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gh-108364: In sqlite3, disable foreign keys before dumping SQL schema (#113957)

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sqlite3.Connection.iterdump now ensures that foreign key support is
disabled before dumping the database schema, if there is any foreign key
violation.

Co-authored-by: Erlend E. Aasland <erlend@python.org>
This commit is contained in:
Mariusz Felisiak 2024-01-12 10:50:37 +01:00 • committed by GitHub
parent fcb4c8d31a
commit de777e490f
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3 changed files with 18 additions and 3 deletions
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4
Lib/sqlite3/dump.py
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@ -26,6 +26,10 @@ def _iterdump(connection):
writeable_schema = False
cu = connection.cursor()
# Disable foreign key constraints, if there is any foreign key violation.
violations = cu.execute("PRAGMA foreign_key_check").fetchall()
if violations:
yield('PRAGMA foreign_keys=OFF;')
yield('BEGIN TRANSACTION;')
# sqlite_master table contains the SQL CREATE statements for the database.