Since there is no BOOLEAN dataype in SQLite, and BOOLEAN is assigned NUMERIC affinity, the sqlite3_column_type() function must be returning SQLITE_INTEGER (because storing 0 and 1 as integers is preferred over floats).
So how does the getColumnType() function determine a datatype of BOOLEAN? My guess is that it is parsing the column name returned by SQLite - which is in itself relying on undetermined behaviour - and assigning an alias will cause that to fail. Maybe the above function will "correctly" detect my_check_name_BOOLEAN? -----Ursprüngliche Nachricht----- Von: sqlite-users [mailto:sqlite-users-boun...@mailinglists.sqlite.org] Im Auftrag von Pavan Paolo Gesendet: Donnerstag, 15. März 2018 17:43 An: sqlite-users@mailinglists.sqlite.org Betreff: [EXTERNAL] [sqlite] Boolean casting Dear all, I use in a view the following snip of code to force the results to be considered as Boolean: SELECT cast(start_processing_date is not null as BOOLEAN), ... I need this solution since in this way I can detect in java the Boolean data type by querying the ResultSet metadata rs.getMetaData().getColumnType() and trigger a proper visualization in a table. Anyway, this cause to get column name a bit messy, reporting the "CAST(non_compliant ..." itself as title of the column. If I try to use an alias such as the following, I fix the title but I loose the Boolean data type. select cast(start_processing_date is not null as BOOLEAN) as my_check_name, ... Is this behavior expected? How I can work on it? Thank you, Paolo _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users ___________________________________________ Gunter Hick | Software Engineer | Scientific Games International GmbH | Klitschgasse 2-4, A-1130 Vienna | FN 157284 a, HG Wien, DVR: 0430013 | (O) +43 1 80100 - 0 May be privileged. May be confidential. Please delete if not the addressee. _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
