Important

Helios features are now enabled during weekly update windows and are no longer directly tied to SingleStore engine releases. Refer to the release notes to view the latest features available in your Helios cluster.

SHOW INDEX, SHOW INDEXES, SHOW KEYS

Syntax

SQL

SHOW {INDEX | INDEXES | KEYS}
{FROM | IN} tbl_name
[{FROM | IN} db_name]
[WHERE expr]

Remarks

tbl_name - name of a table in a SingleStore Helios database.
db_name - name of a SingleStore Helios database. If not specified, then the currently open database is used.
expr - SQL WHERE expression.
The Key_name for shard keys on columnstore tables is listed as "__SHARDKEY" in the SHOW INDEX, SHOW INDEXES, or SHOW KEYS output.
The Index_type for shard keys on columnstore tables is listed at "METADATA_ONLY" in the SHOW INDEX, SHOW INDEXES, or SHOW KEYS output.

Output

Column	Description
`Table`	Table name
`Non_unique`	Non-unique
`Key_name`	Key name
`Seq_in_index`	Sequence in the index
`Column_name`	Column name
`Collation`	Collation
`Cardinality`	Cardinality
`Sub_part`	Sub-part
`Packed`	Packed
`Null`	Null
`Index_type`	Index type (see Index)
`Comment`	Comment
`Index_comment`	Comment

Example

SQL

SHOW INDEX IN mytbl;

+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table | Non_unique | Key_name  | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| mytbl |          1 | seq       |            1 | seq         | NULL      |        NULL |     NULL | NULL   | YES  | BTREE      |         |               |
| mytbl |          1 | seq_index |            1 | seq         | NULL      |        NULL |     NULL | NULL   | YES  | BTREE      |         |               |
+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+

SQL

SHOW INDEXES IN mytbl;

+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table | Non_unique | Key_name  | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| mytbl |          1 | seq       |            1 | seq         | NULL      |        NULL |     NULL | NULL   | YES  | BTREE      |         |               |
| mytbl |          1 | seq_index |            1 | seq         | NULL      |        NULL |     NULL | NULL   | YES  | BTREE      |         |               |
+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+

SQL

SHOW KEYS in mytbl;

+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table | Non_unique | Key_name  | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| mytbl |          1 | seq       |            1 | seq         | NULL      |        NULL |     NULL | NULL   | YES  | BTREE      |         |               |
| mytbl |          1 | seq_index |            1 | seq         | NULL      |        NULL |     NULL | NULL   | YES  | BTREE      |         |               |
+-------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+

SQL

SHOW INDEXES in my_columnstore_tbl;

+--------------------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+---------------+----------+---------------+
| Table              | Non_unique | Key_name   | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type    | Comment  | Index_comment |
+--------------------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+---------------+----------+---------------+
| my_columnstore_tbl |          1 | __SHARDKEY |            1 | a           | NULL      |        NULL |     NULL | NULL   | YES  | METADATA_ONLY |          |               |
+--------------------+------------+------------+--------------+-------------+-----------+-------------+----------+--------+------+---------------+----------+---------------+

Last modified: August 7, 2026

SHOW INDEX, SHOW INDEXES, SHOW KEYS

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Syntax

Remarks

Example

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