const char *string_index;
zebraExplain_lookup_ord(zh->reg->zei, ord, &index_type,
0/* db */, &string_index);
assert(index_type);
const char *string_index;
zebraExplain_lookup_ord(zh->reg->zei, ord, &index_type,
0/* db */, &string_index);
assert(index_type);