Fix TSqlParser.g4 to Support OpenQuery Format for Table Names

sql/tsql/TSqlParser.g4

@@ -5120,6 +5120,7 @@ full_table_name
         | database = id_ '.' schema = id_? '.'
         | schema = id_ '.'
     )? table = id_
+    | openquery
     ;
 
 table_name

sql/tsql/examples/openQuery_tableName.sql

@@ -0,0 +1,29 @@
+
+WITH abcd as(
+    SELECT
+        *
+    FROM OPENQUERY(mysqldg,'
+        select
+      * from abcd
+        ') AS b
+             LEFT JOIN test.dbo.abcde AS p ON
+        b.inco=p.gco
+),
+     plucount as(
+         select
+             j.loc,
+             COUNT(j.plu) as plucount
+         from jhdata as j
+         group by
+             j.loc
+         having
+             COUNT(j.plu)>1
+     )
+select
+    *
+from jhdata as a
+         inner join plucount as p on
+    a.loc=p.loc
+order by
+    a.dept asc,
+    a.loc asc