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32 lines
935 B
PHP
32 lines
935 B
PHP
<?php
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defined('BASEPATH') OR exit('No direct script access allowed');
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class Migration_main_recreate_iota_idx extends CI_Migration {
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public function up() {
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$this->add_ix('HRD_IDX_COL_IOTA','`station_id`,`COL_IOTA`');
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}
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public function down(){
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$this->rm_ix('HRD_IDX_COL_IOTA');
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}
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private function add_ix($index,$cols) {
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$ix_exist = $this->db->query("SHOW INDEX FROM ".$this->config->item('table_name')." WHERE Key_name = '".$index."'")->num_rows();
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if ($ix_exist == 0) {
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$sql = "ALTER TABLE ".$this->config->item('table_name')." ADD INDEX `".$index."` (".$cols.");";
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$this->db->query($sql);
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}
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}
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private function rm_ix($index) {
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$ix_exist = $this->db->query("SHOW INDEX FROM ".$this->config->item('table_name')." WHERE Key_name = '".$index."'")->num_rows();
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if ($ix_exist >= 1) {
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$sql = "ALTER TABLE ".$this->config->item('table_name')." DROP INDEX `".$index."`;";
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$this->db->query($sql);
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}
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}
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}
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