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den-crane avatar den-crane commented on September 21, 2024
SELECT map() 
from remote('127.0.0.{1,2}', system,one)
SETTINGS allow_experimental_analyzer=0
{}
{}


SELECT map() 
from remote('127.0.0.{1,2}', system,one)
SETTINGS allow_experimental_analyzer=1

DB::Exception: CAST AS Map from array requires nested tuple of 2 elements.

https://fiddle.clickhouse.com/535fe5c1-b10a-465d-bb27-0146058c6a5d

CREATE TABLE bug_repro_local
(
    `attributes` Map(LowCardinality(String), String)
)
ENGINE = Memory as select map('','');

SELECT if(1, attributes, map()) 
from remote('127.0.0.{1,2}', default,bug_repro_local)
limit 1 SETTINGS allow_experimental_analyzer=0
format Pretty;

   +------------+
   | attributes |
   +------------+
1. | {'':''}    |
   +------------+


SELECT if(1, attributes, map()) 
from remote('127.0.0.{1,2}', default,bug_repro_local)
limit 1 SETTINGS allow_experimental_analyzer=1
format Pretty;

DB::Exception: Not found column if(1_UInt8, __table1.attributes,

https://fiddle.clickhouse.com/160b5196-2915-4f60-95ba-a9a85e05044e

from clickhouse.

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