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/flinksql/suggestion/fixtures/multipleSql.sql

@@ -1,19 +0,0 @@
-CREATE TABLE orders (
-    order_uid  BIGINT,
-    product_id BIGINT,
-    price      DECIMAL(32, 2),
-    order_time TIMESTAMP(3)
-) WITH (
-    'connector' = 'datagen'
-);
-
-CREATE TABLE orders (
-    order_uid  BIGINT,
-    product_id BIGINT,
-    price      DECIMAL(32, 2),
-    order_time TIMESTAMP(3)
-) WITH (
-    'connector' = 'datagen'
-);
-
-use cat1.

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

@@ -0,0 +1,31 @@
+SELECT * FROM  -- unfinished
+
+CREATE TEMPORARY VIEW IF NOT EXISTS v AS SELECT col1 FROM tbl;
+
+CREATE TEMPORARY TABLE client_errors (
+    log_time TIMESTAMP(3),
+    request_line STRING,
+    status_code STRING,
+    size INT
+) WITH (
+    'connector' = 'stream-x'
+);
+
+ALTER VIEW v1 RENAME TO v2;
+
+CREATE TABLE db. ; -- unfinished
+
+LOAD MODULE CORE;
+
+REMOVE JAR '<path_to_filename>.jar'
+
+INSERT INTO  VALUES (100, 99.9 / 10, 'abc', true, now ()); -- unfinished
+
+CREATE DATABASE IF NOT EXISTS dataApi COMMENT 'test create database' WITH ('key1' = 'value1', 'key2.a' = 'value2.a');
+
+DROP DATABASE IF EXISTS Orders RESTRICT;
+
+INSERT INTO country_page_view
+SELECT `user`,
+    cnt
+FROM db. ; -- unfinished