Sie können NICHT auf Spaltenaliase in der SELECT-Klausel innerhalb der WHERE-Klausel verweisen, zumindest nicht in derselben Abfrage. Sie könnten eine Unterabfrage durchführen oder einfach die ursprünglichen Spaltenreferenzen verwenden.
select
bobooks."ID" request,
bobooks."TITLE",
bobooks."AUTHOR",
bogenres."NAME" genre,
bobooks."OWNER",
bostatus."NAME" status,
bolanguages."LANGUAGE" language,
bolanguages2."LANGUAGE" secondary_language
from BO_BOOKS bobooks
inner join
BO_GENRES bogenres on bobooks.genre = bogenres.id
inner join
BO_STATUS bostatus on bobooks.status = bostatus.id
inner join
BO_LANGUAGES bolanguages on bobooks.language = bolanguages.id
left outer join
BO_LANGUAGES bolanguages2 on bobooks.secondary_language = bolanguages2.id
where
(replace(:P19_AUTHOR, ' ', '') = ''
or
bobooks.author like '%'||:P19_AUTHOR||'%')
AND
(replace(:P19_TITLE, ' ', '') = ''
or
bobooks.title like '%'||:P19_TITLE||'%')
AND
(:P14_LANGUAGE = 'all'
or
bolanguages."LANGUAGE" = :P19_LANGUAGE
or
bolanguages2."LANGUAGE" = :P19_LANGUAGE)
AND
(:P19_GENRE = 'all'
or
bogenres."NAME" = :P19_GENRE)
AND
(replace(:P19_OWNER, ' ', '') = ''
or
bobooks.owner like '%'||:P19_OWNER||'%');
