[BugFix] Fix CTE lowcardinality array couldn't found DictExpr (backport #51148) #51203
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Why I'm doing:
reproduce case:
What I'm doing:
Fixes #issue
What type of PR is this:
Does this PR entail a change in behavior?
If yes, please specify the type of change:
Checklist:
Bugfix cherry-pick branch check:
This is an automatic backport of pull request #51148 done by [Mergify](https://mergify.com). ## Why I'm doing: reproduce case: ``` CREATE TABLE `uid_connections` ( `uid` int(11) NOT NULL COMMENT "", `connections` array NOT NULL COMMENT "" ) ENGINE=OLAP DUPLICATE KEY(`uid`) COMMENT "OLAP" DISTRIBUTED BY HASH(`uid`) BUCKETS 4 PROPERTIES ( "compression" = "LZ4", "fast_schema_evolution" = "true", "replicated_storage" = "false", "replication_num" = "1" );
insert into uid_connections values (1, ['k1','k2','k3']);
set cbo_cte_reuse_rate=0;
with tmp as (select * from (select * from uid_connections)t, unnest(connections) where unnest in ('k1','k2','k3')) select *
from tmp union all select* from tmp;