feat(sqlite): self-heal FTS index corruption on writes - #406
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After an unclean shutdown, torn pages in an FTS5 external-content index (doclist shadows) leave the main table rows readable but their INSERT/UPDATE/DELETE failing with SQLITE_CORRUPT_VTAB (267, 'database disk image is malformed') - some records deletable, others stuck, while PRAGMA integrity_check still reports ok. All ORM write/delete statements now go through execHealing: on a corruption error the FTS5 indexes are rebuilt from their content tables (derived data - always safe to regenerate) and the statement is retried once, so a stuck record deletes without operator intervention.
SteveLauC
approved these changes
Aug 24, 2026
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Summary
After an unclean shutdown (SIGKILL mid-write, crash), torn pages in an FTS5 external-content index (doclist shadow tables) leave the main table rows readable but their INSERT/UPDATE/DELETE failing with
SQLITE_CORRUPT_VTAB(267,database disk image is malformed). Symptom seen in the field: some records delete fine, others are stuck forever, whilePRAGMA integrity_checkstill reports ok - only the FTS shadows are damaged.All SQLite ORM write/delete statements now go through
execHealing:malformed/corruptin the message), rebuild every FTS5 index from its content table (INSERT INTO fts(fts) VALUES('rebuild')) - FTS indexes are derived data, regeneration can never lose rowsRebuilds are serialized with a mutex so concurrent writers cannot double-heal.
Field-verified: the manual equivalent of this heal (
rebuild+ retry) fixed a production DB where a stuck job record had been undeletable through the UI.Test plan
go build,go vet, full `TestSQLiteORM*" suite passes