[sqlite] reuse of named parameters within a single statement
Sorry if this is a repeat but I am having a heck of a time figuring out a definitive answer to a this question on the list. Certainly it is not addressed in the documentation. Is the following valid string to prepare: SELECT @myparam, @myparam, @myparam, @myotherparam If so, which is it equivalent to: A - SELECT ?1, ?1, ?1, ?2 or B - SELECT ?1, ?2, ?3, ?4 Aron -- Aron Rubin Handy Husband Daddy Jungle Gym Senior Engineer ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] reuse of named parameters within a single statement
It would be great to include SELECT @myparam, @myparam, @myotherparam, @myparam is it equivalent to SELECT ?1, ?1, ?2, ?1 in the documentation on parameters (in expressions). Thank you, Aron On 5/4/10, Jay A. Kreibich j...@kreibi.ch wrote: On Tue, May 04, 2010 at 01:48:52PM -0400, Aron Rubin scratched on the wall: Sorry if this is a repeat but I am having a heck of a time figuring out a definitive answer to a this question on the list. Certainly it is not addressed in the documentation. Is the following valid string to prepare: SELECT @myparam, @myparam, @myparam, @myotherparam If so, which is it equivalent to: A - SELECT ?1, ?1, ?1, ?2 or B - SELECT ?1, ?2, ?3, ?4 A. -- Jay A. Kreibich J A Y @ K R E I B I.C H Our opponent is an alien starship packed with atomic bombs. We have a protractor. I'll go home and see if I can scrounge up a ruler and a piece of string. --from Anathem by Neal Stephenson ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users -- Aron Rubin Handy Husband Daddy Jungle Gym Senior Engineer ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Small change to support poor man's extended features
If I could have a SQL function that returned an id of the current frame I could create poor man's variables. In turn that would allow me to create return locations for stored procedure triggers and branching. The id would need to be unique against any parallel executions. -- Aron Rubin Handy Husband Daddy Jungle Gym Senior Engineer ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Small change to support poor man's extended features
On Tue, May 4, 2010 at 9:00 PM, Roger Binns rog...@rogerbinns.com wrote: On 05/04/2010 03:50 PM, Aron Rubin wrote: If I could have a SQL function that returned an id of the current frame I could create poor man's variables. You'll need to be more specific about what you mean here. Give an example of the code you would like to write. The only use of the word frame I know of in this context is stack frame. It is certainly possible to do what you ask in Python (sys.getframe) but SQLite is in C and that doesn't require physical frames or return locations. Most execution environments that support calling including C and Sqlite use a stack of frames. Looking at the Sqlite code, VDBE maintains a stack of frames. I am suggesting that these frames are assigned an id that is unique for that parallel execution. Since I do not know the rules, present or planned, for parallelism in Sqlite I cannot clearly define what those ids are. If each parallel path, i.e. database open from programs, is assigned a unique id then the combination of that id and the call depth would be sufficient for my purposes. Aron -- Aron Rubin Handy Husband Daddy Jungle Gym Senior Engineer ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
