On 11 Nov 2011, at 6:09pm, Nico Williams wrote: > blob = blob should be a binary comparison > > blob = string should be a string comparison > > blob LIKE pattern should either treat the blob as a string or not, but > I don't see why either behavior should imply that blob = blob should > be anything but a binary comparison or blob = string anything other > than a string comparison. > > I personally see no reason why LIKE shouldn't apply the pattern to the > whole blob, but GLOB and REGEXP must apply only to strings (or BLOBs > cast to TEXT).
You know, actually the only one of those I think should work is the first: you can compare two blobs for identity. Anything which treats a BLOB like a string should yield an error of some kind (null ?). I think of a BLOB as a black box of some kind: you treat it as a whole, and don't look inside it. If you want parts of it you need to know whether to treat it as a string, a float, a colour, etc.. Simon. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
