unable to get results from postgres in nodejs if callled from nested function

I have DB class which has public static query method. There can be multiple connection pools saved in _coonection_pools so I am creating a random number then get the pool and execute the query . this is the code

static async query(queryInfo: Query): Promise<any> {
    const query = `select * from ${queryInfo.name} ${queryInfo.arguments} as info;`;
    try {
        return this._queryReplicaDB(queryInfo);
    } catch (err) {
        console.log("err", err);
        throw err;
    }
}

static async _queryReplicaDB(query: Query): Promise<any> {
    const randomNumber = Math.floor(Math.random() * this._connection_pools.length);
    
    // get the pool using random number
    const pool = this._connection_pools[randomNumber];

    try {
        const response = await pool.query(query);
        return response.rows[0].info;
    } catch {
        let response;
        // if replica db fails then try with other pools
        for (let i = 0; i < this._connection_pools.length; i++) {
            // iterrate through every pool
            const pool = this._connection_pools[i];
            try {
                response = await pool.query(query);
                break;
            } catch {
                console.log("Error in Pool index: ", i);
            }
        }

        return response.rows[0].info;
    }
}

This is return empty rows in the response array

but if instead of calling nested _queryReplicaDB object this works fine

static async query(queryInfo: Query): Promise<any> {
    const query = `select * from ${queryInfo.name} ${queryInfo.arguments} as info;`;
    try {
        const response = await this._connection_pools[0].query(query);
        return response.rows[0].info;
    } catch (err) {
        console.log("err", err);
        throw err;
    }   
}

i have tried this._connection_pools[0] in the _queryReplicaDB as well but this does not work.

I tried random number thing directlty in the query method in this method this works.

what can be the issue?

In my case code was correct, its just I was passing the wrong object type. Instead of passing Query object

static async _queryReplicaDB(query: Query): Promise<any> {

this function should accept string type as the query

static async _queryReplicaDB(query: string): Promise<any> {