Drupal 7 - 使用db_select不区分大小写LIKE

Question

I can't get a query to be case-insensitive using MySQL and Drupal 7. Here's my module code:

$results = db_select('people_table', 'p')->fields('p');
if (array_key_exists('department', $_GET)) {
    $results->condition('Department', '%' . db_like($_GET['department']) . '%', 'LIKE');
}
return $results->orderBy('Name', 'ASC')->execute();

With ?department=Chemistry in the URL, I get three results. With ?department=chemistry in the URL, I get no results. When I try $results->condition('UPPER(Department)'... , I get this error:

PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'UPPERDepartment' in 'where clause': SELECT p.* FROM {people_table} p WHERE (UPPERDepartment LIKE :db_condition_placeholder_0 ESCAPE '\\\\') ORDER BY Name ASC;

So it looks like it eats my parentheses. How can I do a case-insensitive LIKE ?

Edit: the collation on the Department column as well as on the whole table is utf8_bin . This answer says "The only special one is utf8_bin which is for comparing characters in binary format." I don't know why this collation was chosen, since all the data in the table is English text. I might just change the collation to utf8_general_ci .

Answer 1

什么是Department字段的排序规则？，对于ex utf8_unicode_ci，它应该是前缀* _ci（不区分大小写）

Answer 2

您可以使用where方法添加自定义WHERE子句，而不是使用condition ：

$results->where('UPPER(Department)'...