Adapt regex with lookahead to oracle db format - sql

Question

After the useful answers on my previous question (see How do I create a regex to avoid a repeated number with optional hyphen?) we reached a solution that matched my needings.
The final result was:
^(?!(\d)(?:-?\1)*$)\d{2}-?\d{7}$
The above regex excludes these data:
00-0000000 and 000000000
11-1111111 and 111111111
22-2222222 and 222222222
...
99-9999999 and 999999999
Note that 22-2222221 is valid.
Note also that the position of the hyphen can be anywhere after the first digit and before the last one
Now that everything seemd to work fine we noticed that this pattern is not compatible with the oracle database REGEXP LIKE command.
Any suggestion on how to adapt it?
Thanks in advance.
I read here Oracle regular expression replacement for negative lookahead/lookbehind and the solution provided doesn't seem to work for me.

Answer 1

Given you comment:
the hyphen can be anywhere after the first digit and before the last one
You can do it all without regular expressions using:
SELECT *
FROM table_name
WHERE -- Check that the value as the correct length
LENGTH(value) IN (9, 10)
-- Check that the value has the correct length without hyphens
AND LENGTH(REPLACE(value, '-')) = 9
-- Check that the value has only digits or hyphens
AND TRANSLATE(value, 'a-0123456789', 'a') IS NULL
-- Check that all the characters are not either hyphens or the same as the
-- first character
AND TRANSLATE(value, 'a-' || SUBSTR(value, 1, 1), 'a') IS NOT NULL;
If the hyphen will always be the 3rd character (if it is present) then:
SELECT *
FROM table_name
WHERE -- Check that the value has the correct format
( value LIKE '_________' OR value LIKE '__-_______' )
-- Check that the other characters are digits
AND TRANSLATE(
SUBSTR(value, 1, 2) || SUBSTR(value, -7),
'a0123456789',
'a'
) IS NULL
-- Check that all the characters are not either hyphens or the same as the
-- first character
AND TRANSLATE(value, 'a-' || SUBSTR(value, 1, 1), 'a') IS NOT NULL;
If you want to use regular expressions then you will need two regular expressions:
SELECT *
FROM table_name
WHERE REGEXP_LIKE(value, '^\d{2}-?\d{7}$')
AND NOT REGEXP_LIKE(value, '^(\d)\1-?\1{7}$');
or for hyphens anywhere:
SELECT *
FROM table_name
WHERE REGEXP_LIKE(value, '^\d+-?\d+$')
AND REGEXP_LIKE(value, '^[0-9-]{9,10}$')
AND NOT REGEXP_LIKE(value, '^(\d)(-?\1){8}$');
Alternatively, you can enable Java inside the database and use look-ahead via a Java method and the regular expression:
^(?!(\d)(-?\1){8}$)(?=(\d{9}|[0-9-]{10})$)\d+-?\d+$
fiddle