123 lines
2.5 KiB
PHP
123 lines
2.5 KiB
PHP
<?php
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namespace SilverStripe\ORM\Connect;
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/**
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* Provides a record-view for mysqli statements
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*
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* By default streams unbuffered data, but seek(), rewind(), or numRecords() will force the statement to
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* buffer itself and sacrifice any potential performance benefit.
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*
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* @package framework
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* @subpackage orm
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*/
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class MySQLStatement extends SS_Query {
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/**
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* The related mysqli statement object if generated using a prepared query
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*
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* @var mysqli_stmt
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*/
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protected $statement;
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/**
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* Metadata result for this statement
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*
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* @var mysqli_result
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*/
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protected $metadata;
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/**
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* Is the statement bound to the current resultset?
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*
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* @var bool
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*/
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protected $bound = false;
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/**
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* List of column names
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*
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* @var array
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*/
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protected $columns = array();
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/**
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* List of bound variables in the current row
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*
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* @var array
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*/
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protected $boundValues = array();
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/**
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* Binds this statement to the variables
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*/
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protected function bind() {
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$variables = array();
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// Bind each field
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while($field = $this->metadata->fetch_field()) {
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$this->columns[] = $field->name;
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// Note that while boundValues isn't initialised at this point,
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// later calls to $this->statement->fetch() Will populate
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// $this->boundValues later with the next result.
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$variables[] = &$this->boundValues[$field->name];
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}
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$this->bound = true;
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$this->metadata->free();
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// Buffer all results
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$this->statement->store_result();
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call_user_func_array(array($this->statement, 'bind_result'), $variables);
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}
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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 mysqli_stmt $statement The related statement, if present
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* @param mysqli_result $metadata The metadata for this statement
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*/
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public function __construct($statement, $metadata) {
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$this->statement = $statement;
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$this->metadata = $metadata;
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// Immediately bind and buffer
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$this->bind();
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}
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public function __destruct() {
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$this->statement->close();
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$this->closed = true;
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$this->currentRecord = false;
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}
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public function seek($row) {
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$this->rowNum = $row - 1;
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$this->statement->data_seek($row);
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return $this->next();
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}
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public function numRecords() {
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return $this->statement->num_rows();
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}
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public function nextRecord() {
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// Skip data if out of data
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if (!$this->statement->fetch()) {
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return false;
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}
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// Dereferenced row
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$row = array();
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foreach($this->boundValues as $key => $value) {
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$row[$key] = $value;
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}
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return $row;
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}
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public function rewind() {
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return $this->seek(0);
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}
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}
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