> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/12/internals/system-catalogs/51.54.-pg_tablespace.md).

# 51.54. pg\_tablespace

系統目錄 pg\_tablespace 儲存有關可用資料表空間的訊息。可以將資料表放置在特定的資料表空間中以幫助管理磁碟規畫。

與大多數系統目錄不同，pg\_tablespace 在叢集的所有資料庫之間共享：每個叢集只有一個 pg\_tablespace 副本，而不是每個資料庫一個副本。

**Table 51.54. `pg_tablespace` 欄位**

| 名稱           | 型別          | 參考                                                            | 說明                                                                                                       |
| ------------ | ----------- | ------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------- |
| `oid`        | `oid`       |                                                               | 資料列識別指標（隱藏屬性；必須明確選擇）                                                                                     |
| `spcname`    | `name`      |                                                               | 資料表空間名稱                                                                                                  |
| `spcowner`   | `oid`       | [`pg_authid`](/12/internals/system-catalogs/pg_authid.md).oid | 資料表空間的所有者，通常是建立它的使用者                                                                                     |
| `spcacl`     | `aclitem[]` |                                                               | 存取權限；詳情請參閱 [GRANT](/12/reference/sql-commands/grant.md) 和 [REVOKE](/12/reference/sql-commands/revoke.md) |
| `spcoptions` | `text[]`    |                                                               | 資料表空間的選項，為“keyword = value”字串                                                                            |


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