-- CreateTable
CREATE TABLE "issue_change" (
    "id" SERIAL NOT NULL,
    "issueId" INTEGER NOT NULL,
    "changeId" TEXT NOT NULL,
    "field" TEXT NOT NULL,
    "oldValue" TEXT,
    "newValue" TEXT,
    "actorId" TEXT,
    "changedAt" TIMESTAMPTZ(3) NOT NULL,

    CONSTRAINT "issue_change_pkey" PRIMARY KEY ("id")
);

-- CreateIndex
CREATE INDEX "issue_change_issueId_changedAt_idx" ON "issue_change"("issueId", "changedAt");

-- CreateIndex
CREATE INDEX "issue_change_field_changedAt_idx" ON "issue_change"("field", "changedAt");

-- CreateIndex
CREATE INDEX "issue_change_actorId_idx" ON "issue_change"("actorId");

-- AddForeignKey
ALTER TABLE "issue_change" ADD CONSTRAINT "issue_change_issueId_fkey" FOREIGN KEY ("issueId") REFERENCES "issue"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "issue_change" ADD CONSTRAINT "issue_change_actorId_fkey" FOREIGN KEY ("actorId") REFERENCES "user"("id") ON DELETE SET NULL ON UPDATE CASCADE;