Support RESTART without value (#1425)

Since Postgre 8.4, RESTART in ALTER SEQUENCE can be set without value.

Author: OlivierCavadenti

src/main/java/net/sf/jsqlparser/schema/Sequence.java

@@ -198,7 +198,11 @@ public String formatParameter() {
                 case START_WITH:
                     return prefix("START WITH");
                 case RESTART_WITH:
-                    return prefix("RESTART WITH");
+                    if(value != null){
+                        return prefix("RESTART WITH");
+                    } else {
+                        return "RESTART";
+                    }
                 case MAXVALUE:
                 case MINVALUE:
                 case CACHE:

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

@@ -6093,10 +6093,12 @@ List<Sequence.Parameter> SequenceParameters():
     }
    )
    |
-   (<K_RESTART> <K_WITH> token=<S_LONG>
+   (<K_RESTART> [<K_WITH> token=<S_LONG>]
     {
       parameter = new Sequence.Parameter(Sequence.ParameterType.RESTART_WITH);
-      parameter.setValue(Long.parseLong(token.image));
+      if(token != null){
+        parameter.setValue(Long.parseLong(token.image));
+      }
       sequenceParameters.add(parameter);
     }
    )

src/test/java/net/sf/jsqlparser/statement/alter/AlterSequenceTest.java

@@ -116,4 +116,8 @@ public void testAlterSequence_restartIssue1405() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("ALTER SEQUENCE my_seq RESTART WITH 1");
     }
 
+    @Test
+    public void testAlterSequence_restartIssue1405WithoutValue() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("ALTER SEQUENCE my_seq RESTART");
+    }
 }