feat: optimize suggestion (#231)

* feat: optimize the strategy of finding the right range

* test: apply commentOtherLine util to all suggestion tests

* test: decomment suggestion test cases

* test: add suggestion test cases in multiple statements

* chore: improve comments

* test: update log info in test

test/parser/pgsql/suggestion/fixtures/multipleStatement.sql

@@ -0,0 +1,21 @@
+CREATE TABLE  VALUES -- unfinished
+
+CREATE UNLOGGED TABLE table1 (col1 int) INHERITS (table_parent) WITHOUT OIDS ON COMMIT DROP;
+
+CREATE SCHEMA schemaname AUTHORIZATION username;
+
+ALTER TABLE products ADD FOREIGN KEY (product_group_id) REFERENCES product_groups;
+
+SELECT * FROM db. ; -- unfinished
+
+INSERT INTO weather (date, city, temp_hi, temp_lo) VALUES ('1994-11-29', 'Hayward', 54, 37);
+
+ANALYZE VERBOSE table_name ( column_name, column_name2);
+
+INSERT INTO  weather (date, city, temp_hi, temp_lo) VALUES ('1994-11-29', 'Hayward', 54, 37); -- unfinished
+
+DROP TABLE products CASCADE;
+
+DROP AGGREGATE aggname2(int);
+
+INSERT INTO products (product_no, name, price) SELECT * FROM db. ; -- unfinished