[MDEV-11570] JSON_MERGE returns incorrect result Created: 2016-12-14  Updated: 2016-12-20  Resolved: 2016-12-20

Status: Closed
Project: MariaDB Server
Component/s: JSON
Affects Version/s: 10.2
Fix Version/s: 10.2.3

Type: Bug Priority: Major
Reporter: Elena Stepanova Assignee: Alexey Botchkov
Resolution: Fixed Votes: 0
Labels: None

Issue Links:
Relates
relates to MDEV-9143 JSON_xxx functions Closed

 Description   

MariaDB 10.2

MariaDB [test]>  SELECT JSON_MERGE('[1, 2]', '{"id": 47}');
+------------------------------------+
| JSON_MERGE('[1, 2]', '{"id": 47}') |
+------------------------------------+
| [[1, 2], {"id": 47}]               |
+------------------------------------+
1 row in set (0.00 sec)

MySQL 5.7

MySQL [test]>  SELECT JSON_MERGE('[1, 2]', '{"id": 47}');
+------------------------------------+
| JSON_MERGE('[1, 2]', '{"id": 47}') |
+------------------------------------+
| [1, 2, {"id": 47}]                 |
+------------------------------------+
1 row in set (0.00 sec)

An adjacent array and object are merged by autowrapping the object as an array and merging the two arrays.

https://dev.mysql.com/doc/refman/5.7/en/json-modification-functions.html#function_json-append



 Comments   
Comment by Alexey Botchkov [ 2016-12-20 ]

http://lists.askmonty.org/pipermail/commits/2016-December/010319.html

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