Fulltext 21.3 lucene

[mdianjun]

该PR基于这个代码开发：ClickHouse#19970 (comment) ，它使用的是rust库，而该PR使用的是C++的lucene库。

测试：

//建表：
create table fulltext
(
    `primary_id` UInt64,
    `secondary_id` UInt64,
    `title` String,
    `content` String
)
ENGINE = Lucene();

//插入：
insert into fulltext values(1,10,'nice', 'java'), (2,20,'good', 'cxx'), (3,30,'nice good', 'python');
insert into fulltext values(4,40,'nice good', 'java cxx');
insert into fulltext values(5,50,'good morning', 'good night');
insert into fulltext values(6,60,'abc def ghi', 'abc def ghi jkl');

//基本查询：
select * from fulltext where lucene('title:good +content:python');
select * from fulltext where lucene('title:good content:python');
select * from fulltext where lucene('title:good -content:python');
//表达式分组：
select * from fulltext where lucene('(title:good OR title:nice) AND content:python');
//字段分组：
select * from fulltext where lucene('title:(good nice)');
//短语查询：两个短语之间是OR关系
select * from fulltext where lucene('title:"nice good" content:"java cxx"'); 
//不指定字段名：查所有字段
select * from fulltext where lucene('good'); 
//通配符查询：“?”通配符一个字符，“*”通配多个字符。
select * from fulltext where lucene('py*n'); 
//相似度查询：后边数字表示相似度，默认是5。
select * from fulltext where lucene('pytz~0.2'); 
//距离查询：abc和jkl之间距离2个单词以内。
select * from fulltext where lucene('content:"abc jkl"~2'); 
//范围查询
select * from fulltext where lucene('primary_id:[2 TO 3]'); 
select * from fulltext where lucene('title:{h TO o}');
//权重查询（或叫优先级查询）
select * from fulltext where lucene('title:good^3 OR title:nice');

[Dileep-Dora]

Any updates on getting the full-text search in Clickhouse?

[HeenaBansal2009]

@mdianjun , I am looking forward for this feature. Any updates on getting it merge in clickhouse?