/*
  Warnings:

  - Changed the type of `grade` on the `GameSession` table. No cast exists, the column would be dropped and recreated, which cannot be done if there is data, since the column is required.
  - Changed the type of `grade` on the `LeaderboardEntry` table. No cast exists, the column would be dropped and recreated, which cannot be done if there is data, since the column is required.
  - Changed the type of `grade` on the `Question` table. No cast exists, the column would be dropped and recreated, which cannot be done if there is data, since the column is required.

*/
-- CreateEnum
CREATE TYPE "Grade" AS ENUM ('G3', 'G6', 'G9');

-- AlterTable
ALTER TABLE "GameSession" DROP COLUMN "grade",
ADD COLUMN     "grade" "Grade" NOT NULL;

-- AlterTable
ALTER TABLE "LeaderboardEntry" DROP COLUMN "grade",
ADD COLUMN     "grade" "Grade" NOT NULL;

-- AlterTable
ALTER TABLE "Question" DROP COLUMN "grade",
ADD COLUMN     "grade" "Grade" NOT NULL;

-- CreateIndex
CREATE UNIQUE INDEX "LeaderboardEntry_userId_grade_subject_key" ON "LeaderboardEntry"("userId", "grade", "subject");