summary
- use the indexed primary key (`id`) for `getbyid`, `updateserver`, and
list ordering/cursor, instead of extracting `_meta...id` from jsonb
- in `updateserver`, error if the body tries to change the id; set
`meta.official.id` when missing
changes
- database: `getbyid` → `where id = $1`
- database: `updateserver` → `where id = $2`; fail on id mismatch; set
id if missing
- database: `list` orders by `id` and paginates via `id > $cursor`
- no schema or api changes
<details>
<summary>performance</summary>
- env: repo docker compose postgres, 5k–10k rows, warm cache
- getbyid: `id` ≈ 0.02 ms vs jsonb path ≈ 0.80 ms
- update: `id` ≈ 0.15 ms vs jsonb path ≈ 0.78 ms
- list (limit 100): order by `id` ≈ 0.13 ms vs jsonb path id ≈ 2.24 ms
(~17x slower)
</details>
<details>
<summary>explain analyze snippets</summary>
getbyid by `id`
```
Index Scan using idx_benchmark_servers_id on benchmark_servers (actual time≈0.01–0.02 ms)
Buffers: shared hit≈3
```
getbyid by jsonb path
```
Seq Scan on benchmark_servers (actual time≈0.43–0.83 ms)
Filter: ((value->'_meta'->'io.modelcontextprotocol.registry/official'->>'id') = $1)
Rows Removed by Filter: ≈4999
Buffers: shared hit≈455
```
update by `id`
```
Update on benchmark_servers …
-> Index Scan using idx_benchmark_servers_id … (actual time≈0.007 ms)
Execution Time: ≈0.15 ms
```
update by jsonb path
```
Update on benchmark_servers …
-> Seq Scan on benchmark_servers … Rows Removed by Filter: ≈4999
Execution Time: ≈0.78 ms
```
</details>
<details>
<summary>reproduce quickly</summary>
- start postgres: `docker compose up -d postgres`
- create a simple table (id varchar pk, value jsonb) with several
thousand rows
- compare plans: `explain (analyze, buffers) select value from … where
id = $1` vs the jsonb path predicate
</details>
---------
Co-authored-by: Adam Jones <adamj@anthropic.com>
72f9f80d68