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rls-policy-optimizer

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Optimiza políticas RLS de Supabase usando el patrón (select auth.uid()) para mejor performance. Usa cuando trabajes con RLS policies, auth.uid() reevaluación, o tareas 1.3 y 2.1 del PLAN_MEJORAS.md.

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/design/rls-policy-optimizer-sanchezx1-v0-fullcolor-cotizad/SKILL.md

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RLS Policy Optimizer

Skill para optimizar Row Level Security policies en Supabase evitando reevaluación de auth.uid() por cada fila.

Problema

-- MALO: auth.uid() se evalúa por cada fila
USING (auth.uid() = user_id)

Solución

-- BUENO: (select auth.uid()) se evalúa una vez
USING ((select auth.uid()) = user_id)

Tablas Afectadas en este Proyecto

  • leads - policies: Users insert/read/update
  • cotizaciones - policies: Users insert/read
  • items_cotizacion - policies: Users insert/read
  • email_logs - policies: Admins manage

Instrucciones

  1. Usar MCP Supabase para obtener policies actuales de la tabla
  2. Crear migración en database/migrations/YYYYMMDD_optimize_rls_<tabla>.sql
  3. Incluir DROP POLICY + CREATE POLICY con el fix
  4. Aplicar con mcp_supabase_apply_migration
  5. Verificar con mcp_supabase_get_advisors type="performance"
  6. Documentar en docs/PLAN_MEJORAS.md

Template de Migración

-- Optimizar RLS: usar (select auth.uid()) en lugar de auth.uid()
-- Referencia: https://supabase.com/docs/guides/database/postgres/row-level-security#call-functions-with-select

-- Backup implícito: recreamos la policy con la misma lógica optimizada

DROP POLICY IF EXISTS "Users read own <tabla>" ON public.<tabla>;

CREATE POLICY "Users read own <tabla>" ON public.<tabla>
  FOR SELECT TO authenticated
  USING ((select auth.uid()) = user_id);

Verificación

Después de aplicar, ejecutar advisor de Supabase y confirmar que no hay warnings de "auth function called per row".