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                            # 47.25\. `pg_foreign_table`

`pg_foreign_table`表包含關于外表的輔助信息。 一個外表首先通過一個`pg_class`記錄表現，就像一個普通表。 它的`pg_foreign_table`記錄包含只和外表相關的信息，沒有任何其他類型的關系。



**Table 47-25\. `pg_foreign_table` 字段**


| 名字 | 類型 | 引用 | 描述 |
| --- | --- | --- | --- |
| `ftrelid` | `oid` | `pg_class`.oid | 這個外表的`pg_class`記錄的OID |
| `ftserver` | `oid` | `pg_foreign_server`.oid | 這個外表的外部服務器的OID |
| `ftoptions` | `text[]` | 外表選項，使用"keyword=value"格式的字符串 |








                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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