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Lu, Huayi e6fa411af0 DWS DEV 830.201 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2024-05-16 07:24:04 +00:00

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<a name="EN-US_TOPIC_0000001188163762"></a><a name="EN-US_TOPIC_0000001188163762"></a>
<h1 class="topictitle1">PG_FOREIGN_DATA_WRAPPER</h1>
<div id="body8662426"><p id="EN-US_TOPIC_0000001188163762__a9962b27e2fc84a48b38d32c00a127a90"><strong id="EN-US_TOPIC_0000001188163762__b8229111518612">PG_FOREIGN_DATA_WRAPPER</strong> records foreign-data wrapper definitions. A foreign-data wrapper is the mechanism by which external data, residing on foreign servers, is accessed. </p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001188163762__tb965cc87b0dc44399f721d49e210493f" frame="border" border="1" rules="all"><caption><b>Table 1 </b>PG_FOREIGN_DATA_WRAPPER columns</caption><thead align="left"><tr id="EN-US_TOPIC_0000001188163762__re08f91151a354ce4acff685202bf70ca"><th align="left" class="cellrowborder" valign="top" width="16.54%" id="mcps1.3.2.2.5.1.1"><p id="EN-US_TOPIC_0000001188163762__ad127f1a13a0d42b59fc0e38c907d8678">Name</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="12.22%" id="mcps1.3.2.2.5.1.2"><p id="EN-US_TOPIC_0000001188163762__acc9dbda81a5a4887ad1428a23609b071">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="23.119999999999997%" id="mcps1.3.2.2.5.1.3"><p id="EN-US_TOPIC_0000001188163762__aced9118e7b79488f88e19ca859cafd24">Reference</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="48.120000000000005%" id="mcps1.3.2.2.5.1.4"><p id="EN-US_TOPIC_0000001188163762__a56a0943123d34f6893ecec6445f97698">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001188163762__rce4a6c797bd94257a6b74668256cc71f"><td class="cellrowborder" valign="top" width="16.54%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001188163762__a85c6b29f9b504df48ba07e652d3ef766">oid</p>
</td>
<td class="cellrowborder" valign="top" width="12.22%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001188163762__a119631c136564cf3a304073606405603">oid</p>
</td>
<td class="cellrowborder" valign="top" width="23.119999999999997%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001188163762__a007ca33e3db9403cbc2b19b231eca1dd">-</p>
</td>
<td class="cellrowborder" valign="top" width="48.120000000000005%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001188163762__a8174755740be4377abdf2ad876e9e9b3">Row identifier (hidden attribute; must be explicitly selected)</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188163762__r798a943eed6142e08bcdc790c35dabe1"><td class="cellrowborder" valign="top" width="16.54%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001188163762__acc4db4ec29df4bea8e214d6076273332">fdwname</p>
</td>
<td class="cellrowborder" valign="top" width="12.22%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001188163762__a8b8ce021476e42aaaf02a6ee0df2a906">name</p>
</td>
<td class="cellrowborder" valign="top" width="23.119999999999997%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001188163762__a8d8cc6c958fb491f8cea72e071edcd13">-</p>
</td>
<td class="cellrowborder" valign="top" width="48.120000000000005%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001188163762__aff3de9f1fa9b4d3082c1dd5e3a499a3c">Name of the foreign-data wrapper</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188163762__rcf6a28f61b6d453ea1c76315c0a01fd9"><td class="cellrowborder" valign="top" width="16.54%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001188163762__ad2478e33cb0141a08449eaa532a563cd">fdwowner</p>
</td>
<td class="cellrowborder" valign="top" width="12.22%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001188163762__a11d570915d9c4ae9b52d3a5d6b6c6798">oid</p>
</td>
<td class="cellrowborder" valign="top" width="23.119999999999997%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001188163762__a07d744b1d2564de2830151f8b557c65e"><a href="dws_04_0574.html">PG_AUTHID</a>.oid</p>
</td>
<td class="cellrowborder" valign="top" width="48.120000000000005%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001188163762__a9b82132ddc6948b9bbabb6f5385279f7">Owner of the foreign-data wrapper</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188163762__r857823694db04b2e9ed70d4cffec7e78"><td class="cellrowborder" valign="top" width="16.54%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001188163762__a5255a786d82346fcb9c199181ef9ef21">fdwhandler</p>
</td>
<td class="cellrowborder" valign="top" width="12.22%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001188163762__a2579007f8249462a85cf8cac59a1ac30">oid</p>
</td>
<td class="cellrowborder" valign="top" width="23.119999999999997%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001188163762__addedebce74034bfeb362aa0bb161b902"><a href="dws_04_0608.html">PG_PROC</a>.oid</p>
</td>
<td class="cellrowborder" valign="top" width="48.120000000000005%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001188163762__affa41a7e54ac4e63844dfc16830f8dea">References a handler function that is responsible for supplying execution routines for the foreign-data wrapper. Its value is <strong id="EN-US_TOPIC_0000001188163762__b1776765971918">0</strong> if no handler is provided.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188163762__rab6633e50dc1439e80b475e0e19ca0ff"><td class="cellrowborder" valign="top" width="16.54%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001188163762__a31a10c2cf77b45f18db9e9bd9d2679b7">fdwvalidator</p>
</td>
<td class="cellrowborder" valign="top" width="12.22%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001188163762__a912457afb0de4406b809cf1c2524ca39">oid</p>
</td>
<td class="cellrowborder" valign="top" width="23.119999999999997%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001188163762__aea4393e4060844d5adeb45419d6f40c2"><a href="dws_04_0608.html">PG_PROC</a>.oid</p>
</td>
<td class="cellrowborder" valign="top" width="48.120000000000005%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001188163762__a13ab4107ec4c4b27b4b7b9f924bb0f60">References a validator function that is responsible for checking the validity of the options given to the foreign-data wrapper, as well as options for foreign servers and user mappings using the foreign-data wrapper. Its value is <strong id="EN-US_TOPIC_0000001188163762__b39861838162018">0</strong> if no validator is provided.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188163762__rf5afd6e77bd34769a9d6e554be07edd4"><td class="cellrowborder" valign="top" width="16.54%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001188163762__a5c4ed3548c884d5e80db49c667e90708">fdwacl</p>
</td>
<td class="cellrowborder" valign="top" width="12.22%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001188163762__a095bb588a01841dc93bc5a5a9f3b672d">aclitem[]</p>
</td>
<td class="cellrowborder" valign="top" width="23.119999999999997%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001188163762__a97ba63bc904740df82a293686998665e">-</p>
</td>
<td class="cellrowborder" valign="top" width="48.120000000000005%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001188163762__a4bc961c08a8b40f389299870d6fcb1f1">Access permissions</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188163762__rb84d3db9910a4d5694ecd99154fce99c"><td class="cellrowborder" valign="top" width="16.54%" headers="mcps1.3.2.2.5.1.1 "><p id="EN-US_TOPIC_0000001188163762__a919d467ee93a4e3eb14d81580ba4f123">fdwoptions</p>
</td>
<td class="cellrowborder" valign="top" width="12.22%" headers="mcps1.3.2.2.5.1.2 "><p id="EN-US_TOPIC_0000001188163762__a0f78d6958f0e45579bacae17efefc9cb">text[]</p>
</td>
<td class="cellrowborder" valign="top" width="23.119999999999997%" headers="mcps1.3.2.2.5.1.3 "><p id="EN-US_TOPIC_0000001188163762__a0facf700e8014841b960d7c2abda28a8">-</p>
</td>
<td class="cellrowborder" valign="top" width="48.120000000000005%" headers="mcps1.3.2.2.5.1.4 "><p id="EN-US_TOPIC_0000001188163762__a3e1d44199938474ea205e72bf8d14430">Option used for foreign data wrappers. It is a keyword=value string.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_0561.html">System Catalogs</a></div>
</div>
</div>
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