feat(update): implement SPARQL 1.1 Update execution engine - #591
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- Implement parser and AST for MODIFY requests and quad templates - Introduce NextSparqlUpdateExecutor supporting all SPARQL 1.1 Update operations - Ensure snapshot isolation to prevent Halloween problem during MODIFY execution - Add UpdateTransaction with request-level commit/rollback and SILENT savepoints - Add optimistic snapshot isolation and transaction support in MemoryStorageManager - Integrate update execution with RepositoryConnection auto-commit and active transactions - Add comprehensive test coverage in CoreseUpdateExecutionTest and MemoryTransactionManagerTest Closes #567
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Closes #567
Summary
INSERT DATA,DELETE DATA,DELETE WHERE,MODIFY,CREATE,CLEAR,DROP,ADD,COPY,MOVE,LOAD).MODIFYrequests (ModifyRequestAst) and quad templates with validation (UpdateTemplateValidator,ModifyUpdateAstListener,SparqlQuadTemplateBuilder).NextSparqlUpdateExecutororchestrating update requests, re-usingNextSparqlPipelineExecutorforWHEREpattern evaluation.SILENToperations viaUpdateTransaction.MemoryStorageManager(MemoryTransactionManager,InMemoryStatementStoreversioned snapshots).CoreseRepositoryConnection(auto-commit and caller-managed transactions).