bug fixed for not expr output.

src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java

@@ -1526,6 +1526,8 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
         if (expr instanceof SQLBinaryOpExpr) {
             SQLBinaryOpExpr binaryOpExpr = (SQLBinaryOpExpr) expr;
             needQuote = binaryOpExpr.getOperator().isLogical();
+        } else if (expr instanceof SQLInListExpr || expr instanceof SQLNotExpr) {
+            needQuote = true;
         }
 
         if (needQuote) {

src/main/java/com/alibaba/druid/sql/visitor/VisitorFeature.java

@@ -23,7 +23,12 @@ public enum  VisitorFeature {
     OutputUseInsertValueClauseOriginalString,
     OutputSkipSelectListCacheString,
     OutputSkipInsertColumnsString,
-    OutputParameterizedQuesUnMergeInList
+    OutputParameterizedQuesUnMergeInList,
+
+    /**
+     * @deprecated
+     */
+    OutputKeepParenthesisWhenNotExpr
     ;
 
     private VisitorFeature(){