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Unnecessary index rebuilds in UNION ALL

Details

Detail name	Value
Changelog Number	21052
Type	Bug
Status	Resolved
Affected Versions	Exasol 7.1.0, Exasol 8.0.0
Fix Versions	Exasol 2025.1.0, Exasol 8.29.11
Resolution Date	2025-07-08

Description

Under specific circumstances (hashing mismatch) it is possible for UNION ALL statements to rebuild global indices even when matching indices exist. This result in unnecessary index rebuilds and potentially prolonged execution of statements triggering such a rebuild.

Workaround

There are no straightforward workarounds.

Fix

There are no unnecessary index rebuilds.

Unnecessary index rebuilds in UNION ALL

Details

Description

Workaround

Fix

PRODUCT

RESOURCES