Question

我正在尝试将数据插入到postgresql中的表中。

这是我的方法：

[FileName,PathName] = uigetfile('*.wav', 'Select track')
s = strcat(PathName, FileName);

%info = id3parse(path); %s was in bracket

info = audioinfo(s); % info.SampleRate; gives sample rate etc

Track_Info = cell(1,8); %create a cell array

    try
        id = '1'; 
        Track_Info(1,1) = cellstr(id); %convert to cell array of strings
    catch
    end
    try
        title = info.Title;
        Track_Info(1,2) = cellstr(title);
    catch
    end
    try
        artist = info.Artist;
        Track_Info(1,3) = cellstr(artist);
    catch
    end
    try
        album = 'Default';
        Track_Info(1,4) = cellstr(album);
    catch
    end
    try
        genre = 'Default';
        Track_Info(1,5) = cellstr(genre);
    catch
    end
    try
        bpm = '100';
        Track_Info(1,6) = cellstr(bpm);
    catch
    end
    try
        duration = '1:00';
        Track_Info(1,7) = cellstr(duration);
    catch
    end
    try
        musickey = 'Am';
        Track_Info(1,8) = cellstr(musickey);
    catch
    end

celldisp(Track_Info); %check contents of Track_Info

Track_Info_Test = {'"1"','"Title"','"Joe"','"Album"','"House"','"120"', '"4.00"', '"Am"'};


conn =   database('harmonicmixing','postgres','jurgen','org.postgresql.Driver','jdbc:postgresql://localhost/harmonicmixing');
if(isempty(conn.message))

 disp('database connected')

else
 disp('cannot connect')

 disp(conn.message);

 return
end


colnames = { '"id"','"title"','"artist"', '"album"', '"genre"', '"bpm"', '"duration"', '"musickey"' };
fastinsert(conn, '"musiccollection"', colnames, Track_Info_Test); 
commit(conn);
close(conn);

Track_Info是实际的单元格数组，它将包含有关特定轨道的信息。

然而，在上面的代码中，我正在使用另一个单元格数组Track_info_test，其中的值是硬编码的，因为现在我无法获取信息。我想要做的只是设法将数据插入表中。我已经尝试了很多东西，如上所示的代码就像它现在看起来一样。

这是我得到的错误

Error using database/fastinsert (line 285)
Java exception occurred:
java.sql.BatchUpdateException: Batch entry 0 INSERT INTO "musiccollection"
("id","title","artist","album","genre","bpm","duration","musickey") VALUES (
'"1"','"Title"','"Joe"','"Album"','"House"','"120"','"4.00"','"Am"') was      aborted.  Call
getNextException to see the cause.
at
           org.postgresql.jdbc2.AbstractJdbc2Statement$BatchResultHandler.handleError(Abstrac tJdbc2Statement.java:2762)
        at
    org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1999)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:421)
at
    org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2929)

Error in add_file_to_DB (line 73)
fastinsert(conn, '"musiccollection"', colnames, Track_Info_Test);

有什么想法吗？我究竟做错了什么？备择方案？我错过了什么？新到matlab所以对我来说显而易见并不明显！

提前致谢

从matlab将数据插入postgresql

0 个答案: