====== PostgreSQL for PostgREST ======

  * http://postgrest.org/en/v5.0/
===== Crear el schema =====
<code>
create schema api;
</code>
===== Crear usuarios =====

==== Anónimos ====

<code>
create role web_anon nologin;
grant web_anon to postgres;
grant usage on schema api to web_anon;
grant select on api.todos to web_anon;
</code>

==== Usuario de confianza ====
<code>
create role todo_user nologin;
grant todo_user to postgres;
grant usage on schema api to todo_user;
grant all on api.todos to todo_user;
grant usage, select on sequence api.todos_id_seq to todo_user;
</code>

===== Acciones básicas mediante llamadas REST =====
<code>
# Basic query
curl http://localhost:3000/todos

# Insert
curl http://localhost:3000/todos -X POST \
     -H "Content-Type: application/json" \
     -d '{"task": "do bad thing"}'

# Advanced queries
GET /people?age=lt.13 HTTP/1.1
GET /people?age=gte.18&student=is.true HTTP/1.1
GET /people?or=(age.gte.14,age.lte.18) HTTP/1.1
GET /people?and=(grade.gte.90,student.is.true,or(age.gte.14,age.is.null)) HTTP/1.1

# Selecting some rows
/people?select=first_name,age
GET /people?order=age.desc,height.asc HTTP/1.1
GET /people?order=age HTTP/1.1
GET /people?order=age.nullsfirst HTTP/1.1
GET /people?order=age.desc.nullslast HTTP/1.1

# Limits and pagination
GET /people?limit=15&offset=30 HTTP/1.1

# Stored procedures ─ Every stored procedure in the API-exposed database schema is accessible under the /rpc
POST /rpc/function_name HTTP/1.1

POST /rpc/add_them HTTP/1.1 { "a": 1, "b": 2 }
GET /rpc/add_them?a=1&b=2 HTTP/1.1

# Delete
DELETE /user?active=is.false HTTP/1.1
</code>