[Libreoffice-bugs] [Bug 120091] Some LO Base views with conversions or casting on datetime fields causing error message "the data content could not be loaded" with MySQL Connector/J 8 (not with with MySQL Connector/J 5)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=120091

jnplg at outlook.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Some fields causing error   |Some LO Base views with
                   |message "the data content   |conversions or casting on
                   |could not be loaded" with   |datetime fields causing
                   |MySQL Connector/J 8.0.11 or |error message "the data
                   |8.0.12 in tables and views  |content could not be
                   |                            |loaded" with MySQL
                   |                            |Connector/J 8 (not with
                   |                            |with MySQL Connector/J 5)

--- Comment #11 from jnplg at outlook.com ---
I did some additional research on this problem : it appears when trying to
access a view which contains a CAST as DATE (or TIME) function on a DATETIME
(or TIMESTAMP) column. 

Here is a short sample : 

1. create a table with a datetime column : 
CREATE TABLE `dt` (`datetime1` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`datetime1`)) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
COLLATE=utf8mb4_0900_ai_ci;

2. insert a value :
INSERT INTO `testcj8`.`dt` (`datetime1`) VALUES ('2018-11-11 11:11:11');

3. create a view on this table, with a "cast as date" function on the datetime
column :
CREATE VIEW `view-dt` AS select `dt`.`datetime1` AS `datetime1`,
cast(`dt`.`datetime1` as date) AS `date1`, cast(`dt`.`datetime1` as time) AS
`time1` from `dt`;

4. access this view : SELECT * FROM `view-dt`;

- If LO base is connected to MySQL with MySQL Connector/J 5, there is no
problem.
- If LO base is connected to MySQL with MySQL Connector/J 8, there is a 
problem : msg "the data could not be loaded".

Please note that the select statement used to create the view can be
successfully executed with both connectors !!!

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/libreoffice-bugs/attachments/20181110/3a749196/attachment-0001.html>