Re: [sqlite] BLOB concatenation?
> > SELECT quote(cast(X'5445' || X'5354' as blob)); > > Indeed, it seems to work. Thanks! But beware that it's not guaranteed to work if blobs have embedded '\0' character (as it's actually not guaranteed to work if blobs don't have a valid UTF-8/UTF-16 text). Although I believe it works now and wasn't changed for a long time. But keep that in mind just in case. Pavel On Fri, Jan 20, 2012 at 12:20 PM, Ivan Shmakov wrote: >> Pavel Ivanov writes: > > [...] > > >> Unfortunately, the string concatenation operator, when applied to > >> two BLOB's, results in a text string instead of a BLOB, like: > > >> SELECT quote (X'5445' || X'5354'); => 'TEST' > > > Maybe the following? > > > SELECT quote(cast(X'5445' || X'5354' as blob)); > > Indeed, it seems to work. Thanks! > > -- > FSF associate member #7257 > > ___ > 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] BLOB concatenation?
> Pavel Ivanov writes: [...] >> Unfortunately, the string concatenation operator, when applied to >> two BLOB's, results in a text string instead of a BLOB, like: >> SELECT quote (X'5445' || X'5354'); => 'TEST' > Maybe the following? > SELECT quote(cast(X'5445' || X'5354' as blob)); Indeed, it seems to work. Thanks! -- FSF associate member #7257 ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] BLOB concatenation?
> Unfortunately, the string concatenation operator, when applied > to two BLOB's, results in a text string instead of a BLOB, like: > > SELECT quote (X'5445' || X'5354'); > => 'TEST' Maybe the following? SELECT quote(cast(X'5445' || X'5354' as blob)); Pavel On Fri, Jan 20, 2012 at 4:23 AM, Ivan Shmakov wrote: > With substr (), it's possible to split a BLOB, like: > > SELECT quote (substr (X'1337cafe', 3, 2)); > => X'CAFE' > > However, how do I concatenate two blobs? > > Unfortunately, the string concatenation operator, when applied > to two BLOB's, results in a text string instead of a BLOB, like: > > SELECT quote (X'5445' || X'5354'); > => 'TEST' > > -- > FSF associate member #7257 > > ___ > 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
[sqlite] BLOB concatenation?
With substr (), it's possible to split a BLOB, like: SELECT quote (substr (X'1337cafe', 3, 2)); => X'CAFE' However, how do I concatenate two blobs? Unfortunately, the string concatenation operator, when applied to two BLOB's, results in a text string instead of a BLOB, like: SELECT quote (X'5445' || X'5354'); => 'TEST' -- FSF associate member #7257 ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
