feat: implement ISO-GQL SAME predicate for element identity compariso… #692
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apache#368) Implement the ISO-GQL SAME predicate function to check if graph elements refer to the same entity by comparing their identities. This feature adds full ISO/IEC 39075:2024 Section 19.12 compliance for identity comparisons. Changes: - Parser Layer: * Add SqlSameCall AST node for SAME function calls * Add SqlSameOperator with BOOLEAN return type and VARIADIC operands * Register operator in BuildInSqlOperatorTable * Add syntax tests with 4 GQL test cases - Runtime Layer: * Implement GeaFlowBuiltinFunctions.same() for identity comparison - Vertex comparison: compares vertex IDs using Objects.equals() - Edge comparison: compares both source and target IDs - Null handling: returns null following SQL ternary logic - Type safety: returns false for mismatched types * Add BuildInExpression.SAME constant for expression translation * Register SAME in ExpressionTranslator.processOtherTrans() - Testing: * Add comprehensive SameTest with 13 unit tests (100% pass rate) * Test coverage: identical/different IDs, null handling, mixed types, string IDs, invalid types Implementation follows Approach 1 (Built-in Function Pattern) with minimal code changes (441 lines added across 9 files) for maximum simplicity and maintainability. Example usage: MATCH (a)->(b)->(c) WHERE SAME(a, c) RETURN a, b, c;
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@Loognqiang PTAL |
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…n (#368)
Implement the ISO-GQL SAME predicate function to check if graph elements refer to the same entity by comparing their identities. This feature adds full ISO/IEC 39075:2024 Section 19.12 compliance for identity comparisons.
Changes:
Parser Layer:
Runtime Layer:
Testing:
Implementation follows Approach 1 (Built-in Function Pattern) with minimal code changes (441 lines added across 9 files) for maximum simplicity and maintainability.
Example usage:
MATCH (a)->(b)->(c) WHERE SAME(a, c) RETURN a, b, c;
What changes were proposed in this pull request?
How was this PR tested?