MDEV-22844 JSON_ARRAYAGG is limited by group_concat_max_len.

Warning message and function result fixed

1 files changed, 2 insertions, 0 deletions

diff --git a/sql/item_sum.h b/sql/item_sum.h
index 118b5b958f3..dc520ce2578 100644
--- a/sql/item_sum.h
+++ b/sql/item_sum.h
@@ -1941,6 +1941,8 @@ protected:
   virtual String *get_str_from_field(Item *i, Field *f, String *tmp,
                                      const uchar *key, size_t offset)
     { return f->val_str(tmp, key + offset); }
+  virtual void cut_max_length(String *result,
+                              uint old_length, uint max_length) const;
 public:
   // Methods used by ColumnStore
   bool get_distinct() const { return distinct; }