supabase-database-functions

Store API keys in Supabase database functions by using Vault-based secret management to retrieve credentials without hardcoding. This ensures secure function definitions and consistent secret handling.

SECURITY INVOKER runs PostgreSQL functions with the caller's permissions, while SECURITY DEFINER executes with the creator's privileges. Use INVOKER by default and apply explicit permission checks for DEFINER with a safe fallback.

You must set search_path = '' in PostgreSQL database functions to prevent schema spoofing attacks. Referencing objects with fully qualified names ensures consistent schema qualification and secure execution.

Yes, you can implement Supabase Vault with RLS-aware database triggers by applying BEFORE or AFTER triggers that securely retrieve secrets. This pattern enforces strict data access workflows within PostgreSQL.

Apply explicit grants for Supabase SECURITY DEFINER functions by configuring strict permission checks and safe fallbacks. This ensures only authorized roles execute privileged operations without bypassing Row Level Security.

Avoid using SECURITY DEFINER for Supabase database functions when standard RLS policies suffice for data access needs. Default to SECURITY INVOKER to maintain row-level security boundaries unless explicit privilege escalation is required.