110 lines
2.6 KiB
PHP
110 lines
2.6 KiB
PHP
<?php
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namespace SilverStripe\PostgreSQL;
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use SilverStripe\ORM\Connect\Query;
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/**
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* A result-set from a PostgreSQL database.
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*
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* @package sapphire
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* @subpackage model
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*/
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class PostgreSQLQuery extends Query
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{
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/**
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* The internal Postgres handle that points to the result set.
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* @var resource
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*/
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private $handle;
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private $columnNames = [];
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/**
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* Mapping of postgresql types to PHP types
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* Note that the bool => int mapping is by design, designed to mimic MySQL's behaviour
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* @var array
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*/
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protected static $typeMapping = [
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'bool' => 'int',
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'int2' => 'int',
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'int4' => 'int',
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'int8' => 'int',
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'float4' => 'float',
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'float8' => 'float',
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'numeric' => 'float',
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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 sapphire.
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* @param resource $handle the internal Postgres handle that is points to the resultset.
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*/
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public function __construct($handle)
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{
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$this->handle = $handle;
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$numColumns = pg_num_fields($handle);
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for ($i = 0; $i<$numColumns; $i++) {
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$this->columnNames[$i] = pg_field_name($handle, $i);
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}
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}
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public function __destruct()
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{
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if (is_resource($this->handle)) {
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pg_free_result($this->handle);
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}
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}
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public function seek($row)
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{
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// Specifying the zero-th record here will reset the pointer
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$result = pg_fetch_array($this->handle, $row, PGSQL_NUM);
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return $this->parseResult($result);
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}
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public function numRecords()
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{
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return pg_num_rows($this->handle);
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}
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public function nextRecord()
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{
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$row = pg_fetch_array($this->handle, null, PGSQL_NUM);
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// Correct non-string types
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if ($row) {
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return $this->parseResult($row);
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}
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return false;
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}
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/**
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* @param array $row
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* @return array
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*/
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protected function parseResult(array $row)
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{
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$record = [];
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foreach ($row as $i => $v) {
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$k = $this->columnNames[$i];
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$record[$k] = $v;
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$type = pg_field_type($this->handle, $i);
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if (isset(self::$typeMapping[$type])) {
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if ($type === 'bool' && $record[$k] === 't') {
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$record[$k] = 1;
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// Note that boolean 'f' will be converted to 0 by this
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} else {
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settype($record[$k], self::$typeMapping[$type]);
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}
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}
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}
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return $record;
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}
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}
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