chenlinzhong opened a new pull request, #11761:
URL: https://github.com/apache/doris/pull/11761
# Proposed changes
Issue Number: close #xxx
## Problem summary
```
//create one table such as table2
CREATE TABLE `table2` (
`event_day` date NULL,
`siteid` int(11) NULL DEFAULT "10",
`citycode` smallint(6) NULL,
`visitinfo` varchar(1024) NULL DEFAULT "",
`pv` varchar(1024) REPLACE NULL DEFAULT "0"
) ENGINE=OLAP
AGGREGATE KEY(`event_day`, `siteid`, `citycode`, `visitinfo`)
COMMENT 'OLAP'
DISTRIBUTED BY HASH(`siteid`) BUCKETS 10
PROPERTIES (
"replication_allocation" = "tag.location.default: 1",
"in_memory" = "false",
"storage_format" = "V2"
)
//import some data
MySQL [test_db]> select * from table2;
+------------+--------+----------+------------------------------------+------+
| event_day | siteid | citycode | visitinfo | pv
|
+------------+--------+----------+------------------------------------+------+
| 2017-07-03 | 8 | 12 | {"ip":"192.168.0.5","source":"pc"} | 81
|
| 2017-07-03 | 37 | 12 | {"ip":"192.168.0.3","source":"pc"} | 81
|
| 2017-07-03 | 67 | 16 | {"ip":"192.168.0.2","source":"pc"} | 79
|
| 2017-07-03 | 101 | 11 | {"ip":"192.168.0.5","source":"pc"} | 65
|
| 2017-07-03 | 32 | 15 | {"ip":"192.168.0.1","source":"pc"} | 188
|
| 2017-07-03 | 103 | 12 | {"ip":"192.168.0.5","source":"pc"} | 123
|
| 2017-07-03 | 104 | 16 | {"ip":"192.168.0.5","source":"pc"} | 79
|
| 2017-07-03 | 3 | 12 | {"ip":"192.168.0.3","source":"pc"} | 123
|
| 2017-07-03 | 3 | 15 | {"ip":"192.168.0.2","source":"pc"} | 188
|
| 2017-07-03 | 13 | 11 | {"ip":"192.168.0.1","source":"pc"} | 65
|
| 2017-07-03 | 53 | 12 | {"ip":"192.168.0.2","source":"pc"} | 123
|
| 2017-07-03 | 1 | 11 | {"ip":"192.168.0.1","source":"pc"} | 65
|
| 2017-07-03 | 7 | 16 | {"ip":"192.168.0.4","source":"pc"} | 79
|
| 2017-07-03 | 102 | 15 | {"ip":"192.168.0.5","source":"pc"} | 188
|
| 2017-07-03 | 105 | 12 | {"ip":"192.168.0.5","source":"pc"} | 81
|
+------------+--------+----------+------------------------------------+------+
```
### 1. find most visit top 3 ip
not implement this demo in c++, if you are interested in this demo you can
reference python/java implement
```
MySQL [test_db]> CREATE AGGREGATE FUNCTION
rpc_count_visit_info(varchar(1024)) RETURNS varchar(1024) PROPERTIES (
"TYPE"="RPC",
"OBJECT_FILE"="127.0.0.1:9000",
"update_fn"="rpc_count_visit_info_update",
"merge_fn"="rpc_count_visit_info_merge",
"finalize_fn"="rpc_count_visit_info_finalize"
);
MySQL [test_db]> select rpc_count_visit_info(visitinfo) from table2;
+--------------------------------------------+
| rpc_count_visit_info(`visitinfo`) |
+--------------------------------------------+
| 192.168.0.5:6 192.168.0.2:3 192.168.0.1:3 |
+--------------------------------------------+
1 row in set (0.036 sec)
MySQL [test_db]> select citycode, rpc_count_visit_info(visitinfo) from
table2 group by citycode;
+----------+--------------------------------------------+
| citycode | rpc_count_visit_info(`visitinfo`) |
+----------+--------------------------------------------+
| 15 | 192.168.0.2:1 192.168.0.1:1 192.168.0.5:1 |
| 11 | 192.168.0.1:2 192.168.0.5:1 |
| 12 | 192.168.0.5:3 192.168.0.3:2 192.168.0.2:1 |
| 16 | 192.168.0.2:1 192.168.0.4:1 192.168.0.5:1 |
+----------+--------------------------------------------+
4 rows in set (0.050 sec)
```
### 2. sum pv
```
CREATE AGGREGATE FUNCTION rpc_sum(bigint) RETURNS bigint PROPERTIES (
"TYPE"="RPC",
"OBJECT_FILE"="127.0.0.1:9700",
"update_fn"="rpc_sum_update",
"merge_fn"="rpc_sum_merge",
"finalize_fn"="rpc_sum_finalize"
);
MySQL [test_db]> select citycode, rpc_sum(pv) from table2 group by citycode;
+----------+---------------+
| citycode | rpc_sum(`pv`) |
+----------+---------------+
| 15 | 564 |
| 11 | 195 |
| 12 | 612 |
| 16 | 237 |
+----------+---------------+
4 rows in set (0.067 sec)
MySQL [test_db]> select rpc_sum(pv) from table2;
+---------------+
| rpc_sum(`pv`) |
+---------------+
| 1608 |
+---------------+
1 row in set (0.030 sec)
```
### 3. avg pv
```
CREATE AGGREGATE FUNCTION rpc_avg(int) RETURNS double PROPERTIES (
"TYPE"="RPC",
"OBJECT_FILE"="127.0.0.1:9000",
"update_fn"="rpc_avg_update",
"merge_fn"="rpc_avg_merge",
"finalize_fn"="rpc_avg_finalize"
);
MySQL [test_db]> select citycode, rpc_avg(pv) from table2 group by citycode;
+----------+---------------+
| citycode | rpc_avg(`pv`) |
+----------+---------------+
| 15 | 188 |
| 11 | 65 |
| 12 | 102 |
| 16 | 79 |
+----------+---------------+
4 rows in set (0.039 sec)
MySQL [test_db]> select rpc_avg(pv) from table2;
+---------------+
| rpc_avg(`pv`) |
+---------------+
| 107.2 |
+---------------+
1 row in set (0.028 sec)
```
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [ ] No
- [ ] I don't know
2. Has unit tests been added:
- [ ] Yes
- [ ] No
- [ ] No Need
3. Has document been added or modified:
- [ ] Yes
- [ ] No
- [ ] No Need
4. Does it need to update dependencies:
- [ ] Yes
- [ ] No
5. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [ ] No
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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