Amazon Redshift will no longer support the creation of new Python UDFs starting November 1, 2025.
If you would like to use Python UDFs, create the UDFs prior to that date.
Existing Python UDFs will continue to function as normal. For more information, see the
blog post
SVV_EXTERNAL_TABLES
Use SVV_EXTERNAL_TABLES to view details for external tables; for more information, see CREATE EXTERNAL SCHEMA. Use SVV_EXTERNAL_TABLES also for cross-database queries to view metadata on all tables on unconnected databases that users have access to.
SVV_EXTERNAL_TABLES is visible to all users. Superusers can see all rows; regular users can see only their own data. For more information, see Visibility of data in system tables and views.
Table columns
| Column name | Data type | Description |
|---|---|---|
| redshift_database_name | text | The name of the local Amazon Redshift database. |
| schemaname | text | The name of the Amazon Redshift external schema for the external table. |
| tablename | text | The name of the external table. |
| tabletype | text | The type of table. Some values are TABLE, VIEW, MATERIALIZED VIEW, or " " empty string that represents no information. |
| location | text | The location of the table. |
| input_format | text | The input format |
| output_format | text | The output format. |
| serialization_lib | text | The serialization library. |
| serde_parameters | text | SerDe parameters. |
| compressed | integer | A value that indicates whether the table is
compressed; 1 indicates compressed,
0 indicates not compressed. |
| parameters | text | Table properties. |
Example
The following example shows details svv_external_tables with a predicate on the external schema used by a federated query.
select schemaname, tablename from svv_external_tables where schemaname = 'apg_tpch'; schemaname | tablename ------------+----------- apg_tpch | customer apg_tpch | lineitem apg_tpch | nation apg_tpch | orders apg_tpch | part apg_tpch | partsupp apg_tpch | region apg_tpch | supplier (8 rows)
