if (statement.isMultiple()) {
ValidationErrors validationErrors = new ValidationErrors();
AddColumnStatement firstColumn = statement.getColumns().get(0);
for (AddColumnStatement column : statement.getColumns()) {
validationErrors.addAll(validateSingleColumn(column, database));
if (firstColumn.getTableName() != null && !firstColumn.getTableName().equals(column.getTableName())) {
validationErrors.addError("All columns must be targeted at the same table");
}
if (column.isMultiple()) {
validationErrors.addError("Nested multiple add column statements are not supported");