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Backport of #93814 to 25.8: Fix logical error in Map column types when used with empty tuple#1994

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Backport of #93814 to 25.8: Fix logical error in Map column types when used with empty tuple#1994
ianton-ru wants to merge 1 commit into
stable-25.8from
backport/25.8/93814

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Backport of ClickHouse#93814 by @nihalzp

Changelog category (leave one):

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

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Fix logical error in a rare case when empty tuple is used with Map column. Closes ClickHouse#93784. (ClickHouse#93814 by @nihalzp)

CI/CD Options

Exclude tests:

  • Fast test
  • Integration Tests
  • Stateless tests
  • Stateful tests
  • Performance tests
  • Aarch64 tests
  • All with ASAN
  • All with TSAN
  • All with MSAN
  • All with UBSAN
  • All with Coverage
  • All Regression
  • Disable CI Cache

Regression jobs to run:

  • Fast suites (mostly <1h)
  • Aggregate Functions (2h)
  • Alter (1.5h)
  • Benchmark (30m)
  • ClickHouse Keeper (1h)
  • Iceberg (2h)
  • LDAP (1h)
  • OAuth (5m)
  • Parquet (1.5h)
  • RBAC (1.5h)
  • SSL Server (1h)
  • S3 (2h)
  • S3 Export (2h)
  • Swarms (30m)
  • Tiered Storage (2h)

…array

Fix logical error in `Map` column types when used with empty tuple
@ianton-ru ianton-ru added 25.8 25.8 Altinity Stable backport Backport labels Jul 1, 2026
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github-actions Bot commented Jul 1, 2026

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Workflow [PR], commit [cba9643]

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