Support timestamptz dateliteral (#1621)

* support timestamptz as datetime literal

* rename test

Author: tpoll

src/main/java/net/sf/jsqlparser/expression/DateTimeLiteralExpression.java

@@ -53,6 +53,6 @@ public DateTimeLiteralExpression withType(DateTime type) {
     }
 
     public enum DateTime {
-        DATE, TIME, TIMESTAMP;
+        DATE, TIME, TIMESTAMP, TIMESTAMPTZ;
     }
 }

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

@@ -182,7 +182,7 @@ TOKEN: /* SQL Keywords. prefixed with K_ to avoid name clashes */
 |   <K_CYCLE:"CYCLE">
 |   <K_DATABASE:"DATABASE">
 |   <K_DECLARE: "DECLARE">
-|   <K_DATETIMELITERAL : ("DATE" | "TIME" | "TIMESTAMP") >
+|   <K_DATETIMELITERAL : ("DATE" | "TIME" | "TIMESTAMP" | "TIMESTAMPTZ") >
 |   <K_DATE_LITERAL : ( "YEAR" | "MONTH" | "DAY" | "HOUR" | "MINUTE" | "SECOND" ) >
 |   <K_DBA_RECYCLEBIN: "DBA_RECYCLEBIN">
 |   <K_DEFAULT : "DEFAULT">

src/test/java/net/sf/jsqlparser/statement/select/SelectTest.java

@@ -5238,4 +5238,9 @@ public void testNamedWindowDefinitionIssue1581() throws JSQLParserException {
     public void testNamedWindowDefinitionIssue1581_2() throws JSQLParserException {
         assertSqlCanBeParsedAndDeparsed("SELECT sum(salary) OVER w1, avg(salary) OVER w2 FROM empsalary WINDOW w1 AS (PARTITION BY depname ORDER BY salary DESC), w2 AS (PARTITION BY depname2 ORDER BY salary2)");
     }
+
+    @Test
+    public void testTimestamptzDateTimeLiteral() throws JSQLParserException {
+        assertSqlCanBeParsedAndDeparsed("SELECT * FROM table WHERE x >= TIMESTAMPTZ '2021-07-05 00:00:00+00'");
+    }
 }