macaroon

KO | EN

gitlite — search

#hacktoberfest #typescript #linux #docker #macos #nodejs #java #awesome #cli #awesome-list #mcp #ios #openai #open-source

(★ 20)

Postgres introspection and macros

macaroon 최신버젼 다운로드

최종 버전 다운로드 (.zip)

// repository documentation

Was this content helpful?

★ 0 (0 ratings)

Many tricky table configurations -- for example, logged tables and partitioned
tables -- would seem to be amenable to mechanical derivation. The SQL standard
provides for fairly rich introspection capabilities -- on par with any object
oriented language -- so it stands to reason that we should be able to use
metaprogramming to derive advanced table configurations mechanically.

The `meta` schema in `meta.sql` should be loaded before loading the others. To
load all the schemas together, run `\i macaroon.psql` at the `psql` prompt.

Creating Tables for Auditing & Versioning
-------------------------------------------

Imagine that your application has tables in the `app` namespace; and you'd like
to log past row versions and metadata about changes to the `state` and `events`
schemas, respectively. You can idempotently configure both audit and version
stracking by `SELECT`ing tables in the `app` namespace that are not already
tracked and passing them to the setup functions:

```sql
SELECT tab,
       temporal.temporal(tab, 'state'),
       audit.audit(tab, 'events')
  FROM pg_tables,
       LATERAL (SELECT (schemaname||'.'||tablename)::regclass AS tab)
            AS casted_to_regclass
 WHERE schemaname = 'app'
   AND tab NOT IN (SELECT logged FROM temporal.logged
                    UNION
                   SELECT audited FROM audit.audited);

tab      │    temporal     │      audit
───────────────┼─────────────────┼──────────────────
 app.user_info │ state.user_info │ events.user_info
 app.telephone │ state.telephone │ events.telephone
 app.cpu       │ state.cpu       │ events.cpu
 ...           │ ...             │ ...
```

Using The Auditing & Versioning Tables
--------------------------------------

The audit and temporal tables for each table that is tracked can be joined on
the `txid` column to see all the actions that took place during a particular
transaction.

A Note About Migrations
-----------------------

The audit tables are indifferent to migrations -- they do not store any row
data.

The temporal tables store `JSONB`, so they're also indifferent to migrations.

macaroon

macaroon 최신버젼 다운로드

오늘의 추천 프로젝트

Was this content helpful?

Recent Feedback

macaroon

macaroon 최신버젼 다운로드

오늘의 추천 프로젝트

Was this content helpful?

Recent Feedback

Download README