[MDEV-31721] Cursor protocol increases the counter of "Empty_queries" for select - Jira

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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

relates to

MDEV-31005 Make working cursor-protocol

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