fixes #309

Author: wumpz

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -2733,7 +2733,13 @@ CreateTable CreateTable():
 							fkIndex.setReferencedColumnNames(colNames);
 							indexes.add(fkIndex);
 						}
-                        [LOOKAHEAD(2) (<K_ON> <K_DELETE> (<K_CASCADE> {fkIndex.setOnDeleteReferenceOption("CASCADE");}|<K_NO> <K_ACTION> {fkIndex.setOnDeleteReferenceOption("NO ACTION");}))]
+                        [LOOKAHEAD(2) (<K_ON> <K_DELETE> 
+                                  (<K_CASCADE> {fkIndex.setOnDeleteReferenceOption("CASCADE");}
+                                   |
+                                   <K_NO> <K_ACTION> {fkIndex.setOnDeleteReferenceOption("NO ACTION");}
+                                   |
+                                   <K_SET> <K_NULL> {fkIndex.setOnDeleteReferenceOption("SET NULL");}
+                                    ))]
                         [LOOKAHEAD(2) (<K_ON> <K_UPDATE> (<K_CASCADE> {fkIndex.setOnUpdateReferenceOption("CASCADE");}|<K_NO> <K_ACTION> {fkIndex.setOnUpdateReferenceOption("NO ACTION");}))]
 				)
 				|

src/test/java/net/sf/jsqlparser/test/create/CreateTableTest.java

@@ -215,6 +215,10 @@ public void testCreateTableWithTablespaceIssue247() throws JSQLParserException {
     public void testCreateTableWithTablespaceIssue247_1() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("CREATE TABLE TABLE1 (COLUMN1 VARCHAR2 (15), COLUMN2 VARCHAR2 (15), CONSTRAINT P_PK PRIMARY KEY (COLUMN1) USING INDEX TABLESPACE \"T_INDEX\")");
     }
+    
+    public void testOnDeleteSetNull() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("CREATE TABLE inventory (inventory_id INT PRIMARY KEY, product_id INT, CONSTRAINT fk_inv_product_id FOREIGN KEY (product_id) REFERENCES products(product_id) ON DELETE SET NULL)");
+    }
 
 	public void testRUBiSCreateList() throws Exception {
 		BufferedReader in = new BufferedReader(new InputStreamReader(CreateTableTest.class.getResourceAsStream("/RUBiS-create-requests.txt")));