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peterepetere
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SQL/MED catalog manipulation facilities
This doesn't do any remote or external things yet, but it gives modules like plproxy and dblink a standardized and future-proof system for managing their connection information. Martin Pihlak and Peter Eisentraut
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‎doc/src/sgml/catalogs.sgml

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@@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.184 2008/12/18 18:20:33 tgl Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.185 2008/12/19 16:25:16 petere Exp $ -->
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<!--
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Documentation of the system catalogs, directed toward PostgreSQL developers
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-->
@@ -133,6 +133,16 @@
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<entry>enum label and value definitions</entry>
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</row>
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<row>
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<entry><link linkend="catalog-pg-foreign-data-wrapper"><structname>pg_foreign_data_wrapper</structname></link></entry>
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<entry>foreign-data wrapper definitions</entry>
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</row>
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<row>
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<entry><link linkend="catalog-pg-foreign-server"><structname>pg_foreign_server</structname></link></entry>
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<entry>foreign server definitions</entry>
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</row>
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<row>
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<entry><link linkend="catalog-pg-index"><structname>pg_index</structname></link></entry>
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<entry>additional index information</entry>
@@ -247,6 +257,11 @@
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<entry><link linkend="catalog-pg-type"><structname>pg_type</structname></link></entry>
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<entry>data types</entry>
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</row>
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<row>
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<entry><link linkend="catalog-pg-user-mapping"><structname>pg_user_mapping</structname></link></entry>
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<entry>mappings of users to foreign servers</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
@@ -2552,6 +2567,229 @@
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</sect1>
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<sect1 id="catalog-pg-foreign-data-wrapper">
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<title><structname>pg_foreign_data_wrapper</structname></title>
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<indexterm zone="catalog-pg-foreign-data-wrapper">
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<primary>pg_foreign_data_wrapper</primary>
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</indexterm>
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<para>
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The catalog <structname>pg_foreign_data_wrapper</structname> stores
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foreign-data wrapper definitions. A foreign-data wrapper is the
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mechanism by which external data, residing on foreign servers, is
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accessed.
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</para>
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<table>
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<title><structname>pg_foreign_data_wrapper</> Columns</title>
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<tgroup cols=4>
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Type</entry>
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<entry>References</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><structfield>fdwname</structfield></entry>
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<entry><type>name</type></entry>
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<entry></entry>
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<entry>Name of the foreign-data wrapper</entry>
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</row>
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<row>
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<entry><structfield>fdwowner</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-authid"><structname>pg_authid</structname></link>.oid</literal></entry>
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<entry>Owner of the foreign-data wrapper</entry>
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</row>
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<row>
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<entry><structfield>fdwlibrary</structfield></entry>
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<entry><type>text</type></entry>
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<entry></entry>
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<entry>File name of the library implementing this foreign-data wrapper</entry>
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</row>
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<row>
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<entry><structfield>fdwacl</structfield></entry>
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<entry><type>aclitem[]</type></entry>
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<entry></entry>
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<entry>
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Access privileges; see
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<xref linkend="sql-grant" endterm="sql-grant-title"> and
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<xref linkend="sql-revoke" endterm="sql-revoke-title">
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for details
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</entry>
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</row>
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<row>
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<entry><structfield>fdwoptions</structfield></entry>
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<entry><type>text[]</type></entry>
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<entry></entry>
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<entry>
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Foreign-data wrapper specific options, as <quote>keyword=value</> strings
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</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</sect1>
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<sect1 id="catalog-pg-foreign-server">
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<title><structname>pg_foreign_server</structname></title>
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<indexterm zone="catalog-pg-foreign-server">
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<primary>pg_foreign_server</primary>
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</indexterm>
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<para>
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The catalog <structname>pg_foreign_server</structname> stores
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foreign server definitions. A foreign server describes the
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connection to a remote server, managing external data. Foreign
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servers are accessed via foreign-data wrappers.
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</para>
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<table>
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<title><structname>pg_foreign_server</> Columns</title>
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<tgroup cols=4>
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Type</entry>
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<entry>References</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><structfield>srvname</structfield></entry>
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<entry><type>name</type></entry>
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<entry></entry>
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<entry>Name of the foreign server</entry>
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</row>
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<row>
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<entry><structfield>srvowner</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-authid"><structname>pg_authid</structname></link>.oid</literal></entry>
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<entry>Owner of the foreign server</entry>
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</row>
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<row>
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<entry><structfield>srvfdw</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-foreign-data-wrapper"><structname>pg_foreign_data_wrapper</structname></link>.oid</literal></entry>
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<entry>The OID of the foreign-data wrapper of this foreign server</entry>
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</row>
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<row>
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<entry><structfield>srvtype</structfield></entry>
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<entry><type>text</type></entry>
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<entry></entry>
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<entry>Type of the server (optional)</entry>
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</row>
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<row>
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<entry><structfield>srvversion</structfield></entry>
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<entry><type>text</type></entry>
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<entry></entry>
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<entry>Version of the server (optional)</entry>
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</row>
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<row>
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<entry><structfield>srvacl</structfield></entry>
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<entry><type>aclitem[]</type></entry>
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<entry></entry>
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<entry>
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Access privileges; see
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<xref linkend="sql-grant" endterm="sql-grant-title"> and
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<xref linkend="sql-revoke" endterm="sql-revoke-title">
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for details
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</entry>
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</row>
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<row>
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<entry><structfield>srvoptions</structfield></entry>
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<entry><type>text[]</type></entry>
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<entry></entry>
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<entry>
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Foreign server specific options, as <quote>keyword=value</> strings.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</sect1>
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<sect1 id="catalog-pg-user-mapping">
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<title><structname>pg_user_mapping</structname></title>
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<indexterm zone="catalog-pg-user-mapping">
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<primary>pg_user_mapping</primary>
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</indexterm>
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<para>
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The catalog <structname>pg_user_mapping</structname> stores
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the mappings from local user to remote. Access to this catalog is
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restricted from normal users, use the view
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<link linkend="view-pg-user-mappings"><structname>pg_user_mappings</structname></link>
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instead.
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</para>
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<table>
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<title><structname>pg_user_mapping</> Columns</title>
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<tgroup cols=4>
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Type</entry>
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<entry>References</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><structfield>umuser</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-authid"><structname>pg_authid</structname></link>.oid</literal></entry>
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<entry>OID of the local role being mapped, 0 if the user mapping is public</entry>
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</row>
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<row>
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<entry><structfield>umserver</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-foreign-server"><structname>pg_foreign_server</structname></link>.oid</literal></entry>
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<entry>
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The OID of the foreign server that contains this mapping
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</entry>
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</row>
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<row>
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<entry><structfield>umoptions</structfield></entry>
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<entry><type>text[]</type></entry>
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<entry></entry>
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<entry>
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User mapping specific options, as <quote>keyword=value</> strings.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</sect1>
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<sect1 id="catalog-pg-index">
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<title><structname>pg_index</structname></title>
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</sect1>
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<sect1 id="view-pg-user-mappings">
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<title><structname>pg_user_mappings</structname></title>
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<indexterm zone="view-pg-user-mappings">
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<primary>pg_user_mappings</primary>
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</indexterm>
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<para>
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The view <structname>pg_user_mappings</structname> provides access
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to information about user mappings. This is essentially a publicly
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readable view of
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<link linkend="catalog-pg-user-mapping"><structname>pg_user_mapping</structname></link>
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that leaves out the options field if the user has no rights to use
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it.
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</para>
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<table>
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<title><structname>pg_user_mappings</> Columns</title>
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<tgroup cols=3>
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Type</entry>
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<entry>References</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><structfield>umid</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-user-mapping"><structname>pg_user_mapping</structname></link>.oid</literal></entry>
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<entry>OID of the user mapping</entry>
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</row>
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<row>
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<entry><structfield>srvid</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-foreign-server"><structname>pg_foreign_server</structname></link>.oid</literal></entry>
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<entry>
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The OID of the foreign server that contains this mapping
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</entry>
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</row>
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<row>
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<entry><structfield>srvname</structfield></entry>
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<entry><type>text</type></entry>
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<entry></entry>
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<entry>
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Name of the foreign server
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</entry>
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</row>
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<row>
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<entry><structfield>umuser</structfield></entry>
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<entry><type>oid</type></entry>
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<entry><literal><link linkend="catalog-pg-authid"><structname>pg_authid</structname></link>.oid</literal></entry>
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<entry>OID of the local role being mapped, 0 if the user mapping is public</entry>
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</row>
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<row>
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<entry><structfield>usename</structfield></entry>
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<entry><type>name</type></entry>
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<entry></entry>
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<entry>Name of the local user to be mapped</entry>
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</row>
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<row>
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<entry><structfield>umoptions</structfield></entry>
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<entry><type>text[]</type></entry>
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<entry></entry>
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<entry>
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User mapping specific options, as <quote>keyword=value</>
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strings, if the current user is the owner of the foreign
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server, else null.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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</sect1>
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<sect1 id="view-pg-views">
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<title><structname>pg_views</structname></title>
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‎doc/src/sgml/features.sgml

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<!-- $PostgreSQL: pgsql/doc/src/sgml/features.sgml,v 2.29 2008/11/27 12:12:02 petere Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/features.sgml,v 2.30 2008/12/19 16:25:16 petere Exp $ -->
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<appendix id="features">
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<title>SQL Conformance</title>
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</para>
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<para>
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The <productname>PostgreSQL</productname> core covers parts 1, 2,
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The <productname>PostgreSQL</productname> core covers parts 1, 2, 9,
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11, and 14. Part 3 is covered by the ODBC driver, and part 13 is
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covered by the PL/Java plug-in, but exact conformance is currently
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not being verified for these components. There are currently no
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implementations of parts 4, 9, and 10
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implementations of parts 4 and 10
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for <productname>PostgreSQL</productname>.
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</para>
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