Function where_add_like_hints

src/store/store.c:2476–2495

Prepend LIKE pre-filter conditions for literal segments of a regex pattern. * The idx_nodes_name index satisfies LIKE '%literal%', cutting the rows that * reach the (more expensive) iregexp call to only those containing the literal. * cbm_extract_like_hints bails on alternation, so no false negatives. */

 * reach the (more expensive) iregexp call to only those containing the literal.
 * cbm_extract_like_hints bails on alternation, so no false negatives. */
static void where_add_like_hints(const char *column, const char *pattern, char *where, int where_sz,
                                 int *wlen, int *nparams, search_bind_t *binds, int *bind_idx,
                                 search_like_pool_t *pool) {
    char *hints[ST_LIKE_HINT_MAX];
    int nhints = cbm_extract_like_hints(pattern, hints, ST_LIKE_HINT_MAX);
    char bind_buf[CBM_SZ_64];
    for (int i = 0; i < nhints; i++) {
        char *lp = make_like_hint(hints[i]);
        free(hints[i]);
        if (!lp)
            continue;
        int pool_was_full = (pool->count >= ST_LIKE_POOL_MAX);
        like_pool_add(pool, lp);
        if (pool_was_full)
            continue; /* lp was freed — skip bind */
        snprintf(bind_buf, sizeof(bind_buf), "%s LIKE ?%d", column, *bind_idx + SKIP_ONE);
        *wlen = where_append(where, where_sz, *wlen, nparams, bind_buf);
        where_bind_text(binds, bind_idx, lp);
    }
}

/* Build basic WHERE clauses: project, label, name, file, qn patterns. */
static int search_where_basic(const cbm_search_params_t *params, char *where, int where_sz,