not found primary key metadata info

[hanyisong]

I already read the document ，and search INFORMATION_SCHEMA database.

[Xuanwo]

cc @sundy-li for help

[sundy-li]

We do not support primary key (unique key) like MySQL.

But we support cluster key in fuse engine.

databend > desc system.tables;
+----------------------+-----------------+------+---------+-------+
| Field                | Type            | Null | Default | Extra |
+----------------------+-----------------+------+---------+-------+
| database             | VARCHAR         | NO   |         |       |
| name                 | VARCHAR         | NO   |         |       |
| engine               | VARCHAR         | NO   |         |       |
| cluster_by           | VARCHAR         | NO   |         |       |
| created_on           | VARCHAR         | NO   |         |       |
| dropped_on           | VARCHAR         | NO   |         |       |
| num_rows             | BIGINT UNSIGNED | YES  | NULL    |       |
| data_size            | BIGINT UNSIGNED | YES  | NULL    |       |
| data_compressed_size | BIGINT UNSIGNED | YES  | NULL    |       |
| index_size           | BIGINT UNSIGNED | YES  | NULL    |       |
+----------------------+-----------------+------+---------+-------+
10 rows in set (0.036 sec)