for (int i = 0; i < replace.getColumns().size(); i++) {
Column column = (Column) replace.getColumns().get(i);
buffer.append(column.getWholeColumnName() + "=");
Expression expression = (Expression) replace.getExpressions().get(i);
expression.accept(expressionVisitor);
if (i < replace.getColumns().size() - 1) {
buffer.append(", ");
}
}