test(delta-harness): add merge-on-read matrix - #705
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Add the merge-on-read behavior matrix as a clean contribution on the revised RTAS stack, with local ownership of its format assertions. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Keep the foundation fixture surface limited to table primitives used by its 34 cases. Rename the DML scenario contributors so their scope and rejection semantics are explicit. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Move partitioned and null-row preparations into the DML layer that uses them. Rename the complete operation contribution to distinguish it from the representative foundation slice. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Move partitioning, lineage, metadata, and rename helpers into the RTAS layer and adopt the explicit DML operation naming from its parent. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Keep merge-on-read table construction and prepared states in a domain-specific fixture boundary while preserving the layer's 714-case catalog. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Summary
This PR adds merge-on-read preparations, DML replay, and physical/maintenance
contracts on top of RTAS. It contributes 320 cases on top of the 394-case RTAS
catalog, producing 714 combined cases.
Stack
delta-harness-rtasdelta-harness-mordelta-harness-branchDirect child: Branch and write-audit-publish, which routes writes through
merge-on-read tables and needs this contract first.
Scope
This layer owns merge-on-read preparations, row-level mutation replay under
merge-on-read, and merge-on-read-specific physical/maintenance behavior
(position-delete files, mode changes, live-delete interaction, metadata tables, time
travel, rollback, changelog limitations, compaction, snapshot expiration, manifest
rewriting, orphan removal). It excludes branch/WAP routing, which is the next layer's
scope.
Known limitations
No new known-bug skips. The 4 combined-catalog skips are RTAS's inherited pair
(
rtas.schema.incompatibleType.notSilentlyLossy,rtas.concurrency.replaceVersusAppend,each on Parquet and ORC).
Validation
git diff --checkagainst the parent tip