37.22. domain\_udt\_usage

|        37.22. `domain_udt_usage`         |                             |                                  |                  |                                |
|:----------------------------------------:|-----------------------------|----------------------------------|------------------|--------------------------------|
|[Prev](infoschema-domain-constraints.html)|[Up](information-schema.html)|Chapter 37. The Information Schema|[Home](index.html)| [Next](infoschema-domains.html)|

---

## 37.22. `domain_udt_usage`

 The view `domain_udt_usage` identifies all domains that are based on data types owned by a currently enabled role. Note that in PostgreSQL, built-in data types behave like user-defined types, so they are included here as well.

**Table 37.20. `domain_udt_usage` Columns**

|                                                 Column Type<br/><br/> Description                                                 |
|-----------------------------------------------------------------------------------------------------------------------------------|
|`udt_catalog` `sql_identifier`<br/><br/> Name of the database that the domain data type is defined in (always the current database)|
|                `udt_schema` `sql_identifier`<br/><br/> Name of the schema that the domain data type is defined in                 |
|                                `udt_name` `sql_identifier`<br/><br/> Name of the domain data type                                 |
|      `domain_catalog` `sql_identifier`<br/><br/> Name of the database that contains the domain (always the current database)      |
|                      `domain_schema` `sql_identifier`<br/><br/> Name of the schema that contains the domain                       |
|                                    `domain_name` `sql_identifier`<br/><br/> Name of the domain                                    |

---

|[Prev](infoschema-domain-constraints.html)|[Up](information-schema.html)| [Next](infoschema-domains.html)|
|:-----------------------------------------|:---------------------------:|-------------------------------:|
|       37.21. `domain_constraints`        |     [Home](index.html)      |        37.23. `domains`        |

 // \<![CDATA[ \<-- For SVG support if ('WebSocket' in window) { (function() { function refreshCSS() { var sheets = [].slice.call(document.getElementsByTagName("link")); var head = document.getElementsByTagName("head")[0]; for (var i = 0; i \< sheets.length; ++i) { var elem = sheets[i]; head.removeChild(elem); var rel = elem.rel; if (elem.href && typeof rel != "string" || rel.length == 0 || rel.toLowerCase() == "stylesheet") { var url = elem.href.replace(/(&|\\?)\_cacheOverride=\\d+/, ''); elem.href = url + (url.indexOf('?') \>= 0 ? '&' : '?') + '\_cacheOverride=' + (new Date().valueOf()); } head.appendChild(elem); } } var protocol = window.location.protocol === 'http:' ? 'ws://' : 'wss://'; var address = protocol + window.location.host + window.location.pathname + '/ws'; var socket = new WebSocket(address); socket.onmessage = function(msg) { if (msg.data == 'reload') window.location.reload(); else if (msg.data == 'refreshcss') refreshCSS(); }; console.log('Live reload enabled.'); })(); } // ]]\>