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feat: add chat and chat_files cleanup to dbpurge (#23833)

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Fixes https://github.com/coder/coder/issues/23910

Adds periodic cleanup of chats and chat files to the dbpurge background
goroutine, with a configurable retention period exposed in the Agent
settings UI.

> 🤖 Written by a Coder Agent. Reviewed by a human.
This commit is contained in:
Cian Johnston
2026-04-08 11:08:09 +01:00
committed by GitHub
parent 3a612898c6
commit 233343c010
26 changed files with 1514 additions and 4 deletions
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coderd/database/querier.go
+26
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@@ -128,6 +128,22 @@ type sqlcQuerier interface {
// connection events (connect, disconnect, open, close) which are handled
// separately by DeleteOldAuditLogConnectionEvents.
DeleteOldAuditLogs(ctx context.Context, arg DeleteOldAuditLogsParams) (int64, error)
// TODO(cian): Add indexes on chats(archived, updated_at) and
// chat_files(created_at) for purge query performance.
// See: https://github.com/coder/internal/issues/1438
// Deletes chat files that are older than the given threshold and are
// not referenced by any chat that is still active or was archived
// within the same threshold window. This covers two cases:
// 1. Orphaned files not linked to any chat.
// 2. Files whose every referencing chat has been archived for longer
// than the retention period.
DeleteOldChatFiles(ctx context.Context, arg DeleteOldChatFilesParams) (int64, error)
// Deletes chats that have been archived for longer than the given
// threshold. Active (non-archived) chats are never deleted.
// Related chat_messages, chat_diff_statuses, and
// chat_queued_messages are removed via ON DELETE CASCADE.
// Parent/root references on child chats are SET NULL.
DeleteOldChats(ctx context.Context, arg DeleteOldChatsParams) (int64, error)
DeleteOldConnectionLogs(ctx context.Context, arg DeleteOldConnectionLogsParams) (int64, error)
// Delete all notification messages which have not been updated for over a week.
DeleteOldNotificationMessages(ctx context.Context) error
@@ -265,6 +281,11 @@ type sqlcQuerier interface {
GetChatProviderByProvider(ctx context.Context, provider string) (ChatProvider, error)
GetChatProviders(ctx context.Context) ([]ChatProvider, error)
GetChatQueuedMessages(ctx context.Context, chatID uuid.UUID) ([]ChatQueuedMessage, error)
// Returns the chat retention period in days. Chats archived longer
// than this and orphaned chat files older than this are purged by
// dbpurge. Returns 30 (days) when no value has been configured.
// A value of 0 disables chat purging entirely.
GetChatRetentionDays(ctx context.Context) (int32, error)
GetChatSystemPrompt(ctx context.Context) (string, error)
// GetChatSystemPromptConfig returns both chat system prompt settings in a
// single read to avoid torn reads between separate site-config lookups.
@@ -865,6 +886,10 @@ type sqlcQuerier interface {
// This must be called from within a transaction. The lock will be automatically
// released when the transaction ends.
TryAcquireLock(ctx context.Context, pgTryAdvisoryXactLock int64) (bool, error)
// Unarchives a chat (and its children). Stale file references are
// handled automatically by FK cascades on chat_file_links: when
// dbpurge deletes a chat_files row, the corresponding
// chat_file_links rows are cascade-deleted by PostgreSQL.
UnarchiveChatByID(ctx context.Context, id uuid.UUID) ([]Chat, error)
// This will always work regardless of the current state of the template version.
UnarchiveTemplateVersion(ctx context.Context, arg UnarchiveTemplateVersionParams) error
@@ -1006,6 +1031,7 @@ type sqlcQuerier interface {
UpsertChatDiffStatus(ctx context.Context, arg UpsertChatDiffStatusParams) (ChatDiffStatus, error)
UpsertChatDiffStatusReference(ctx context.Context, arg UpsertChatDiffStatusReferenceParams) (ChatDiffStatus, error)
UpsertChatIncludeDefaultSystemPrompt(ctx context.Context, includeDefaultSystemPrompt bool) error
UpsertChatRetentionDays(ctx context.Context, retentionDays int32) error
UpsertChatSystemPrompt(ctx context.Context, value string) error
UpsertChatTemplateAllowlist(ctx context.Context, templateAllowlist string) error
UpsertChatUsageLimitConfig(ctx context.Context, arg UpsertChatUsageLimitConfigParams) (ChatUsageLimitConfig, error)