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<?php
namespace Wandu\Database\Query;
use Wandu\Database\Contracts\QueryInterface;
use Wandu\Database\Query\Expression\HasWhereExpression;
class SelectQuery extends HasWhereExpression implements QueryInterface
{
/** @var string */
protected $table;
/** @var array */
protected $columns = ['*'];
/**
* @param string $table
* @param array $columns
*/
public function __construct($table, array $columns = [])
$this->table = $table;
$this->columns = $columns;
}
* {@inheritdoc}
public function toSql()
$columnSqlParts = [];
foreach ($this->columns as $key => $column) {
if ($column === '*') {
$columnSqlParts[] = '*';
} else {
$columnSqlParts[] = "`{$column}`";
$parts = ["SELECT ". implode(', ', $columnSqlParts) ." FROM `{$this->table}`"];
if ($part = parent::toSql()) {
$parts[] = $part;
return implode(' ', $parts);
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