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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

认证培训资料

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

GS_TXN_SNAPSHOT是“时间戳-CSN”映射表，周期性采样，并维护适当的时间范围，用于估算范围内的时间戳对应的CSN值。<figure class="table" style="width:99.9800%;"><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:20.1200%;">名称</td><td style="background-color:rgb(215, 215, 215);border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top:1.0000pt solid windowtext;padding:6.0000pt 9.0000pt;vertical-align:top;width:18.0800%;">类型</td><td style="background-color:rgb(215, 215, 215);border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top:1.0000pt solid windowtext;padding:6.0000pt 9.0000pt;vertical-align:top;width:61.7800%;">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:20.1200%;">snptime</td><td style="border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:18.0800%;">timestamptz</td><td style="border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:61.7800%;">快照捕获时间。</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:20.1200%;">snpxmin</td><td style="border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:18.0800%;">bigint</td><td style="border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:61.7800%;">快照xmin。</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:20.1200%;">snpcsn</td><td style="border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:18.0800%;">bigint</td><td style="border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:61.7800%;">快照csn。</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:20.1200%;">snpsnapshot</td><td style="border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:18.0800%;">TEXT</td><td style="border-bottom:1.0000pt solid windowtext;border-left-style:none;border-right:1.0000pt solid windowtext;border-top-style:none;padding:6.0000pt 9.0000pt;vertical-align:top;width:61.7800%;">快照序列化文本。</td></tr></tbody></table></figure>

GBase 8c

GS_TXN_SNAPSHOT系统表介绍

名称	类型	描述
snptime	timestamptz	快照捕获时间。
snpxmin	bigint	快照xmin。
snpcsn	bigint	快照csn。
snpsnapshot	TEXT	快照序列化文本。

GS_TXN_SNAPSHOT系统表介绍

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