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App Building/Workflow/Nodes

Dataset search Merge

FastGPT Dataset search Merge node overview

Dataset search Merge node configuration

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).

Multiple Dataset search results feeding a single AI Chat node

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.

Merged Dataset citations connected to AI Chat

Example Use Cases

  1. 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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