Thanks a lot!. The solution works :-) Hamish Allan wrote: > On Mon, May 25, 2009 at 1:15 PM, chandan > <chandan.b...@globaledgesoft.com> wrote: > > >> I have used sqlite3_bind_null() API to bind an integer column with >> NULL. When I read the value of that integer column I get the value as 0 >> (zero). Is there any way I can check if the column is set to NULL? >> > > This was something that confused me at first, so perhaps it's not > crystal clear in the documentation: > > http://www.sqlite.org/capi3ref.html#sqlite3_column_blob > > [Annotations mine] "The sqlite3_column_type() routine returns the > datatype code for the initial data type of the result column [NB I > initially read this as "the initial data type of the column" rather > than "the initial data type of the result", assuming that it would > return the column affinity rather than the stored type]. The returned > value is one of SQLITE_INTEGER, SQLITE_FLOAT, SQLITE_TEXT, > SQLITE_BLOB, or SQLITE_NULL. The value returned by > sqlite3_column_type() is only meaningful if no type conversions have > occurred as described below. After a type conversion, the value > returned by sqlite3_column_type() is undefined. Future versions of > SQLite may change the behavior of sqlite3_column_type() following a > type conversion." > > In other words, if you call sqlite3_column_type() before you call > sqlite3_column_int(), you can differentiate the two cases. > > Best wishes, > Hamish > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > >
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