| Subject | ODP: Re: [firebird-support] how to suppress dashes in query results |
|---|---|
| Author | liviuslivius |
| Post date | 2016-02-12T10:19:34Z |
hi,
better is expression index here
regards,
Karol Bieniaszewski
-------- Oryginalna wiadomość --------
Od: "Svein Erling Tysvær setysvar@... [firebird-support]" <firebird-support@yahoogroups.com>
Data: 12.02.2016 08:52 (GMT+01:00)
Do: firebird-support@yahoogroups.com
Temat: Re: [firebird-support] how to suppress dashes in query results
Using REPLACE in the WHERE clause means no index. If this is a huge table and you have no other selective WHERE criteria, I would recommend that you rather add another (indexed) field, have a trigger that is ACTIVE BEFORE INSERT OR UPDATE that sets this field using REPLACE, and then simply use this new proxy column in your WHERE clause. If it is a tiny table or if you always have other selective and indexed criteria, then doing things only in the WHERE clause is fine.
Set
2016-02-12 2:57 GMT+01:00 homer@... [firebird-support] <firebird-support@yahoogroups.com>:
Users can enter values with dashes (-) in random locations. I don't know where they might put them. I need to select a record using a where clause that doesn't have those dashes. For example, the user might record an insurance policy number as 12-345678-01 or 123-456-789-01. All I will know are the number, and not where they put the dashes. Is there a way to suppress the dashes in the Select Clause, or the Where Clause? This is being done in a Delphi 2007 program using IBDAC.
It would be nice if I could do something like ... SELECT * WHERE HIDE('-',UsersField) = 'MyValue'
Or the equivalent in the Select statement.