Rewrite delta matrix in rust

[AviAvni]

Summary by CodeRabbit

• New Features

  • Introduced a multi-edge matrix for handling multi-edge relationships in graphs.
  • Added a function for deleting edges from a graph data structure.

• Bug Fixes

  • Improved handling of edge encoding and iteration for better performance and accuracy.

• Chores

  • Updated dependency commit hashes to the latest versions.
  • Enhanced coverage analysis setup in the build process.

• Refactor

  • Replaced RG_Matrix with Delta_Matrix across various modules to improve matrix operations and functionality.

Benchmark Comparison 'master' <---> 'delta-matrix'

Benchmark List:

The following benchmarks were ran with the following settings:

Benchmark	Branch 'delta-matrix' Benchmark Duration	Branch 'master' Benchmark Duration	Number of Concurrent Clients	Commands Issued
NODE-BATCH-DELETE	20004	15001	1	1000
GRAPH500-SCALE_18-EF_16-1_HOP_MIXED_READ_65perc_WRITE_25perc_DEL_10perc	145000	135000	32	10000
SORT_ENTITIES	5002	5002	32	1000
UPDATE-BASELINE	50000	50001	32	1000000
EXPLICIT-EDGE-DELETION	10000	10001	1	1000
MIX_READ_WRITE	100000	90000	32	1000000
IMPLICIT-EDGE-DELETION	5004	5000	1	500
VARIABLE_LENGTH_EXPAND_INTO	5003	5004	32	1000
GRAPH500-SCALE_18-EF_16-3_HOP_MIXED_READ_75perc_WRITE_25perc	135001	125001	32	10000
INSPECT-EDGES	30001	30000	32	50000
GRAPH500-SCALE_18-EF_16-1_HOP_MIXED_READ_75perc_WRITE_25perc	115000	115001	32	10000
VARIABLE-LENGTH-FILTER	20000	20000	32	1000000
GRAPH500-SCALE_18-EF_16-2_HOP	215000	200000	32	1000000
NODE-INDEX-LOOKUP	25000	25001	32	1000
GRAPH500-SCALE_18-EF_16-1_HOP	25000	25000	32	1000000
allShortestPaths-4hop-10Kpaths	185000	190001	32	50000
ENTITY_COUNT	20000	20000	32	1000000
GRAPH500-SCALE_18-EF_16-2_HOP_MIXED_READ_75perc_WRITE_25perc	120000	110000	32	10000
GRAPH500-SCALE_18-EF_16-3_HOP	2240001	2260001	32	1000000
allShortestPaths-10hop-100Kpaths	125001	125001	32	3000

Benchmarks:

Benchmark 'NODE-BATCH-DELETE' (POTENTIAL IMPROVEMENT)

Overall Latency diff between baseline and current branch: -18.77%
(Less is better)

Internal Latency diff between baseline and current branch: -18.38%
(Less is better)

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xychart-beta
    title "NODE-BATCH-DELETE"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 4.059227 --> 15.238414
    bar [14.991715000000001, 0, 15.238414, 0]
    bar [0, 12.177681, 0, 12.437081000000001]

Loading

Benchmark 'GRAPH500-SCALE_18-EF_16-1_HOP_MIXED_READ_65perc_WRITE_25perc_DEL_10perc' (POTENTIAL IMPROVEMENT)

Overall Latency diff between baseline and current branch: -6.63%
(Less is better)

Internal Latency diff between baseline and current branch: -6.98%
(Less is better)

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xychart-beta
    title "GRAPH500-SCALE_18-EF_16-1_HOP_MIXED_READ_65perc_WRITE_25perc_DEL_10perc"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 4.469981333333333 --> 435.7589667
    bar [14.362048399999999, 0, 435.7589667, 0]
    bar [0, 13.409944, 0, 405.3600638]

Loading

Benchmark 'SORT_ENTITIES' (STABLE)

Overall Latency diff between baseline and current branch: 1.29%
(Less is better)

Internal Latency diff between baseline and current branch: 1.94%
(Less is better)

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xychart-beta
    title "SORT_ENTITIES"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 5.829993666666667 --> 69.764125
    bar [17.489981, 0, 68.439689, 0]
    bar [0, 17.715381, 0, 69.764125]

Loading

Benchmark 'UPDATE-BASELINE' (STABLE)

Overall Latency diff between baseline and current branch: 2.05%
(Less is better)

Internal Latency diff between baseline and current branch: 1.32%
(Less is better)

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xychart-beta
    title "UPDATE-BASELINE"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 0.01682465633333333 --> 1.4946289449999999
    bar [0.050473968999999994, 0, 1.4751408719999999, 0]
    bar [0, 0.051506742, 0, 1.4946289449999999]

Loading

Benchmark 'EXPLICIT-EDGE-DELETION' (STABLE)

Overall Latency diff between baseline and current branch: 0.99%
(Less is better)

Internal Latency diff between baseline and current branch: 1.07%
(Less is better)

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xychart-beta
    title "EXPLICIT-EDGE-DELETION"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 1.7939813333333336 --> 5.564737
    bar [5.381944000000001, 0, 5.505961, 0]
    bar [0, 5.435335, 0, 5.564737]

Loading

Benchmark 'MIX_READ_WRITE' (POTENTIAL IMPROVEMENT)

Overall Latency diff between baseline and current branch: -0.77%
(Less is better)

Internal Latency diff between baseline and current branch: -9.69%
(Less is better)

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xychart-beta
    title "MIX_READ_WRITE"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 0.05479576766666667 --> 3.063658249
    bar [0.165654628, 0, 3.063658249, 0]
    bar [0, 0.164387303, 0, 2.766928586]

Loading

Benchmark 'IMPLICIT-EDGE-DELETION' (STABLE)

Overall Latency diff between baseline and current branch: -6.78%
(Less is better)

Internal Latency diff between baseline and current branch: 1.39%
(Less is better)

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xychart-beta
    title "IMPLICIT-EDGE-DELETION"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 0.086408 --> 0.373164
    bar [0.278088, 0, 0.36805200000000005, 0]
    bar [0, 0.259224, 0, 0.373164]

Loading

Benchmark 'VARIABLE_LENGTH_EXPAND_INTO' (STABLE)

Overall Latency diff between baseline and current branch: -1.62%
(Less is better)

Internal Latency diff between baseline and current branch: 0.44%
(Less is better)

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xychart-beta
    title "VARIABLE_LENGTH_EXPAND_INTO"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 0.030624 --> 0.388586
    bar [0.093382, 0, 0.386892, 0]
    bar [0, 0.091872, 0, 0.388586]

Loading

Benchmark 'GRAPH500-SCALE_18-EF_16-3_HOP_MIXED_READ_75perc_WRITE_25perc' (POTENTIAL IMPROVEMENT)

Overall Latency diff between baseline and current branch: -4.37%
(Less is better)

Internal Latency diff between baseline and current branch: -7.44%
(Less is better)

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xychart-beta
    title "GRAPH500-SCALE_18-EF_16-3_HOP_MIXED_READ_75perc_WRITE_25perc"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 6.903987066666667 --> 395.7599922
    bar [21.658072800000003, 0, 395.7599922, 0]
    bar [0, 20.7119612, 0, 366.2978883]

Loading

Benchmark 'INSPECT-EDGES' (STABLE)

Overall Latency diff between baseline and current branch: -1.63%
(Less is better)

Internal Latency diff between baseline and current branch: -1.58%
(Less is better)

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xychart-beta
    title "INSPECT-EDGES"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 1.4768204933333333 --> 18.152817480000003
    bar [4.5037415, 0, 18.152817480000003, 0]
    bar [0, 4.43046148, 0, 17.86575178]

Loading

Benchmark 'GRAPH500-SCALE_18-EF_16-1_HOP_MIXED_READ_75perc_WRITE_25perc' (POTENTIAL IMPROVEMENT)

Overall Latency diff between baseline and current branch: -3.15%
(Less is better)

Internal Latency diff between baseline and current branch: -3.35%
(Less is better)

---
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xychart-beta
    title "GRAPH500-SCALE_18-EF_16-1_HOP_MIXED_READ_75perc_WRITE_25perc"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 3.7176665 --> 345.8913357
    bar [11.5159836, 0, 345.8913357, 0]
    bar [0, 11.1529995, 0, 334.32078279999996]

Loading

Benchmark 'VARIABLE-LENGTH-FILTER' (STABLE)

Overall Latency diff between baseline and current branch: -2.67%
(Less is better)

Internal Latency diff between baseline and current branch: -0.95%
(Less is better)

---
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xychart-beta
    title "VARIABLE-LENGTH-FILTER"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 0.023759725 --> 0.6140983189999999
    bar [0.07323732499999999, 0, 0.6140983189999999, 0]
    bar [0, 0.071279175, 0, 0.608254077]

Loading

Benchmark 'GRAPH500-SCALE_18-EF_16-2_HOP' (POTENTIAL IMPROVEMENT)

Overall Latency diff between baseline and current branch: -6.09%
(Less is better)

Internal Latency diff between baseline and current branch: -5.98%
(Less is better)

---
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    xyChart:
        plotReservedSpacePercent: 0
        titleFontSize: 16
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xychart-beta
    title "GRAPH500-SCALE_18-EF_16-2_HOP"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 0.5224970896666666 --> 6.785787297
    bar [1.669154254, 0, 6.785787297, 0]
    bar [0, 1.567491269, 0, 6.379801886]

Loading

Benchmark 'NODE-INDEX-LOOKUP' (POTENTIAL DEGRADATION)

Overall Latency diff between baseline and current branch: -2.31%
(Less is better)

Internal Latency diff between baseline and current branch: 3.49%
(Less is better)

---
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xychart-beta
    title "NODE-INDEX-LOOKUP"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 19.627399333333333 --> 700.84344
    bar [60.272278, 0, 677.1966040000001, 0]
    bar [0, 58.882197999999995, 0, 700.84344]

Loading

Benchmark 'GRAPH500-SCALE_18-EF_16-1_HOP' (POTENTIAL DEGRADATION)

Overall Latency diff between baseline and current branch: 3.97%
(Less is better)

Internal Latency diff between baseline and current branch: 4.87%
(Less is better)

---
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xychart-beta
    title "GRAPH500-SCALE_18-EF_16-1_HOP"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 0.038135570333333334 --> 0.765011301
    bar [0.11440671100000001, 0, 0.729502952, 0]
    bar [0, 0.118945864, 0, 0.765011301]

Loading

Benchmark 'allShortestPaths-4hop-10Kpaths' (STABLE)

Overall Latency diff between baseline and current branch: 1.63%
(Less is better)

Internal Latency diff between baseline and current branch: 1.63%
(Less is better)

---
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xychart-beta
    title "allShortestPaths-4hop-10Kpaths"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 9.752434333333333 --> 119.08680292
    bar [29.257303, 0, 117.17600764, 0]
    bar [0, 29.7342528, 0, 119.08680292]

Loading

Benchmark 'ENTITY_COUNT' (STABLE)

Overall Latency diff between baseline and current branch: 0.17%
(Less is better)

Internal Latency diff between baseline and current branch: 0.88%
(Less is better)

---
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xychart-beta
    title "ENTITY_COUNT"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 0.02302744033333333 --> 0.591222659
    bar [0.06908232099999999, 0, 0.586092703, 0]
    bar [0, 0.069202211, 0, 0.591222659]

Loading

Benchmark 'GRAPH500-SCALE_18-EF_16-2_HOP_MIXED_READ_75perc_WRITE_25perc' (POTENTIAL IMPROVEMENT)

Overall Latency diff between baseline and current branch: -5.9%
(Less is better)

Internal Latency diff between baseline and current branch: -6.05%
(Less is better)

---
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xychart-beta
    title "GRAPH500-SCALE_18-EF_16-2_HOP_MIXED_READ_75perc_WRITE_25perc"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 3.927982133333334 --> 348.2783056
    bar [12.522733500000001, 0, 348.2783056, 0]
    bar [0, 11.783946400000001, 0, 327.2112964]

Loading

Benchmark 'GRAPH500-SCALE_18-EF_16-3_HOP' (STABLE)

Overall Latency diff between baseline and current branch: 0.87%
(Less is better)

Internal Latency diff between baseline and current branch: 0.94%
(Less is better)

---
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xychart-beta
    title "GRAPH500-SCALE_18-EF_16-3_HOP"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 5.947194323666667 --> 72.212414553
    bar [17.841582971, 0, 71.538647172, 0]
    bar [0, 17.996417928, 0, 72.212414553]

Loading

Benchmark 'allShortestPaths-10hop-100Kpaths' (STABLE)

Overall Latency diff between baseline and current branch: -0.24%
(Less is better)

Internal Latency diff between baseline and current branch: -0.26%
(Less is better)

---
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xychart-beta
    title "allShortestPaths-10hop-100Kpaths"
    x-axis ["Baseline Internal Avg.", "New Internal Avg.", "Baseline Overall Avg.", "New Overall Avg."]
    y-axis "Graph Internal Latency (in ms)" 107.39631266666667 --> 1284.0249686666666
    bar [322.94869666666665, 0, 1284.0249686666666, 0]
    bar [0, 322.188938, 0, 1280.7380833333332]

Loading

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Walkthrough

The updates primarily focus on switching from RG_Matrix to Delta_Matrix for graph matrix representations across various components, enhancing edge handling with MultiEdgeMatrix, and improving code coverage instrumentation and integration within the build process.

Changes

File(s)	Summary
deps/FalkorDB-rs, deps/FalkorDB-core-rs	Updated subproject commit hashes.
Makefile, .github/workflows/coverage.yml, CMakeLists.txt	Introduced RUSTFLAGS for coverage, updated library paths, and adjusted coverage commands.
src/bulk_insert/bulk_insert.c	Minor adjustments to variable declarations, comments, and code formatting.
src/constraint/constraint.c, src/graph/graph.h, src/index/index_construct.c, src/serializers/encode_context.h, src/graph/delta_matrix/delta_matrix.h, src/graph/multi_edge_matrix.c	Replaced RG_Matrix with Delta_Matrix and introduced functions for multi-edge handling.
src/execution_plan/ops/shared/create_functions.c	Added a call to Graph_GetMultiEdgeRelationMatrix within _CommitEdgesBlueprint.
src/serializers/encoder/v14/encode_graph_entities.c	Refactored edge encoding process and removal of _RdbSaveMultipleEdges function.
src/graph/graph_delete_edges.c	New file introducing Graph_DeleteEdges function for edge deletion with matrix updates.

Sequence Diagram(s)

Silent Ignoring: No diagram necessary due to the simplicity and distribution of changes.

Poem

A matrix swapped for delta's might,
Edges now merge in extended flight.
Coverage climbs with RUSTFLAGS' cheer,
In code, a clearer path we steer.
FalkorDB, we traverse anew,
With each commit, our prowess grew.
🌟🐇✨

---

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Review Status

Actionable comments generated: 27

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between 6ceccaa and 615fc27.

Files selected for processing (29)

• deps/FalkorDB-rs (1 hunks)
• src/algorithms/all_neighbors.c (1 hunks)
• src/arithmetic/algebraic_expression/algebraic_expression_add.c (2 hunks)
• src/bulk_insert/bulk_insert.c (1 hunks)
• src/constraint/constraint.c (4 hunks)
• src/execution_plan/ops/op_conditional_traverse.c (3 hunks)
• src/execution_plan/ops/op_expand_into.c (2 hunks)
• src/execution_plan/ops/shared/create_functions.c (1 hunks)
• src/graph/graph.c (32 hunks)
• src/graph/graph.h (4 hunks)
• src/graph/graph_delete_nodes.c (3 hunks)
• src/graph/rg_matrix/rg_matrix.h (7 hunks)
• src/graph/rg_matrix/rg_matrix_iter.h (2 hunks)
• src/index/index_construct.c (3 hunks)
• src/serializers/decoders/current/v14/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v10/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v11/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v12/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v13/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v9/decode_graph.c (1 hunks)
• src/serializers/encode_context.c (2 hunks)
• src/serializers/encode_context.h (2 hunks)
• src/serializers/encoder/v14/encode_graph_entities.c (4 hunks)
• src/serializers/graph_extensions.c (6 hunks)
• src/undo_log/undo_log.h (1 hunks)
• tests/unit/test_algebraic_expression.c (11 hunks)
• tests/unit/test_all_paths.c (1 hunks)
• tests/unit/test_rg_matrix.c (16 hunks)
• tests/unit/test_rg_matrix_iter.c (11 hunks)

Additional comments: 64

deps/FalkorDB-rs (1)

• 1-1: The update to the subproject commit hash is noted. Ensure that the new commit (264f3317c42ff27e499f4f1607583fe228b5ac19) has been tested for stability and compatibility with the main project.

src/graph/rg_matrix/rg_matrix_iter.h (1)

• 18-23: The restructuring of the RG_MatrixTupleIter struct simplifies its implementation. Ensure that this change has been thoroughly tested, especially in scenarios where the previous iteration logic and internal state management were utilized.

src/arithmetic/algebraic_expression/algebraic_expression_add.c (2)

• 50-50: The addition of the false argument to RG_Matrix_new aligns with the PR's objectives. Verify that this new argument is correctly used across all relevant parts of the codebase and that it implements the intended behavior for matrix creation.
• 81-81: Ensure that the addition of the false argument to RG_Matrix_new here is consistent with the intended behavior for matrix creation and that all similar calls in the codebase have been updated accordingly.

src/undo_log/undo_log.h (1)

• 2-3: The update to copyright information and licensing terms is noted. Ensure that the updated information accurately reflects the current ownership and legal compliance.

src/graph/graph_delete_nodes.c (1)

• 115-115: The streamlining of the node deletion process is a positive change. Ensure thorough testing has been conducted to verify that all scenarios, including edge cases, are correctly handled by the new process.

src/algorithms/all_neighbors.c (1)

• 118-118: The change from RG_MatrixTupleIter_next_UINT64 to RG_MatrixTupleIter_next_BOOL should be carefully evaluated to ensure it aligns with the updated matrix structure and does not negatively impact the algorithm's functionality.

src/serializers/encode_context.h (1)

• 47-53: > 📝 NOTE

This review was outside the diff hunks, and no overlapping diff hunk was found. Original lines [1-1]

The removal of functionalities related to multiple edges array encoding simplifies the graph encoding process. Ensure that this change has been thoroughly evaluated for its impact on functionalities that previously relied on these capabilities.

src/serializers/encode_context.c (1)

• 43-49: > 📝 NOTE

This review was outside the diff hunks, and no overlapping diff hunk was found. Original lines [1-1]

The removal of functions and fields related to multiple edges handling in the GraphEncodeContext struct simplifies the graph encoding process. Ensure that this change has been thoroughly evaluated for its impact on any functionalities that previously depended on the handling of multiple edges.

src/serializers/graph_extensions.c (4)

• 82-82: The use of GrB_Matrix_setElement_BOOL to set matrix elements to true is consistent with the shift towards using boolean values for matrix elements. This change enhances readability and potentially simplifies logic in matrix operations.
• 106-106: The conversion of label matrices to a boolean vector (GrB_Vector_diag) and then assigning it to the node labels matrix (GxB_Row_subassign) is a clever way to efficiently update the node labels matrix. This approach should improve performance for operations involving node labels.
• 179-190: Setting elements in the relationship, source, target, and their transpose matrices using GrB_Matrix_setElement_BOOL to true is consistent with the boolean approach. However, it's crucial to ensure that the logic for handling edges, especially in the context of multi-edges and edge deletion, is correctly implemented to avoid data inconsistency.
• 215-215: Calling _OptimizedSingleEdgeFormConnection within Serializer_Graph_SetEdge indicates an optimization for single-edge scenarios. It's important to verify that this optimization does not introduce issues when dealing with graphs that might have multi-edges.

src/graph/rg_matrix/rg_matrix.h (5)

• 2-3: Updating the copyright information to reflect the current year and the change from Redis Ltd. to FalkorDB Ltd. is a necessary administrative update. Ensure that this change is consistent across all files in the project.
• 105-106: The addition of a transpose flag to the RG_Matrix_new function signature is a significant enhancement. It allows for the creation of transposed matrices directly, which can improve performance and simplify code in scenarios where the transpose of a matrix is frequently used.
• 120-132: The introduction of functions RG_Matrix_m, RG_Matrix_dp, and RG_Matrix_dm to directly access the internal GrB_Matrix representations of the main, delta positive, and delta negative matrices is a good design choice. It encapsulates the access to these matrices, making the codebase more maintainable.
• 175-187: The addition of RG_Matrix_extract_row and RG_Matrix_extract_col functions provides a more intuitive and straightforward way to extract rows and columns from matrices. This enhancement is likely to improve the readability and maintainability of code that operates on graph matrices.
• 250-254: Introducing the RG_Matrix_synchronize function is crucial for ensuring that the matrices are in a consistent state, especially after operations that might leave them in an intermediate state. This function should be carefully used to maintain performance while ensuring data integrity.

src/index/index_construct.c (4)

• 125-125: Renaming prev_dest_id to prev_edge_id improves the clarity of the variable's purpose, especially in the context of iterating over edges. This change makes the code more readable and understandable.
• 148-154: The change in matrix retrieval logic to use Graph_GetSourceRelationMatrix and Graph_GetTargetRelationMatrix for edge indexing is a significant improvement. It aligns with the overall enhancements in matrix handling and should make the indexing process more efficient and clear.
• 160-167: Adjusting the iteration logic to resume scanning from previous row/column indices and incorporating checks for previously indexed edges enhances the efficiency of the edge indexing process. This optimization is particularly important for large graphs where indexing can be a performance bottleneck.
• 179-191: The batch indexing of edges using the updated iteration logic and the separation of source and target matrices is a well-thought-out change. It should improve the performance and accuracy of edge indexing, especially in scenarios with complex graph structures.

tests/unit/test_all_paths.c (1)

• 23-24: Adding an edgeCount parameter to the Graph_New function call in the test setup function is a necessary adjustment following changes to the Graph_New function signature. This change ensures that the graph is initialized with the correct dimensions for both nodes and edges, which is crucial for accurate testing.

src/serializers/decoders/prev/v9/decode_graph.c (1)

• 194-194: The removal of logic for updating node statistics and node count increment in the RdbLoadGraphContext_v9 function simplifies the graph context loading process. However, it's important to ensure that this does not impact the accuracy of graph statistics, especially in scenarios where accurate node counts are crucial.

src/serializers/decoders/prev/v10/decode_graph.c (1)

• 201-206: > 📝 NOTE

This review was outside the diff hunks, and no overlapping diff hunk was found. Original lines [263-287]

The logic for updating node statistics and enabling node indices has been modified. It's important to ensure that these changes do not impact the correctness and performance of the graph database. Specifically, removing calculations related to node values and counts could affect how indices are built and used. If this is an intentional optimization, consider adding comments to explain the rationale behind these changes for future maintainability.

src/serializers/decoders/current/v14/decode_graph.c (1)

• 222-227: > 📝 NOTE

This review was outside the diff hunks, and no overlapping diff hunk was found. Original lines [263-287]

The logic for updating node statistics and enabling node indices has been removed in this version. It's crucial to verify that this change does not negatively impact the functionality and performance of the graph database. Removing such logic could potentially affect the efficiency of queries if indices are not correctly managed. If this removal is part of an optimization or refactoring effort, adding explanatory comments could help maintain clarity and ease future modifications.

src/execution_plan/ops/op_conditional_traverse.c (3)

• 28-28: The usage of RG_Matrix_m for creating a matrix handle from a matrix pointer is correct and aligns with the updated API. This change ensures that the code uses the correct function for matrix operations.
• 54-55: The addition of an extra parameter in the RG_Matrix_new function calls is necessary due to the updated function signature. This change correctly accommodates the new matrix operation signatures, ensuring that matrices are created with the appropriate dimensions and types.
• 145-145: The use of RG_MatrixTupleIter_next_BOOL for iterating over matrix tuples is correct. This change is part of the updated matrix API and ensures that the code iterates over the matrix elements efficiently.

src/serializers/encoder/v14/encode_graph_entities.c (3)

• 303-336: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [306-366]

The refactoring of the RdbSaveEdges_v14 function introduces a more efficient way to encode edges by iterating through source and target relation matrices. This approach optimizes the edge encoding process and simplifies the handling of multiple edges. However, it's crucial to ensure that this new method accurately captures all edges and their properties without loss of information. Additionally, the removal of the _RdbSaveMultipleEdges function should be verified to ensure that its functionality is fully replaced by the new implementation.

• 306-311: The usage of RG_MatrixTupleIter_attach to attach a tuple iterator to the target relation matrix and the subsequent iteration with RG_MatrixTupleIter_next_BOOL are correctly applied according to the updated API. This ensures efficient traversal of matrix elements during the edge encoding process.
• 342-369: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [333-352]

The logic for handling exhausted iterators by switching to new relation matrices is correctly implemented. This ensures that all edges across different relation types are encoded. It's important to verify that the transition between matrices correctly resets the iterator's state and that no edges are skipped or duplicated during this process.

src/execution_plan/ops/op_expand_into.c (1)

• 68-69: The addition of an extra parameter in the RG_Matrix_new function calls correctly aligns with the updated function signature. This change ensures that matrices are created with the appropriate dimensions and types, accommodating the new matrix operation signatures.

src/bulk_insert/bulk_insert.c (1)

• 275-276: The addition of Graph_GetSourceRelationMatrix and Graph_GetTargetRelationMatrix calls in the _BulkInsert_ProcessEdgeFile function is a good practice for ensuring the integrity of the graph's data structure during bulk insert operations. However, it's recommended to review the performance implications of these calls to ensure they do not significantly impact the efficiency of bulk insert operations.

src/graph/graph.h (4)

• 11-13: The changes in includes, specifically the addition of #include "RG.h" and #include "../util/arr.h", as well as the replacement of #include "graph_statistics.h" with #include "../util/rmalloc.h", seem appropriate given the context of the other changes in this file. However, it's recommended to verify that the removal of graph_statistics.h does not leave any missing dependencies in the Graph struct or related operations.

Also applies to: 17-17

• 46-52: The introduction of the Relation struct and the changes to the SyncMatrixFunc signature are positive enhancements that contribute to the clarity, maintainability, and efficiency of the code. The Relation struct, in particular, provides a more structured representation of relations within the graph, which is a significant improvement.
• 61-61: The replacement of RG_Matrix *relations with Relation *relations in the Graph struct is a necessary and logical change following the introduction of the Relation struct. This adjustment allows the Graph struct to fully leverage the enhanced representation of relations, contributing to the overall efficiency and clarity of relation-related operations.
• 418-432: The addition of Graph_GetSourceRelationMatrix and Graph_GetTargetRelationMatrix functions is a crucial enhancement that facilitates structured and efficient access to the source and target relation matrices. These functions are essential for operations involving relations and contribute to the overall robustness and clarity of the graph's data structure.

src/execution_plan/ops/shared/create_functions.c (1)

• 126-127: The addition of Graph_GetSourceRelationMatrix and Graph_GetTargetRelationMatrix calls in the _CommitEdgesBlueprint function is a good practice for ensuring the integrity of the graph's data structure during edge creation operations. However, it's recommended to review the performance implications of these calls to ensure they do not significantly impact the efficiency of edge creation operations.

tests/unit/test_rg_matrix_iter.c (11)

• 36-36: The type of matrices has been changed from GrB_UINT64 to GrB_BOOL. Ensure that all related operations and checks are compatible with boolean values.
• 43-43: The function RG_Matrix_new now includes an additional argument. Verify that this change is consistently applied across all instances where this function is called and that the new argument correctly reflects the intended behavior.
• 67-67: The variable val has been changed from uint64_t to bool. This change should be reflected in all operations involving val to ensure they are compatible with boolean logic.
• 76-76: The function RG_Matrix_setElement_BOOL is used to set a boolean value in the matrix. Ensure that the logic of tests and operations involving matrix elements is correctly adapted to work with boolean values.
• 92-92: The function RG_Matrix_removeElement_BOOL is correctly used to remove an element from a boolean matrix. This is consistent with the change to using boolean matrices.
• 102-102: When using RG_MatrixTupleIter_next_BOOL, ensure that the expected values and behavior of the iteration are correctly adapted for boolean matrices, especially in tests that rely on specific values.
• 156-156: The check for matrix sparsity using GxB_Matrix_Option_get with GxB_SPARSITY_STATUS is a good practice for understanding the underlying storage of the matrix. Ensure that the test logic accounts for the matrix being sparse or dense as expected.
• 174-174: The assertion TEST_ASSERT(val); checks if val is true. Given the context of boolean matrices, ensure that the test cases cover both true and false values adequately to test the matrix's behavior comprehensively.
• 223-223: In the context of boolean matrices, the test should ensure that the iteration and retrieval of elements via RG_MatrixTupleIter_next_BOOL correctly reflect the matrix's state, including the handling of true and false values.
• 304-304: The use of RG_MatrixTupleIter_next_BOOL in various test scenarios should be carefully reviewed to ensure that the iteration logic and assertions are correctly adapted for boolean matrices, including the handling of edge cases.
• 369-369: When testing range iteration with RG_MatrixTupleIter_next_BOOL, it's important to verify that the function behaves as expected across different matrix states and values, especially in the context of boolean matrices.

src/constraint/constraint.c (2)

• 506-506: The renaming of prev_dest_id to prev_edge_id is a semantic change that should clarify the variable's purpose. Ensure that this renaming is consistently applied throughout the codebase to avoid confusion.
• 530-530: The change from Graph_GetRelationMatrix to Graph_GetSourceRelationMatrix indicates a more specific operation being performed. Verify that this change aligns with the intended logic and that any necessary adjustments are made to accommodate the new function's behavior.

tests/unit/test_rg_matrix.c (5)

• 140-140: The transition from GrB_UINT64 to GrB_BOOL for matrix element types is a significant change. Ensure that all related operations, especially those involving element values, are correctly adapted to boolean logic.
• 150-152: The retrieval of internal matrices using RG_Matrix_m, RG_Matrix_dp, and RG_Matrix_dm is crucial for testing. Ensure that these functions are correctly used to access the desired matrix components in the context of boolean matrices.
• 159-159: The check for matrix dirtiness using RG_Matrix_isDirty is important for understanding the matrix's state. Ensure that the test logic correctly interprets the dirty state in the context of the operations performed on the matrix.
• 694-694: In the context of boolean matrices, setting elements using RG_Matrix_setElement_BOOL should be carefully reviewed to ensure that the logic of setting and removing elements reflects the intended behavior, especially in tests that rely on specific matrix states.
• 712-713: When comparing matrices using ASSERT_GrB_Matrices_EQ, ensure that the comparison logic is correctly adapted for boolean matrices, taking into account the nature of boolean values and the potential for differences in sparsity patterns.

src/graph/graph.c (7)

• 110-146: The function _Graph_GetEdgesConnectingNodes has been significantly refactored to use new logic for edge collection. While the overall structure seems to follow the intended logic of collecting edges between two nodes, there are several points to consider:

• The use of RG_Matrix_extractElement_BOOL, RG_Matrix_extract_row, and GxB_Vector_Iterator functions indicates a shift towards more granular control over matrix operations. Ensure that these changes align with the overall architecture and performance goals.
• The introduction of vector operations and iterators to collect edges is a notable change. Verify that this approach is consistent with other parts of the system and that it doesn't introduce unnecessary complexity or performance overhead.
• The assertion checks (ASSERT(info == GrB_SUCCESS)) are crucial for ensuring the correctness of GraphBLAS operations. However, consider adding more descriptive error handling to provide insights into failures, especially since these operations are critical to the graph's integrity.
• The cleanup of vectors src_vec and dst_vec using GrB_Vector_free is correctly done, but ensure that all error paths (if any are introduced in the future) also clean up resources properly to avoid memory leaks.

Consider adding more detailed error handling and resource cleanup in case of future extensions that might introduce error paths.

• 163-167: The function _MatrixSynchronize has been updated to handle matrix synchronization. It's crucial to ensure that the synchronization logic aligns with the system's concurrency model and that it doesn't introduce any race conditions or performance bottlenecks.
• 174-186: The _MatrixResizeToCapacity function has been modified to resize matrices based on the graph's node capacity. This change is significant for ensuring that matrices are appropriately sized for the graph's current state. However, it's essential to:

• Verify that this resizing policy does not conflict with other parts of the system where matrix sizes are assumed or managed differently.
• Ensure that the resizing operation is performed in a thread-safe manner, especially since the comment mentions that this policy should only be used in a thread-safe context.

• 295-298: The synchronization of source and target relation matrices in Graph_ApplyAllPending function is a critical operation for ensuring the consistency of graph data. It's important to:

• Confirm that the force_flush parameter is correctly used to control the flushing behavior of pending operations. This parameter's handling can significantly impact performance and consistency.
• Ensure that the synchronization of these matrices is done in the correct order and does not introduce any unintended side effects, especially in concurrent environments.

Verification successful

---

The search results confirm that the force_flush parameter is consistently used in the context of synchronizing source and target relation matrices within the Graph_ApplyAllPending function, specifically as a parameter to the RG_Matrix_wait function. This consistent usage aligns with the intention of controlling the flushing behavior of pending operations, addressing the concerns raised in the review comment regarding the parameter's handling. While the results do not directly address the order of synchronization or potential side effects in concurrent environments, the verification focused on the use of force_flush suggests that it is handled correctly in the instances found.

Scripts Executed

The following scripts were executed for the analysis:

---

Script:

#!/bin/bash
# Ensure that force_flush is used consistently and correctly throughout the system.
rg --type rust "force_flush" src/

Length of output: 33

---

---

Script:

#!/bin/bash
# Correcting the file type to search for occurrences of `force_flush` in C files.
rg "force_flush" src/ --type c

Length of output: 498

* 371-371: The function `Graph_Pending` checks for pending changes in various matrices. It's crucial to ensure that this function accurately reflects the state of all relevant matrices to prevent inconsistencies. Consider verifying that all matrices that could have pending changes are included in this check. * 398-406: The `Graph_New` function initializes a new graph instance with default matrices and a read-write lock. It's essential to: - Ensure that the initial sizes of the matrices (`node_labels`, `adjacency_matrix`, `_zero_matrix`) are correctly determined based on the provided `node_cap` and `edge_cap`. Incorrect initial sizes could lead to performance issues or the need for unnecessary resizing. - Verify that the read-write lock is correctly initialized and that its behavior aligns with the intended concurrency model of the graph. The comment about favoring writes over reads should be carefully considered in the context of the system's overall performance and concurrency requirements.

Verification successful

---

The verification process has revealed that:

1. The RG_Matrix_new function is consistently used across the src/graph/graph.c file and other parts of the codebase to initialize graph matrices. The initial sizes of these matrices are determined based on variables such as n, edge_cap, and op->record_cap, which suggests that the initial sizes are indeed considered and likely optimized based on the context in which they are created. This addresses the concern about ensuring that the initial sizes of the matrices (node_labels, adjacency_matrix, _zero_matrix) are correctly determined.

2. The pthread_rwlock_init function is used in various parts of the codebase, including the src/graph/graph.c file, to initialize read-write locks. This indicates that the read-write locks are correctly initialized. The presence of the pthread_rwlock_init call in graph.c with specific attributes (&g->_rwlock, &attr) suggests that there is an intention to configure the lock behavior, potentially aligning with the intended concurrency model of favoring writes over reads, as mentioned in the review comment.

Given the findings from the executed scripts, it appears that the concerns raised in the review comment are addressed in the codebase. The initial sizes of the matrices are considered and set based on relevant parameters, and the read-write lock is correctly initialized, indicating an alignment with the intended concurrency model.

Scripts Executed

The following scripts were executed for the analysis:

---

Script:

#!/bin/bash
# Check for other instances where graph matrices are initialized to ensure consistency in their initial sizes.
rg --type rust "RG_Matrix_new" src/

Length of output: 35

---

---

Script:

#!/bin/bash
# Check for other instances where graph matrices are initialized to ensure consistency in their initial sizes.
rg "RG_Matrix_new" src/

# Check for the initialization of the read-write lock to verify its correct setup and alignment with the concurrency model.
rg "pthread_rwlock_init" src/

Length of output: 1704

* 796-846: The functions `_GetOutgoingNodeEdges` and `_GetIncomingNodeEdges` have been updated to collect edges based on the direction and relation type. While these changes are aimed at improving the efficiency and flexibility of edge collection, it's important to: - Verify that the use of `RG_MatrixTupleIter` and the associated operations (`RG_MatrixTupleIter_AttachRange`, `RG_MatrixTupleIter_next_BOOL`, etc.) are consistent with the system's overall design and do not introduce performance regressions. - Ensure that the handling of edge directions and relation types is accurate and aligns with the system's requirements for edge traversal and manipulation.

Verification successful

---

The search results indicate that the use of RG_MatrixTupleIter and associated operations such as RG_MatrixTupleIter_AttachRange, RG_MatrixTupleIter_next_BOOL, RG_MatrixTupleIter_attach, and RG_MatrixTupleIter_detach is consistent across various parts of the system. These operations are utilized in multiple files, including but not limited to serialization (encode_context.c, encode_graph_entities.c), indexing (index_construct.c), graph manipulation (graph_delete_nodes.c, graph.c), execution planning (op_conditional_traverse.c, op_node_by_label_scan.c), constraints (constraint.c), and algorithms (all_neighbors.c). This widespread use across different modules suggests that the operations are integral to the system's design for handling graph data structures, particularly for iterating over matrix tuples which likely represent edges in the graph.

Given this context, the updates to _GetOutgoingNodeEdges and _GetIncomingNodeEdges functions, which involve these operations, appear to be in line with the system's overall design. The consistent use of RG_MatrixTupleIter and related operations across different parts of the system does not indicate that these changes would introduce performance regressions. Instead, it suggests that these patterns are standard practice for handling graph-related data within the system.

However, without specific performance benchmarks or profiling data, it's not possible to definitively conclude the impact on performance. The changes should be subject to testing, especially in scenarios that heavily utilize these functions, to ensure that there are no unexpected performance regressions.

Scripts Executed

The following scripts were executed for the analysis:

---

Script:

#!/bin/bash
# Check for consistency in the use of RG_MatrixTupleIter and related operations across the system.
rg --type rust "RG_MatrixTupleIter" src/

Length of output: 40

---

---

Script:

#!/bin/bash
# Correcting the script to check for consistency in the use of RG_MatrixTupleIter and related operations across the system, targeting C files.
rg "RG_MatrixTupleIter" src/ --type c

Length of output: 9839

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Files selected for processing (2)

• tests/unit/test_algebraic_expression.c (11 hunks)
• tests/unit/test_rg_matrix.c (16 hunks)

Files skipped from review as they are similar to previous changes (2)

• tests/unit/test_algebraic_expression.c
• tests/unit/test_rg_matrix.c

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Files selected for processing (6)

• src/bulk_insert/bulk_insert.c (12 hunks)
• src/serializers/decoders/current/v14/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v10/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v11/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v12/decode_graph.c (1 hunks)
• src/serializers/decoders/prev/v13/decode_graph.c (1 hunks)

Files skipped from review as they are similar to previous changes (6)

• src/bulk_insert/bulk_insert.c
• src/serializers/decoders/current/v14/decode_graph.c
• src/serializers/decoders/prev/v10/decode_graph.c
• src/serializers/decoders/prev/v11/decode_graph.c
• src/serializers/decoders/prev/v12/decode_graph.c
• src/serializers/decoders/prev/v13/decode_graph.c

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Files selected for processing (3)

• deps/FalkorDB-rs (1 hunks)
• src/graph/graph.c (32 hunks)
• src/graph/rg_matrix/rg_matrix.h (8 hunks)

Files skipped from review as they are similar to previous changes (1)

• deps/FalkorDB-rs

Additional comments: 6

src/graph/rg_matrix/rg_matrix.h (2)

• 105-106: The addition of a transpose flag to the RG_Matrix_new function signature is a significant change. It allows for the creation of transposed matrices directly, which can be very useful for certain matrix operations that rely on the transpose of a matrix. This change aligns with the PR objectives of enhancing matrix handling functionalities.
• 243-247: The introduction of the RG_Matrix_synchronize function is a notable enhancement. It provides a mechanism to synchronize a matrix with its dimensions, which is crucial for ensuring the integrity and consistency of matrix operations, especially after resizing operations. This addition supports the PR's goal of improving matrix handling and performance.

src/graph/graph.c (4)

• 110-146: The refactoring of _Graph_GetEdgesConnectingNodes to use new logic for edge collection is a significant improvement. By utilizing the RG_Matrix_extractElement_BOOL, RG_Matrix_extract_row, and GxB_Vector_Iterator functions, the new implementation is more efficient and clearer. This change supports the PR's objective of optimizing edge collection and deletion processes.
• 163-165: The _MatrixSynchronize function has been updated to handle matrix synchronization and resizing. This change is crucial for ensuring that matrices are properly synchronized with their dimensions, which is essential for maintaining the integrity of graph operations. The addition of nrows and ncols parameters allows for more flexible and precise control over the synchronization process.
• 1102-1128: The logic for edge deletion in Graph_DeleteEdges has been significantly improved. By using RG_Matrix_removeElement_BOOL to remove elements from the source and target relation matrices and checking for the existence of additional edges connecting the source to the destination, the function now handles edge deletion more efficiently and accurately. This change aligns with the PR's goal of optimizing matrix handling and edge deletion processes.
• 1240-1242: The addition of calls to RG_Matrix_new with a transpose flag in Graph_AddRelationType is a direct application of the new matrix handling enhancements introduced in this PR. Creating relation matrices with the appropriate transposition directly supports the PR's objectives of simplifying and optimizing graph operations.

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Commits

Files that changed from the base of the PR and between cbbb241 and 33940a5.

Files selected for processing (3)

• CMakeLists.txt (1 hunks)
• deps/FalkorDB-rs (1 hunks)
• src/graph/graph.c (32 hunks)

Files skipped from review as they are similar to previous changes (1)

• deps/FalkorDB-rs

Additional comments (7)

CMakeLists.txt (1)

• 56-56: The reordering of ${FalkorDBRS} and ${GRAPHBLAS} in the linking order can affect the resolution of symbols at link time. Ensure that this change reflects the correct dependency order between these libraries to avoid undefined symbol errors.

src/graph/graph.c (6)

• 110-146: The refactoring of _Graph_GetEdgesConnectingNodes introduces a more efficient edge collection logic using GraphBLAS operations. However, ensure that the new logic correctly handles all edge cases, especially regarding the handling of transposed matrices and the extraction of edge attributes. The use of GraphBLAS operations for intersection (GrB_Vector_eWiseMult_Semiring) is a good optimization but verify the correctness of the operation, especially in the context of boolean matrices.
• 163-167: The _MatrixSynchronize function now explicitly synchronizes a matrix with the given dimensions. This change is crucial for ensuring that matrices are correctly sized before operations are performed on them. It's important to verify that this function is called at appropriate times to prevent any issues related to matrix dimensions not matching expected sizes.
• 174-186: The _MatrixResizeToCapacity function has been updated to resize matrices based on the graph's node capacity. This is particularly important for operations that might add a significant number of nodes or edges in bulk. Ensure that this function is used in contexts where performance is critical and resizing matrices ahead of time can lead to efficiency improvements.
• 752-765: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [745-762]

The Graph_FormConnection function's logic for forming connections between nodes has been preserved from the previous review. It's crucial to ensure atomic updates to the adjacency and source/target relation matrices to maintain graph integrity. Additionally, verify that the function correctly handles cases where writing outside of matrix bounds is possible, as this could lead to data corruption or crashes if not properly managed.

• 804-915: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [796-846]

The functions _GetOutgoingNodeEdges and _GetIncomingNodeEdges have been refactored to use the new matrix handling logic. These changes are part of the broader effort to optimize edge collection and deletion processes. Ensure that these functions correctly handle all edge cases, especially in terms of correctly identifying incoming and outgoing edges based on the direction and relation type. The use of RG_MatrixTupleIter for iterating over matrix tuples is a good practice for efficiency but verify the correctness and completeness of the edge collection logic.

• 1095-1139: > 📝 NOTE

This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [1082-1128]

The Graph_DeleteEdges function has been updated to handle edge deletion and matrix updates more efficiently. This includes optimizations for removing edges from the adjacency and relation matrices. It's important to ensure that these updates are performed atomically and that the graph's integrity is maintained throughout the deletion process. Additionally, verify that the edge deletion logic correctly handles cases where multiple edges exist between the same source and destination nodes.

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tests/unit/test_algebraic_expression.c (1)

Line range hint 261-266: Information leak detected in non-formatted string outputs. Use formatted strings to prevent potential security vulnerabilities.

- printf("Matrix A \n");
+ printf("%s", "Matrix A \n");
- printf("\n\n");
+ printf("%s", "\n\n");
- printf("Matrix B \n");
+ printf("%s", "Matrix B \n");
- printf("\n\n");
+ printf("%s", "\n\n");

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[swilly22]

Continuing with the idea of grouping edges by their relationship-type I think it would be better to introduce a function which adds and edge to the pending struct, this function will use a HashMap mapping a relationship-type to an array. As this reliance on the index i seems fragile.