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lancedb/docs/src/js/interfaces/BranchDiff.md
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Drew Gallardo e98d8ac685 feat!: rename branch merge to cherry_pick (#3986)
This PR is a **breaking** rename of #3686.

merge reads like git merge w/ three-way, replay history, combine two
lines of work. That is not this API.

This call takes one additive change on a branch and lands it on main.
New column, including a blob column. Main's existing columns are not
rewritten. If it cannot land, you get `status="failed"` and
`diff.errors`, not a merge conflict to resolve.

Cherry-pick is terminology that aligns more with that.

```python
table = db.open_table("images")
table.branches.create("exp")
exp = table.branches.checkout("exp")

exp.add_columns({"tag": "cast('draft' as string)"})

diff = table.branches.diff("exp")
preview = table.branches.cherry_pick("exp", dry_run=True)
result = table.branches.cherry_pick("exp")

if result["status"] == "cherryPicked":
    print("landed at", result["mainVersionAfter"])
elif result["status"] == "failed":
    print(result["diff"]["errors"])
```

### Behavior

- Remote / Enterprise only. Local still NotSupported.
- HTTP 409 is not an exception. It is Ok with status="failed" and
diff.errors (CherryPickError).
- Unknown error / status codes still parse as Unknown.
- Requests are not retried. 409 is final and carries the body.
- Endpoint is POST /v1/table/{id}/branches/cherry_pick/.
- merge_insert and Table.merge are unchanged.

### Testing
- `cargo test -p lancedb --features remote diff_branch`
- `cargo test -p lancedb --features remote cherry_pick`
- `pytest python/python/tests/test_remote_db.py -k cherry_pick`
- node `remote.test.ts` diffs / cherry-picks path
2026-08-21 23:37:12 -07:00

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Markdown

[**@lancedb/lancedb**](../README.md) • **Docs**
***
[@lancedb/lancedb](../globals.md) / BranchDiff
# Interface: BranchDiff
Read-only comparison of a branch against main.
## Properties
### addedColumns
```ts
addedColumns: BranchColumnSummary[];
```
***
### addedIndexes
```ts
addedIndexes: BranchIndexSummary[];
```
***
### baseMoved
```ts
baseMoved: boolean;
```
***
### branchVersion
```ts
branchVersion: number;
```
***
### changedColumns
```ts
changedColumns: BranchColumnChange[];
```
***
### errors
```ts
errors: CherryPickError[];
```
***
### fromBranch
```ts
fromBranch: string;
```
***
### mainVersion
```ts
mainVersion: number;
```
***
### parentVersion
```ts
parentVersion: number;
```
***
### removedColumns
```ts
removedColumns: BranchColumnSummary[];
```
***
### removedIndexes
```ts
removedIndexes: BranchIndexSummary[];
```
***
### rowCountBranch
```ts
rowCountBranch: number;
```
***
### rowCountMain
```ts
rowCountMain: number;
```
***
### rowSummary
```ts
rowSummary: BranchRowCountSummary;
```