SQLite仍然无法获取外键

Question

我正在使用sqlite3.exe（sqlite-tools-win32-x86-3270200版本从https://www.sqlite.org/download.html下载于2019年2月28日）。当我.dump测试数据库时，它显示PRAGMA foreign_keys=OFF;

我的代码在做什么错？注意，在打开数据库后，我还放置了PRAGMA foreign_keys = ON;，而.dump仍然显示为关闭。

代码：

PRAGMA foreign_keys = ON;
.open test1.db

CREATE TABLE META_E (E_ID INTEGER PRIMARY KEY NOT NULL, E_Name TEXT, Region TEXT, Date DATE);

CREATE TABLE META_D (D_ID INTEGER PRIMARY KEY NOT NULL, Citation TEXT, is_used BOOLEAN);

CREATE TABLE META_G (Completion TEXT, D_ID INTEGER NOT NULL, Location TEXT, PRIMARY KEY (D_ID), FOREIGN KEY (D_ID) REFERENCES META_D (D_ID));

CREATE TABLE P_ID_Main (Source_File TEXT, P_ID INTEGER NOT NULL, E_ID INTEGER NOT NULL, D_ID INTEGER NOT NULL, PRIMARY KEY (P_ID, E_ID, D_ID), FOREIGN KEY (E_ID) REFERENCES META_E (E_ID), FOREIGN KEY (D_ID) REFERENCES META_D (D_ID));

.dump

转储输出：

sqlite> .dump
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE META_E (E_ID INTEGER PRIMARY KEY NOT NULL, E_Name TEXT, Region TEXT, Date DATE);
CREATE TABLE META_D (D_ID INTEGER PRIMARY KEY NOT NULL, Citation TEXT, is_used BOOLEAN);
CREATE TABLE META_G (Completion TEXT, D_ID INTEGER NOT NULL, Location TEXT, PRIMARY KEY (D_ID), FOREIGN KEY (D_ID) REFERENCES META_D (D_ID));
CREATE TABLE P_ID_Main (Source_File TEXT, P_ID INTEGER NOT NULL, E_ID INTEGER NOT NULL, D_ID INTEGER NOT NULL, PRIMARY KEY (P_ID, E_ID, D_ID), FOREIGN KEY (E_ID) REFERENCES META_E (E_ID), FOREIGN KEY (D_ID) REFERENCES META_D (D_ID));
COMMIT;
sqlite>

感谢您的帮助