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packages/database/prisma/migrations/20220414101318_remove_duplicate_emails/migration.sql

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+-- AlterTable
+ALTER TABLE "Comment" ADD COLUMN     "updatedAt" TIMESTAMP(3);
+
+-- AlterTable
+ALTER TABLE "Option" ADD COLUMN     "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+ADD COLUMN     "updatedAt" TIMESTAMP(3);
+
+-- AlterTable
+ALTER TABLE "Participant" ADD COLUMN     "updatedAt" TIMESTAMP(3);
+
+-- AlterTable
+ALTER TABLE "User" ADD COLUMN     "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+ADD COLUMN     "updatedAt" TIMESTAMP(3);
+
+-- AlterTable
+ALTER TABLE "Vote" ADD COLUMN     "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+ADD COLUMN     "updatedAt" TIMESTAMP(3);
+
+-- We need to get rid of duplicate email addresses in the users table
+-- because the index was previously case sensitive
+
+-- First we update all polls created by users with a duplicate email address
+-- to a single user
+UPDATE "Poll" p SET "userId" = u.id
+FROM (
+	SELECT min(id) id, array_agg(id) as "userIds"
+	FROM "User" u
+	GROUP BY lower(email)
+	HAVING count(*) > 1
+) u
+WHERE p."userId" = any(u."userIds")
+AND p."userId" <> u.id;
+
+-- Remove all users that do not have polls
+DELETE FROM "User" u
+WHERE NOT EXISTS (SELECT * FROM "Poll" p WHERE u.id = p."userId");
+
+-- Add citext extension
+CREATE EXTENSION IF NOT EXISTS citext;
+
+-- Change email to citext
+ALTER TABLE "User"
+ALTER COLUMN email TYPE citext;