function toDialectString(IDialect $dialect)
{
if (!empty($this->chain)) {
$slices = array();
foreach ($this->chain as $expression) {
$sqlExpression = $expression->toDialectString($dialect);
if (empty($sqlExpression)) {
continue;
}
$slices[] = ' ( ' . $sqlExpression . ' ) ';
}
$out = join($this->operator->toDialectString($dialect), $slices);
return $out;
}
return '';
}
/**
* Conjunction chain of expressions
* @return ExpressionChain
*/
static function andChain()
{
return new ExpressionChain(ExpressionChainLogicalOperator::conditionAnd());
}
