Hi,

In documentation, I've found that table_constraint is used in the ALTER
TABLE synopsis but that definition of table_constraint is missing, so I
submitted bug #14873.

I found the table_constraint definition in the CREATE TABLE synopsis and I
just copied/pasted it on the ALTER TABLE synopsis.

The patch should apply to MASTER.I build and tested it successfully on my
computer.

There shouldn't be any platform-specific content.

You will find enclosed my patch. I tried my best to follow instructions on
how to submit a patch.

Regards,

Lætitia
diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml
index 234ccb7..41acda0 100644
*** a/doc/src/sgml/ref/alter_table.sgml
--- b/doc/src/sgml/ref/alter_table.sgml
***************
*** 85,90 **** ALTER TABLE [ IF EXISTS ] <replaceable class="parameter">name</replaceable>
--- 85,101 ----
      OWNER TO { <replaceable class="parameter">new_owner</replaceable> | CURRENT_USER | SESSION_USER }
      REPLICA IDENTITY { DEFAULT | USING INDEX <replaceable class="parameter">index_name</replaceable> | FULL | NOTHING }
  
+ <phrase>and <replaceable class="parameter">table_constraint</replaceable> is:</phrase>
+ 
+ [ CONSTRAINT <replaceable class="parameter">constraint_name</replaceable> ]
+ { CHECK ( <replaceable class="parameter">expression</replaceable> ) [ NO INHERIT ] |
+   UNIQUE ( <replaceable class="parameter">column_name</replaceable> [, ... ] ) <replaceable class="parameter">index_parameters</replaceable> |
+   PRIMARY KEY ( <replaceable class="parameter">column_name</replaceable> [, ... ] ) <replaceable class="parameter">index_parameters</replaceable> |
+   EXCLUDE [ USING <replaceable class="parameter">index_method</replaceable> ] ( <replaceable class="parameter">exclude_element</replaceable> WITH <replaceable class="parameter">operator</replaceable> [, ... ] ) <replaceable class="parameter">index_parameters</replaceable> [ WHERE ( <replaceable class="parameter">predicate</replaceable> ) ] |
+   FOREIGN KEY ( <replaceable class="parameter">column_name</replaceable> [, ... ] ) REFERENCES <replaceable class="parameter">reftable</replaceable> [ ( <replaceable class="parameter">refcolumn</replaceable> [, ... ] ) ]
+     [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ] [ ON DELETE <replaceable class="parameter">action</replaceable> ] [ ON UPDATE <replaceable class="parameter">action</replaceable> ] }
+ [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
+ 
  <phrase>and <replaceable class="parameter">table_constraint_using_index</replaceable> is:</phrase>
  
      [ CONSTRAINT <replaceable class="parameter">constraint_name</replaceable> ]
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