Question

I’m trying to test out a function (in this case – regexp_replace(tvalue,'([[:cntrl:]])’,”)) and was wondering if there is a way to go through multiple input data to a function in one SQL query?

basically i want to see that a function is replacing non-printable characters, my idea was something like the below:

my pseudocode:

with testdata as (select 
'teststring1',
'$kfjs',
chr(10)||'test',
'    <>',
null,
'[{}&,''/\'
from dual)
select tvalue, regexp_replace(tvalue,'([[:cntrl:]])','')  from testdata
where tvalue <> regexp_replace(tvalue,'([[:cntrl:]])','');

Answer 1

with testdata as (
  select 'teststring1' as tvalue from dual
  union all
  select '$kfjs' from dual
  union all
  select 'str1' || chr(10) || 'str2' from dual
  union all
  select '    <>' from dual
  union all
  select null from dual
  union all
  select '[{}&,''/' from dual
)
select rownum, tvalue, regexp_replace(tvalue, '([[:cntrl:]])', '') from testdata
where tvalue <> regexp_replace(tvalue, '([[:cntrl:]])', '');