set dolphin.use_const_value_as_colname = false;
select 'a';
select 'a' 'b';
select 'ca' between 'b' and 'c' 'd'; -- same as select 'ca' between 'b' and 'cd';
select 'ca' between 'b' and 'cd';
select hex('1') 'a';
select current_schema() 'a';
select current_schema 'a';
select 'a' 'a' like 'a' 'a'; -- same as select 'aa' like 'aa';
select 'aa' like 'a' 'a';
select '3' mod '2' '3';
select '3' mod '23';
select '1' + '2' '3';