topic Re: Null columns not coming in the Record.getSchema() when creating a dynamic Custom component for talend in Talend Studio

Null columns not coming in the Record.getSchema() when creating a dynamic Custom component for talend

Samridhi — Fri, 02 Jan 2026 14:45:42 GMT

I am trying to create a custom component that will accept dynamic schema inputs and create the extract in a particular format. But when doing getSchema using Record Interface its not returning columns with null values and 1 or 2 columns are coming twice. So for each row i am getting different no of columns in the getSchema method.

@ElementListener
    public void onNext(
            @Input final Record defaultInput,
            @Output final OutputEmitter<Record> defaultOutput) {
        // this is the method allowing you to handle the input(s) and emit the output(s)
        // after some custom logic you put here, to send a value to next element you can use an
        // output parameter and call emit(value).
        System.out.println(defaultInput.getSchema());

Re: Null columns not coming in the Record.getSchema() when creating a dynamic Custom component for talend

Anonymous — Tue, 19 May 2020 23:15:31 GMT

Hi,

I am also facing the same issue. I am also looking for a method to have column names populated just once, and call a method to do something after all rows of data are retrieved.

Any help would be appreciated.

Thanks

Re: Null columns not coming in the Record.getSchema() when creating a dynamic Custom component for talend

Samridhi — Mon, 27 Jul 2020 19:38:13 GMT

Can anyone please help on this issue