Extract with mysql - mysql

Question

I have a table (incident) with a column (update_Action) that contains information. Among this information the names are enclosed in parenthesis.
06/01/15 09:49:17 Tunisia (Hamed.Ghabi):
05/01/15 13:14:11 Tunisia (sabri.zayet):
reset des TREs 05/01/15 09:38:50 Tunisia (Hamed.Ghabi):
Pb persiste. Cdt,Hamed 02/01/15 14:37:45 Tunisia (khaled.rajhi):
Restart cell Cdt, Khaled
Question:
my goal is to extract these names is to store them in another column (intervenants) in the same table.
update incident set intervenants=
(substring(Update_Action,locate('(',Update_Action),locate(')',Update_Action)))
where Status='Closed'
But I got the following result: (Hamed.Ghabi): 05/01/15 13:14:11 Tunisi, instead of: Hamed.Ghabi,Sabri.Zayet,Khaled.Rajhi.
picture of the table:
!06/01/15 09:49:17 Tunisia (Hamed.Ghabi):
05/01/15 13:14:11 Tunisia (sabri.zayet):
reset des TREs
05/01/15 09:38:50 Tunisia (Hamed.Ghabi):
Pb persiste.
Cdt,Hamed
02/01/15 14:37:45 Tunisia (khaled.rajhi):
Restart cell
Cdt, Khaled
05/01/15 09:42:40 Tunisia (Hamed.Ghabi):
02/01/15 14:38:00 Tunisia (khaled.rajhi):
Restart cell
Cdt, Khaled
26/01/15 09:14:56 Tunisia (Hamed.Ghabi):
23/01/15 11:30:46 Tunisia (walid.hadjtaieb):
prière de vérifier l’état suite intervention maintenance.
il parait que le problème est résolu (en attache)
13/01/15 11:43:19 Tunisia (nabil.zarrad):
Merci d'attacher le résultat des mesures PIM sur SM9 (pour garder l'historique des actions).
12/01/15 16:35:10 Tunisia (fethi.nasri):
Résultat mesure PIM envoyé.
07/01/15 17:53:49 Tunisia (walid.hadjtaieb):
prière de planifier une mesure PIM sur S2
06/01/15 09:46:34 Tunisia (

Answer 1

You could create a function to extract the text in the parenthesis:
EDIT: removed an unnecessary variable + general cleanup.
DELIMITER $$
CREATE FUNCTION `extractWordInParenthesis`(strIn varchar(500))
RETURNS varchar(500)
BEGIN
declare textString varchar(500) default strIn;
declare extractedString varchar(500) default '';
declare newOccurence varchar(500) default '';
while length(textString) <> length(replace(textString,')',''))
do
set newOccurence = substr(textString,
locate('(', textString)+1,
locate(')', textString)-locate('(', textString)-1);
-- check if the specific occurence have already been found
if length(extractedString) = length(replace(extractedString,newOccurence,''))
then
set extractedString =
concat(extractedString, ',', newOccurence);
end if;
set textString = substr(textString,locate(')', textString)+1);
end while;
RETURN substr(extractedString,2);
END$$
DELIMITER ;
This would be called like:
select extractWordInParenthesis(Update_Action) from incident
where Status = 'Closed';
And the update:
update incident set intervenants = extractWordInParenthesis(Update_Action)
where Status = 'Closed';