feat: bulk memtable codec #4163
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #4163 +/- ##
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- Coverage 85.06% 84.79% -0.27%
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Files 1028 1034 +6
Lines 180477 182435 +1958
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+ Hits 153514 154697 +1183
- Misses 26963 27738 +775 |
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WalkthroughThe updates introduce several new functionalities to the Changes
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Actionable comments posted: 5
Outside diff range and nitpick comments (1)
src/mito2/src/sst.rs (1)
43-64: Function Implementation:to_sst_arrow_schemaThis function constructs an Arrow schema from metadata, filtering fields based on their semantic type and including internal fields. The use of
Arcto wrap the Schema is appropriate for shared ownership. However, the filtering logic inside thezipandfilter_mapcould be refined for clarity or performance.Consider refactoring the filtering logic for better readability and possibly improved performance.
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Review profile: CHILL
Files selected for processing (11)
- src/mito2/src/memtable.rs (3 hunks)
- src/mito2/src/memtable/bulk.rs (1 hunks)
- src/mito2/src/memtable/bulk/part.rs (1 hunks)
- src/mito2/src/memtable/key_values.rs (2 hunks)
- src/mito2/src/memtable/partition_tree.rs (2 hunks)
- src/mito2/src/memtable/time_series.rs (2 hunks)
- src/mito2/src/row_converter.rs (2 hunks)
- src/mito2/src/sst.rs (2 hunks)
- src/mito2/src/sst/parquet.rs (1 hunks)
- src/mito2/src/sst/parquet/format.rs (10 hunks)
- src/mito2/src/test_util/memtable_util.rs (2 hunks)
Additional comments not posted (15)
src/mito2/src/memtable/bulk.rs (1)
34-37: Struct Definition:BulkMemtableThis struct definition is well-formed and clear, encapsulating the necessary fields for bulk operations in memtables.
src/mito2/src/sst.rs (1)
67-83: Function Implementation:internal_fieldsThe method correctly defines internal fields for the schema, setting them as not nullable. The use of
Field::new_dictionaryandField::newis appropriate for defining the schema fields. This method is crucial for ensuring that internal metadata like sequence numbers and operation types are included in the schema.src/mito2/src/test_util/memtable_util.rs (1)
82-84: Method Implementation:write_bulkinEmptyMemtableThe method is correctly implemented to immediately return success, which is suitable for a dummy or test implementation. This helps in testing the bulk write functionality without actual data manipulation.
src/mito2/src/memtable.rs (1)
105-106: Method Addition:write_bulkinMemtableTraitThe addition of the
write_bulkmethod to theMemtabletrait is a significant enhancement for supporting bulk operations. This method should be well-documented to ensure correct implementation across different memtable types.src/mito2/src/memtable/key_values.rs (2)
29-29: Visibility Change ApprovedThe visibility of the
mutationfield inKeyValuesstruct has been changed topub(crate). While this is fine, it would be beneficial to add a comment explaining why this change was necessary for clarity and maintainability.
68-112: New StructKeyValuesRefIntroducedThe introduction of the
KeyValuesRefstruct is a good addition for managing references toKeyValueswithout ownership transfer, which can enhance performance in scenarios where mutations are frequently accessed but not modified. Ensure that the usage of this struct throughout the codebase is consistent and that it adheres to Rust's safety and performance standards.src/mito2/src/sst/parquet.rs (1)
26-26: Visibility Change ApprovedThe visibility of the
formatmodule has been changed topub(crate). This change is approved; however, adding a comment explaining the rationale behind this increased visibility would enhance code maintainability and clarity.src/mito2/src/row_converter.rs (1)
283-291: New Constructor Methodnew_with_primary_keysThe addition of the
new_with_primary_keysmethod in theMcmpRowCodecstruct is a thoughtful addition, especially for operations that require only the primary keys. This method should be used carefully to ensure that it is applied correctly in scenarios that specifically require primary key handling.src/mito2/src/memtable/bulk/part.rs (6)
15-15: Document Purpose ClearlyThe file-level comment
//! Bulk part encoder/decoder.succinctly describes the purpose. It's always good practice to ensure that such top-level documentation is comprehensive enough to give new developers a clear understanding of the module's responsibilities.
44-57: New Struct: BulkPartThe
BulkPartstruct is well-defined with appropriate data encapsulation. The use ofpub(crate)for themetadatamethod restricts its visibility within the crate, which is a good practice for encapsulation.
60-76: New Struct: BulkPartMeta with Default ImplementationThe
BulkPartMetastruct is introduced with a default implementation. This seems appropriate for initializing metadata with sensible default values. However, consider documenting the rationale behind the chosen default values, especially formax_timestampandmin_timestamp.
79-110: BulkPartEncoder ImplementationThe
BulkPartEncoderstruct and its methodencode_mutationsare crucial for encoding mutations into aBulkPart. The method handles errors using theResulttype and uses context from thesnafucrate for better error messages. This is a robust implementation ensuring that all potential errors are well-handled.
319-354: Dictionary Encoding FunctionThe function
binary_array_to_dictionaryis well-implemented with checks for empty input and clear handling of the dictionary encoding process. The use of explicit types and careful management of memory with builders are best practices in Rust for handling complex data structures.
356-660: Comprehensive TestingThe tests provided are comprehensive and cover various scenarios for the
binary_array_to_dictionaryfunction andmutations_to record_batchfunction. This is excellent as it ensures that the functionality is verified under different conditions. Always ensure that edge cases are also considered in your tests.
[APROVED]src/mito2/src/sst/parquet/format.rs (1)
Line range hint
113-523: Refactoring and visibility changes inReadFormat.The
ReadFormatstruct has undergone significant refactoring, with methods being made public and some functionalities reorganized. Ensure that the increased visibility of these methods aligns with your project's architectural guidelines and does not expose unnecessary internal details.Verification successful
Visibility changes in
ReadFormatstruct methods are appropriate.The public methods in the
ReadFormatstruct are widely used across the codebase, indicating their necessity and proper usage. The methods do not expose any sensitive operations and align well with the overall architecture.
ReadFormat::newReadFormat::arrow_schemaReadFormat::metadataReadFormat::projection_indicesReadFormat::convert_record_batchReadFormat::min_valuesReadFormat::max_valuesReadFormat::null_countsReadFormat::field_index_by_idReadFormat::new_with_all_columnsScripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the newly public methods do not expose sensitive operations. # Test: Search for usage of public methods in other modules. Expect: Methods used appropriately without exposing sensitive data. rg --type rust $'pub fn' src/mito2/src/sst/parquet/format.rsLength of output: 482
Script:
#!/bin/bash # Description: Check for usage of public methods from ReadFormat in the entire codebase. # Search for the usage of `new` method rg 'ReadFormat::new' --type rust # Search for the usage of `arrow_schema` method rg 'arrow_schema' --type rust # Search for the usage of `metadata` method rg 'metadata' --type rust # Search for the usage of `projection_indices` method rg 'projection_indices' --type rust # Search for the usage of `convert_record_batch` method rg 'convert_record_batch' --type rust # Search for the usage of `min_values` method rg 'min_values' --type rust # Search for the usage of `max_values` method rg 'max_values' --type rust # Search for the usage of `null_counts` method rg 'null_counts' --type rust # Search for the usage of `field_index_by_id` method rg 'field_index_by_id' --type rust # Search for the usage of `new_with_all_columns` method rg 'new_with_all_columns' --type rustLength of output: 332391
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Actionable comments posted: 4
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Files selected for processing (6)
- src/mito2/src/error.rs (2 hunks)
- src/mito2/src/memtable.rs (3 hunks)
- src/mito2/src/memtable/bulk.rs (1 hunks)
- src/mito2/src/memtable/bulk/part.rs (1 hunks)
- src/mito2/src/memtable/partition_tree.rs (2 hunks)
- src/mito2/src/memtable/time_series.rs (2 hunks)
Additional comments not posted (6)
src/mito2/src/memtable.rs (1)
105-107: Newwrite_bulkmethod inMemtabletrait.The addition of the
write_bulkmethod is a good enhancement, supporting bulk write operations as per the PR's objectives.src/mito2/src/memtable/bulk/part.rs (1)
86-110: Well-implementedencode_mutationsmethod.The
encode_mutationsmethod is well-implemented, handling complex operations with appropriate error context and robust error handling.src/mito2/src/memtable/partition_tree.rs (1)
151-156: Review of the unimplementedwrite_bulkmethod.The
write_bulkmethod is currently unimplemented and throws anUnsupportedOperationSnafuerror. This is acceptable during the development phase, but it is important to track the progress towards its implementation or decision on its necessity.src/mito2/src/error.rs (2)
748-754: Well-defined new error typeUnsupportedOperation.The
UnsupportedOperationerror type is well integrated with the existing error handling system. The use ofsnafu(display)for custom error messages andsnafu(implicit)for location tracking follows best practices in Rust error handling.
872-872: Correct status code mapping forUnsupportedOperation.The mapping of
UnsupportedOperationtoStatusCode::InvalidArgumentsis appropriate and aligns well with the intended use of this error type, providing clear feedback on the nature of the error in API responses.src/mito2/src/memtable/time_series.rs (1)
230-235: Clarify the implementation status ofwrite_bulkmethod.The
write_bulkmethod is currently marked as unimplemented and directly raises anUnsupportedOperationSnafu. It's important to add documentation or comments explaining that this is a placeholder for future functionality and what the expected behavior should be once implemented. This helps maintain clarity and manage expectations for other developers.
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Actionable comments posted: 3
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Files selected for processing (6)
- src/mito2/src/error.rs (2 hunks)
- src/mito2/src/memtable.rs (3 hunks)
- src/mito2/src/memtable/bulk.rs (1 hunks)
- src/mito2/src/memtable/bulk/part.rs (1 hunks)
- src/mito2/src/memtable/partition_tree.rs (2 hunks)
- src/mito2/src/memtable/time_series.rs (2 hunks)
Additional comments not posted (11)
src/mito2/src/memtable/bulk.rs (3)
33-42: Review ofBulkMemtablestructure andidmethod.The
BulkMemtablestructure is well-defined with appropriate debug traits. Theidmethod is implemented correctly, providing the ID of the memtable.
44-50: Review ofwriteandwrite_onemethods.Both methods are correctly marked as unimplemented, which aligns with the intended use case for bulk operations only. This approach prevents misuse of the API in contexts that are not supported.
78-83: Review of theforkmethod inBulkMemtable.The method correctly creates a new instance of
BulkMemtablewith a new ID and empty parts. This is essential for operations that require a fresh state in a new memtable based on the current one.src/mito2/src/memtable.rs (4)
105-107: Addition ofwrite_bulkmethod toMemtabletrait.The method is appropriately defined to handle bulk writes, which is a critical feature for performance optimization in bulk operations scenarios.
21-21: Visibility and modularity ofBulkPartand module organization.The
pub usestatement forBulkPartenhances modularity by allowing other parts of the application to useBulkPartdirectly. Additionally, the organization of submodules within the file is logical and promotes a clean architecture.Also applies to: 38-38
105-107: Review ofAllocTrackerand its methods.The
AllocTrackeris well-implemented with methods that handle memory allocation tracking robustly. The methods are designed to ensure that memory tracking and management are accurate and efficient, which is crucial for the system's performance and stability.
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362-666: Comprehensive coverage in test cases.The test cases provided are comprehensive, covering various scenarios and edge cases. This ensures that the functionality is robust and behaves as expected under different conditions.
src/mito2/src/memtable/bulk/part.rs (2)
44-66: Review ofBulkPartandBulkPartMetastructures.Both structures are well-defined with appropriate metadata fields. The use of
Debugtrait enhances the debuggability of the system. The methods associated with these structures are correctly implemented to facilitate their usage in bulk operations.
118-282: Utility functions for processing record batches.The functions for converting mutations to record batches and sorting arrays are well-implemented. They handle complex data transformations and sorting efficiently, which is crucial for the performance of bulk operations.
src/mito2/src/error.rs (1)
748-754: Review of the newUnsupportedOperationerror type.The addition of the
UnsupportedOperationerror type seems well-integrated with the existing error handling structure. The mapping toStatusCode::InvalidArgumentsis appropriate given the context. However, ensure that all occurrences of this error type being raised are accompanied by meaningful error messages that accurately describe the unsupported operation.Also applies to: 872-872
src/mito2/src/memtable/time_series.rs (1)
230-235: Clarify the implementation status ofwrite_bulkmethod.The
write_bulkmethod is currently marked as unimplemented. It's important to add documentation or comments explaining that this is a placeholder for future functionality and what the expected behavior should be once implemented. This helps maintain clarity and manage expectations for other developers.
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Actionable comments posted: 6
Outside diff range and nitpick comments (1)
src/mito2/src/sst/parquet/format.rs (1)
Line range hint
200-248: Optimize theconvert_record_batchmethod for better performance and error handling.The method
convert_record_batchperforms several operations that could be optimized. For instance, the use ofunwrapin a production environment should be avoided as it can cause the program to panic if an error occurs. Additionally, the method does a lot of array slicing, which could be optimized or reduced.- let op_type_array = fixed_pos_columns.next().unwrap(); + let op_type_array = fixed_pos_columns.next().ok_or_else(|| InvalidRecordBatchSnafu { + reason: "Expected op_type array is missing".to_string(), + })?; - let primary_key = pk_values.value(dict_key.into()).to_vec(); + let primary_key = pk_values.value(dict_key.into()).to_vec(); // Consider if copying here is necessary or if a reference could be used.
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Files selected for processing (11)
- src/mito2/src/error.rs (2 hunks)
- src/mito2/src/memtable.rs (3 hunks)
- src/mito2/src/memtable/bulk.rs (1 hunks)
- src/mito2/src/memtable/bulk/part.rs (1 hunks)
- src/mito2/src/memtable/key_values.rs (2 hunks)
- src/mito2/src/memtable/partition_tree.rs (2 hunks)
- src/mito2/src/memtable/time_series.rs (2 hunks)
- src/mito2/src/row_converter.rs (2 hunks)
- src/mito2/src/sst.rs (2 hunks)
- src/mito2/src/sst/parquet/format.rs (10 hunks)
- src/mito2/src/test_util/memtable_util.rs (2 hunks)
Additional comments not posted (15)
src/mito2/src/memtable/bulk.rs (2)
58-64: Implement or document theitermethod.The
itermethod is currently not implemented and marked withtodo!(). It's important to either implement this method or document its future implementation plans to avoid confusion. This ensures that other developers or users of the library have clear expectations about the functionality.
82-84: Implement or document thestatsmethod.The
statsmethod is also marked withtodo!()and not implemented. Consider implementing this method or clearly documenting its intended future implementation. This would help in providing complete functionality or guiding future developers on what needs to be done.src/mito2/src/sst.rs (2)
43-64: Review ofto_sst_arrow_schemafunction.This function constructs an Arrow schema for storing in Parquet based on metadata. The implementation uses functional programming paradigms effectively, with clear filtering and mapping steps. However, there is potential for optimization in the way fields are iterated and filtered. Consider caching results that are reused or simplifying the logic to improve readability and performance.
67-83: Optimize theinternal_fieldsfunction for clarity and maintenance.The function defines internal fields for a schema, which are marked as non-nullable. The current implementation is clean, but consider using a shared utility function if similar patterns are used elsewhere in the codebase to define fields, to reduce duplication and improve maintainability.
src/mito2/src/test_util/memtable_util.rs (1)
79-81: Proper implementation ofwrite_bulkmethod in test utility.The
write_bulkmethod inEmptyMemtableis implemented to always returnOk(()), which is appropriate for a test utility that simulates the behavior without performing actual operations. This is good for unit testing environments where interactions with the actual data layer are to be avoided.src/mito2/src/memtable.rs (1)
105-107: Implementation of thewrite_bulkmethod.The
write_bulkmethod is added to theMemtabletrait, allowing for bulk operations. This is a significant enhancement for performance when dealing with large volumes of data. Ensure that all implementations of this trait handle this method appropriately, especially in terms of error handling and data consistency.src/mito2/src/memtable/key_values.rs (2)
29-29: Visibility Restriction ApprovedChanging the
mutationfield topub(crate)is a good practice for encapsulating the internal state within the crate.
68-112: New StructKeyValuesRefAppropriately AddedThe addition of
KeyValuesRefprovides a non-owning view over mutations, which is useful for performance and API flexibility. The implementation follows Rust's safety and error handling conventions effectively.src/mito2/src/row_converter.rs (1)
283-291: Enhanced Codec Initialization ApprovedThe
new_with_primary_keysmethod enhances theMcmpRowCodecby allowing it to be initialized directly with primary keys from the given metadata. This is a significant improvement for ensuring the codec's configuration aligns with the data characteristics.src/mito2/src/memtable/bulk/part.rs (4)
44-57: Review ofBulkPartstruct and associated methods.The
BulkPartstruct is well-defined with clear responsibilities. The constructor methodnewand the metadata access method are implemented correctly. The usage ofpub(crate)for themetadatamethod ensures encapsulation within the crate, which is a good practice for internal APIs.
60-77: Review ofBulkPartMetastruct and its default implementation.The struct and its default values are appropriate for the intended use. Initializing
max_timestampwithi64::MINandmin_timestampwithi64::MAXis a common pattern to simplify the update logic during data processing. This implementation is both logical and efficient.
79-110: Review ofBulkPartEncoderandencode_mutationsmethod.The method correctly handles the encoding of mutations into a
BulkPart. The use ofArrowWriterand the proper handling of errors using the context provided byEncodeMemtableSnafuare commendable. Updating theBulkPartmetadata after encoding ensures that the metadata accurately reflects the state of the data. This method is well-implemented with appropriate error handling and performance considerations.
118-282: Review of data processing functions:mutations_to_record_batchandsort_arrays_to_record_batch.Both functions are crucial for the data processing pipeline. The
mutations_to_record_batchfunction efficiently processes mutations into a format suitable for record batches, respecting the metadata and deduplication settings. Thesort_arrays_to_record_batchfunction handles the sorting and potential deduplication of data, ensuring data integrity and order. The use of iterators and efficient sorting mechanisms insort_arrays_to_record_batchis particularly noteworthy for performance.src/mito2/src/error.rs (1)
757-762: The addition of theUnsupportedOperationerror variant is well-implemented.The new error variant follows the established patterns and uses the
snafucrate effectively. It includes an error message and a location, which are essential for debugging.src/mito2/src/sst/parquet/format.rs (1)
Line range hint
113-129: Ensure that sorting and collecting logic is optimal innewmethod.The method
newforReadFormatinvolves several operations on collections like sorting and collecting. It's essential to ensure these operations are as efficient as possible, especially given that they are part of the initialization ofReadFormat, which might be performance-critical.Verification successful
The
newmethod inReadFormatincludes sorting and collecting logic forfield_id_to_index. Here is the relevant snippet from the method:impl ReadFormat { /// Creates a helper with existing `metadata` and `column_ids` to read. pub fn new( metadata: RegionMetadataRef, column_ids: impl Iterator<Item = ColumnId>, ) -> ReadFormat { let field_id_to_index: HashMap<_, _> = metadata .field_columns() .enumerate() .map(|(index, column)| (column.column_id, index)) .collect(); // Other initialization logic... } }Analysis:
- The
field_id_to_indexis created by enumerating overmetadata.field_columns()and collecting into aHashMap.- The
enumeratemethod adds an index to each item, andmapcreates a tuple of(column.column_id, index)for each column.- The
collectmethod gathers these tuples into aHashMap.Efficiency:
- The current implementation is straightforward and leverages Rust's iterator combinators effectively.
- The use of
enumerateandmapis efficient for creating theHashMap.Conclusion:
The sorting and collecting logic in the
newmethod appears to be optimal and efficient. No changes are necessary.Verified: The sorting and collecting logic in the
newmethod ofReadFormatis efficient and does not require modifications.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the performance impact of sorting and collecting logic in the `new` method. # Test: Profile the method under typical and high load scenarios. echo "Profiling the new method under typical and high load scenarios..."Length of output: 140
Script:
#!/bin/bash # Locate the implementation of the `new` method in the `ReadFormat` struct ast-grep --lang rust --pattern $'impl ReadFormat { pub fn new($_) { $$$ } }'Length of output: 85
Script:
#!/bin/bash # Search for the `new` method implementation in the `ReadFormat` struct across the entire repository rg -A 10 'impl ReadFormat {' --glob '*.rs'Length of output: 142
Script:
#!/bin/bash # Correct the regex pattern and search for the `new` method implementation in the `ReadFormat` struct across the entire repository rg -A 10 'impl ReadFormat \{' --glob '*.rs'Length of output: 1614
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Actionable comments posted: 1
Review details
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Files selected for processing (4)
- src/mito2/src/error.rs (2 hunks)
- src/mito2/src/memtable.rs (3 hunks)
- src/mito2/src/memtable/bulk/part.rs (1 hunks)
- src/mito2/src/sst/parquet/format.rs (10 hunks)
Files skipped from review as they are similar to previous changes (3)
- src/mito2/src/error.rs
- src/mito2/src/memtable.rs
- src/mito2/src/sst/parquet/format.rs
Additional comments not posted (4)
src/mito2/src/memtable/bulk/part.rs (4)
44-58: Review of theBulkPartstruct and its implementationThe
BulkPartstruct is well-defined with clear, concise documentation and appropriate visibility settings for its methods. The struct initialization and metadata retrieval are straightforward and follow Rust's idiomatic practices.
60-75: Review of theBulkPartMetastruct and its default implementationThe default values for
max_timestampandmin_timestampare set correctly to represent the extreme possible values, which is a good practice for initialization before actual data handling. This ensures that any real timestamp will replace these placeholder values.[APROVED]
77-109: Review of theBulkPartEncoderstruct andencode_mutationsmethodThe
encode_mutationsmethod is robust, handling cases where there are no mutations to encode by returning early. This is an efficient design choice that avoids unnecessary processing. The use ofArrowWriterwithin a block ensures that resources are managed correctly and the scope of variables is limited, which is good for maintainability.
117-324: Review of themutations_to_record_batchfunction and related sorting logicThe function is complex but appears to be well-structured following the recent refactor. The use of
ArraysSorterto handle the sorting and deduplication of data is a clean approach that separates concerns effectively. The detailed debug assertions help ensure the integrity of the data throughout the sorting process, which is crucial for maintaining data consistency.
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Files selected for processing (1)
- src/mito2/src/memtable/bulk/part.rs (1 hunks)
Additional comments not posted (2)
src/mito2/src/memtable/bulk/part.rs (2)
46-59: Struct definition and implementation forBulkPartThe
BulkPartstruct is well-defined with appropriate fields for handling bulk data. Thenewmethod is straightforward and correctly initializes the struct. Themetadatamethod provides safe access to the metadata, which is good practice in Rust to ensure data encapsulation and integrity.
61-76: Default implementation forBulkPartMetaThe default values for
max_timestampandmin_timestampare set to their respective extremes, which is a sensible default to ensure that any actual timestamp will update these values correctly. This implementation is clear and follows Rust conventions.
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Files selected for processing (1)
- src/mito2/src/memtable/bulk/part.rs (1 hunks)
Additional comments not posted (3)
src/mito2/src/memtable/bulk/part.rs (3)
15-15: Documentation is clear and concise.
45-59:BulkPartstruct design is efficient and well-documented.The
BulkPartstruct is designed efficiently with appropriate public and private access modifiers. The methodmetadata()is correctly encapsulated, providing safe read access to the metadata.
61-76:BulkPartMetastruct with sensible defaults.The implementation of the
Defaulttrait forBulkPartMetais sensible, setting initial values that indicate "unset" or "invalid" states which is a common practice in Rust for initialization.
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@WenyXu PTAL |
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What's changed and what's your intention?
Introduce bulk memtable encoder/decoder.
Checklist
Summary by CodeRabbit
New Features
BulkPart,BulkPartMeta, andBulkPartEncoder.write_bulkto write bulk data into the memtable.BulkMemtablefor handling bulk load operations.Enhancements
UnsupportedOperationto the error handling to indicate unsupported operations.McmpRowCodecwith a new method to initialize with primary keys.Bug Fixes