exception encountered Values [well100] cannot be coerced to []

[ooxaam]

Hi,
I'm using this function with postgres vertex reactive client. vertx-pg-client.

I'm trying to call this function with parameter but I get cannot be coerced to [] exception,

Can you guide me how can I resolve this issue.

public Completable testStreamWideTagHistoryv1(HistoryReqModel req) {
        logger.info("doing stream wide tag query");

        return txBegin()
                .flatMapCompletable(tx -> 
                    tx.rxPreparedQuery(
                        "select colpivot('test_output', 'select rt.v as agg_v, rt.t as bucket, rt.tag_id as tagged from rtdata rt where rt.asset_name = $1 ' "
                                + ", array['bucket'], array['tagged'], '#.agg_v', null)",
                        Tuple.of(req.getAssetName()))
                    .flatMapCompletable(result -> tx.rxCommit()));
    }