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diff --git a/doc/src/sgml/html/catalog-pg-database.html b/doc/src/sgml/html/catalog-pg-database.html new file mode 100644 index 0000000..9346423 --- /dev/null +++ b/doc/src/sgml/html/catalog-pg-database.html @@ -0,0 +1,124 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>53.15. pg_database</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="catalog-pg-conversion.html" title="53.14. pg_conversion" /><link rel="next" href="catalog-pg-db-role-setting.html" title="53.16. pg_db_role_setting" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">53.15. <code class="structname">pg_database</code></th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalog-pg-conversion.html" title="53.14. pg_conversion">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 53. System Catalogs</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="catalog-pg-db-role-setting.html" title="53.16. pg_db_role_setting">Next</a></td></tr></table><hr /></div><div class="sect1" id="CATALOG-PG-DATABASE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">53.15. <code class="structname">pg_database</code></h2></div></div></div><a id="id-1.10.4.17.2" class="indexterm"></a><p> + The catalog <code class="structname">pg_database</code> stores information about + the available databases. Databases are created with the <a class="link" href="sql-createdatabase.html" title="CREATE DATABASE"><code class="command">CREATE DATABASE</code></a> command. + Consult <a class="xref" href="managing-databases.html" title="Chapter 23. Managing Databases">Chapter 23</a> for details about the meaning + of some of the parameters. + </p><p> + Unlike most system catalogs, <code class="structname">pg_database</code> + is shared across all databases of a cluster: there is only one + copy of <code class="structname">pg_database</code> per cluster, not + one per database. + </p><div class="table" id="id-1.10.4.17.5"><p class="title"><strong>Table 53.15. <code class="structname">pg_database</code> Columns</strong></p><div class="table-contents"><table class="table" summary="pg_database Columns" border="1"><colgroup><col /></colgroup><thead><tr><th class="catalog_table_entry"><p class="column_definition"> + Column Type + </p> + <p> + Description + </p></th></tr></thead><tbody><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">oid</code> <code class="type">oid</code> + </p> + <p> + Row identifier + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datname</code> <code class="type">name</code> + </p> + <p> + Database name + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datdba</code> <code class="type">oid</code> + (references <a class="link" href="catalog-pg-authid.html" title="53.8. pg_authid"><code class="structname">pg_authid</code></a>.<code class="structfield">oid</code>) + </p> + <p> + Owner of the database, usually the user who created it + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">encoding</code> <code class="type">int4</code> + </p> + <p> + Character encoding for this database + (<a class="link" href="functions-info.html#PG-ENCODING-TO-CHAR"><code class="function">pg_encoding_to_char()</code></a> can translate + this number to the encoding name) + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datlocprovider</code> <code class="type">char</code> + </p> + <p> + Locale provider for this database: <code class="literal">c</code> = libc, + <code class="literal">i</code> = icu + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datistemplate</code> <code class="type">bool</code> + </p> + <p> + If true, then this database can be cloned by + any user with <code class="literal">CREATEDB</code> privileges; + if false, then only superusers or the owner of + the database can clone it. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datallowconn</code> <code class="type">bool</code> + </p> + <p> + If false then no one can connect to this database. This is + used to protect the <code class="literal">template0</code> database from being altered. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datconnlimit</code> <code class="type">int4</code> + </p> + <p> + Sets maximum number of concurrent connections that can be made + to this database. -1 means no limit, -2 indicates the database is + invalid. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datfrozenxid</code> <code class="type">xid</code> + </p> + <p> + All transaction IDs before this one have been replaced with a permanent + (<span class="quote">“<span class="quote">frozen</span>”</span>) transaction ID in this database. This is used to + track whether the database needs to be vacuumed in order to prevent + transaction ID wraparound or to allow <code class="literal">pg_xact</code> to be shrunk. + It is the minimum of the per-table + <a class="link" href="catalog-pg-class.html" title="53.11. pg_class"><code class="structname">pg_class</code></a>.<code class="structfield">relfrozenxid</code> values. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datminmxid</code> <code class="type">xid</code> + </p> + <p> + All multixact IDs before this one have been replaced with a + transaction ID in this database. This is used to + track whether the database needs to be vacuumed in order to prevent + multixact ID wraparound or to allow <code class="literal">pg_multixact</code> to be shrunk. + It is the minimum of the per-table + <a class="link" href="catalog-pg-class.html" title="53.11. pg_class"><code class="structname">pg_class</code></a>.<code class="structfield">relminmxid</code> values. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">dattablespace</code> <code class="type">oid</code> + (references <a class="link" href="catalog-pg-tablespace.html" title="53.56. pg_tablespace"><code class="structname">pg_tablespace</code></a>.<code class="structfield">oid</code>) + </p> + <p> + The default tablespace for the database. + Within this database, all tables for which + <a class="link" href="catalog-pg-class.html" title="53.11. pg_class"><code class="structname">pg_class</code></a>.<code class="structfield">reltablespace</code> is zero + will be stored in this tablespace; in particular, all the non-shared + system catalogs will be there. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datcollate</code> <code class="type">text</code> + </p> + <p> + LC_COLLATE for this database + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datctype</code> <code class="type">text</code> + </p> + <p> + LC_CTYPE for this database + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">daticulocale</code> <code class="type">text</code> + </p> + <p> + ICU locale ID for this database + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datcollversion</code> <code class="type">text</code> + </p> + <p> + Provider-specific version of the collation. This is recorded when the + database is created and then checked when it is used, to detect + changes in the collation definition that could lead to data corruption. + </p></td></tr><tr><td class="catalog_table_entry"><p class="column_definition"> + <code class="structfield">datacl</code> <code class="type">aclitem[]</code> + </p> + <p> + Access privileges; see <a class="xref" href="ddl-priv.html" title="5.7. Privileges">Section 5.7</a> for details + </p></td></tr></tbody></table></div></div><br class="table-break" /></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalog-pg-conversion.html" title="53.14. pg_conversion">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-db-role-setting.html" title="53.16. pg_db_role_setting">Next</a></td></tr><tr><td width="40%" align="left" valign="top">53.14. <code class="structname">pg_conversion</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 53.16. <code class="structname">pg_db_role_setting</code></td></tr></table></div></body></html>
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