private function loadTableColumnsInfo($tableName)
    {
        $tableColumns = $this->db->createCommand('PRAGMA TABLE_INFO (' . $this->quoteValue($tableName) . ')')->queryAll();
        $tableColumns = $this->normalizePdoRowKeyCase($tableColumns, true);

        return ArrayHelper::index($tableColumns, 'cid');
    }
private function loadTableColumnsInfo($tableName)
    {
        $tableColumns = $this->db->createCommand('PRAGMA TABLE_INFO (' . $this->quoteValue($tableName) . ')')->queryAll();
        $tableColumns = $this->normalizePdoRowKeyCase($tableColumns, true);

        return ArrayHelper::index($tableColumns, 'cid');
    }
Returns table columns info.
@param string $tableName table name
@return array