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<?php
namespace ipl\Sql;
/**
* Interface for database expressions that do need quoting or escaping, e.g. new Expression('NOW()');
*/
interface ExpressionInterface
{
/**
* Get the statement of the expression
*
* @return string
*/
public function getStatement();
/**
* Get the columns used by the expression
*
* @return array
*/
public function getColumns();
/**
* Set the columns to use by the expression
*
* @param array $columns
*
* @return $this
*/
public function setColumns(array $columns);
/**
* Get the values for the expression
*
* @return array
*/
public function getValues();
}
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