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#
# MDEV-31496 Make optimizer handle UCASE(varchar_col)=...
# Check the coverage in optimizer trace.
#
--source include/not_embedded.inc
--source include/have_sequence.inc
create table t1 (
col1 varchar(32),
col2 varchar(32),
key(col1),
key(col2)
) collate utf8mb3_general_ci;
insert into t1
select
concat('A-', seq),
concat('A-', seq)
from seq_1_to_100;
set
@tmp_ot= @@optimizer_trace,
@tmp_os=@@optimizer_switch,
optimizer_switch='sargable_casefold=on',
optimizer_trace=1;
explain select * from t1 where 'abc'=upper(col1);
select
json_detailed(json_extract(trace, '$**.sargable_casefold_removal')) as JS
from information_schema.optimizer_trace;
explain select * from t1 where ucase(col2)=upper(col1);
select
json_detailed(json_extract(trace, '$**.sargable_casefold_removal')) as JS
from information_schema.optimizer_trace;
explain
select * from t1 where upper(col1) IN ('A-3','A-4','a-5');
--echo # Will show the rewrite:
select
json_detailed(json_extract(trace, '$**.sargable_casefold_removal')) as JS
from information_schema.optimizer_trace;
set
optimizer_trace=@tmp_ot,
optimizer_switch=@tmp_os;
drop table t1;
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