[MDEV-31721] Cursor protocol increases the counter of "Empty_queries" for select Created: 2023-07-17  Updated: 2023-11-28

Status: Open
Project: MariaDB Server
Component/s: None
Affects Version/s: 10.4, 10.5, 10.6, 10.9, 10.10, 11.0, 11.1, 11.2
Fix Version/s: 10.4, 10.5, 10.6, 11.0, 11.1, 11.2

Type: Bug Priority: Major
Reporter: Lena Startseva Assignee: Oleksandr Byelkin
Resolution: Unresolved Votes: 0
Labels: None

Issue Links:
Relates
relates to MDEV-31005 Make working cursor-protocol Stalled

 Description   

Testcase (run MTR test with --cursor-protocol):

create table t1 (a int);
 
insert into t1 values (1);
 
select count(*) from t1;
 
select * from t1;
 
select * from t1 limit 0;
 
show status like "Empty_queries";
 
drop table t1;

Expected result:

show status like "Empty_queries";
 
Variable_name	Value
 
Empty_queries	1

Actual result:

show status like "Empty_queries";
 
Variable_name	Value
 
Empty_queries	3


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