fix: #301 pgsql truncate table suggestion (#302)

test/parser/postgresql/suggestion/fixtures/syntaxSuggestion.sql

@@ -75,3 +75,7 @@ UPDATE tablename SET columnname = a + b, (col1, col2) = (a+3, b+4);
 VACUUM tablename (col1, col2);
 
 SELECT * FROM db.tbs GROUP BY (col1, col2) ORDER BY col3;
+
+TRUNCATE TABLE ;
+
+TRUNCATE TABLE t1;