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server/prisma/migrations/20260315221500_purchase_order_revisions/migration.sql

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+-- CreateTable
+CREATE TABLE "PurchaseOrderRevision" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "purchaseOrderId" TEXT NOT NULL,
+    "revisionNumber" INTEGER NOT NULL,
+    "reason" TEXT NOT NULL,
+    "snapshot" TEXT NOT NULL,
+    "createdById" TEXT,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" DATETIME NOT NULL,
+    CONSTRAINT "PurchaseOrderRevision_purchaseOrderId_fkey" FOREIGN KEY ("purchaseOrderId") REFERENCES "PurchaseOrder" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    CONSTRAINT "PurchaseOrderRevision_createdById_fkey" FOREIGN KEY ("createdById") REFERENCES "User" ("id") ON DELETE SET NULL ON UPDATE CASCADE
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "PurchaseOrderRevision_purchaseOrderId_revisionNumber_key" ON "PurchaseOrderRevision"("purchaseOrderId", "revisionNumber");
+
+-- CreateIndex
+CREATE INDEX "PurchaseOrderRevision_purchaseOrderId_createdAt_idx" ON "PurchaseOrderRevision"("purchaseOrderId", "createdAt");