App Building/Workflow/Nodes
Dataset search Merge
FastGPT Dataset search Merge node overview

What It Does
Merges search results from multiple Datasets into a single output, re-ranks them using RRF (Reciprocal Rank Fusion), and supports max token filtering.
Usage
The AI Chat node can only accept one Dataset citation input. If you call multiple Datasets, you cannot directly cite all of them (as shown below).

Connect each Dataset search output to Dataset search Merge, then connect the merged citation output to the AI Chat node. Set the maximum token limit to control the amount of merged content.

Example Use Cases
- After question classification, search different Datasets per category, then feed the merged results to a single AI Chat node. This avoids adding a separate AI Chat node to each branch.
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