50 行
2.1 KiB
PHP
50 行
2.1 KiB
PHP
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<?php
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defined('BASEPATH') OR exit('No direct script access allowed');
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class Migration_add_workable_dxcc_indexes extends CI_Migration {
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public function up()
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{
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// Add composite index for workable DXCC queries
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// This will greatly improve performance for COL_COUNTRY + station_id + COL_PROP_MODE queries
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$this->db->db_debug = false;
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// Check if index already exists
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$index_exists = $this->db->query("SHOW INDEX FROM ".$this->config->item('table_name')." WHERE Key_name = 'idx_workable_dxcc'")->num_rows();
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if ($index_exists == 0) {
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$sql = "ALTER TABLE ".$this->config->item('table_name')." ADD INDEX `idx_workable_dxcc` (`COL_COUNTRY`, `station_id`, `COL_PROP_MODE`)";
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$this->db->query($sql);
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}
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// Add index for confirmation status columns
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$conf_index_exists = $this->db->query("SHOW INDEX FROM ".$this->config->item('table_name')." WHERE Key_name = 'idx_qsl_confirmations'")->num_rows();
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if ($conf_index_exists == 0) {
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$sql = "ALTER TABLE ".$this->config->item('table_name')." ADD INDEX `idx_qsl_confirmations` (`COL_QSL_RCVD`, `COL_LOTW_QSL_RCVD`, `COL_EQSL_QSL_RCVD`, `COL_QRZCOM_QSO_DOWNLOAD_STATUS`)";
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$this->db->query($sql);
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}
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$this->db->db_debug = true;
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}
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public function down()
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{
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$this->db->db_debug = false;
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// Drop the indexes if they exist
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$index_exists = $this->db->query("SHOW INDEX FROM ".$this->config->item('table_name')." WHERE Key_name = 'idx_workable_dxcc'")->num_rows();
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if ($index_exists > 0) {
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$this->db->query("ALTER TABLE ".$this->config->item('table_name')." DROP INDEX `idx_workable_dxcc`");
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}
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$conf_index_exists = $this->db->query("SHOW INDEX FROM ".$this->config->item('table_name')." WHERE Key_name = 'idx_qsl_confirmations'")->num_rows();
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if ($conf_index_exists > 0) {
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$this->db->query("ALTER TABLE ".$this->config->item('table_name')." DROP INDEX `idx_qsl_confirmations`");
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}
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$this->db->db_debug = true;
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}
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}
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