基于Phoenix对HBase建索引

参考：

Phoenix与HBase集成进行数据分析

HBase查询速度慢原因排查

在DBeaver中执行下列语句：

select * from ASSET_NORMAL WHERE ASSET_ID=‘19-1151444153020846080‘;

返回信息：

3d8f2cf978094a47b2f24dea58fa697c    19-1151444153020846080    电脑    1001005    信息设备    1001005002 ……

如下：

在DBeaver中执行下列语句：

select count(*) from ASSET_NORMAL;

返回信息：

10,614

如下：

在DBeaver中执行下列语句：

explain select count(*) from ASSET_NORMAL;

返回信息：

CLIENT 1-CHUNK PARALLEL 1-WAY FULL SCAN OVER IDX_ASSET_NORMAL
    SERVER FILTER BY FIRST KEY ONLY
    SERVER AGGREGATE INTO SINGLE ROW
CLIENT 200 ROW LIMIT

如下：

在DBeaver中执行下列语句：

explain select * from ASSET_NORMAL WHERE ASSET_ID=‘19-1151444153020846080‘;

返回信息：

CLIENT 1-CHUNK 200 ROWS 177000 BYTES SERIAL 1-WAY ROUND ROBIN RANGE SCAN OVER IDX_ASSET_NORMAL [‘19-1151444153020846080‘]    177000    200    0
    SERVER FILTER BY FIRST KEY ONLY    177000    200    0
    SERVER 200 ROW LIMIT    177000    200    0
CLIENT 200 ROW LIMIT    177000    200    0

如下：

直接通过Bash进行操作，执行下列语句：

select count(*) from ASSET_NORMAL;

耗时0.071s，返回如下信息：

0: jdbc:phoenix:node3:2181:/hbase> select count(*) from ASSET_NORMAL;
+-----------+
| COUNT(1)  |
+-----------+
| 11286     |
+-----------+
1 row selected (0.071 seconds)

执行下列语句：

explain select count(*) from ASSET_NORMAL;

耗时0.03s，返回如下信息：

0: jdbc:phoenix:node3:2181:/hbase> explain select count(*) from ASSET_NORMAL;
+----------------------------------------------------------------+-----------------+----------------+--------------+
|                              PLAN                              | EST_BYTES_READ  | EST_ROWS_READ  | EST_INFO_TS  |
+----------------------------------------------------------------+-----------------+----------------+--------------+
| CLIENT 1-CHUNK PARALLEL 1-WAY FULL SCAN OVER IDX_ASSET_NORMAL  | null            | null           | null         |
|     SERVER FILTER BY FIRST KEY ONLY                            | null            | null           | null         |
|     SERVER AGGREGATE INTO SINGLE ROW                           | null            | null           | null         |
+----------------------------------------------------------------+-----------------+----------------+--------------+
3 rows selected (0.03 seconds)

执行下列语句：

select * from ASSET_NORMAL WHERE ASSET_ID=‘19-1151444153020846080‘;

耗时0.359s，返回如下信息：

0: jdbc:phoenix:node3:2181:/hbase> select * from ASSET_NORMAL WHERE ASSET_ID=‘19-1151444153020846080‘;
+-----------------------------------+-------------------------+-------------+------------------------+--------------------------+----------------+
|                ID                 |        ASSET_ID         | ASSET_NAME  | ASSET_FIRST_DEGREE_ID  | ASSET_FIRST_DEGREE_NAME  | ASSET_SECOND_D |
+-----------------------------------+-------------------------+-------------+------------------------+--------------------------+----------------+
| 3d8f2cf978094a47b2f24dea58fa697c  | 19-1151444153020846080  | 电脑          | 1001005                | 信息设备                     | 1001005002     |
+-----------------------------------+-------------------------+-------------+------------------------+--------------------------+----------------+
1 row selected (0.359 seconds)

执行下列语句：

explain select * from ASSET_NORMAL WHERE ASSET_ID=‘19-1151444153020846080‘;

耗时0.025s，返回如下信息：

0: jdbc:phoenix:node3:2181:/hbase> explain select * from ASSET_NORMAL WHERE ASSET_ID=‘19-1151444153020846080‘;
+--------------------------------------------------------------------------------------------------------+-----------------+----------------+----+
|                                                  PLAN                                                  | EST_BYTES_READ  | EST_ROWS_READ  | ES |
+--------------------------------------------------------------------------------------------------------+-----------------+----------------+----+
| CLIENT 1-CHUNK PARALLEL 1-WAY ROUND ROBIN RANGE SCAN OVER IDX_ASSET_NORMAL [‘19-1151444153020846080‘]  | null            | null           | nu |
|     SERVER FILTER BY FIRST KEY ONLY                                                                    | null            | null           | nu |
+--------------------------------------------------------------------------------------------------------+-----------------+----------------+----+
2 rows selected (0.025 seconds)

如下：

原文地址：https://www.cnblogs.com/ratels/p/11203313.html