Re: [sqlite] Adding Custom Column Data Types
Thanks, Everyone. I think I understand this enough to at least attempt to test it, unfortunately, it will probably be a couple of days before them. I will let you know the results... Mike On Wed, Jan 28, 2009 at 2:24 AM, MikeW wrote: > Mike McGonagle writes: > >> >> Hello all, >> >> I am in the process of integrating SQLite into a multimedia >> environment/programming language. One thing that I would like to be >> able to do is support all the various datatypes in this language, and >> one in particular is a list of other primitive datatypes. Is there a >> way to add a "user-type" so that when 'sqlite3_column_type' is called, >> it would return a unique ID for this "user-type"? >> >> I am hoping that I can use this to do some further processing to the >> stored data to convert it back into the native format the environment >> uses. >> >> Or is there a better way? >> >> Thanks, >> >> Mike >> > > An alternative is to use the sqlite3_column_decltype() > http://www.sqlite.org/c3ref/column_decltype.html > function to read back the string name with which the column > was originally created. > > MikeW > > > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > -- Peace may sound simple—one beautiful word— but it requires everything we have, every quality, every strength, every dream, every high ideal. —Yehudi Menuhin (1916–1999), musician ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Adding Custom Column Data Types
Mike McGonagle writes: > > Hello all, > > I am in the process of integrating SQLite into a multimedia > environment/programming language. One thing that I would like to be > able to do is support all the various datatypes in this language, and > one in particular is a list of other primitive datatypes. Is there a > way to add a "user-type" so that when 'sqlite3_column_type' is called, > it would return a unique ID for this "user-type"? > > I am hoping that I can use this to do some further processing to the > stored data to convert it back into the native format the environment > uses. > > Or is there a better way? > > Thanks, > > Mike > An alternative is to use the sqlite3_column_decltype() http://www.sqlite.org/c3ref/column_decltype.html function to read back the string name with which the column was originally created. MikeW ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Adding Custom Column Data Types
We do thisby usig the Sqlite "Declared Type" (which can be anything you choose) and intercepting it in a layer of software between Sqlite and the application language manager. For example we have a decimal number type, a date type etc. The data is stored as Sqlite TEXT or FLOAT but the interface handle transformatiuon into the decimal or date format exopecrted by the host langauge processor. MikeW wrote: > Mike McGonagle writes: > > >> Hello all, >> >> I am in the process of integrating SQLite into a multimedia >> environment/programming language. One thing that I would like to be >> able to do is support all the various datatypes in this language, and >> one in particular is a list of other primitive datatypes. Is there a >> way to add a "user-type" so that when 'sqlite3_column_type' is called, >> it would return a unique ID for this "user-type"? >> >> I am hoping that I can use this to do some further processing to the >> stored data to convert it back into the native format the environment >> uses. >> >> Or is there a better way? >> >> Thanks, >> >> Mike >> >> > > Another separate field for the data type ? > > MikeW > > == gmane padding === > == gmane padding === > == gmane padding === > == gmane padding === > == gmane padding === > > > > ___ > 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
Re: [sqlite] Adding Custom Column Data Types
Mike McGonagle writes: > > Hello all, > > I am in the process of integrating SQLite into a multimedia > environment/programming language. One thing that I would like to be > able to do is support all the various datatypes in this language, and > one in particular is a list of other primitive datatypes. Is there a > way to add a "user-type" so that when 'sqlite3_column_type' is called, > it would return a unique ID for this "user-type"? > > I am hoping that I can use this to do some further processing to the > stored data to convert it back into the native format the environment > uses. > > Or is there a better way? > > Thanks, > > Mike > Another separate field for the data type ? MikeW == gmane padding === == gmane padding === == gmane padding === == gmane padding === == gmane padding === ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Adding Custom Column Data Types
Hello all, I am in the process of integrating SQLite into a multimedia environment/programming language. One thing that I would like to be able to do is support all the various datatypes in this language, and one in particular is a list of other primitive datatypes. Is there a way to add a "user-type" so that when 'sqlite3_column_type' is called, it would return a unique ID for this "user-type"? I am hoping that I can use this to do some further processing to the stored data to convert it back into the native format the environment uses. Or is there a better way? Thanks, Mike -- Peace may sound simple—one beautiful word— but it requires everything we have, every quality, every strength, every dream, every high ideal. —Yehudi Menuhin (1916–1999), musician ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
