/**
* @param PlatformInterface $platform
* @param DriverInterface $driver
* @param ParameterContainer $parameterContainer
* @param $sqls
* @param $parameters
* @return null
*/
protected function processLimitOffset(PlatformInterface $platform, DriverInterface $driver = null, ParameterContainer $parameterContainer = null, &$sqls, &$parameters)
{
if ($this->limit === null && $this->offset === null) {
return;
}
$selectParameters = $parameters[self::SELECT];
/** if this is a DISTINCT query then real SELECT part goes to second element in array **/
$parameterIndex = 0;
if ($selectParameters[0] === 'DISTINCT') {
unset($selectParameters[0]);
$selectParameters = array_values($selectParameters);
$parameterIndex = 1;
}
$starSuffix = $platform->getIdentifierSeparator() . self::SQL_STAR;
foreach ($selectParameters[0] as $i => $columnParameters) {
if ($columnParameters[0] == self::SQL_STAR || isset($columnParameters[1]) && $columnParameters[1] == self::SQL_STAR || strpos($columnParameters[0], $starSuffix)) {
$selectParameters[0] = [[self::SQL_STAR]];
break;
}
if (isset($columnParameters[1])) {
array_shift($columnParameters);
$selectParameters[0][$i] = $columnParameters;
}
}
// first, produce column list without compound names (using the AS portion only)
array_unshift($sqls, $this->createSqlFromSpecificationAndParameters(['SELECT %1$s FROM (' => current($this->specifications[self::SELECT])], $selectParameters));
if ($parameterContainer) {
// create bottom part of query, with offset and limit using row_number
$limitParamName = $driver->formatParameterName('limit');
$offsetParamName = $driver->formatParameterName('offset');
$offsetForSumParamName = $driver->formatParameterName('offsetForSum');
array_push($sqls, ') AS [ZEND_SQL_SERVER_LIMIT_OFFSET_EMULATION] WHERE [ZEND_SQL_SERVER_LIMIT_OFFSET_EMULATION].[__ZEND_ROW_NUMBER] BETWEEN ' . $offsetParamName . '+1 AND ' . $limitParamName . '+' . $offsetForSumParamName);
$parameterContainer->offsetSet('offset', $this->offset);
$parameterContainer->offsetSet('limit', $this->limit);
$parameterContainer->offsetSetReference('offsetForSum', 'offset');
} else {
array_push($sqls, ') AS [ZEND_SQL_SERVER_LIMIT_OFFSET_EMULATION] WHERE [ZEND_SQL_SERVER_LIMIT_OFFSET_EMULATION].[__ZEND_ROW_NUMBER] BETWEEN ' . (int) $this->offset . '+1 AND ' . (int) $this->limit . '+' . (int) $this->offset);
}
if (isset($sqls[self::ORDER])) {
$orderBy = $sqls[self::ORDER];
unset($sqls[self::ORDER]);
} else {
$orderBy = 'ORDER BY (SELECT 1)';
}
// add a column for row_number() using the order specification
$parameters[self::SELECT][$parameterIndex][] = ['ROW_NUMBER() OVER (' . $orderBy . ')', '[__ZEND_ROW_NUMBER]'];
$sqls[self::SELECT] = $this->createSqlFromSpecificationAndParameters($this->specifications[self::SELECT], $parameters[self::SELECT]);
}
/**
* @param PlatformInterface $platform
* @param Adapter $adapter
* @param ParameterContainer $parameterContainer
* @param $sqls
* @param $parameters
* @return null
*/
protected function processLimitOffset(PlatformInterface $platform, Adapter $adapter = null, ParameterContainer $parameterContainer = null, &$sqls, &$parameters)
{
if ($this->limit === null && $this->offset === null) {
return null;
}
$selectParameters = $parameters[self::SPECIFICATION_SELECT];
$starSuffix = $platform->getIdentifierSeparator() . self::SQL_STAR;
foreach ($selectParameters[0] as $i => $columnParameters) {
if ($columnParameters[0] == self::SQL_STAR || isset($columnParameters[1]) && $columnParameters[1] == self::SQL_STAR || strpos($columnParameters[0], $starSuffix)) {
$selectParameters[0] = array(array(self::SQL_STAR));
break;
}
if (isset($columnParameters[1])) {
array_shift($columnParameters);
$selectParameters[0][$i] = $columnParameters;
}
}
// first, produce column list without compound names (using the AS portion only)
array_unshift($sqls, $this->createSqlFromSpecificationAndParameters(array('SELECT %1$s FROM (' => current($this->specifications[self::SPECIFICATION_SELECT])), $selectParameters));
if ($parameterContainer) {
// create bottom part of query, with offset and limit using row_number
array_push($sqls, ') AS [ZEND_SQL_SERVER_LIMIT_OFFSET_EMULATION] WHERE [ZEND_SQL_SERVER_LIMIT_OFFSET_EMULATION].[__ZEND_ROW_NUMBER] BETWEEN ?+1 AND ?+?');
$parameterContainer->offsetSet('offset', $this->offset);
$parameterContainer->offsetSet('limit', $this->limit);
$parameterContainer->offsetSetReference('offsetForSum', 'offset');
} else {
array_push($sqls, ') AS [ZEND_SQL_SERVER_LIMIT_OFFSET_EMULATION] WHERE [ZEND_SQL_SERVER_LIMIT_OFFSET_EMULATION].[__ZEND_ROW_NUMBER] BETWEEN ' . (int) $this->offset . '+1 AND ' . (int) $this->limit . '+' . (int) $this->offset);
}
if (isset($sqls[self::SPECIFICATION_ORDER])) {
$orderBy = $sqls[self::SPECIFICATION_ORDER];
unset($sqls[self::SPECIFICATION_ORDER]);
} else {
$orderBy = 'SELECT 1';
}
// add a column for row_number() using the order specification
$parameters[self::SPECIFICATION_SELECT][0][] = array('ROW_NUMBER() OVER (' . $orderBy . ')', '[__ZEND_ROW_NUMBER]');
$sqls[self::SPECIFICATION_SELECT] = $this->createSqlFromSpecificationAndParameters($this->specifications[self::SPECIFICATION_SELECT], $parameters[self::SPECIFICATION_SELECT]);
}