__aliasMarker refactoring to cover complex cases with ALIASes (antalya-26.3)#1844

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filimonov wants to merge 33 commits into

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feature/antalya-26.3/alias_marker_fixes

Commits on May 27, 2026

Analyzer: fix __aliasMarker
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Add distributed alias marker regressions
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Consolidate distributed alias regression tests
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Fix distributed alias marker handling
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Tighten alias marker serialization contract
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Preserve nested __aliasMarker chains across hops
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Add distributed-over-distributed double alias marker test
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Fix remote/local header remap by name when safe
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Revert "Fix remote/local header remap by name when safe"
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Add DoD regression for alias column swap with enable_alias_marker=0
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tests: add DoD+parallel replicas alias column-swap reproducer
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Planner: prefer name-based conversion with position fallback
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test: plain-Distributed alias column-swap reproducer (PlannerJoinTree)

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test: parallel-replicas alias column-swap reproducer (findParallelReplicasQuery)

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test: natural Merge-over-Distributed alias reproducer (failing)

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Fix StorageMerge alias columns over Distributed by emitting identifier names

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test: distributed alias reorder + computed-expression correctness

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test: Hybrid unknown-table regression for issues #1208 #1209 #1422

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StorageMerge: drop redundant short-name reconciliation heuristics

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tests: remove contradictory marker-off DoD alias-swap tests (03925, 03926)

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Address review findings on the __aliasMarker / header-reconciliation changes

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StorageMerge: use Nested::splitName for analyzer-identifier suffix extraction

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test: make 03928 deterministic across architectures

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test: pin serialize_query_plan=0 in 03923 and 03934

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Document enable_alias_marker escape hatch for mixed-version clusters

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test: make 03931 parallel-replicas alias test deterministic

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Commits on May 28, 2026