Igor, On Thu, Oct 31, 2013 at 5:33 PM, Igor Tandetnik <i...@tandetnik.org> wrote: > On 10/31/2013 8:22 PM, Igor Korot wrote: >> >> Hi, ALL, >> In the CREATE TRIGGER can I use something like this: >> >> CREATE TRIGGER foo AFTER INSERT >> BEGIN >> IF foo.field1 IS NULL >> UPDATE foo SET field1 = <some_value>; >> ELSE >> UPDATE foo SET field1 = field1 + 1 WHERE field1 > >> new.<value>; >> END; >> >> My concern is if CREATE TRIGER will understand conditionals. > > > No, there is no IF statement in SQLite.
This is bad. > There are other ways to do > operations conditionally. I'd help you with the correct syntax, but I don't > understand what your example is supposed to achieve? And this is good. ;-) > > When you say foo.field1, which row of table foo do you want the value to > come from? When you say new.<value>, a value in which field of the newly > inserted row is this supposed to refer to? Perhaps you could explain what > you are trying to do in English, rather than making up some syntax that > doesn't make sense. What I'm looking for is to do a different processing based on the value that is inserted. When the record is inserted with the field1 as NULL, I want to have the field1 to have value max( field1 ) + 1. When the record inserted have some value in field1, i.e. field1 == 5, I want all records that have field1 > 5 to have field1 to be incremented. So if new record have field1 as 5, so the old record with field1 == 5 will have field1 = 6, field1 will become 7 and so forth. There is no trigger on the updating the record for that table. Thank you. > -- > Igor Tandetnik > > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
