Dev/Database/Shell/File

Template:Css/Sqlite

Get the file [edit]

• launch sqlite3 shell. See Dev/Sqlite/Shell
• Turn on some options

-- enables column headers
.header on
-- enables column view
.mode column
.width 40 80

• Get a list of thumbs and their database

SELECT  f.fil_name
,       t.thm_w
,       tb.dbb_url
FROM    fsdb_fil f 
        JOIN fsdb_thm t ON f.fil_id = t.thm_owner_id 
            JOIN fsdb_dbb tb ON t.thm_bin_db_id = tb.dbb_uid
WHERE   f.fil_name LIKE 'Earth%'
LIMIT 10
;

The following output should be returned

dbb_url                                   fil_name
----------------------------------------  --------------------------------------------------------------------------------
en.wikipedia.org-file-ns.000-db.001.xowa  Earth_from_Apollo_11_after_translunar_injection.jpg
en.wikipedia.org-file-ns.000-db.001.xowa  Earth-moon.jpg
en.wikipedia.org-file-ns.000-db.001.xowa  Earth-moon.jpg
en.wikipedia.org-file-ns.000-db.001.xowa  Earth_Day_Flag.png
en.wikipedia.org-file-ns.000-db.001.xowa  Earth_precession.jpg
en.wikipedia.org-file-ns.000-db.001.xowa  Earth_Day_Flag.png
en.wikipedia.org-file-ns.000-db.001.xowa  Earthenware_architecture_models,_Eastern_Han_Dynasty,_5.JPG
en.wikipedia.org-file-ns.000-db.001.xowa  Earth_coordinates.PNG
en.wikipedia.org-file-ns.000-db.001.xowa  Earth_symbol.svg
en.wikipedia.org-file-ns.000-db.001.xowa  Earth-cutaway-schematic-english.svg

• Output some thumbs to the file-system

ATTACH 'en.wikipedia.org-file-ns.000-db.001.xowa' AS 'bin_db';

SELECT  writefile(Cast(t.thm_size AS varchar(10)) || 'px-' || f.fil_name, tb.bin_data) AS file_data
FROM    fsdb_fil f
        JOIN fsdb_thm t ON f.fil_id = t.thm_owner_id
            JOIN bin_db.fsdb_bin tb ON t.thm_id = tb.bin_owner_id
WHERE   fil_name = 'Earth-moon.jpg';

DETACH 'bin_db';

• See a listing of the files

sqlite> .shell dir /b *px-*
497px-Earth-moon.jpg
644px-Earth-moon.jpg