fix ccr test

Signed-off-by: Jialiang Liang <jiallian@amazon.com>

Author: RyanL1997

integ-test/src/test/java/org/opensearch/sql/security/CalciteCrossClusterSearchIT.java

@@ -15,6 +15,7 @@
 import java.io.IOException;
 import org.apache.commons.text.StringEscapeUtils;
 import org.json.JSONObject;
+import org.junit.Assert;
 import org.junit.Test;
 
 /** Cross Cluster Search tests with Calcite enabled for enhanced fields features. */
@@ -477,9 +478,15 @@ public void testCrossClusterHighlightWildcard() throws IOException {
     JSONObject result =
         executeQuery(
             String.format(
-                "search source=%s | highlight * | fields firstname, _highlight",
+                "search source=%s \\\"Hattie\\\" | highlight * | fields firstname",
                 TEST_INDEX_BANK_REMOTE));
-    verifyColumn(result, columnName("firstname"), columnName("_highlight"));
+    verifySchema(result, schema("firstname", "string"));
+    verifyDataRows(result, rows("Hattie"));
+    var highlights = result.getJSONArray("highlights");
+    var highlight = highlights.getJSONObject(0);
+    Assert.assertTrue(
+        "Highlight should contain <em>Hattie</em>",
+        highlight.getJSONArray("firstname").getString(0).contains("<em>Hattie</em>"));
   }
 
   @Test