feat: update the builtin funcs of flinksql (#102)

* style: put evrry branch on a single line

* feat: support ASYMMETRIC and SYMMETRIC for between and

* feat: support SIMILAR TO predicate

* feat: support nested boolean expression

* feat: support escape to like and similar in flink sql

* test: add where clause test cases

* feat: add reservedKeywordsUsedAsFunctionName rule

* feat: add timepointLiteral rule and improve function call grammar

test/parser/flinksql/syntax/fixtures/selectWhere.sql

@@ -0,0 +1,27 @@
+SELECT id, age FROM table1 WHERE age IS NOT NULL;
+
+SELECT id, age FROM table1 WHERE age IS NOT DISTINCT FROM 12;
+
+SELECT id, age FROM table1 WHERE age BETWEEN SYMMETRIC 25 AND 18;
+
+SELECT id, age FROM table1 WHERE age NOT LIKE "%aa_d%" ESCAPE "a";
+
+SELECT addr FROM table1 WHERE addr NOT SIMILAR TO '%(123|yz)%' ESCAPE "y";
+
+SELECT id, age FROM table1 WHERE age NOT IN (18,19,20);
+
+SELECT id FROM table1 WHERE id NOT IN ( SELECT * FROM table2 );
+
+SELECT S,SNAME
+FROM S
+WHERE NOT EXISTS
+    (SELECT *
+    FROM C
+   	WHERE NOT EXISTS
+        (SELECT *
+        FROM SC
+        WHERE SC.S=S.S AND SC.C=C.C));
+
+SELECT id, age FROM table1 WHERE age > 18 OR id = 1;
+
+SELECT id, age FROM table1 WHERE age > 18 AND id > 10;