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Of course add mig, too

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int2001
2024-05-24 06:51:42 +00:00
parent 00040396bc
commit ae70b9181e
1 changed files with 33 additions and 0 deletions
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33
application/migrations/203_contest_idx.php Normal file
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<?php
defined('BASEPATH') or exit('No direct script access allowed');
// Add index for table to speedup LBA
class Migration_contest_idx extends CI_Migration {
public function up() {
$this->add_ix('contest','idx_contest_adifname','`adifname`');
}
public function down() {
$this->rm_ix('contest','idx_contest_adifname');
}
private function add_ix($table_name,$index,$cols) {
$ix_exist = $this->db->query("SHOW INDEX FROM ".$table_name." WHERE Key_name = '".$index."'")->num_rows();
if ($ix_exist == 0) {
$sql = "ALTER TABLE ".$table_name." ADD INDEX `".$index."` (".$cols.");";
$this->db->query($sql);
}
}
private function rm_ix($table_name,$index) {
$ix_exist = $this->db->query("SHOW INDEX FROM ".$table_name." WHERE Key_name = '".$index."'")->num_rows();
if ($ix_exist >= 1) {
$sql = "ALTER TABLE ".$table_name." DROP INDEX `".$index."`;";
$this->db->query($sql);
}
}
}