I use DataGrip (2018.2) connect to MySQL cluster via ProxySQL, then I try some query and I got following result:

The table DDL:
create table django_content_type
(
id int auto_increment primary key,
app_label varchar(100) not null,
model varchar(100) not null,
constraint django_content_type_app_label_model_76bd3d3b_uniq
unique (app_label, model)
);
I have tried other methods, such as: DataGrip connect to MySQL directly, mysql client (terminal) connect to ProxySQL.... but everything look good.
DataGrip is this, right?
https://www.jetbrains.com/datagrip/
I will try to reproduce it.
Yes! It is or any JetBrains IDEs (PyCharm, IntelliJ,...) with database plugin.
same problem here
resolved here https://github.com/sysown/proxysql/issues/1192#issuecomment-404814889
Added flag CLIENT_LONG_FLAG to CapabilityFlags in 1.4.12 and 2.0.0.
Certain libraries do not need that (C API for example), but others seems to rely on it.
Most helpful comment
DataGrip is this, right?
https://www.jetbrains.com/datagrip/
I will try to reproduce it.