When trying to perform queries on

The community members are discussing different approaches to performing queries on multiple indices. Some suggest using a SubQuestionQueryEngine and QueryEngineTool for each index, while others recommend creating a Composable Graph Index with all the indices. The discussion highlights that the SubQuestionQueryEngine and RouterQuery engine may not work well with open-source models, and they are considered outdated and unmaintained. The community members suggest using an embedding router, which is more stable, and associating an embedding with each index to implement a search of those embeddings to retrieve the index.