Can I use multiline SQL commands in a query (within a component)?

Question

I would like to modify the following query:
<td>ItranslationString</td>
     <td>
     INSERT INTO TRANSLATIONSTRINGS (daKey, daLanguage, daTranslation, daStringFlag, daSourceFile) VALUES (?, ?, ?, 'N', ?)
     </td>
     <td>daKeyField varchar
     daLanguageField varchar
     daTranslationField varchar
     StringTranslationFilename varchar
     </td>
so that the daSourceFile a) is selected from another record, if it exists b) uses the constant, if not.
In SQL Command the commands (without placeholders) look:
declare c integer;
res varchar(30);
key_var varchar(100);
def_lang_var varchar(5);
begin
key_var := 'newString';
def_lang_var := 'en';
res := 'ap_string.htm';
select count(*) into c FROM TRANSLATIONSTRINGS WHERE daKey = key_var AND daLanguage = def_lang_var;
if c > 0 then
select daSourceFile into res FROM TRANSLATIONSTRINGS WHERE daKey = key_var AND daLanguage = def_lang_var;
end if;
INSERT INTO TRANSLATIONSTRINGS (daKey, daLanguage, daTranslation, daStringFlag, daSourceFile) VALUES (key_var, 'cs', 'translation', 'N', res);
end;
However, such a query does not work in the query resource (multiline commands cannot be used?).
Neither can I think of one line query that would provide the same functionality (tried to test with COALESCE).

Answer 1

Yes, I got the point. The query looks like:
INSERT INTO TRANSLATIONSTRINGS (daKey, daLanguage, daTranslation, daStringFlag, daSourceFile)
SELECT daKey, daLanguage, daTranslation, daStringFlag, daSourceFile FROM (
select 'newString1' daKey, 'en' daLanguage, 'transl' daTranslation, 'N' daStringFlag, daSourceFile FROM TRANSLATIONSTRINGS WHERE daKey = 'newString1' AND daLanguage = 'cs' UNION ALL SELECT 'newString1' daKey, 'en' daLanguage, 'transl' daTranslation, 'N' daStringFlag, 'default' daSourceFile FROM DUAL)
WHERE rownum<=1;
so that's the way how to solve it via SQL.
(Since I can't use DECLARE, I need to bind entry parameters as many times as they appear in the query - not a very nice way, but it works).
The question still is, whether there is a way how to use a multiline query in Component Queries. Even though it is not mentioned specifically in the documentation, it seems it is NOT to be possible by design. So the real question is really WHY - I guess it would be a little bit more convenient to begin/commit transactions, use variables, etc. in a multiline query.
Yet, Sam, thanks!