fix rebase issue

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

Author: RyanL1997

core/src/main/java/org/opensearch/sql/calcite/CalciteRelNodeVisitor.java

@@ -125,7 +125,7 @@
 import org.opensearch.sql.exception.SemanticCheckException;
 import org.opensearch.sql.expression.function.BuiltinFunctionName;
 import org.opensearch.sql.expression.function.PPLFuncImpTable;
-import org.opensearch.sql.expression.parse.RegexExpression;
+import org.opensearch.sql.expression.parse.RegexCommonUtils;
 import org.opensearch.sql.utils.ParseUtils;
 
 public class CalciteRelNodeVisitor extends AbstractNodeVisitor<RelNode, CalcitePlanContext> {
@@ -210,7 +210,7 @@ public RelNode visitRex(Rex node, CalcitePlanContext context) {
     RexNode fieldRex = rexVisitor.analyze(node.getField(), context);
     String patternStr = (String) node.getPattern().getValue();
 
-    List<String> namedGroups = RegexExpression.getNamedGroupCandidates(patternStr);
+    List<String> namedGroups = RegexCommonUtils.getNamedGroupCandidates(patternStr);
 
     if (namedGroups.isEmpty()) {
       throw new IllegalArgumentException(