# pg_filesystem

System table `pg_filesystem` provides information about the file system used in OushuDB.



Table 1. `pg_catalog.pg_filesystem`

| column               | type      | references | description                                     |
| :------------------- | :-------- | :--------- | :---------------------------------------------- |
| `fsysname`           | name      |            | name of file system                             |
| `fsysconnfn`         | name      |            | name of function connect file system            |
| `fsysdisconnfn`      | name      |            | name of function disconnect file system         |
| `fsysopenfn`         | name      |            | name of function open file system               |
| `fsysclosefn`        | name      |            | name of function close file system              |
| `fsysseekfn`         | name      |            | name of function seek in file system            |
| `fsystellfn`         | name      |            | name of function tell in file system            |
| `fsysreadfn`         | name      |            | name of function read file from file system     |
| `fsyswritefn`        | name      |            | name of function write file into file system    |
| `fsysflushfn`        | name      |            | name of function flush file into file system    |
| `fsysdeletefn`       | name      |            | name of function delete file in file system     |
| `fsyschmodfn`        | name      |            | name of function chomd in file system           |
| `fsysmkdirfn`        | name      |            | name of function make dir in file system        |
| `fsystruncatefn`     | name      |            | name of function truncate a file in file system |
| `fsysgetpathinfofn`  | name      |            | name of function get path info from file system |
| `fsysfreefileinfofn` | name      |            | name of function free path info in file system  |
| `fsyslibfile`        | text      |            | bin file to support the file system             |
| `fsysowner`          | oid       |            | owner of the file system                        |
| `fsystrusted`        | boolean   |            | whether the file system is trusted              |
| `fsysacl`            | aclitem[] |            | acl control for file system                     |