bugfix and fix UTs

Author: julian-elastic

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/parser/ExpressionBuilder.java

@@ -789,7 +789,7 @@ public Expression visitRlikeListExpression(EsqlBaseParser.RlikeListExpressionCon
         Expression left = expression(ctx.valueExpression());
         List<RLikePattern> rLikePatterns = ctx.string()
             .stream()
-            .map(x -> new RLikePattern(visitString(x).fold(FoldContext.small()).toString()))
+            .map(x -> new RLikePattern(BytesRefs.toString(visitString(x).fold(FoldContext.small()))))
             .toList();
         // for now we will use the old WildcardLike function for one argument case to allow compatibility in mixed version deployments
         Expression e = rLikePatterns.size() == 1

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/CsvTests.java

@@ -171,7 +171,7 @@
  *         index emits documents a fair random order. Multi-shard and multi-node tests doubly so.</li>
  * </ul>
  */
-@TestLogging(value = "org.elasticsearch.xpack.esql:TRACE,org.elasticsearch.compute:TRACE", reason = "debug")
+// @TestLogging(value = "org.elasticsearch.xpack.esql:TRACE,org.elasticsearch.compute:TRACE", reason = "debug")
 public class CsvTests extends ESTestCase {
 
     private static final Logger LOGGER = LogManager.getLogger(CsvTests.class);

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/parser/StatementParserTests.java

@@ -1227,7 +1227,7 @@ public void testLikeRLike() {
         assertEquals(".*bar.*", rlike.pattern().asJavaRegex());
 
         expectError("from a | where foo like 12", "no viable alternative at input 'foo like 12'");
-        expectError("from a | where foo rlike 12", "mismatched input '12'");
+        expectError("from a | where foo rlike 12", "no viable alternative at input 'foo rlike 12'");
 
         expectError(
             "from a | where foo like \"(?i)(^|[^a-zA-Z0-9_-])nmap($|\\\\.)\"",