Home/ Questions/Q 7435821
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-29T10:08:22+00:00

I’d like to make sure the SQLite library included with iOS 4.0 supports foreign

  • 0

I’d like to make sure the SQLite library included with iOS 4.0 supports foreign key constraints. The official docs state:

In order to use foreign key constraints in SQLite, the library must be compiled with neither SQLITE_OMIT_FOREIGN_KEY or SQLITE_OMIT_TRIGGER defined.

How can I check it programmatically in C or using sqlite3 CLI tool?

Thanks in advance.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The docs say:

    sqlite> PRAGMA foreign_keys;
0
sqlite> PRAGMA foreign_keys = ON;
sqlite> PRAGMA foreign_keys;
1
sqlite> PRAGMA foreign_keys = OFF;
sqlite> PRAGMA foreign_keys;
0

    Tip: If the command “PRAGMA foreign_keys” returns no data instead of a
    single row containing “0” or “1”, then the version of SQLite you are
    using does not support foreign keys (either because it is older than
    3.6.19 or because it was compiled with SQLITE_OMIT_FOREIGN_KEY or SQLITE_OMIT_TRIGGER defined).

    • 0