Changeset 0.9.2 (#52)

server/database/migrations/002_ci_username.sql

@@ -0,0 +1,14 @@
+-- 002_ci_username.sql
+-- Case-insensitive unique indexes for username and email.
+-- Replaces the default UNIQUE constraint (which is case-sensitive).
+
+-- Normalize existing rows to lowercase first
+UPDATE users SET username = LOWER(username) WHERE username != LOWER(username);
+UPDATE users SET email = LOWER(email) WHERE email != LOWER(email);
+
+-- Drop old case-sensitive unique constraints and add case-insensitive indexes
+ALTER TABLE users DROP CONSTRAINT IF EXISTS users_username_key;
+ALTER TABLE users DROP CONSTRAINT IF EXISTS users_email_key;
+
+CREATE UNIQUE INDEX IF NOT EXISTS users_username_ci ON users (LOWER(username));
+CREATE UNIQUE INDEX IF NOT EXISTS users_email_ci ON users (LOWER(email));