¡Finalmente esto funciona!, así que aquí está la consulta del comando SQL:
MERGE INTO dev_corpus a
USING (SELECT 1000156 corpusid, 'sss2' corpus_name, 'sahaaaaaar' corpusdesc, null corpusimageids, null rocf1, null rocf2, null rocf3, null rocc1, null rocc2, null rocc3, null corpusactive, null corpusrunfrequency, null corpuslastrun, null corpuslastsync, null rocsettingid, null corpusaffinity, null corpusterms, null corpusdomain FROM dual) incoming
ON (a.corpusid = incoming.corpusid )
WHEN MATCHED THEN
UPDATE SET corpus_name = incoming.corpus_name , corpusdesc = incoming.corpusdesc , corpusimageids = incoming.corpusimageids , rocf1 = incoming.rocf1 , rocf2 = incoming.rocf2 , rocf3 = incoming.rocf3 , rocc1 = incoming.rocc1 , rocc2 = incoming.rocc2 , rocc3 = incoming.rocc3 , corpusactive = incoming.corpusactive , corpusrunfrequency = incoming.corpusrunfrequency , corpuslastrun = incoming.corpuslastrun , corpuslastsync = incoming.corpuslastsync , rocsettingid = incoming.rocsettingid , corpusaffinity = incoming.corpusaffinity , corpusterms = incoming.corpusterms , corpusdomain = incoming.corpusdomain
WHEN NOT MATCHED THEN
INSERT (corpusid, corpus_name, corpusdesc, corpusimageids, rocf1, rocf2, rocf3, rocc1, rocc2, rocc3, corpusactive, corpusrunfrequency, corpuslastrun, corpuslastsync, rocsettingid, corpusaffinity, corpusterms, corpusdomain)
VALUES (incoming.corpusid, incoming.corpus_name, incoming.corpusdesc, incoming.corpusimageids, incoming.rocf1, incoming.rocf2, incoming.rocf3, incoming.rocc1, incoming.rocc2, incoming.rocc3, incoming.corpusactive, incoming.corpusrunfrequency, incoming.corpuslastrun, incoming.corpuslastsync, incoming.rocsettingid, incoming.corpusaffinity, incoming.corpusterms, incoming.corpusdomain)
y aquí está el código java usando pstmt:
preparedStatement = dbConnection.prepareStatement("MERGE INTO dev_corpus a " +
"USING (SELECT ? corpusid, ? corpus_name, ? corpusdesc, ? corpusimageids, ? rocf1, ? rocf2, ? rocf3, ? rocc1, ? rocc2, ? rocc3, ? corpusactive, ? corpusrunfrequency, ? corpuslastrun, ? corpuslastsync, ? rocsettingid, ? corpusaffinity, ? corpusterms, ? corpusdomain FROM dual) incoming " +
"ON (a.corpusid = incoming.corpusid) " +
"WHEN MATCHED THEN " +
"UPDATE SET a.corpus_name = incoming.corpus_name , a.corpusdesc = incoming.corpusdesc , a.corpusimageids = incoming.corpusimageids , a.rocf1 = incoming.rocf1 , a.rocf2 = incoming.rocf2 , a.rocf3 = incoming.rocf3 , a.rocc1 = incoming.rocc1 , a.rocc2 = incoming.rocc2 , a.rocc3 = incoming.rocc3 , a.corpusactive = incoming.corpusactive , a.corpusrunfrequency = incoming.corpusrunfrequency , a.corpuslastrun = incoming.corpuslastrun , a.corpuslastsync = incoming.corpuslastsync , a.rocsettingid = incoming.rocsettingid , a.corpusaffinity = incoming.corpusaffinity , a.corpusterms = incoming.corpusterms , a.corpusdomain = incoming.corpusdomain " +
"WHEN NOT MATCHED THEN " +
"INSERT (corpusid, corpus_name, corpusdesc, corpusimageids, rocf1, rocf2, rocf3, rocc1, rocc2, rocc3, corpusactive, corpusrunfrequency, corpuslastrun, corpuslastsync, rocsettingid, corpusaffinity, corpusterms, corpusdomain) " +
"VALUES (incoming.corpusid, incoming.corpus_name, incoming.corpusdesc, incoming.corpusimageids, incoming.rocf1, incoming.rocf2, incoming.rocf3, incoming.rocc1, incoming.rocc2, incoming.rocc3, incoming.corpusactive, incoming.corpusrunfrequency, incoming.corpuslastrun, incoming.corpuslastsync, incoming.rocsettingid, incoming.corpusaffinity, incoming.corpusterms, incoming.corpusdomain)");
tienes la tabla de creación en la sección de preguntas, ¡espero que ayude a alguien! :)