82a5edc9b7
Introduces migration 208 to add indexes on 'callsign' and 'lastupload' columns in the lotw_users table for improved query performance. Updates migration version to 208.
38 行
1.5 KiB
PHP
38 行
1.5 KiB
PHP
<?php
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defined('BASEPATH') or exit('No direct script access allowed');
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class Migration_add_indexes_lotw_users extends CI_Migration
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{
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public function up()
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{
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if ($this->db->table_exists('lotw_users')) {
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// add an index on callsign if no index exists on that column
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$callsignIndex = $this->db->query("SHOW INDEX FROM lotw_users WHERE Column_name = 'callsign'");
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if ($callsignIndex->num_rows() == 0) {
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$this->db->query("ALTER TABLE lotw_users ADD INDEX `callsign` (`callsign`)");
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}
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// add an index on lastupload if it doesn't exist
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$lastuploadIndex = $this->db->query("SHOW INDEX FROM lotw_users WHERE Column_name = 'lastupload'");
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if ($lastuploadIndex->num_rows() == 0) {
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$this->db->query("ALTER TABLE lotw_users ADD INDEX `lastupload` (`lastupload`)");
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}
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}
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}
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public function down()
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{
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if ($this->db->table_exists('lotw_users')) {
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// drop the indexes we might have created (only if the index name matches)
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$li = $this->db->query("SHOW INDEX FROM lotw_users WHERE Key_name = 'lastupload'");
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if ($li->num_rows() > 0) {
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$this->db->query("ALTER TABLE lotw_users DROP INDEX `lastupload`");
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}
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$ci = $this->db->query("SHOW INDEX FROM lotw_users WHERE Key_name = 'callsign'");
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if ($ci->num_rows() > 0) {
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$this->db->query("ALTER TABLE lotw_users DROP INDEX `callsign`");
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}
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}
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}
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}
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