4 papers
Cross-Layer Decision Timing Orchestration in Cost-Based Database Systems: Resolving Structural Temporal Misalignment
Ilsun Chang
This paper analyzes execution instability in traditional cost-based database management systems (DBMS) and identifies a structural timing misalignment between optimization and exec…
Premature Dimensional Collapse and Tensor-based Execution Paths for High-Dimensional Relational Operations in Cost-Based Database Systems
Il-Sun Chang
Modern cost-based DBMSs frequently exhibit execution instability and tail-latency amplification when high-dimensional relational operations trigger memory-regime transitions such a…
Risk-Aware GPU-Assisted Cardinality Estimation for Cost-Based Query Optimizers
Ilsun Chang
Cardinality estimation is a cornerstone of cost-based optimizers (CBOs), yet real-world workloads often violate the assumptions behind static statistics, degrading decision stabili…
GPU-Augmented OLAP Execution Engine: GPU Offloading
Ilsun Chang
Modern OLAP systems have mitigated I/O bottlenecks via storage-compute separation and columnar layouts, but CPU costs in the execution layer (especially Top-K selection and join pr…