https://github.com/griffio/sqldelight-postgres-lateral-join

SqlDelight PostgreSql Lateral Joins
https://github.com/griffio/sqldelight-postgres-lateral-join

kotlin lateral postgresql sqldelight

Last synced: 5 days ago
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SqlDelight PostgreSql Lateral Joins

• Host: GitHub
• URL: https://github.com/griffio/sqldelight-postgres-lateral-join
• Owner: griffio
• Created: 2024-09-14T14:01:45.000Z (3 months ago)
• Default Branch: master
• Last Pushed: 2024-12-06T10:59:29.000Z (18 days ago)
• Last Synced: 2024-12-06T11:33:41.407Z (18 days ago)
• Topics: kotlin, lateral, postgresql, sqldelight
• Language: Kotlin
• Homepage:
• Size: 62.5 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# SqlDelight 2.1.x Postgresql Lateral Joins 

https://github.com/cashapp/sqldelight

Snapshot version: 2.1.0-SNAPSHOT

Initial support for lateral joins https://github.com/cashapp/sqldelight/pull/5337

Not supported: Lateral joins on table expressions e.g json, arrays, sets, generate_series

```sql

SELECT

    pledged_usd,

    avg_pledge_usd,

    duration,

    (usd_from_goal / duration) AS usd_needed_daily

FROM Kickstarter_Data,

    LATERAL (SELECT pledged / NULLIF(fx_rate, 0) AS pledged_usd) pu,

    LATERAL (SELECT pledged_usd / NULLIF(backers_count, 0) AS avg_pledge_usd) apu,

    LATERAL (SELECT goal / NULLIF(fx_rate, 0) AS goal_usd) gu,

    LATERAL (SELECT goal_usd - pledged_usd AS usd_from_goal) ufg,

    LATERAL (SELECT (deadline - launched_at) / 86400.00 AS duration) dr;

```

```sql

SELECT

  sp.id salesperson_id,

  sp.full_name,

  sp.home_region_id,

  rg.name AS home_region_name,

  home_region_sales.total_sales

FROM SalesPeople sp

  JOIN Regions rg ON sp.home_region_id = rg.id

  JOIN LATERAL (

    SELECT SUM(amount) AS total_sales

    FROM Sales s

    WHERE s.salesperson_id = sp.id

      AND s.region_id = sp.home_region_id

  ) home_region_sales ON TRUE;

```

----

```shell

createdb laterals &&

./gradlew build &&

./gradlew flywayMigrate

```

Flyway db migrations

https://documentation.red-gate.com/fd/gradle-task-184127407.html