CQEngine vs fexpr

CQEngine

Ultra-fast SQL-like queries on Java collections (by npgall)

fexpr

Simple filter query language parser so that you can build SQL, Elasticsearch, etc. queries safely from user input. (by ganigeorgiev)

Query Parser DSL filter-parser

Source Code

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CQEngine		fexpr
	Project
6	Mentions	1
1,678	Stars	83
-	Growth	-
0.0	Activity	4.4
4 months ago	Latest Commit	5 months ago
Java	Language	Go
Apache License 2.0	License	BSD 3-clause "New" or "Revised" License

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

CQEngine

Posts with mentions or reviews of CQEngine. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-05-18.

What is the weirdest or most interesting piece of code you ever had to write?
1 project | /r/developersIndia | 9 Jul 2023

Wrote the code to convert CQEngineCQEngine queries into Solr search queries.
Looking for: library to turn SQL (or abstracted) to code & execute against custom backend (slice of structs)
5 projects | /r/golang | 18 May 2022

It seems that you're looking for something like https://github.com/npgall/cqengine but unfortunately I'm not aware of any equivalent in Go. LINQ is similar. I'd probably try searching for "LINQ in go" or something like that.
Evaluating Range Predicates over Java collections
2 projects | /r/java | 13 Mar 2022

I wonder if there's a huge difference in efficiency between RoaringBitmap and CQEngine. I used CQEngine a few years back and it turned out really great. Never tried RoaringBitmap, though.
CQEngine for Java Tutorials/ Guides / Books?
1 project | /r/javahelp | 5 Jul 2021
Ideal Datastructure for Multiple Keys mapping to Multiple Values?
1 project | /r/javahelp | 5 Jul 2021
Early stage draft: Functional transformation of immutable objects
2 projects | /r/java | 5 Apr 2021

fexpr

Posts with mentions or reviews of fexpr. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-05-18.

Looking for: library to turn SQL (or abstracted) to code & execute against custom backend (slice of structs)
5 projects | /r/golang | 18 May 2022

If you are looking for a generic filter/query parser, I've recently come across this one - https://github.com/ganigeorgiev/fexpr (its not sql, but its syntax looks similar).

What are some alternatives?

When comparing CQEngine and fexpr you can also consider the following projects:

Lanterna - Java library for creating text-based GUIs

Modern Java - A Guide to Java 8 - Modern Java - A Guide to Java 8

OpenRefine - OpenRefine is a free, open source power tool for working with messy data and improving it

Design Patterns - Design patterns implemented in Java

jabba - (cross-platform) Java Version Manager

Smooks - Extensible data integration Java framework for building XML and non-XML fragment-based applications

Codename One - Cross-platform framework for building truly native mobile apps with Java or Kotlin. Write Once Run Anywhere support for iOS, Android, Desktop & Web.

J2ObjC - A Java to iOS Objective-C translation tool and runtime.

Jimfs - An in-memory file system for Java 7+

RoaringBitmap - A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others

Maven Wrapper - The easiest way to integrate Maven into your project!

FF4J - Feature Flags for Java made easy