Function cbm_store_begin_bulk

src/store/store.c:1210–1222

/* ── Bulk write ─────────────────────────────────────────────────── */

int cbm_store_begin_bulk(cbm_store_t *s) {
    /* Stay in WAL mode throughout. Switching to MEMORY journal mode would
     * make the database unrecoverable if the process crashes mid-write,
     * because the in-memory rollback journal is lost on crash.
     * WAL mode is crash-safe: uncommitted WAL entries are simply discarded
     * on the next open. Performance is preserved via synchronous=OFF and a
     * larger cache, which are safe with WAL. */
    int rc = exec_sql(s, "PRAGMA synchronous = OFF;");
    if (rc != CBM_STORE_OK) {
        return rc;
    }
    return exec_sql(s, "PRAGMA cache_size = -65536;"); /* CBM_SZ_64 MB */
}

int cbm_store_end_bulk(cbm_store_t *s) {
    int rc = exec_sql(s, "PRAGMA synchronous = NORMAL;");