Amazon Redshift will no longer support the creation of new Python UDFs starting Patch 198. Existing Python UDFs will continue to function until June 30, 2026. For more information, see the [ blog post ](https://amazonaws-china.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/). 

# PG\$1EXTERNAL\$1SCHEMA
<a name="r_PG_EXTERNAL_SCHEMA"></a>

Stores information about external schemas.

PG\$1EXTERNAL\$1SCHEMA is visible to all users. Superusers can see all rows; regular users can see only metadata to which they have access. For more information, see [CREATE EXTERNAL SCHEMA](r_CREATE_EXTERNAL_SCHEMA.md). 

## Table columns
<a name="r_PG_EXTERNAL_SCHEMA-table-columns2"></a>

[\[See the AWS documentation website for more details\]](http://docs.amazonaws.cn/en_us/redshift/latest/dg/r_PG_EXTERNAL_SCHEMA.html)

## Example
<a name="r_PG_EXTERNAL_SCHEMA-example"></a>

The following example shows details for external schemas. 

```
select esoid, nspname as schemaname, nspowner, esdbname as external_db, esoptions 
from pg_namespace a,pg_external_schema b where a.oid=b.esoid;

esoid  | schemaname      | nspowner | external_db | esoptions                                                   
-------+-----------------+----------+-------------+-------------------------------------------------------------
100134 | spectrum_schema |      100 | spectrum_db | {"IAM_ROLE":"arn:aws:iam::123456789012:role/mySpectrumRole"}
100135 | spectrum        |      100 | spectrumdb  | {"IAM_ROLE":"arn:aws:iam::123456789012:role/mySpectrumRole"}
100149 | external        |      100 | external_db | {"IAM_ROLE":"arn:aws:iam::123456789012:role/mySpectrumRole"}
```