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MR-771: demote Run to direct-publish via expected_table_versions CAS

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mutate_as and load now write directly to target tables and call the
publisher once at the end with per-table expected versions; the Run
state machine, _graph_runs.lance writers, __run__ staging branches,
and server /runs/* endpoints are removed. Multi-statement mutations
remain atomic at the manifest level via an in-memory MutationStaging
accumulator that gives read-your-writes within a query and a single
publish at the end. Concurrent-writer conflicts surface as
ExpectedVersionMismatch (HTTP 409 manifest_conflict) instead of the
old DivergentUpdate merge shape. Documents one known limitation in
docs/runs.md: a multi-statement mid-query failure where op-N writes
a Lance fragment and op-N+1 fails leaves Lance HEAD ahead of the
manifest until a follow-up introduces per-table Lance branches.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Ragnor Comerford 2026-04-30 08:52:50 +02:00
parent 4e5374a85e
commit 35be20cb05
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28 changed files with 1188 additions and 3216 deletions
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23
crates/omnigraph/src/exec/merge.rs
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@ -996,32 +996,21 @@ impl Omnigraph {
self.ensure_schema_apply_idle("branch_merge").await?;
let previous_actor = self.audit_actor_id.clone();
self.audit_actor_id = actor_id.map(str::to_string);
let result = self.branch_merge_impl(source, target, false).await;
let result = self.branch_merge_impl(source, target).await;
self.audit_actor_id = previous_actor;
result
}
pub(crate) async fn branch_merge_internal(
&mut self,
source: &str,
target: &str,
) -> Result<MergeOutcome> {
self.branch_merge_impl(source, target, true).await
}
async fn branch_merge_impl(
&mut self,
source: &str,
target: &str,
allow_internal_refs: bool,
) -> Result<MergeOutcome> {
if !allow_internal_refs {
if is_internal_run_branch(source) || is_internal_run_branch(target) {
return Err(OmniError::manifest(format!(
"branch_merge does not allow internal run refs ('{}' -> '{}')",
source, target
)));
}
if is_internal_run_branch(source) || is_internal_run_branch(target) {
return Err(OmniError::manifest(format!(
"branch_merge does not allow internal run refs ('{}' -> '{}')",
source, target
)));
}
let source_branch = Omnigraph::normalize_branch_name(source)?;
let target_branch = Omnigraph::normalize_branch_name(target)?;