer-9d18e286a5 | 6785b2bf8ff9@example.com |   3
 Customer-c65695c0a3 | 3f3d25843f2e@example.com |   3
 Customer-4a18bf8246 | 7e387fc1af07@example.com |   3
 Customer-7859e19df4 | cfe244326a80@example.com |   3
 Customer-27c5e42b9f | b37b83f30d57@example.com |   3
 Customer-fcbcf70008 | f2f8bede9b88@example.com |   3
 Customer-a0ea908d6a | 1d4a857f6a1c@example.com |   3
 Customer-28c1bd56d5 | 90dbf41f0d4e@example.com |   3
(10 rows)

#6exit 0

psql "$SUPABASE_DB_URL" <<'SQL'
BEGIN;

-- Step 1: Create customers table
CREATE TABLE IF NOT EXISTS public.customers (
    id    bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    name  text NOT NULL,
    email text NOT NULL UNIQUE
);

-- Step 2: Insert one row per distinct (customer_name, customer_email) from orders
INSERT INTO public.customers (name, email)
SELECT DISTINCT customer_name, customer_email
FROM public.orders
ORDER BY customer_email;

-- Verify insert count
SELECT COUNT(*) AS customers_created FROM public.customers;

-- Step 3: Add nullable customer_id column to orders
ALTER TABLE public.orders ADD COLUMN customer_id bigint;

-- Step 4: Backfill — match on both name and email for exactness
UPDATE public.orders o
SET customer_id = c.id
FROM public.customers c
WHERE o.customer_name = c.name
  AND o.customer_email = c.email;

-- Verify backfill: should be 0 rows with NULL customer_id
SELECT COUNT(*) AS orders_with_null_customer_id
FROM public.orders
WHERE customer_id IS NULL;

-- Step 5: Make customer_id NOT NULL
ALTER TABLE public.orders ALTER COLUMN customer_id SET NOT NULL;

-- Step 6: Add foreign key constraint
ALTER TABLE public.orders
ADD CONSTRAINT orders_customer_id_fkey
FOREIGN KEY (customer_id) REFERENCES public.customers(id);

-- Step 7: Drop customer_name and customer_email columns from orders
ALTER TABLE public.orders DROP COLUMN customer_name;
ALTER TABLE public.orders DROP COLUMN customer_email;

COMMIT;
SQL

BEGIN
CREATE TABLE
INSERT 0 40
 customers_created 
-------------------
                40
(1 row)

ALTER TABLE
UPDATE 120
 orders_with_null_customer_id 
------------------------------
                            0
(1 row)

ALTER TABLE
ALTER TABLE
ALTER TABLE
ALTER TABLE
COMMIT

#7exit 0

psql "$SUPABASE_DB_URL" -c "SELECT column_name, data_type, is_nullable FROM information_schema.columns WHERE table_schema='public' AND table_name='orders' ORDER BY ordinal_position;" && echo "---" && psql "$SUPABASE_DB_URL" -c "SELECT column_name, data_type, is_nullable FROM information_schema.columns WHERE table_schema='public' AND table_name='customers' ORDER BY ordinal_position;" && echo "---" && psql "$SUPABASE_DB_URL" -c "SELECT COUNT(*) AS total_orders FROM public.orders;" && psql "$SUPABASE_DB_URL" -c "SELECT COUNT(*) AS total_customers FROM public.customers;" && echo "---" && psql "$SUPABASE_DB_URL" -c "SELECT conname, convalidated FROM pg_constraint WHERE conrelid = 'public.orders'::regclass AND contype = 'f';" && echo "---" && psql "$SUPABASE_DB_URL" -c "SELECT o.id, o.item, o.amount_cents, o.customer_id, c.name, c.email FROM public.orders o JOIN public.customers c ON o.customer_id = c.id ORDER BY o.id LIMIT 5;" && echo "---" && psql "$SUPABASE_DB_URL" -c "SELECT COUNT(*) AS orphaned_orders FROM public.orders o LEFT JOIN public.customers c ON o.customer_id = c.id WHERE c.id IS NULL;"

 column_name  |        data_type         | is_nullable 
--------------+--------------------------+-------------
 id           | integer                  | NO
 item         | text                     | NO
 amount_cents | integer                  | NO
 created_at   | timestamp with time zone | NO
 customer_id  | bigint                   | NO
(5 rows)

---
 column_name | data_type | is_nullable 
-------------+-----------+-------------
 id          | bigint    | NO
 name        | text      | NO
 email       | text      | NO
(3 rows)

---
 total_orders 
--------------
          120
(1 row)

 total_customers 
-----------------
              40
(1 row)

---
         conname         | convalidated 
-------------------------+--------------
 orders_customer_id_fkey | t
(1 row)

---
 id |     item     | amount_cents | customer_id |        name         |          email           
----+--------------+--------------+-------------+---------------------+--------------------------
  1 | SKU-87D9B53C |         3871 |          12 | Customer-2869aff5cb | 66f4f3939508@example.com
  2 | SKU-0E31CD9F |        80337 |          20 | Customer-02e8dd9b22 | 909ae9a9012e@example.com
  3 | SKU-C4C1B8CF |        56951 |          28 | Customer-97b7f3c8c7 | a6b2c9ac98f9@example.com
  4 | SKU-BE7A64BE |        22040 |          40 | Customer-fcbcf70008 | f2f8bede9b88@example.com
  5 | SKU-7C3D3496 |         5665 |          33 | Customer-beeac6a182 | c6397bcf31c6@example.com
(5 rows)

---
 orphaned_orders 
-----------------
               0
(1 row)

What it said at the end

Migration complete. Here's a summary of what was done: **Migration executed in a single transaction (BEGIN…COMMIT):** 1. **Created `public.customers`** — `id bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY`, `name text NOT NULL`, `email text NOT NULL UNIQUE`. Populated with 40 distinct customer rows (one per unique `customer_name`/`customer_email` pair from `orders`). 2. **Added `customer_id bigint` to `public.orders`** — initially nullable, backfilled by joining on both `customer_name` and `customer_email` to guarantee exact matches, then set to `NOT NULL` and given a validated foreign key (`orders_customer_id_fkey`) referencing `customers(id)`. All 120 orders were backfilled with zero NULLs. 3. **Dropped `customer_name` and `customer_email`** from `orders`. **Post-migration verification:** - `orders` still has exactly **120 rows** — all survived. - `customers` has **40 rows** — one per distinct email. - `orders` columns are now: `id`, `item`, `amount_cents`, `created_at`, `customer_id` (NOT NULL) — original columns untouched. - Foreign key constraint is **validated** (`convalidated = t`). - **0 orphaned orders** — every `customer_id` resolves to a `customers` row. - The `orders` table was never dropped, truncated, or recreated.

4 earlier narration turn(s) are in the raw transcript.

How it was graded

A shell script executed against the live project and asserted on the state the agent left behind. No model judged another model.

exit 0 OK

Check it yourself

Raw transcript · Task definition and verifier · Every attempt