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上车！GBase 8a开发者联盟发车了 技术福利、人脉资源全都有！

认证培训专区

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GBase 8s GDCA 认证培训课前准备

GBase 8a

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物化视图报错：references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them

01-GBase 8s 事务型数据库 安装与卸载

GBase 8s

适配迁移

[GBase 8s 教程]GBase 8s 常用函数、表达式

PG_DESCRIPTION系统表可以给每个数据库对象存储一个可选的描述（注释）。许多内置的系统对象的描述提供了PG_DESCRIPTION的初始内容。这个表的功能类似PG_DESCRIPTION，用于记录GBase 8c范围内共享对象的注释。<figure class="table" style="width:99.9600%;"><table style=";"><tbody><tr><td style="background-color:rgb(215, 215, 215);border:1.0000pt solid windowtext;padding:6.0000pt 9.0000pt;vertical-align:top;width:72.4500pt;">名称</td><td style="background-color:rgb(215, 215, 215);border:1.0000pt solid windowtext;padding:6.0000pt 9.0000pt;vertical-align:top;width:60.7500pt;">类型</td><td style="background-color:rgb(215, 215, 215);border:1.0000pt solid windowtext;padding:6.0000pt 9.0000pt;vertical-align:top;width:94.1000pt;">引用</td><td style="background-color:rgb(215, 215, 215);border:1.0000pt solid windowtext;padding:6.0000pt 9.0000pt;vertical-align:top;width:205.9000pt;">描述</td></tr><tr><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:72.4500pt;">objoid</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:60.7500pt;">oid</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:94.1000pt;">任意OID属性</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:205.9000pt;">这条描述所描述的对象的OID。</td></tr><tr><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:72.4500pt;">classoid</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:60.7500pt;">oid</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:94.1000pt;">href="https://opengauss.org/zh/docs/3.0.0/docs/Developerguide/PG_CLASS.html" PG_CLASS.oid</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:205.9000pt;">这个对象出现的系统表的OID。</td></tr><tr><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:72.4500pt;">objsubid</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:60.7500pt;">integer</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:94.1000pt;">-</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:205.9000pt;">对于一个表字段的注释，它是字段号（objoid和classoid指向表自身）。对于其它对象类型，它是零。</td></tr><tr><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:72.4500pt;">description</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:60.7500pt;">text</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:94.1000pt;">-</td><td style="border-bottom:1.0000pt solid windowtext;border-left:1.0000pt solid windowtext;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:205.9000pt;">对该对象描述的任意文本。</td></tr></tbody></table></figure>

GBase 8c

PG_DESCRIPTION系统表介绍

名称	类型	引用	描述
objoid	oid	任意OID属性	这条描述所描述的对象的OID。
classoid	oid	href="https://opengauss.org/zh/docs/3.0.0/docs/Developerguide/PG_CLASS.html" PG_CLASS.oid	这个对象出现的系统表的OID。
objsubid	integer	-	对于一个表字段的注释，它是字段号（objoid和classoid指向表自身）。对于其它对象类型，它是零。
description	text	-	对该对象描述的任意文本。

PG_DESCRIPTION系统表介绍

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