Files
greptimedb/src/metric-engine
Lei, HUANG dc98e0215b feat(metric-engine): support bulk inserts with put fallback (#7792)
* feat(metric-engine): support bulk inserts

Implement `RegionRequest::BulkInserts` to support efficient columnar data
ingestion in the metric engine.

Key changes:
- Implement `bulk_insert_region` to handle logical-to-physical region mapping
  and dispatch writes.
- Add `batch_modifier` for `RecordBatch` transformations, specifically for
  `__tsid` generation and sparse primary key encoding.
- Integrate `BulkInserts` into the `MetricEngine` request handling logic.
- Provide a row-based fallback mechanism if the underlying storage doesn't
  support bulk writes.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 ### Update `bulk_insert.rs` to Support Partition Expression Version

 - **Enhancements**:
   - Added support for `partition_expr_version` in `RegionBulkInsertsRequest` and `RegionPutRequest`.
   - Modified the handling of `partition_expr_version` to be dynamically set from the `request` object.

 Files affected:
 - `src/metric-engine/src/engine/bulk_insert.rs`

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* fix: cargo lock revert

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* add doc for conversions

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* chore: simplify test

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 ### Refactor `bulk_insert.rs` in `metric-engine`

 - **Refactor Functionality**:
   - Replaced `resolve_tag_columns` with `resolve_tag_columns_from_metadata` to streamline tag column resolution.
   - Moved logic for resolving tag columns directly into `resolve_tag_columns_from_metadata`, removing the need for an external function call.
 - **Enhancements**:
   - Improved error handling and context provision for missing physical regions and columns.
   - Optimized tag column sorting and index management within the batch processing logic.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 ### Refactor `record_batch_to_rows` Function in `bulk_insert.rs`

 - Simplified the `record_batch_to_rows` function by removing the `logical_metadata` parameter and directly validating column types within the function.
 - Enhanced error handling for timestamp, value, and tag columns by checking their data types and providing detailed error messages.
 - Replaced the use of `Helper::try_into_vector` with direct downcasting to `TimestampMillisecondArray`, `Float64Array`, and `StringArray` for improved type safety and clarity.
 - Updated the construction of `api::v1::Rows` to directly handle null values and construct `api::v1::Value` objects accordingly.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 ## Commit Message

 Refactor `bulk_insert.rs` to optimize state access

 - Moved the state read operation inside a new block to limit its scope and improve code clarity.
 - Adjusted logic for processing `tag_columns` and `non_tag_indices` to work within the new block structure.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 ### Refactor `compute_tsid_array` Function

 - **Refactored `compute_tsid_array` function**: Modified the function signature to accept `tag_arrays` as a parameter instead of building it internally. This change affects the following files:
   - `src/metric-engine/src/batch_modifier.rs`

 - **Updated test cases**: Adjusted test cases to accommodate the new `compute_tsid_array` function signature by passing `tag_arrays` explicitly.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* docs: add doc for bulk_insert_region

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 ### Commit Message

 Refactor `bulk_insert.rs` in `metric-engine`:

 - Removed error handling for unsupported status codes in `write_data` method.
 - Eliminated `record_batch_to_rows` function, simplifying the data insertion process.
 - Streamlined the `write_data` method by removing fallback logic for unsupported operations.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 - **Optimize Primary Key Construction**: Refactored `modify_batch_sparse` in `batch_modifier.rs` to use `BinaryBuilder` for more efficient primary key construction.
 - **Add Fallback for Unsupported Bulk Inserts**: Updated `bulk_insert.rs` to handle unsupported bulk inserts by converting record batches to rows and using `RegionPutRequest`.
 - **Implement Record Batch to Rows Conversion**: Added `record_batch_to_rows` function in `bulk_insert.rs` to convert `RecordBatch` to `api::v1::Rows` for fallback operations.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 Add test for handling null values in `record_batch_to_rows`

 - Added a new test `test_record_batch_to_rows_with_null_values` in `bulk_insert.rs` to verify the handling of null values in the `record_batch_to_rows` function.
 - The test checks the conversion of a `RecordBatch` with null values in various fields to ensure correct row creation and schema handling.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

* feat/metric-engine-bulk-insert:
 Add fallback path for unsupported status and improve error context handling

 - **`bulk_insert.rs`**:
   - Added a fallback path for `PartitionTreeMemtable` in case of unsupported status code.
   - Enhanced error handling by using `with_context` for better error messages when timestamp and value columns are not found in `RecordBatch`.

Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>

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Signed-off-by: Lei, HUANG <mrsatangel@gmail.com>
2026-03-17 11:28:06 +00:00
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