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Fix logical error caused byNothing type incaseWithExpression function#92351

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The following query has logical error:

SELECT caseWithExpression(1, assumeNotNull(materialize(NULL)),1,1);

Changelog category (leave one):

  • Critical Bug Fix (crash, data loss, RBAC) or LOGICAL_ERROR

Changelog entry (auser-readable short description of the changes that goes into CHANGELOG.md):

Fix logical error caused by usingNothing type incaseWithExpression function arguments .Closes#85354.

Documentation entry for user-facing changes

  • Documentation is written (mandatory for new features)

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clickhouse-ghbot commentedDec 17, 2025
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Workflow [PR], commit [f3a8767]

Summary:

@clickhouse-ghclickhouse-ghbot added pr-critical-bugfix pr-must-backportPull request should be backported intentionally. Use this label with great care! labelsDec 17, 2025
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