Proposal to Change the Behavior of JSON_MERGE

In MySQL 5.7, one of the most popular new features is the introduction of JSON:

  1. The JSON data type
  2. A set of 20 functions to search, manipulate and create JSON documents
  3. Virtual Columns for JSON indexing

In MySQL 8.0 we plan to extend this functionality (for example: with the addition of JSON aggregate functions), but we are also considering changing the behaviour of one of the existing functions.…