bug fixed for sql wall.

src/main/java/com/alibaba/druid/sql/parser/SQLExprParser.java

@@ -2956,7 +2956,7 @@ public class SQLExprParser extends SQLParser {
         }
 
         SQLSelectItem selectItem = new SQLSelectItem(expr, alias, connectByRoot);
-        if (lexer.token == Token.HINT) {
+        if (lexer.token == Token.HINT && !lexer.isEnabled(SQLParserFeature.StrictForWall)) {
             String comment = "/*" + lexer.stringVal() + "*/";
             selectItem.addAfterComment(comment);
             lexer.nextToken();

src/main/java/com/alibaba/druid/sql/parser/SQLParserFeature.java

@@ -21,7 +21,8 @@ public enum SQLParserFeature {
     EnableSQLBinaryOpExprGroup,
     OptimizedForParameterized,
     KeepComments,
-    SkipComments
+    SkipComments,
+    StrictForWall
     ;
 
     private SQLParserFeature(){

src/main/java/com/alibaba/druid/wall/spi/MySqlWallProvider.java

@@ -39,7 +39,9 @@ public class MySqlWallProvider extends WallProvider {
 
     @Override
     public SQLStatementParser createParser(String sql) {
-        return new MySqlStatementParser(sql, SQLParserFeature.EnableSQLBinaryOpExprGroup
+        return new MySqlStatementParser(sql
+                , SQLParserFeature.EnableSQLBinaryOpExprGroup
+                , SQLParserFeature.StrictForWall
         );
     }