66 lines
1.7 KiB
PHP
66 lines
1.7 KiB
PHP
<?php
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require_once("db_common.php");
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/*! MSSQL implementation of DataWrapper
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**/
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class MsSQLDBDataWrapper extends DBDataWrapper{
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private $last_id=""; //!< ID of previously inserted record
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private $insert_operation=false; //!< flag of insert operation
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private $start_from=false; //!< index of start position
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public function query($sql){
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LogMaster::log($sql);
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$res = mssql_query($sql,$this->connection);
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if ($this->insert_operation){
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$last = mssql_fetch_assoc($res);
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$this->last_id = $last["dhx_id"];
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mssql_free_result($res);
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}
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if ($this->start_from)
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mssql_data_seek($res,$this->start_from);
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return $res;
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}
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public function get_next($res){
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return mssql_fetch_assoc($res);
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}
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protected function get_new_id(){
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/*
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MSSQL doesn't support identity or auto-increment fields
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Insert SQL returns new ID value, which stored in last_id field
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*/
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return $this->last_id;
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}
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protected function insert_query($data,$request){
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$sql = parent::insert_query($data,$request);
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$this->insert_operation=true;
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return $sql.";SELECT @@IDENTITY AS dhx_id";
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}
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protected function select_query($select,$from,$where,$sort,$start,$count){
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$sql="SELECT " ;
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if ($count)
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$sql.=" TOP ".($count+$start);
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$sql.=" ".$select." FROM ".$from;
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if ($where) $sql.=" WHERE ".$where;
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if ($sort) $sql.=" ORDER BY ".$sort;
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if ($start && $count)
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$this->start_from=$start;
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else
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$this->start_from=false;
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return $sql;
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}
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public function escape($data){
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/*
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there is no special escaping method for mssql - use common logic
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*/
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return str_replace("'","''",$data);
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}
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public function begin_transaction(){
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$this->query("BEGIN TRAN");
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}
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}
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?>
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