93 lines
1.6 KiB
Prolog
93 lines
1.6 KiB
Prolog
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:- compile(library(maplist)).
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:- use_module(library(myddas)).
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main :-
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init,
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main_,
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close.
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main_ :-
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go,
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fail.
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main_ .
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init :-
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%start_low_level_trace,
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db_open(sqlite3, '/data/user/0/pt.up.yap.yapdroid/files/Yap/chinook.db', _, _),
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writeln('chinook has landed').
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go :-
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stop_low_level_trace,
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db_import('Artist', artist),
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writeln(('Artist -> artist')),
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db_import('Album', album),
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writeln(('Album -> album')),
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db_import('Track', track),
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writeln(('Track -> track')).
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go :-
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db_get_attributes_types(album,Als),
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format('~w -> ~w~n',[album,Als]),
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db_get_attributes_types(track,Ts),
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format('~w -> ~w~n',[track,Ts]),
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db_get_attributes_types(artist,As),
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format('~w -> ~w~n',[artist,As]).
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go :-
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db_number_of_fields(album,Als),
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db_number_of_fields(track,Ts),
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db_number_of_fields(artist,As),
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writeln(As:Als:Ts).
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go :-
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db_describe(album, Desc), writeln(album:Desc).
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go :-
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db_describe(track, Desc), writeln(track:Desc).
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go :-
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db_describe(artist, Desc), writeln(artist:Desc).
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go :-
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db_show_tables(Desc), writeln(tables:Desc).
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go :-
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db_show_tables(table(T)),
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db_describe(T,tableinfo(FieldID,Type,Null,Primary,Default,'')),
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writeln(T:tableinfo(FieldID,Type,Null,Primary,Default,'')).
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go :-
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go_cut0.
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go :-
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%stop_low_level_trace,
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findall(X:Y,artist(X,Y),Ls),
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length(Ls,Total),
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sort(Ls, LLs),
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length(LLs, T),
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writeln(T:Total).
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go :-
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go_cut1.
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go :-
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X=1,
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artist(X,Y),
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writeln(X:Y).
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go_cut0 :-
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% start_low_level_trace,
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artist(X,Y),
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writeln(X:Y),
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!.
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go_cut1 :-
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X=1,
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artist(X,Y),
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writeln(X:Y),
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!.
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close :-
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db_close.
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:- main.
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