Fix nested PostgreSQL composite field access after cast (#2404)

Author: dengliming

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -7009,8 +7009,8 @@ Expression PrimaryExpression() #PrimaryExpression:
             }
 
 
-            // RowGet Expression
-            [ LOOKAHEAD(2) "." tmp=RelObjectNameExt() { retval = new RowGetExpression(retval, tmp); }]
+            // RowGet Expressions
+            ( LOOKAHEAD(2) "." tmp=RelObjectNameExt() { retval = new RowGetExpression(retval, tmp); } )*
         )
     )
 

src/test/java/net/sf/jsqlparser/expression/CastExpressionTest.java

@@ -9,14 +9,15 @@
  */
 package net.sf.jsqlparser.expression;
 
+import static net.sf.jsqlparser.test.TestUtils.assertSqlCanBeParsedAndDeparsed;
+
 import net.sf.jsqlparser.JSQLParserException;
+import net.sf.jsqlparser.expression.operators.relational.ParenthesedExpressionList;
 import net.sf.jsqlparser.statement.select.PlainSelect;
 import net.sf.jsqlparser.test.TestUtils;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
-import static net.sf.jsqlparser.test.TestUtils.assertSqlCanBeParsedAndDeparsed;
-
 /**
  *
  * @author <a href="mailto:andreas@manticore-projects.com">Andreas Reichel</a>
@@ -114,4 +115,29 @@ void testDateTimeCast() throws JSQLParserException {
                 + "as time_tstz;";
         assertSqlCanBeParsedAndDeparsed(sqlStr, true);
     }
+
+    @Test
+    void testNestedCompositeTypeCastIssue2341() throws JSQLParserException {
+        String sqlStr = "SELECT\n"
+                + "  (product_data::product_info_similarity).info.category AS category,\n"
+                + "  COUNT(*) AS num_products\n"
+                + "FROM products\n"
+                + "GROUP BY (product_data::product_info_similarity).info.category;";
+        PlainSelect select = (PlainSelect) TestUtils.assertSqlCanBeParsedAndDeparsed(sqlStr, true);
+
+        RowGetExpression categoryAccess =
+                Assertions.assertInstanceOf(RowGetExpression.class,
+                        select.getSelectItem(0).getExpression());
+        Assertions.assertEquals("category", categoryAccess.getColumnName());
+
+        RowGetExpression infoAccess = Assertions.assertInstanceOf(RowGetExpression.class,
+                categoryAccess.getExpression());
+        Assertions.assertEquals("info", infoAccess.getColumnName());
+
+        ParenthesedExpressionList<?> parenthesedCast =
+                Assertions.assertInstanceOf(ParenthesedExpressionList.class,
+                        infoAccess.getExpression());
+        Assertions.assertEquals(1, parenthesedCast.size());
+        Assertions.assertInstanceOf(CastExpression.class, parenthesedCast.get(0));
+    }
 }