From a67d66149cd5240ec850b8eb741df7a9ab2d58e0 Mon Sep 17 00:00:00 2001
From: syj <904673462@qq.com>
Date: Fri, 15 Jan 2021 11:08:47 +0800
Subject: [PATCH] Add help information about REFERENCES of column_constraint.

---
 doc/src/sgml/ref/alter_table.sgmlin            | 4 +++-
 doc/src/sgml/ref/create_table.sgmlin           | 4 +++-
 doc/src/sgml/ref/create_table_partition.sgmlin | 4 +++-
 src/test/regress/expected/alter_table_000.out  | 4 +++-
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/doc/src/sgml/ref/alter_table.sgmlin b/doc/src/sgml/ref/alter_table.sgmlin
index 0c8a85dce..d2a8caa91 100755
--- a/doc/src/sgml/ref/alter_table.sgmlin
+++ b/doc/src/sgml/ref/alter_table.sgmlin
@@ -76,7 +76,9 @@ where column_constraint can be:
       CHECK ( expression ) |
       DEFAULT default_expr |
       UNIQUE index_parameters |
-      PRIMARY KEY index_parameters }
+      PRIMARY KEY index_parameters |
+      REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ]
+        [ ON DELETE action ] [ ON UPDATE action ] }
     [ DEFERRABLE | NOT DEFERRABLE | INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
 where compress_mode can be:
 { DELTA | PREFIX | DICTIONARY | NUMSTR | NOCOMPRESS }
diff --git a/doc/src/sgml/ref/create_table.sgmlin b/doc/src/sgml/ref/create_table.sgmlin
index 6de5c8a3e..59de07c7c 100644
--- a/doc/src/sgml/ref/create_table.sgmlin
+++ b/doc/src/sgml/ref/create_table.sgmlin
@@ -31,7 +31,9 @@ where column_constraint can be:
   CHECK ( expression ) |
   DEFAULT default_expr |
   UNIQUE index_parameters |
-  PRIMARY KEY index_parameters }
+  PRIMARY KEY index_parameters |
+  REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ]
+    [ ON DELETE action ] [ ON UPDATE action ] }
 [ DEFERRABLE | NOT DEFERRABLE | INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
 where table_constraint can be:
 [ CONSTRAINT constraint_name ]
diff --git a/doc/src/sgml/ref/create_table_partition.sgmlin b/doc/src/sgml/ref/create_table_partition.sgmlin
index 1a103ee3f..e129a8232 100644
--- a/doc/src/sgml/ref/create_table_partition.sgmlin
+++ b/doc/src/sgml/ref/create_table_partition.sgmlin
@@ -35,7 +35,9 @@ where column_constraint can be:
   CHECK ( expression ) |
   DEFAULT default_expr |
   UNIQUE index_parameters |
-  PRIMARY KEY index_parameters }
+  PRIMARY KEY index_parameters |
+  REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ]
+    [ ON DELETE action ] [ ON UPDATE action ] }
 [ DEFERRABLE | NOT DEFERRABLE | INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
 where table_constraint can be:
 [ CONSTRAINT constraint_name ]
diff --git a/src/test/regress/expected/alter_table_000.out b/src/test/regress/expected/alter_table_000.out
index 45a617a40..963f23a95 100644
--- a/src/test/regress/expected/alter_table_000.out
+++ b/src/test/regress/expected/alter_table_000.out
@@ -72,7 +72,9 @@ where column_constraint can be:
       CHECK ( expression ) |
       DEFAULT default_expr |
       UNIQUE index_parameters |
-      PRIMARY KEY index_parameters }
+      PRIMARY KEY index_parameters |
+      REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ]
+        [ ON DELETE action ] [ ON UPDATE action ] }
     [ DEFERRABLE | NOT DEFERRABLE | INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
 where compress_mode can be:
 { DELTA | PREFIX | DICTIONARY | NUMSTR | NOCOMPRESS }