### What?
Improves querying performance of the Local API, reduces copying overhead
### How?
Adds `flattenedFields` property for sanitized collection/global config
which contains fields in database schema structure.
For example, It removes rows / collapsible / unnamed tabs and merges
them to the parent `fields`, ignores UI fields, named tabs are added as
`type: 'tab'`.
This simplifies code in places like Drizzle `transform/traverseFields`.
Also, now we can avoid calling `flattenTopLevelFields` which adds some
overhead and use `collection.flattenedFields` / `field.flattenedFields`.
By refactoring `configToJSONSchema.ts` with `flattenedFields` it also
1. Fixes https://github.com/payloadcms/payload/issues/9467
2. Fixes types for UI fields were generated for `select`
Removes this deep copying for each `where` query constraint
58ac784425/packages/payload/src/database/queryValidation/validateQueryPaths.ts (L69-L73)
which potentially can add overhead if you have a large collection/global
config
UPD:
The overhead is even much more than in the benchmark below if you have
Lexical with blocks.
Benchmark in `relationships/int.spec.ts`:
```ts
const now = Date.now()
for (let i = 0; i < 10; i++) {
const now = Date.now()
for (let i = 0; i < 300; i++) {
const query = await payload.find({
collection: 'chained',
where: {
'relation.relation.name': {
equals: 'third',
},
and: [
{
'relation.relation.name': {
equals: 'third',
},
},
{
'relation.relation.name': {
equals: 'third',
},
},
{
'relation.relation.name': {
equals: 'third',
},
},
{
'relation.relation.name': {
equals: 'third',
},
},
{
'relation.relation.name': {
equals: 'third',
},
},
{
'relation.relation.name': {
equals: 'third',
},
},
{
'relation.relation.name': {
equals: 'third',
},
},
{
'relation.relation.name': {
equals: 'third',
},
},
{
'relation.relation.name': {
equals: 'third',
},
},
],
},
})
}
payload.logger.info(`#${i + 1} ${Date.now() - now}`)
}
payload.logger.info(`Total ${Date.now() - now}`)
```
Before:
```
[02:11:48] INFO: #1 3682
[02:11:50] INFO: #2 2199
[02:11:54] INFO: #3 3483
[02:11:56] INFO: #4 2516
[02:11:59] INFO: #5 2467
[02:12:01] INFO: #6 1987
[02:12:03] INFO: #7 1986
[02:12:05] INFO: #8 2375
[02:12:07] INFO: #9 2040
[02:12:09] INFO: #10 1920
[PASS] Relationships > Querying > Nested Querying > should allow querying two levels deep (24667ms)
[02:12:09] INFO: Total 24657
```
After:
```
[02:12:36] INFO: #1 2113
[02:12:38] INFO: #2 1854
[02:12:40] INFO: #3 1700
[02:12:42] INFO: #4 1797
[02:12:44] INFO: #5 2121
[02:12:46] INFO: #6 1774
[02:12:47] INFO: #7 1670
[02:12:49] INFO: #8 1610
[02:12:50] INFO: #9 1596
[02:12:52] INFO: #10 1576
[PASS] Relationships > Querying > Nested Querying > should allow querying two levels deep (17828ms)
[02:12:52] INFO: Total 17818
```
Payload Postgres Adapter
Official Postgres adapter for Payload.
Installation
npm install @payloadcms/db-postgres
Usage
import { buildConfig } from 'payload'
import { postgresAdapter } from '@payloadcms/db-postgres'
export default buildConfig({
db: postgresAdapter({
pool: {
connectionString: process.env.DATABASE_URI,
},
}),
// ...rest of config
})
More detailed usage can be found in the Payload Docs.