db name & language as variables

SQL

USE dewikivoyage_p;
SET @w = 
IF (EXISTS (SELECT 1 FROM page WHERE page_namespace = 4 AND page_is_redirect = 0 AND page_id = 5248757 AND page_title = 'Hauptseite'), 'dewiki',
IF (EXISTS (SELECT 1 FROM page WHERE page_namespace = 0 AND page_is_redirect = 0 AND page_id = 1290 AND page_title = 'Hauptseite'), 'dewikisource',
IF (EXISTS (SELECT 1 FROM page WHERE page_namespace = 0 AND page_is_redirect = 0 AND page_id = 1 AND page_title = 'Hauptseite'), 'dewikivoyage',
IF (EXISTS (SELECT 1 FROM page WHERE page_namespace = 4 AND page_is_redirect = 0 AND page_id = 149455 AND page_title = 'Hauptseite'), 'dewiktionary',
IF (EXISTS (SELECT 1 FROM page WHERE page_namespace = 0 AND page_is_redirect = 0 AND page_id = 15580374 AND page_title = 'Main_Page'), 'enwiki',
IF (EXISTS (SELECT 1 FROM page WHERE page_namespace = 4 AND page_is_redirect = 0 AND page_id = 2271189 AND page_title = 'Portada'), 'eswiki',
IF (EXISTS (SELECT 1 FROM page WHERE page_namespace = 4 AND page_is_redirect = 0 AND page_id = 10635368 AND page_title = 'Accueil_principal'), 'frwiki',
IF (EXISTS (SELECT 1 FROM page WHERE page_namespace = 0 AND page_is_redirect = 0 AND page_id = 722 AND page_title = 'Hoofdpagina'), 'nlwiki', 
'none'))))))));
SELECT meta_p.lang FROM meta_p.wiki WHERE meta_p.dbname = @w;
#SELECT @w;
SQL

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