工具地址：https://printlove.cn/tools/sql2es/
功能
- [x] sql and expression
- [x] sql or expression
- [x] equal(=) support
- [x] not equal(!=) support
- [x] gt(>) support
- [x] gte(>=) support
- [x] lt(<) support
- [x] lte(<=) support
- [x] sql in (eg. id in (1,2,3) ) expression
- [x] sql not in (eg. id not in (1,2,3) ) expression
- [x] paren bool support (eg. where (a=1 or b=1) and (c=1 or d=1))
- [x] sql like expression (currently use match phrase, perhaps will change to wildcard in the future)
- [x] sql order by support
- [x] sql limit support
- [x] sql not like expression
- [x] field missing check
- [x] support aggregation like count(*), count(field), min(field), max(field), avg(field)
- [x] support aggregation like stats(field), extended_stats(field), percentiles(field) which are not standard sql function
- [ ] null check expression(is null/is not null)
- [ ] join expression
- [ ] having support
截图
