PostgreSQL:表创建时间

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如何在Postgresql中查找表创建时间.

How can I find the table creation time in Postgresql.

示例

如果创建了文件，我可以找到文件创建时间，就像我想知道表创建时间一样.

If I created a file I can find the file creation time like that I want to know the table creation time.

推荐答案

我浏览了pg_ *表，但在那里找不到任何创建时间.可以找到表文件，但是在Linux上您无法获得文件创建时间.因此，我认为答案是，您只能通过以下步骤在Windows上找到此信息:

I had a look through the pg_* tables, and I couldn't find any creation times in there. It's possible to locate the table files, but then on Linux you can't get file creation time. So I think the answer is that you can only find this information on Windows, using the following steps:

• 使用select datname, datdba from pg_database;
获取数据库ID
• 使用select relname, relfilenode from pg_class;
获取表filenode ID
• 查找表文件并查找其创建时间；我认为该位置应类似于<PostgreSQL folder>/main/base/<database id>/<table filenode id>(不确定Windows上的位置).

• get the database id with select datname, datdba from pg_database;
• get the table filenode id with select relname, relfilenode from pg_class;
• find the table file and look up its creation time; I think the location should be something like <PostgreSQL folder>/main/base/<database id>/<table filenode id> (not sure what it is on Windows).