+ name_, table->schema->name, column->name);
+ }
+
+ *columnp = column;
+ *tablep = table;
+}
+
+#if HAVE_OPENSSL
+static const char *
+query_db_string(const struct ovsdb *db, const char *name)
+{
+ if (!name || strncmp(name, "db:", 3)) {
+ return name;
+ } else {
+ const struct ovsdb_column *column;
+ const struct ovsdb_table *table;
+ const struct ovsdb_row *row;
+
+ parse_db_string_column(db, name, &table, &column);
+
+ HMAP_FOR_EACH (row, struct ovsdb_row, hmap_node, &table->rows) {
+ const struct ovsdb_datum *datum;
+ size_t i;
+
+ datum = &row->fields[column->index];
+ for (i = 0; i < datum->n; i++) {
+ if (datum->keys[i].string[0]) {
+ return datum->keys[i].string;
+ }
+ }
+ }
+ return NULL;