Function schema_discover_props

src/store/store.c:3047–3070

Discover distinct JSON property keys for a table/column via json_each(). * Prepends base_cols, then appends up to SCHEMA_MAX_JSON_KEYS from the query. * Caller must free the returned array and each string in it. */

 * Prepends base_cols, then appends up to SCHEMA_MAX_JSON_KEYS from the query.
 * Caller must free the returned array and each string in it. */
static void schema_discover_props(sqlite3 *db, const char *sql, const char *project,
                                  const char *filter, const char **base_cols, int base_col_count,
                                  char ***out_props, int *out_count) {
    int pcap = base_col_count + SCHEMA_MAX_JSON_KEYS;
    char **props = malloc(pcap * sizeof(char *));
    int pn = 0;

    for (int b = 0; b < base_col_count; b++) {
        props[pn++] = heap_strdup(base_cols[b]);
    }

    sqlite3_stmt *pstmt = NULL;
    if (sqlite3_prepare_v2(db, sql, CBM_NOT_FOUND, &pstmt, NULL) == SQLITE_OK) {
        bind_text(pstmt, SKIP_ONE, project);
        bind_text(pstmt, PAIR_LEN, filter);
        while (sqlite3_step(pstmt) == SQLITE_ROW && pn < pcap) {
            props[pn++] = heap_strdup((const char *)sqlite3_column_text(pstmt, 0));
        }
        sqlite3_finalize(pstmt);
    }

    *out_props = props;
    *out_count = pn;
}

/* Path scoping for architecture / schema (shared). */
static bool arch_path_is_set(const char *path) {