MssqlResultWrapper.php

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<?php
 
namespace Wikimedia\Rdbms;
 
use stdClass;
 
class MssqlResultWrapper extends ResultWrapper {
    private $mSeekTo = null;
 
    public function fetchObject() {
        $res = $this->result;
 
        if ( $this->mSeekTo !== null ) {
            $result = sqlsrv_fetch_object( $res, 'stdClass', [],
                SQLSRV_SCROLL_ABSOLUTE, $this->mSeekTo );
            $this->mSeekTo = null;
        } else {
            $result = sqlsrv_fetch_object( $res );
        }
 
        // Return boolean false when there are no more rows instead of null
        if ( $result === null ) {
            return false;
        }
 
        return $result;
    }
 
    public function fetchRow() {
        $res = $this->result;
 
        if ( $this->mSeekTo !== null ) {
            $result = sqlsrv_fetch_array( $res, SQLSRV_FETCH_BOTH,
                SQLSRV_SCROLL_ABSOLUTE, $this->mSeekTo );
            $this->mSeekTo = null;
        } else {
            $result = sqlsrv_fetch_array( $res );
        }
 
        // Return boolean false when there are no more rows instead of null
        if ( $result === null ) {
            return false;
        }
 
        return $result;
    }
 
    public function seek( $row ) {
        $res = $this->result;
 
        // check bounds
        $numRows = $this->db->numRows( $res );
        $row = intval( $row );
 
        if ( $numRows === 0 ) {
            return false;
        } elseif ( $row < 0 || $row > $numRows - 1 ) {
            return false;
        }
 
        // Unlike MySQL, the seek actually happens on the next access
        $this->mSeekTo = $row;
        return true;
    }
}