Second column is the rowid of the row that contains the invalid Is the name of the table that contains the REFERENCES clause. There are four columns in each result row. Theįoreign_key_check pragma returns one row output for each foreign key "table-name", for foreign key constraints that are violated. The foreign_key_check pragma checks the database, or the table called Or for a single table check: PRAGMA schema.foreign_key_check(table-name) This is the PRAGMA statement foreign_key_check: PRAGMA schema.foreign_key_check Yes, I understand a way to insert without turning off foreign keys support, but it would need knowledge of tables dependencies order that I would like to avoid.Īlthough I don't know of a way that automatically will set to NULL all orphaned values of a column in a table that (should) reference another column in another table, there is a way to get a report of all these cases and then act accordingly. Turns on foreign keys support back.Įverything works fine, but if in some table in old DB there is no foreign key constrain previously, while new DB has one, the data will be inserted as is and link can point nowhere (possibly wrong links is unavoidable and not related to question). Than turns off foreign keys support and fills new DB with data from backup, inserting automatically in loop table by table for all columns with same name. If so it backups user DB, copies internal empty DB to user storage. On start app checks if internal DB (resource) has higher version than user DB. In fact, in first place I'm solving an DB upgrading task. If record with some B.id get deleted, all b_id references will be set to NULL.īut if A already contains record where A.b_id has value that is not in B.id (it was inserted without foreign keys support), is there a way to force SQLite DB check foreign keys and set to NULL such data? For example, let say DB has foreign key A.b_id -> B.id with SET NULL on delete.
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