6 个仓库
Techniques for fusing filters and projections into join operations to avoid materializing intermediate results.
Distinct from Join Operations: Distinct from Join Operations: focuses on the optimization of the join execution pipeline rather than the join capability itself.
Explore 6 awesome GitHub repositories matching data & databases · Join Execution Optimizers. Refine with filters or upvote what's useful.
Pinot is a distributed, columnar analytical database designed for high-concurrency, low-latency query processing. It functions as a real-time OLAP datastore, enabling interactive, user-facing analytics by ingesting and querying massive datasets from both streaming and batch sources. The system architecture relies on a centralized controller for cluster coordination and a distributed segment-based storage model to ensure horizontal scalability. The platform distinguishes itself through a hybrid ingestion pipeline that unifies real-time event streams and historical batch data into a single quer
Fuses filters, projections, and limits into join operations to avoid materializing intermediate results, reducing memory usage and increasing speed.
该项目是一个全面的技术面试准备指南和计算机科学知识库。它作为一个结构化的学习资源,旨在帮助软件工程师复习核心工程概念并准备专业编码评估。 该仓库专注于广泛的理论和实践领域,包括移动应用架构和操作系统基础的详细参考。它提供了关于软件架构模式和网络协议分析的精选材料,以支持职业发展。 该内容涵盖了基础能力,如数据结构与算法、并发与多线程以及内存管理。它还深入探讨了系统架构,包括进程调度、进程间通信和 UI 渲染优化。
Discusses optimizing the join execution pipeline to accelerate linking related data across tables.
Zombodb 是一个将 PostgreSQL 与 Elasticsearch 集成的数据库扩展和关系数据索引器。它提供了一个 SQL 搜索接口,允许用户使用标准 SQL 函数和语法(而非原生 JSON API)执行复杂的搜索查询和聚合。该项目将关系数据从 PostgreSQL 同步到远程搜索引擎,以实现高性能的全文本搜索和分析。 该系统通过将关系结构与搜索引擎能力桥接而脱颖而出,特别是通过针对几何和地理类型的地理空间搜索集成。它实现了一个 SQL 转 JSON 的查询映射层,支持在关系环境中直接进行高级文本分析,包括模糊匹配、邻近搜索和相关性评分。 该项目涵盖了广泛的能力领域,包括索引生命周期管理、自动化关系数据同步和复杂的分析聚合。它支持用于基于位置查询的空间索引、自定义文本分析管道,以及用于审计索引统计和集群健康的监控工具。安全性通过使用 TLS 在数据库和搜索引擎之间进行加密连接来处理。
Improves performance for complex queries spanning multiple indices via coordination with a search accelerator.
该项目是一个针对 R 的高性能表格数据处理框架,旨在以内存效率和速度处理海量数据集。它提供了一种增强的数据结构,利用引用语义和就地修改来执行复杂的转换,而无需不必要的对象复制开销。 该库凭借其底层架构优化脱颖而出,包括多线程并行处理、基数排序和内存映射文件解析。通过将关键的数据操作和聚合例程卸载到编译后的 C 代码,它实现了对原本计算昂贵的任务的快速执行。其核心引擎支持高级关系操作,如非等值连接、滚动连接和重叠区间连接,以及用于加速重复数据访问的自动二级索引。 除了主要的处理功能外,该项目还提供了一套全面的数据生命周期管理工具。这包括具有自动类型检测的高速摄取和序列化工具,以及对时间序列分析和多维聚合的专门支持。该框架旨在实现可扩展性,允许用户在包含数十亿行的数据集上执行复杂的分组、过滤和重塑操作,同时保持系统稳定性和性能。
Blocks joins that would result in an explosive number of rows to protect system memory.
This project is a PHP SQL REST API generator and database API wrapper that automatically transforms SQL database tables into a functional web interface. It serves as a lightweight layer that maps HTTP methods to SQL commands, allowing for the creation, reading, updating, and deletion of records without writing manual endpoint code. The tool distinguishes itself by providing a dedicated spatial data API gateway for querying and exporting geometry columns using GeoJSON and WKT standards. It also functions as a multi-tenant data API, capable of isolating records for different users through share
Limits join depth and page counts in list operations to protect against automated data extraction.
Fast-paginate is a database utility designed to optimize pagination performance in PHP and Laravel applications. It functions as a transparent layer that intercepts standard query builders to replace default pagination logic with more efficient retrieval strategies, specifically targeting large-scale datasets where traditional offset and limit operations can become resource-intensive. The library distinguishes itself by implementing deferred join techniques, which retrieve only primary keys in an initial subquery before fetching full records to minimize data scanning. It further improves resp
Implements deferred join techniques to retrieve only primary keys in an initial subquery, significantly reducing data scanning and database load.