Catalog Pg Foreign Data Wrapper

`pg_foreign_data_wrapper`

The catalog pg_foreign_data_wrapper stores foreign-data wrapper definitions. A foreign-data wrapper is the mechanism by which external data, residing on foreign servers, is accessed.

Table pg_foreign_data_wrapper Columns

Column Type Description

Column Type Description
`oid` `oid` Row identifier
`fdwname` `name` Name of the foreign-data wrapper
`fdwowner` `oid` (references pg_authid.`oid`) Owner of the foreign-data wrapper
`fdwhandler` `oid` (references pg_proc.`oid`) References a handler function that is responsible for supplying execution routines for the foreign-data wrapper. Zero if no handler is provided
`fdwvalidator` `oid` (references pg_proc.`oid`) References a validator function that is responsible for checking the validity of the options given to the foreign-data wrapper, as well as options for foreign servers and user mappings using the foreign-data wrapper. Zero if no validator is provided
`fdwacl` `aclitem[]` Access privileges;
`fdwoptions` `text[]` Foreign-data wrapper specific options, as “keyword=value” strings

oid oid

Row identifier

fdwname name

Name of the foreign-data wrapper

fdwowner oid (references pg_authid.oid)

Owner of the foreign-data wrapper

fdwhandler oid (references pg_proc.oid)

References a handler function that is responsible for supplying execution routines for the foreign-data wrapper. Zero if no handler is provided

fdwvalidator oid (references pg_proc.oid)

References a validator function that is responsible for checking the validity of the options given to the foreign-data wrapper, as well as options for foreign servers and user mappings using the foreign-data wrapper. Zero if no validator is provided

fdwacl aclitem[]

Access privileges;

fdwoptions text[]

Foreign-data wrapper specific options, as “keyword=value” strings