按分区过滤 system.parts (ClickHouse) 时出现异常

Question

我试图在 table internet_users 中执行删除分区带过滤器的查询

SELECT DISTINCT partition  
FROM system.parts 
WHERE database='users' and table='internet_users' and 
partition= '\'d2019-10-11\''

我也试过了

partition= 'd2019-10-11'
partition= toString('d2019-10-11')

过滤无效或出现异常

DB::Exception: Missing columns: 'd2019' while processing query: '(d2019 - 10) - 11', required columns: 'd2019', source columns: '_dummy' (version 19.15.2.2 (official build))

请帮助我成功编写工作过滤器，ClickHouse 将过滤条件读取为字符串，而不是表达式。我无法重新创建 table.

我将请求作为 URL 'query' 参数和选项发送 partition= '\'d2019-10-11\'' 在 1.1.54385 版本中成功运行。

另外在1.1.54385版本中system.parts中的分区列在19.15.2.2版本中system.parts中包含'd2019-10-11'，在19.15.2.2版本中包含d2019-10-11，同样不带引号.

SHOW CREATE TABLE users.internet_users

CREATE TABLE users.internet_users (`type` Nullable(String), `report_type_date` String) 
ENGINE = MergeTree 
PARTITION BY report_type_date ORDER BY oper_date SETTINGS index_granularity = 8192

Answer 1

为什么需要 report_type_date 作为字符串？真的很奇怪。

我无法重现问题

ClickHouse client version 19.15.2.2 (official build).
Connecting to localhost:9000 as user default.
Connected to ClickHouse server version 19.15.2 revision 54426.

CREATE TABLE internet_users (`type` Nullable(String), `report_type_date` String)  
ENGINE = MergeTree  PARTITION BY report_type_date ORDER BY tuple();

insert into internet_users values ('x', 'd2019-10-11');

SELECT
    partition,
    name,
    partition_id
FROM system.parts
WHERE active AND (table = 'internet_users') AND (partition = 'd2019-10-11')

┌─partition───┬─name───────────────────────────────────┬─partition_id─────────────────────┐
│ d2019-10-11 │ 1d3f8b04c0f3f7654e4391f6c7b73352_1_1_0 │ 1d3f8b04c0f3f7654e4391f6c7b73352 │
└─────────────┴────────────────────────────────────────┴──────────────────────────────────┘

partition 是一个 String ，不需要筛选引号。

curl -q 'http://localhost:8123/?query=SELECT%20partition%20FROM%20system.parts%20WHERE%20active%20AND%20(table%20%3D%20%27internet_users%27)%20AND%20(partition%20%3D%20%27d2019-10-11%27)'
d2019-10-11

按分区过滤 system.parts (ClickHouse) 时出现异常

Exception when filtering system.parts (ClickHouse) by partition

sql

http

filter

clickhouse