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<?php |
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namespace SilverStripe\ORM\Connect; |
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use PDOStatement; |
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use PDO; |
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/** |
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* A result-set from a PDO database. |
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*/ |
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class PDOQuery extends Query |
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{ |
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/** |
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* The internal MySQL handle that points to the result set. |
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* @var PDOStatement |
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*/ |
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protected $statement = null; |
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protected $results = null; |
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/** |
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* Hook the result-set given into a Query class, suitable for use by SilverStripe. |
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* @param PDOStatement $statement The internal PDOStatement containing the results |
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*/ |
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public function __construct(PDOStatement $statement, PDOConnector $conn) |
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{ |
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$this->statement = $statement; |
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// Since no more than one PDOStatement for any one connection can be safely |
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// traversed, each statement simply requests all rows at once for safety. |
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// This could be re-engineered to call fetchAll on an as-needed basis |
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// Special case for Postgres |
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if ($conn->getDriver() == 'pgsql') { |
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$this->results = $this->fetchAllPgsql($statement); |
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} else { |
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$this->results = $statement->fetchAll(PDO::FETCH_ASSOC); |
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} |
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$statement->closeCursor(); |
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} |
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/** |
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* Fetch a record form the statement with its type data corrected |
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* Necessary to fix float data retrieved from PGSQL |
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* Returns data as an array of maps |
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* @return array |
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*/ |
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protected function fetchAllPgsql($statement) |
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{ |
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$columnCount = $statement->columnCount(); |
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$columnMeta = []; |
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for ($i = 0; $i<$columnCount; $i++) { |
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$columnMeta[$i] = $statement->getColumnMeta($i); |
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} |
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// Re-map fetched data using columnMeta |
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return array_map( |
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function ($rowArray) use ($columnMeta) { |
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$row = []; |
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foreach ($columnMeta as $i => $meta) { |
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// Coerce floats from string to float |
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// PDO PostgreSQL fails to do this |
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if (isset($meta['native_type']) && strpos($meta['native_type'], 'float') === 0) { |
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$rowArray[$i] = (float)$rowArray[$i]; |
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} |
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$row[$meta['name']] = $rowArray[$i]; |
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} |
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return $row; |
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}, |
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$statement->fetchAll(PDO::FETCH_NUM) |
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); |
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} |
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public function seek($row) |
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{ |
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$this->rowNum = $row - 1; |
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return $this->nextRecord(); |
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} |
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public function numRecords() |
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{ |
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return count($this->results); |
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} |
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public function nextRecord() |
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{ |
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$index = $this->rowNum + 1; |
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if (isset($this->results[$index])) { |
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return $this->results[$index]; |
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} else { |
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return false; |
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} |
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} |
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} |
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silverstripe /
silverstripe-framework
