SHOW MATERIALIZED VIEWS¶

Syntax¶

SHOW MATERIALIZED VIEWS [ LIKE '<pattern>' ]
                        [ IN
                             {
                               ACCOUNT                                         |

                               DATABASE                                        |
                               DATABASE <database_name>                        |

                               SCHEMA                                          |
                               SCHEMA <schema_name>                            |
                               <schema_name>

                               APPLICATION <application_name>                  |
                               APPLICATION PACKAGE <application_package_name>  |
                             }
                        ]

Parameters¶

LIKE 'pattern'

Optionally filters the command output by object name. The filter uses case-insensitive pattern matching, with support for SQL wildcard characters (% and _).

For example, the following patterns return the same results:

... LIKE '%testing%' ...

... LIKE '%TESTING%' ...

. Default: No value (no filtering is applied to the output).

[ IN ... ]

Optionally specifies the scope of the command. Specify one of the following:

ACCOUNT

Returns records for the entire account.

DATABASE, . DATABASE db_name

Returns records for the current database in use or for a specified database (db_name).

If you specify DATABASE without db_name and no database is in use, the keyword has no effect on the output.

Note

Using SHOW commands without an IN clause in a database context can result in fewer than expected results.

Objects with the same name are only displayed once if no IN clause is used. For example, if you have table t1 in schema1 and table t1 in schema2, and they are both in scope of the database context you’ve specified (that is, the database you’ve selected is the parent of schema1 and schema2), then SHOW TABLES only displays one of the t1 tables.

SCHEMA, . SCHEMA schema_name

Returns records for the current schema in use or a specified schema (schema_name).

SCHEMA is optional if a database is in use or if you specify the fully qualified schema_name (for example, db.schema).

If no database is in use, specifying SCHEMA has no effect on the output.

APPLICATION application_name, . APPLICATION PACKAGE application_package_name

Returns records for the named Snowflake Native App or application package.

Default: Depends on whether the session currently has a database in use:

• Database: DATABASE is the default (that is, the command returns the objects you have privileges to view in the database).

• No database: ACCOUNT is the default (that is, the command returns the objects you have privileges to view in your account).

Usage notes¶

• The output columns are similar to the output columns for SHOW TABLES, but includes the following additional columns:

  • refreshed_on: time of the last DML operation on the base table that was processed by a “refresh” operation.

  • compacted_on: time of the last DML operation on the base table that was processed by a “compaction” operation.

  • behind_by: If the background process that updates the materialized view with changes from the base table has not yet brought the materialized view up to date, then this column shows approximately how many seconds the materialized view is “behind” the base table. Note that even if this shows that the materialized view is not up to date, any queries on the materialized view will still return up-to-date results (they just might take a little longer as extra information is retrieved from the base table).

• The command SHOW VIEWS also shows information about materialized views.

• The command doesn’t require a running warehouse to execute.

• The command only returns objects for which the current user’s current role has been granted at least one access privilege.

• The MANAGE GRANTS access privilege implicitly allows its holder to see every object in the account. By default, only the account administrator (users with the ACCOUNTADMIN role) and security administrator (users with the SECURITYADMIN role) have the MANAGE GRANTS privilege.

• To post-process the output of this command, you can use the pipe operator or the RESULT_SCAN function. Both constructs treat the output as a result set that you can query.

• The command returns a maximum of ten thousand records for the specified object type, as dictated by the access privileges for the role used to execute the command. Any records above the ten thousand records limit aren’t returned, even with a filter applied.

  To view results for which more than ten thousand records exist, query the corresponding view (if one exists) in the Snowflake Information Schema.

Output¶

The command output provides materialized view properties and metadata in the following columns:

Examples¶

Show all materialized views:

SHOW MATERIALIZED VIEWS;

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Show only materialized views with names matching the specified regular expression:

SHOW MATERIALIZED VIEWS LIKE 'mv1%';

+-------------------------------+------+----------+---------------+-------------+------------+------+-------+----------------------+--------------------+-------------------+-------------------------------+--------------+----------+---------+----------------+-----------+---------+--------------------------------------------+-----------+----------------------+-----------------+
| created_on                    | name | reserved | database_name | schema_name | cluster_by | rows | bytes | source_database_name | source_schema_name | source_table_name | refreshed_on                  | compacted_on | owner    | invalid | invalid_reason | behind_by | comment | text                                       | is_secure | automatic_clustering | owner_role_type |
|-------------------------------+------+----------+---------------+-------------+------------+------+-------+----------------------+--------------------+-------------------+-------------------------------+--------------+----------+---------+----------------+-----------+---------+--------------------------------------------+-----------|----------------------+-----------------|
| 2018-10-05 17:13:17.579 -0700 | MV1  |          | TEST_DB1      | PUBLIC      |            |    0 |     0 | TEST_DB1             | PUBLIC             | INVENTORY         | 2018-10-05 17:13:50.373 -0700 | NULL         | SYSADMIN | false   | NULL           | 0s        |         | CREATE OR REPLACE MATERIALIZED VIEW mv1 AS | false     | OFF                  | ROLE            |
|                               |      |          |               |             |            |      |       |                      |                    |                   |                               |              |          |         |                |           |         |       SELECT ID, price FROM inventory;     |           |                      |                 |          |
+-------------------------------+------+----------+---------------+-------------+------------+------+-------+----------------------+--------------------+-------------------+-------------------------------+--------------+----------+---------+----------------+-----------+---------+--------------------------------------------+-----------+----------------------+-----------------+

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