doc: Fix syntax in ALTER FOREIGN DATA WRAPPER example

The example for dropping an option was incorrectly quoting the
option key thus making it a value turning the command into an
unqualified ADD operation. The result of dropping became adding
a new key/value pair instead:

 d=# alter foreign data wrapper f options (drop 'b');
 ALTER FOREIGN DATA WRAPPER
 d=# select fdwoptions from pg_foreign_data_wrapper where fdwname='f';
  fdwoptions
 ------------
  {drop=b}
 (1 row)

This has been incorrect for a long time so backpatch to all
supported branches.

Author: Tim 
Discussion: https://postgr.es/m/170292280173.1876505.5204623074024041738@wrigleys.postgresql.org

diff --git a/doc/src/sgml/ref/alter_foreign_data_wrapper.sgml b/doc/src/sgml/ref/alter_foreign_data_wrapper.sgml
index 54f34c2c015168a144f3d1826ab19c59733f2683..dc0957d965a623c558405da8c197c9baa9a07072 100644 (file)
--- a/doc/src/sgml/ref/alter_foreign_data_wrapper.sgml
+++ b/doc/src/sgml/ref/alter_foreign_data_wrapper.sgml
@@ -153,7 +153,7 @@ ALTER FOREIGN DATA WRAPPER name REN
    Change a foreign-data wrapper dbi, add
    option foo, drop bar:
 
-ALTER FOREIGN DATA WRAPPER dbi OPTIONS (ADD foo '1', DROP 'bar');
+ALTER FOREIGN DATA WRAPPER dbi OPTIONS (ADD foo '1', DROP bar);