ES|QL: add tests for ccs ENRICH with local only policy (elastic#134199)

Author: luigidellaquila

x-pack/plugin/esql/src/internalClusterTest/java/org/elasticsearch/xpack/esql/action/AbstractEnrichBasedCrossClusterTestCase.java

@@ -87,6 +87,7 @@ protected Settings nodeSettings() {
     }
 
     static final EnrichPolicy hostPolicy = new EnrichPolicy("match", null, List.of("hosts"), "ip", List.of("ip", "os"));
+    static final EnrichPolicy hostPolicyLocal = new EnrichPolicy("match", null, List.of("hosts_local"), "ip", List.of("ip", "os"));
     static final EnrichPolicy vendorPolicy = new EnrichPolicy("match", null, List.of("vendors"), "os", List.of("os", "vendor"));
 
     @Before
@@ -115,18 +116,23 @@ public void setupHostsEnrich() {
             "Windows"
         );
         for (String cluster : allClusters()) {
-            Client client = client(cluster);
-            client.admin().indices().prepareCreate("hosts").setMapping("ip", "type=ip", "os", "type=keyword").get();
-            for (Map.Entry<String, String> h : allHosts.entrySet()) {
-                client.prepareIndex("hosts").setSource("ip", h.getKey(), "os", h.getValue()).get();
-            }
-            client.admin().indices().prepareRefresh("hosts").get();
-            client.execute(PutEnrichPolicyAction.INSTANCE, new PutEnrichPolicyAction.Request(TEST_REQUEST_TIMEOUT, "hosts", hostPolicy))
-                .actionGet();
-            client.execute(ExecuteEnrichPolicyAction.INSTANCE, new ExecuteEnrichPolicyAction.Request(TEST_REQUEST_TIMEOUT, "hosts"))
-                .actionGet();
-            assertAcked(client.admin().indices().prepareDelete("hosts"));
+            initHostsPolicy(client(cluster), "hosts", hostPolicy, allHosts);
+        }
+        // create policy on coordinator only
+        initHostsPolicy(client(), "hosts_local", hostPolicyLocal, allHosts);
+    }
+
+    private static void initHostsPolicy(Client client, String indexName, EnrichPolicy policy, Map<String, String> allHosts) {
+        client.admin().indices().prepareCreate(indexName).setMapping("ip", "type=ip", "os", "type=keyword").get();
+        for (Map.Entry<String, String> h : allHosts.entrySet()) {
+            client.prepareIndex(indexName).setSource("ip", h.getKey(), "os", h.getValue()).get();
         }
+        client.admin().indices().prepareRefresh(indexName).get();
+        client.execute(PutEnrichPolicyAction.INSTANCE, new PutEnrichPolicyAction.Request(TEST_REQUEST_TIMEOUT, indexName, policy))
+            .actionGet();
+        client.execute(ExecuteEnrichPolicyAction.INSTANCE, new ExecuteEnrichPolicyAction.Request(TEST_REQUEST_TIMEOUT, indexName))
+            .actionGet();
+        assertAcked(client.admin().indices().prepareDelete(indexName));
     }
 
     @Before
@@ -201,7 +207,7 @@ record Event(long timestamp, String user, String host) {
     public void wipeEnrichPolicies() {
         for (String cluster : allClusters()) {
             cluster(cluster).wipe(Set.of());
-            for (String policy : List.of("hosts", "vendors")) {
+            for (String policy : List.of("hosts", "hosts_local", "vendors")) {
                 if (tolerateErrorsWhenWipingEnrichPolicies()) {
                     try {
                         client(cluster).execute(
@@ -226,6 +232,10 @@ static String enrichHosts(Enrich.Mode mode) {
         return EsqlTestUtils.randomEnrichCommand("hosts", mode, hostPolicy.getMatchField(), hostPolicy.getEnrichFields());
     }
 
+    static String enrichHostsLocal(Enrich.Mode mode) {
+        return EsqlTestUtils.randomEnrichCommand("hosts_local", mode, hostPolicyLocal.getMatchField(), hostPolicyLocal.getEnrichFields());
+    }
+
     static String enrichVendors(Enrich.Mode mode) {
         return EsqlTestUtils.randomEnrichCommand("vendors", mode, vendorPolicy.getMatchField(), vendorPolicy.getEnrichFields());
     }

x-pack/plugin/esql/src/internalClusterTest/java/org/elasticsearch/xpack/esql/action/CrossClusterEnrichIT.java

@@ -110,6 +110,52 @@ public void testWithHostsPolicy() {
         }
     }
 
+    public void testFromRemotesWithCoordPolicy() {
+
+        String query = "FROM *:events | eval ip= TO_STR(host) | "
+            + enrichHostsLocal(Enrich.Mode.COORDINATOR)
+            + " | stats c = COUNT(*) by os | SORT os";
+        try (EsqlQueryResponse resp = runQuery(query, null)) {
+            List<List<Object>> rows = getValuesList(resp);
+            assertThat(
+                rows,
+                equalTo(
+                    List.of(
+                        List.of(1L, "Android"),
+                        List.of(2L, "Linux"),
+                        List.of(4L, "MacOS"),
+                        List.of(3L, "Windows"),
+                        List.of(1L, "iOS"),
+                        Arrays.asList(2L, (String) null)
+                    )
+                )
+            );
+            assertTrue(resp.getExecutionInfo().isCrossClusterSearch());
+        }
+
+        query = "FROM *:events | eval ip= TO_STR(host) | stats by ip | "
+            + enrichHostsLocal(Enrich.Mode.COORDINATOR)
+            + " | stats c = COUNT(*) by os | SORT os";
+        try (EsqlQueryResponse resp = runQuery(query, null)) {
+            List<List<Object>> rows = getValuesList(resp);
+            assertThat(
+                rows,
+                equalTo(
+                    List.of(
+                        List.of(1L, "Android"),
+                        List.of(2L, "Linux"),
+                        List.of(2L, "MacOS"),
+                        List.of(2L, "Windows"),
+                        List.of(1L, "iOS"),
+                        Arrays.asList(2L, (String) null)
+                    )
+                )
+            );
+            assertTrue(resp.getExecutionInfo().isCrossClusterSearch());
+        }
+
+    }
+
     public void testEnrichHostsAggThenEnrichVendorCoordinator() {
         Tuple<Boolean, Boolean> includeCCSMetadata = randomIncludeCCSMetadata();
         Boolean requestIncludeMeta = includeCCSMetadata.v1();