如何使用go在PostgreSQL中传递条件参数？

I'm stuck over to pass argument to the Exec function on the basis of some conditions. I googled for this but found the solution with MySQL to use args := []interface{}{var1, var2, ... varN}.

But my problem with PostgreSQL below is my conditional query:

strQry := `UPDATE core_channel SET title = $1, description = $2, `

if updateChannelReq.FeaturedVideo != 0 {
    strQry += `default_video_id = $3, `
}

strQry += ` original_keywords = $4, banner_link = $5 WHERE create_user_id = $6`

And here how I'm passing argument to execute this query:

args := []interface{}{
        updateChannelReq.Title,
        updateChannelReq.Description,
    }

if updateChannelReq.FeaturedVideo != 0 {
    args = append(args, updateChannelReq.FeaturedVideo)
}

args = []interface{}{
    updateChannelReq.OriginalKeyWords,
    updateChannelReq.BannerLink,
    AuthUserID,
}

_, err = stmt.Exec(args...)

But I'm getting the error:

pq: could not determine data type of parameter $3

please help me that how to manage these things. Thanks.

Change the condition by using else condition to skip the third column when creating query string.

strQry := `UPDATE core_channel SET title = $1, description = $2, `

if updateChannelReq.FeaturedVideo != 0 {
    strQry += `default_video_id = $3, original_keywords = $4, banner_link = $5 WHERE create_user_id = $6 `
} else {
    strQry += ` original_keywords = $3, banner_link = $4 WHERE create_user_id = $5`
}