diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index bf9dd33..a0a8601 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -355,6 +355,7 @@ static TypeName *TableFuncTypeName(List *columns);
 %type <node>	def_arg columnElem where_clause where_or_current_clause
 				a_expr b_expr c_expr func_expr AexprConst indirection_el
 				columnref in_expr having_clause func_table array_expr
+				exclusion_where_clause
 %type <list>	func_arg_list
 %type <node>	func_arg_expr
 %type <list>	row type_list array_expr_list
@@ -435,6 +436,7 @@ static TypeName *TableFuncTypeName(List *columns);
 %type <str>		opt_existing_window_name
 %type <ival>	opt_frame_clause frame_extent frame_bound
 
+%type <list>	ExclusionConstraintList ExclusionConstraintElem
 
 /*
  * Non-keyword token types.  These are hard-wired into the "flex" lexer.
@@ -478,7 +480,7 @@ static TypeName *TableFuncTypeName(List *columns);
 	DICTIONARY DISABLE_P DISCARD DISTINCT DO DOCUMENT_P DOMAIN_P DOUBLE_P DROP
 
 	EACH ELSE ENABLE_P ENCODING ENCRYPTED END_P ENUM_P ESCAPE EXCEPT
-	EXCLUDING EXCLUSIVE EXECUTE EXISTS EXPLAIN EXTERNAL EXTRACT
+	EXCLUDING EXCLUSION EXCLUSIVE EXECUTE EXISTS EXPLAIN EXTERNAL EXTRACT
 
 	FALSE_P FAMILY FETCH FIRST_P FLOAT_P FOLLOWING FOR FORCE FOREIGN FORWARD
 	FREEZE FROM FULL FUNCTION FUNCTIONS
@@ -2506,6 +2508,21 @@ ConstraintElem:
 					n->initdeferred		= ($11 & 2) != 0;
 					$$ = (Node *)n;
 				}
+			| EXCLUSION access_method_clause '(' ExclusionConstraintList ')'
+				opt_definition OptConsTableSpace exclusion_where_clause
+				ConstraintAttributeSpec
+				{
+					Constraint *n = makeNode(Constraint);
+					n->contype			  = CONSTR_OPERATOR_EXCLUSION;
+					n->using_method		  = $2;
+					n->operator_exclusion = $4;
+					n->options			  = $6;
+					n->indexspace		  = $7;
+					n->where_clause		  = $8;
+					n->deferrable		  = ($9 & 1) != 0;
+					n->initdeferred		  = ($9 & 2) != 0;
+					$$ = (Node *)n;
+				}
 		;
 
 opt_column_list:
@@ -2546,6 +2563,23 @@ key_match:  MATCH FULL
 			}
 		;
 
+ExclusionConstraintList:
+			ExclusionConstraintElem					{ $$ = list_make1($1); }
+			| ExclusionConstraintList ',' ExclusionConstraintElem
+				{ $$ = lappend($1, $3); }
+		;
+
+ExclusionConstraintElem: index_elem CHECK WITH any_operator
+			{
+				$$ = list_make2($1, $4);
+			}
+		;
+
+exclusion_where_clause:
+			WHERE '(' a_expr ')'					{ $$ = $3; }
+			| /*EMPTY*/								{ $$ = NULL; }
+		;
+
 /*
  * We combine the update and delete actions into one value temporarily
  * for simplicity of parsing, and then break them down again in the
@@ -10772,6 +10806,7 @@ col_name_keyword:
 			| COALESCE
 			| DEC
 			| DECIMAL_P
+			| EXCLUSION
 			| EXISTS
 			| EXTRACT
 			| FLOAT_P
diff --git a/src/include/parser/kwlist.h b/src/include/parser/kwlist.h
index d9181d8..e728d98 100644
--- a/src/include/parser/kwlist.h
+++ b/src/include/parser/kwlist.h
@@ -144,6 +144,7 @@ PG_KEYWORD("enum", ENUM_P, UNRESERVED_KEYWORD)
 PG_KEYWORD("escape", ESCAPE, UNRESERVED_KEYWORD)
 PG_KEYWORD("except", EXCEPT, RESERVED_KEYWORD)
 PG_KEYWORD("excluding", EXCLUDING, UNRESERVED_KEYWORD)
+PG_KEYWORD("exclusion", EXCLUSION, COL_NAME_KEYWORD)
 PG_KEYWORD("exclusive", EXCLUSIVE, UNRESERVED_KEYWORD)
 PG_KEYWORD("execute", EXECUTE, UNRESERVED_KEYWORD)
 PG_KEYWORD("exists", EXISTS, COL_NAME_KEYWORD)