Bwc tests fix

Author: ioanatia

x-pack/plugin/esql/qa/server/multi-clusters/src/javaRestTest/java/org/elasticsearch/xpack/esql/ccq/MultiClusterSpecIT.java

@@ -48,7 +48,9 @@
 import static org.elasticsearch.xpack.esql.CsvTestsDataLoader.CSV_DATASET_MAP;
 import static org.elasticsearch.xpack.esql.CsvTestsDataLoader.ENRICH_SOURCE_INDICES;
 import static org.elasticsearch.xpack.esql.EsqlTestUtils.classpathResources;
+import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.ENABLE_FORK_FOR_REMOTE_INDICES;
 import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.ENABLE_LOOKUP_JOIN_ON_REMOTE;
+import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.FORK_V9;
 import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.INLINESTATS;
 import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.INLINESTATS_V11;
 import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.JOIN_LOOKUP_V12;
@@ -154,6 +156,13 @@ protected void shouldSkipTest(String testName) throws IOException {
         );
         // Tests that do SORT before LOOKUP JOIN - not supported in CCS
         assumeFalse("LOOKUP JOIN after SORT not yet supported in CCS", testName.contains("OnTheCoordinator"));
+
+        if (testCase.requiredCapabilities.contains(FORK_V9.capabilityName())) {
+            assumeTrue(
+                "FORK not yet supported with CCS",
+                hasCapabilities(adminClient(), List.of(ENABLE_FORK_FOR_REMOTE_INDICES.capabilityName()))
+            );
+        }
     }
 
     @Override

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/action/EsqlCapabilities.java

@@ -1411,7 +1411,12 @@ public enum Cap {
         /**
          * URL encoding function.
          */
-        URL_ENCODE(Build.current().isSnapshot());
+        URL_ENCODE(Build.current().isSnapshot()),
+
+        /**
+         * FORK with remote indices
+         */
+        ENABLE_FORK_FOR_REMOTE_INDICES;
 
         private final boolean enabled;