[8.x] ESQL: Fix repeated rows in LOOKUP JOIN with a lookup index in the FROM (#119350) (#119454)

Backports the following commits to 8.x:
 - ESQL: Fix repeated rows in LOOKUP JOIN with a lookup index in the FROM (#119350)

Author: ivancea

x-pack/plugin/esql/qa/security/src/javaRestTest/java/org/elasticsearch/xpack/esql/EsqlSecurityIT.java

@@ -548,7 +548,7 @@ record Listen(long timestamp, String songId, double duration) {
     public void testLookupJoinIndexAllowed() throws Exception {
         assumeTrue(
             "Requires LOOKUP JOIN capability",
-            EsqlSpecTestCase.hasCapabilities(adminClient(), List.of(EsqlCapabilities.Cap.JOIN_LOOKUP_V9.capabilityName()))
+            EsqlSpecTestCase.hasCapabilities(adminClient(), List.of(EsqlCapabilities.Cap.JOIN_LOOKUP_V10.capabilityName()))
         );
 
         Response resp = runESQLCommand(
@@ -587,7 +587,7 @@ public void testLookupJoinIndexAllowed() throws Exception {
     public void testLookupJoinIndexForbidden() throws Exception {
         assumeTrue(
             "Requires LOOKUP JOIN capability",
-            EsqlSpecTestCase.hasCapabilities(adminClient(), List.of(EsqlCapabilities.Cap.JOIN_LOOKUP_V9.capabilityName()))
+            EsqlSpecTestCase.hasCapabilities(adminClient(), List.of(EsqlCapabilities.Cap.JOIN_LOOKUP_V10.capabilityName()))
         );
 
         var resp = expectThrows(

x-pack/plugin/esql/qa/server/mixed-cluster/src/javaRestTest/java/org/elasticsearch/xpack/esql/qa/mixed/MixedClusterEsqlSpecIT.java

@@ -21,7 +21,7 @@
 import java.util.List;
 
 import static org.elasticsearch.xpack.esql.CsvTestUtils.isEnabled;
-import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.JOIN_LOOKUP_V9;
+import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.JOIN_LOOKUP_V10;
 import static org.elasticsearch.xpack.esql.qa.rest.EsqlSpecTestCase.Mode.ASYNC;
 
 public class MixedClusterEsqlSpecIT extends EsqlSpecTestCase {
@@ -96,7 +96,7 @@ protected boolean supportsInferenceTestService() {
 
     @Override
     protected boolean supportsIndexModeLookup() throws IOException {
-        return hasCapabilities(List.of(JOIN_LOOKUP_V9.capabilityName()));
+        return hasCapabilities(List.of(JOIN_LOOKUP_V10.capabilityName()));
     }
 
     @Override

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

@@ -48,7 +48,7 @@
 import static org.elasticsearch.xpack.esql.EsqlTestUtils.classpathResources;
 import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.INLINESTATS;
 import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.INLINESTATS_V2;
-import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.JOIN_LOOKUP_V9;
+import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.JOIN_LOOKUP_V10;
 import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.JOIN_PLANNING_V1;
 import static org.elasticsearch.xpack.esql.action.EsqlCapabilities.Cap.METADATA_FIELDS_REMOTE_TEST;
 import static org.elasticsearch.xpack.esql.qa.rest.EsqlSpecTestCase.Mode.SYNC;
@@ -124,7 +124,7 @@ protected void shouldSkipTest(String testName) throws IOException {
         assumeFalse("INLINESTATS not yet supported in CCS", testCase.requiredCapabilities.contains(INLINESTATS.capabilityName()));
         assumeFalse("INLINESTATS not yet supported in CCS", testCase.requiredCapabilities.contains(INLINESTATS_V2.capabilityName()));
         assumeFalse("INLINESTATS not yet supported in CCS", testCase.requiredCapabilities.contains(JOIN_PLANNING_V1.capabilityName()));
-        assumeFalse("LOOKUP JOIN not yet supported in CCS", testCase.requiredCapabilities.contains(JOIN_LOOKUP_V9.capabilityName()));
+        assumeFalse("LOOKUP JOIN not yet supported in CCS", testCase.requiredCapabilities.contains(JOIN_LOOKUP_V10.capabilityName()));
     }
 
     private TestFeatureService remoteFeaturesService() throws IOException {
@@ -283,8 +283,8 @@ protected boolean supportsInferenceTestService() {
 
     @Override
     protected boolean supportsIndexModeLookup() throws IOException {
-        // CCS does not yet support JOIN_LOOKUP_V9 and clusters falsely report they have this capability
-        // return hasCapabilities(List.of(JOIN_LOOKUP_V9.capabilityName()));
+        // CCS does not yet support JOIN_LOOKUP_V10 and clusters falsely report they have this capability
+        // return hasCapabilities(List.of(JOIN_LOOKUP_V10.capabilityName()));
         return false;
     }
 }

x-pack/plugin/esql/qa/server/src/main/java/org/elasticsearch/xpack/esql/qa/rest/RequestIndexFilteringTestCase.java

@@ -221,7 +221,7 @@ public void testIndicesDontExist() throws IOException {
         assertThat(e.getMessage(), containsString("index_not_found_exception"));
         assertThat(e.getMessage(), containsString("no such index [foo]"));
 
-        if (EsqlCapabilities.Cap.JOIN_LOOKUP_V9.isEnabled()) {
+        if (EsqlCapabilities.Cap.JOIN_LOOKUP_V10.isEnabled()) {
             e = expectThrows(
                 ResponseException.class,
                 () -> runEsql(timestampFilter("gte", "2020-01-01").query("FROM test1 | LOOKUP JOIN foo ON id1"))