internal static IDbCommand InsertIntoSelectInternal <T>(this IDbCommand dbCmd, ISqlExpression query, Action <IDbCommand> commandFilter)
{
var dialectProvider = dbCmd.GetDialectProvider();
var sql = query.ToSelectStatement();
var selectFields = query.GetUntypedSqlExpression()
.SelectExpression
.Substring("SELECT ".Length)
.ParseCommands();
var fieldsOrAliases = selectFields
.Map(x => x.Original.ToString().LastRightPart(" AS ").Trim().StripDbQuotes());
dialectProvider.PrepareParameterizedInsertStatement <T>(dbCmd, insertFields: fieldsOrAliases);
dbCmd.SetParameters(query.Params);
dbCmd.CommandText = dbCmd.CommandText.LeftPart(")") + ")\n" + sql;
commandFilter?.Invoke(dbCmd); //dbCmd.OnConflictInsert() needs to be applied before last insert id
return(dbCmd);
}