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Memproses CSV yg di upload menggunakan APEX

Setelah mencari-cari cara untuk memenuhi kebutuhan seperti judul blog ini beberapa waktu,...

Akhirnya pencarian mendapatkan setitik pencerahan dari 2 link berikut:

http://avdeo.com/2008/05/21/uploading-excel-sheet-using-oracle-application-express-apex/
dan
http://application-express-blog.e-dba.com/?p=1728

Dari 2 tips tersebut tampaknya jika langsung memproses binary file XLS (MS Excel) belum berhasil tetapi karena kebutuhan nya sudah bisa dicukupi dgn mengubah format file ke CSV (Coma Separated Value), akhir Saya putuskan untuk mencobanya.

Mengenai bagaimana menggunakan fitur dasar File Upload dgn APEX bisa dipelajari di sini.

Sekarang yg akan dijelaskan adalah post upload process dari APEX tersebut.

Semua file yg diupload dgn APEX akan tersimpan di tabel APEX_APPLICATION_FILES yg merupakan alias/synonym ke tabel WWV_FLOW_FILES.

Struktur Tabel APEX_APPLICATION_FILES:
SQL> desc apex_application_files
Name                                      Null?    Type
----------------------------------------- -------- ----------------------------
ID                                        NOT NULL NUMBER
FLOW_ID                                   NOT NULL NUMBER
NAME                                      NOT NULL VARCHAR2(90)
FILENAME                                           VARCHAR2(400)
TITLE                                              VARCHAR2(255)
MIME_TYPE                                          VARCHAR2(48)
DOC_SIZE                                           NUMBER
DAD_CHARSET                                        VARCHAR2(128)
CREATED_BY                                         VARCHAR2(255)
CREATED_ON                                         DATE
UPDATED_BY                                         VARCHAR2(255)
UPDATED_ON                                         DATE
LAST_UPDATED                                       DATE
CONTENT_TYPE                                       VARCHAR2(128)
BLOB_CONTENT                                       BLOB
LANGUAGE                                           VARCHAR2(30)
DESCRIPTION                                        VARCHAR2(4000)
FILE_TYPE                                          VARCHAR2(255)
FILE_CHARSET                                       VARCHAR2(128)

SQL>
Insight yg didapatkan adalah:

Jika CSV file yang diupload tersebut (tersimpan dalam bentuk BLOB di kolom BLOB_CONTENT) dibaca baris demi baris, kemudian dipindahkan kedalam array (dalam PL/SQL istilahnya Collections) setelah itu dimasukkan kedalam tabel tujuan dengan mengambil nilai Array tersebut tentunya bisa dilakukan bukan? Hanya saja sudah barang tentu harus dalam format yg Common dan terbuka seperti CSV.
Dengan contoh dan pola yg dijelaskan oleh 2 tips diatas,... Here is what I've acomplished,..

Target Table dari Upload CSV adalah MSGP_PURCHASEITEM_ALL dengan struktur sbb:


XLS File yg disesuaikan dengan Target Table seperti berikut ini:



APEX Page yang disiapkan (belum dirapihkan jadi jangan dikomentari mengenai kualitas layout)


Dan hasilnya adalah,....


Untuk bagaimana handling back end dan Behind the Scene Scenario nya,... read my next post.

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