bug fixed for SQLUtils.format mysql sharding sql.

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java

@@ -189,7 +189,7 @@ public class MySqlOutputVisitor extends SQLASTOutputVisitor implements MySqlASTV
     }
 
     public boolean isShardingSupport() {
-        return shardingSupport;
+        return parameterized && shardingSupport;
     }
 
     public void setShardingSupport(boolean shardingSupport) {

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

@@ -631,7 +631,7 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter implements Paramet
     }
 
     private boolean printName(SQLName x, String name) {
-        boolean shardingSupport = this.shardingSupport;
+        boolean shardingSupport = this.shardingSupport && parameterized;
         if (shardingSupport) {
             SQLObject parent = x.getParent();
             shardingSupport = parent instanceof SQLExprTableSource || parent instanceof SQLPropertyExpr;