如何在Room中附加数据库？

Question

I tried to attach database in Android Room like this: How to select from multiple databases in Android Room(How to attach databases) but i got error when building project: error: There is a problem with the query: [SQLITE_ERROR] SQL error or missing database (no such table: database.table) Error concerns

@Query("select t.id as tid from mydatabase.mytable t")
public List<MyPojo> getMyTableIds();

When I added @SkipQueryVerification, error changed on: error: Not sure how to convert a Cursor to this method's return type.

Error dissapears when I remove "mydatabase." from Query.

How to attach database in Android Room and make cross databases query?

Answer 1

You can attach your another database in onOpen callback. For details see the answer of another post here .