Add datasource BACKFILL skip support

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@tinybirdco/sdk",
-  "version": "0.0.75",
+  "version": "0.0.76",
   "description": "TypeScript SDK for Tinybird Forward - define datasources and pipes as TypeScript",
   "type": "module",
   "main": "./dist/index.js",

src/generator/datasource.test.ts

@@ -109,6 +109,18 @@ describe('Datasource Generator', () => {
       expect(result.content).toContain('    SELECT id');
     });
 
+    it('includes backfill skip when provided', () => {
+      const ds = defineDatasource('test_ds', {
+        schema: {
+          id: t.string(),
+        },
+        backfill: 'skip',
+      });
+
+      const result = generateDatasource(ds);
+      expect(result.content).toContain('BACKFILL skip');
+    });
+
     it("includes indexes block when provided", () => {
       const ds = defineDatasource("test_ds", {
         schema: {

src/generator/datasource.ts

@@ -346,6 +346,11 @@ export function generateDatasource(
     parts.push(indexes);
   }
 
+  if (datasource.options.backfill === "skip") {
+    parts.push("");
+    parts.push("BACKFILL skip");
+  }
+
   // Add Kafka configuration if present
   if (datasource.options.kafka) {
     parts.push("");

src/schema/datasource.test.ts

@@ -170,6 +170,15 @@ describe("Datasource Schema", () => {
       ]);
     });
 
+    it("accepts backfill skip configuration", () => {
+      const ds = defineDatasource("events_rollup", {
+        schema: { id: t.string() },
+        backfill: "skip",
+      });
+
+      expect(ds.options.backfill).toBe("skip");
+    });
+
     it("validates datasource index fields", () => {
       expect(() =>
         defineDatasource("events", {

src/schema/datasource.ts

@@ -144,6 +144,8 @@ export interface DatasourceOptions<TSchema extends SchemaDefinition> {
   forwardQuery?: string;
   /** Secondary indexes for MergeTree-family engines */
   indexes?: readonly DatasourceIndex[];
+  /** Skip backfilling data when creating a datasource targeted by a materialized view */
+  backfill?: "skip";
   /** Kafka ingestion configuration */
   kafka?: KafkaConfig;
   /** S3 ingestion configuration */