public function testExpressionSelectExpression()
{
$this->assertEquals('(SUM(field1) + SUM(field2)) AS sum_field', QueryAssembler::stringify(ExpressionSelectExpression::createWithAlias(AdditionExpression::create(SumSelectExpression::create('field1'), SumSelectExpression::create('field2')), 'sum_field')));
$this->assertEquals('SELECT (SUM(field1) + SUM(field2)) AS sum_field FROM tbl HAVING sum_field >= 5', QueryAssembler::stringify(QueryBuilder::select(ExpressionSelectExpression::createWithAlias(AdditionExpression::create(SumSelectExpression::create('field1'), SumSelectExpression::create('field2')), 'sum_field'))->from('tbl')->having(GreaterThanOrEqualPredicate::create('sum_field', 5))));
}
public function assembleExpressionSelect(ExpressionSelectExpression $expr)
{
return $this->assembleSegment($expr->getField()) . ($expr->hasAlias() ? ' AS ' . $this->escapeField($expr->getAlias()) : '');
}