fix: restore GENERATED ALWAYS AS IDENTITY parsing (#2397)

Author: dengliming

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

@@ -9790,7 +9790,7 @@ List<String> CreateParameter():
             | tk=<K_TYPE> | tk=<K_COMMENT> | tk=<K_USING> | tk=<K_COLLATE> | tk=<K_ASC>
             | tk=<K_DESC> | tk=<K_TRUE> | tk=<K_FALSE> | tk=<K_PARALLEL> | tk=<K_BINARY> | tk=<K_START> | tk=<K_ORDER>
             | tk=<K_TIME_KEY_EXPR> | tk=<K_RAW> | tk=<K_HASH> | tk=<K_FIRST> | tk=<K_LAST> | tk = <K_SIGNED>  | tk = <K_UNSIGNED>
-            | tk=<K_ENGINE> | tk=<K_IDENTITY> | tk=<K_MATERIALIZED> | tk=<K_SAMPLE>
+            | tk=<K_ENGINE> | tk=<K_IDENTITY> | tk=<K_MATERIALIZED> | tk=<K_SAMPLE> | tk=<K_ALWAYS>
             | tk="="
         )
         { param.add(tk.image); }

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

@@ -926,6 +926,18 @@ public void testCreateTableIssue1230() throws JSQLParserException {
                 "CREATE TABLE TABLE_HISTORY (ID bigint generated by default as identity, CREATED_AT timestamp not null, TEXT varchar (255), primary key (ID))");
     }
 
+    @Test
+    public void testCreateTableGeneratedAlwaysAsIdentityRegression() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed(
+                "create table if not exists book_type ( id bigint not null generated always as identity )");
+    }
+
+    @Test
+    public void testCreateTableGeneratedByDefaultAsIdentityRegression() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed(
+                "create table if not exists book_type ( id bigint not null generated by default as identity )");
+    }
+
     @Test
     public void testCreateUnionIssue1309() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed(