query-engine

A full RDBMS built as a fun experiment. Status: pre-alpha, Next goal successfully run full TPC-C suite

基于 Trino 418 的达梦数据库(DM8)连接器发行版

Crawler based search engine that demonstrates the main features of a search engine (web crawling, indexing and ranking) and the interaction between them.

Boolean Query engine based on Postings Lists implementing term-at-a-time and document-at-a-time query processing.

A GUI-enabled DBLP query engine application written in Java, Swing

An application that allows users to upload, process, and query files in various formats (CSV, JSON, XML)

A mini query engine built on top of an LSM-Tree storage engine, supporting durable PUT/GET/DELETE operations using MemTable, disk persistence, tombstones, and Write-Ahead Logging (WAL).

In-memory relational query engine built on the Volcano/iterator model. SQL parsing, query planning and optimisation in Java.

An advanced form of the previously implemented search Engine which acts as a information retrieval system over the cranfield collection of the 1400 documents and also makes use of the stemmer algorithm. Other things are pretty much the same as the previously implemented SearchEngine project.

Project for Information Retrieval - CMSC 676

This application is a proof of concept. I have always wondered how data mining could be done with Java without the direct use of an API. I also wanted to learn more about MongoDB, and NoSQL, as well. This application takes a ticker symbol from the user and scrapes some data from the following URL, like so: http://finance.yahoo.com/quote/${ticker…

Schema-aware NL2SQL assistant for PostgreSQL with SSE streaming, query reuse, feedback scoring, and Ollama-based answer generation.

OMQ: An IoT data stream query engine on oneM2M-based middleware

An Incomplete DataFusion Query Engine implemeted in Java

A Relational Algebra engine you can embed in a Java program

This is a database query evaluator project as part of my university of edinburgh coursework.

A containerized distributed data processing system that demonstrates core cloud database concepts through hands-on implementation using Java, Apache Arrow, Iceberg, and Calcite

Query Engine in Java with Vectorized and Data Driven Code Generation and Arrow & Parquet support