Function flattenRowValue

backend/api/mcp/tool_query.go:259–270

flattenRowValue extracts a plain Go value from a protojson RowValue oneof. Each value is a JSON object with exactly one key like {"stringValue": "x"}.

(raw json.RawMessage)

// flattenRowValue extracts a plain Go value from a protojson RowValue oneof.
// Each value is a JSON object with exactly one key like {"stringValue": "x"}.
func flattenRowValue(raw json.RawMessage) any {
	var m map[string]json.RawMessage
	if json.Unmarshal(raw, &m) != nil {
		return string(raw)
	}
	for key, val := range m {
		if v, ok := unmarshalRowField(key, val); ok {
			return v
		}
	}
	return string(raw)
}

// unmarshalRowField decodes a single protojson RowValue oneof field.
func unmarshalRowField(key string, val json.RawMessage) (any, bool) {