Turn SQLite foreign keys on for every pooled connection by bhagyasakalanka · Pull Request #5802 · thunder-id/thunderid

bhagyasakalanka · 2026-10-14T07:09:54Z

Purpose

TestApplicationImportExportSuite fails now and then on the SQLite job (#5790's run 38520657205, and the same on #5660 on 2026-10-07): re-importing an application right after DELETE /applications/{id} answered 204 fails with UNIQUE constraint failed: OAUTH_INBOUND_PROFILE.ENTITY_ID, OAUTH_INBOUND_PROFILE.DEPLOYMENT_ID. The application row was gone, so the import took the create path, but the OAuth profile row had survived the delete.

The profile is removed by ON DELETE CASCADE from INBOUND_CLIENT, and SQLite enforces foreign keys only on a connection that has turned them on. The provider turned them on with one db.Exec("PRAGMA foreign_keys = ON") after opening, which reaches only the pooled connection that happened to run it. Every other connection the pool opens, or opens again once a connection's ConnMaxLifetime ends, had them off, so a delete on one of those left the child rows behind. Reproduced with a three-connection pool: connection 0 reports foreign_keys=1, connections 1 and 2 report 0.

Approach

The pragma moves into the DSN as _pragma=foreign_keys(1), which modernc.org/sqlite applies to every connection it opens. sqliteDSN joins the path, the configured options and the pragma, handling a path that already carries a query (file::memory:?cache=shared, as the unit tests use) and options that already set it. The one-off Exec after Ping is removed.
No behaviour changes for PostgreSQL.

Related Issues

N/A

Related PRs

Skip a change for one apply without keeping it as the gateway's choice #5790 and Refer to a list from a control plane export and expand it on import #5660 hit the failure in CI.

Checklist

Followed the contribution guidelines.
Manual test round performed and verified.
Documentation provided. (Add links if there are any)
- Ran Vale and fixed all errors and warnings
Tests provided. (Add links if there are any)
- Unit Tests: sqliteDSN for each shape of path and options; the built DSN; and a pool of three pinned connections, each of which reports foreign keys on and cascades a delete. With the previous approach the last test fails on the second and third connection.
- Integration Tests: the SQLite integration job is where the failure showed; it covers this.
Breaking changes. (Fill if applicable)

🤖 Generated with Claude Code

Summary by CodeRabbit

Bug Fixes
- SQLite databases now reliably enforce foreign-key constraints across pooled connections, rather than relying on a one-time setting that could leave some connections unchecked.
- Existing database connection options and query parameters are preserved when foreign-key enforcement is configured, including when the setting is already present. This helps keep database behavior consistent without disrupting existing connection settings.

coderabbitai · 2026-10-14T07:11:02Z

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📥 Commits

Reviewing files that changed from the base of the PR and between 8cc9ab9 and f5e1773.

📒 Files selected for processing: 2

backend/internal/system/database/provider/dbprovider.go
backend/internal/system/database/provider/sqlite_foreign_keys_test.go

📝 Walkthrough

SQLite DSN construction now combines the database path and configured options, adding a foreign-keys pragma when one is not already present. Tests cover DSN configuration and foreign-key enforcement across three pooled connections.

Changes: SQLite Foreign-Key Configuration

Layer / File(s)	Summary
SQLite DSN construction and configuration `backend/internal/system/database/provider/dbprovider.go`, `backend/internal/system/database/provider/sqlite_foreign_keys_test.go`	`getDBConfig` uses `sqliteDSN` to combine the path and options. The helper adds `_pragma=foreign_keys(1)` unless it is already present in the path or options. Tests cover query joining, memory paths, duplicate avoidance, and SQLite configuration.
Foreign-key enforcement across pooled connections `backend/internal/system/database/provider/dbprovider.go`, `backend/internal/system/database/provider/sqlite_foreign_keys_test.go`	Initialization no longer runs a one-time foreign-key PRAGMA or returns an error if that statement fails. Tests check that three pooled connections enable foreign keys and cascade parent deletion to child rows.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: 🔵 Low · up to 8cc9a

The change reliably enables SQLite foreign keys on every pooled connection. One unusual case remains: a database filename containing the pragma text would skip enforcement. The change is mergeable with a small follow-up.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 75.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		The title is concise, specific, and accurately summarizes the main change: enabling SQLite foreign keys for every pooled connection.
Description check		The description clearly explains the failure, root cause, implementation approach, affected database behavior, related issues, and tests. The Security checks section is omitted, and manual testing, do…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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Inline comments:
Review comments at @backend/internal/system/database/provider/dbprovider.go:
- Line 325: Update sqliteDSN to detect foreign-key pragmas only among parsed DSN
query parameters and their _pragma values; do not search dbPath for the
substring. Preserve the existing behavior that adds _pragma=foreign_keys(1) when
no query parameter enables foreign keys.

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📥 Commits

Reviewing files that changed from the base of the PR and between 4bf9dc5 and 8cc9ab9.

📒 Files selected for processing: 2

backend/internal/system/database/provider/dbprovider.go
backend/internal/system/database/provider/sqlite_foreign_keys_test.go

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Signed-off-by: bhagyasakalanka <bsakalanka9@gmail.com>

codecov · 2026-10-16T05:41:08Z

Codecov Report

❌ Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...nd/internal/system/database/provider/dbprovider.go	94.73%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

KaveeshaPiumini · 2026-10-22T09:27:03Z

+		return false
+	}
+	for _, pragma := range values["_pragma"] {
+		if strings.HasPrefix(strings.TrimSpace(pragma), "foreign_keys") {


Suggested change

if strings.HasPrefix(strings.TrimSpace(pragma), "foreign_keys") {

if strings.HasPrefix(strings.ToLower(strings.TrimSpace(pragma)), "foreign_keys") {

KaveeshaPiumini · 2026-10-22T09:29:14Z

+// child behind. A DSN parameter is applied to every connection the driver opens.
+func sqliteDSN(dbPath, configured string) string {
+	parameters := strings.TrimPrefix(configured, "?")
+	path, pathParameters, _ := strings.Cut(dbPath, "?")


path here shadows the imported path package that getDBConfig uses

bhagyasakalanka requested a review from rajithacharith as a code owner October 14, 2026 07:09

coderabbitai Bot reviewed Oct 14, 2026

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Comment thread backend/internal/system/database/provider/dbprovider.go Outdated

Turn SQLite foreign keys on for every pooled connection

f5e1773

Signed-off-by: bhagyasakalanka <bsakalanka9@gmail.com>

bhagyasakalanka force-pushed the sqlite-foreign-keys branch from 8cc9ab9 to f5e1773 Compare October 14, 2026 14:03

rajithacharith added Type/Bug trigger-pr-builder Add when the PR is ready for CI; starts the PR Builder for this and all later pushes labels Oct 16, 2026

KaveeshaPiumini reviewed Oct 22, 2026

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Turn SQLite foreign keys on for every pooled connection - #5802

Turn SQLite foreign keys on for every pooled connection#5802
bhagyasakalanka wants to merge 1 commit into
thunder-id:mainfrom
bhagyasakalanka:sqlite-foreign-keys

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	if strings.HasPrefix(strings.TrimSpace(pragma), "foreign_keys") {
	if strings.HasPrefix(strings.ToLower(strings.TrimSpace(pragma)), "foreign_keys") {

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