Xiaokang Yang

I noticed that some interfaces in the Java code are not fully aligned with those in the C++ code. For example, the [Java code](https://github.com/apache/incubator-graphar/blob/main/maven-projects/java/src/main/java/org/apache/graphar/graphinfo/VertexInfo.java) is missing the `vertexInfo::getPropertyGroupByIndex` interface, which...

> > I noticed that some interfaces in the Java code are not fully aligned with those in the C++ code. For example, the [Java code](https://github.com/apache/incubator-graphar/blob/main/maven-projects/java/src/main/java/org/apache/graphar/graphinfo/VertexInfo.java) is missing the `vertexInfo::getPropertyGroupByIndex`...

While writing unit tests, I found three issues: 1. Extra `/` in path concatenation(e.g. `"vertex/person//id/"`) (minor). 2. Missing `getVersion()` in GraphInfo, VertexInfo, and EdgeInfo (may affect usage). 3. Parameter order...

(1) and (2). aren’t urgent. I’ll open an issue to fix (3).

Hi @Jarvx200, Thank you for your interest in graphar, please refer to [CONTRIBUTING.md](https://github.com/apache/incubator-graphar/blob/main/CONTRIBUTING.md)

> Hi [@Jarvx200](https://github.com/Jarvx200) , the EdgeInfo is just an example, here are all class that need builder: Hi @Jarvx200 ,the PR for edgeInfo has been merged, Could you do this...

Your point and blog are insightful and interesting! @adsharma GraphAr enables graph data to flow across different systems (graph databases and analysis systems), so its metadata is designed to record...

I think DDL is worth discussing, maybe we can start an issue to discuss it, or I can start an official discussion on a mailing list @adsharma @SemyonSinchenko

>The higher order bit is to use SQL catalog (not necessarily duckdb, it supports postgres and mysql as well) for metadata instead of json/yaml. Within a single system, using a...

Hi @adsharma, I noticed that you submitted the PR https://github.com/LadybugDB/ladybug/pull/3 stored in parquet files in ladybugDB. I haven't read the specific implementation yet, and I'm thinking if this is compatible...