zend framework 2 join subselect using oracle adapter - php

Question

I've searched throughout the internet and mostly answers apply to ZF1.
I'd like to join a subselect query into another select using select objects. It's crucial for me to get whole Select object at the end of multiple such joins.
Code looks like this:
$subSelect = new Select();
$subSelect->from(array('TABLE' => 'SOME_TABLE'));
$subSelect->columns(array('ID'));
$select = new Select();
$select->from(array('SEC_TABLE' => 'SOME_ANOTHER_TABLE'));
$select->join(
array('SUB' => $subSelect),
'SUB.ID = SEC_TABLE.ID',
array(),
$select::JOIN_LEFT
);
It was possible in ZF1 using class Zend_Db_Expr, is there any nice way to this in ZF2?

Answer 1

This is answered here
In ZF2 you can combine two Select object instance using its Select::combine() method.
$select->combine($subSelect);

Answer 2

I tried to use Select::combine() but it is functionality used for things such as UNION or INTERSECT or MINUS - keywords placed between select statements. I need pure JOIN and the problem is that Oracle Adapter in ZF2 overwrites standard approach to processJoins method.
Here is the code from Zend/Db/Sql/Select
protected function processJoins(PlatformInterface $platform, DriverInterface $driver = null, ParameterContainer $parameterContainer = null)
{
if (!$this->joins) {
return null;
}
// process joins
$joinSpecArgArray = array();
foreach ($this->joins as $j => $join) {
$joinSpecArgArray[$j] = array();
$joinName = null;
$joinAs = null;
// type
$joinSpecArgArray[$j][] = strtoupper($join['type']);
// table name
if (is_array($join['name'])) {
$joinName = current($join['name']);
$joinAs = $platform->quoteIdentifier(key($join['name']));
} else {
$joinName = $join['name'];
}
if ($joinName instanceof ExpressionInterface) {
$joinName = $joinName->getExpression();
} elseif ($joinName instanceof TableIdentifier) {
$joinName = $joinName->getTableAndSchema();
$joinName = ($joinName[1] ? $platform->quoteIdentifier($joinName[1]) . $platform->getIdentifierSeparator() : '') . $platform->quoteIdentifier($joinName[0]);
} else {
if ($joinName instanceof Select) {
$joinName = '(' . $this->processSubSelect($joinName, $platform, $driver, $parameterContainer) . ')';
} else {
$joinName = $platform->quoteIdentifier($joinName);
}
}
$joinSpecArgArray[$j][] = (isset($joinAs)) ? $joinName . ' AS ' . $joinAs : $joinName;
// on expression
// note: for Expression objects, pass them to processExpression with a prefix specific to each join (used for named parameters)
$joinSpecArgArray[$j][] = ($join['on'] instanceof ExpressionInterface)
? $this->processExpression($join['on'], $platform, $driver, $this->processInfo['paramPrefix'] . 'join' . ($j+1) . 'part')
: $platform->quoteIdentifierInFragment($join['on'], array('=', 'AND', 'OR', '(', ')', 'BETWEEN', '<', '>')); // on
if ($joinSpecArgArray[$j][2] instanceof StatementContainerInterface) {
if ($parameterContainer) {
$parameterContainer->merge($joinSpecArgArray[$j][2]->getParameterContainer());
}
$joinSpecArgArray[$j][2] = $joinSpecArgArray[$j][2]->getSql();
}
}
return array($joinSpecArgArray);
}
and here from Zend/Db/Platform/Oracle/Select/SelectDecorator which extends standard Select class and is used for Oracle database:
protected function processJoins(PlatformInterface $platform, DriverInterface $driver = null, ParameterContainer $parameterContainer = null)
{
if (!$this->joins) {
return null;
}
// process joins
$joinSpecArgArray = array();
foreach ($this->joins as $j => $join) {
$joinSpecArgArray[$j] = array();
// type
$joinSpecArgArray[$j][] = strtoupper($join['type']);
// table name
$joinSpecArgArray[$j][] = (is_array($join['name']))
? $platform->quoteIdentifier(current($join['name'])) . ' ' . $platform->quoteIdentifier(key($join['name']))
: $platform->quoteIdentifier($join['name']);
// on expression
$joinSpecArgArray[$j][] = ($join['on'] instanceof ExpressionInterface)
? $this->processExpression($join['on'], $platform, $driver, $this->processInfo['paramPrefix'] . 'join')
: $platform->quoteIdentifierInFragment($join['on'], array('=', 'AND', 'OR', '(', ')', 'BETWEEN')); // on
if ($joinSpecArgArray[$j][2] instanceof StatementContainerInterface) {
if ($parameterContainer) {
$parameterContainer->merge($joinSpecArgArray[$j][2]->getParameterContainer());
}
$joinSpecArgArray[$j][2] = $joinSpecArgArray[$j][2]->getSql();
}
}
return array($joinSpecArgArray);
}
As standard Select class allows you to join another Select ( line : if ($joinName instanceof Select) {), Oracle extended version doesn't.
Is it just a bug in Zend?
Is there any way around it?
It's not in any way connected to Oracle specification, why is it so then?