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504 lines
9.9 KiB
PHP
504 lines
9.9 KiB
PHP
<?php
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/***************************************************************************
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* mssql.php
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* -------------------
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* begin : Saturday, Feb 13, 2001
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* copyright : (C) 2001 The phpBB Group
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* email : supportphpbb.com
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*
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* $Id$
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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***************************************************************************/
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if(!defined("SQL_LAYER"))
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{
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define("SQL_LAYER","mssql");
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class sql_db
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{
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var $db_connect_id;
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var $query_result;
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var $in_transaction = 0;
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var $transaction_name;
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var $query_limit_offset;
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var $query_limit_numrows;
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var $query_limit_success;
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var $next_id;
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var $row;
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var $num_queries = 0;
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//
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// Constructor
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//
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function sql_db($sqlserver, $sqluser, $sqlpassword, $database, $persistency = true)
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{
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$this->persistency = $persistency;
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$this->user = $sqluser;
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$this->password = $sqlpassword;
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$this->server = $sqlserver;
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$this->dbname = $database;
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if($this->persistency)
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{
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$this->db_connect_id = @mssql_pconnect($this->server, $this->user, $this->password);
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}
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else
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{
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$this->db_connect_id = @mssql_connect($this->server, $this->user, $this->password);
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}
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if($this->db_connect_id)
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{
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if($this->dbname != "")
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{
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$dbselect = @mssql_select_db($this->dbname, $this->db_connect_id);
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if(!$dbselect)
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{
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@mssql_close($this->db_connect_id);
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return false;
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}
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}
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}
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return $this->db_connect_id;
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}
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//
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// Other base methods
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//
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function sql_close()
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{
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if($this->db_connect_id)
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{
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$result = @mssql_close($this->db_connect_id);
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return $result;
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}
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else
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{
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return false;
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}
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}
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//
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// Query method
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//
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function sql_query($query = "", $transaction = FALSE)
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{
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//
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// Remove any pre-existing queries
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//
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unset($this->query_result);
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unset($this->row);
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if($query != "")
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{
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$this->num_queries++;
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if($transaction == BEGIN_TRANSACTION)
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{
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$result = mssql_query("BEGIN TRANSACTION", $this->db_connect_id);
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if(!$result)
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{
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return false;
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}
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$this->in_transaction = TRUE;
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}
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//
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// Does query contain any LIMIT code? If so pull out relevant start and num_results
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// This isn't terribly easy with MSSQL, whatever you do will potentially impact
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// performance compared to an 'in-built' limit
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//
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// Another issue is the 'lack' of a returned true value when a query is valid but has
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// no result set (as with all the other DB interfaces). It seems though that it's
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// 'fair' to say that if a query returns a false result (ie. no resource id) then the
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// SQL was valid but had no result set. If the query returns nothing but the rowcount
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// returns something then there's a problem. This may well be a false assumption though
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// ... needs checking under Windows itself.
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//
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if(eregi("LIMIT", $query))
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{
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preg_match("/^(.*)LIMIT ([0-9]+)[, ]*([0-9]+)*/s", $query, $limits);
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$query = $limits[1];
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if($limits[3])
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{
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$row_offset = $limits[2];
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$num_rows = $limits[3];
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}
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else
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{
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$row_offset = 0;
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$num_rows = $limits[2];
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}
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@mssql_query("SET ROWCOUNT ".($row_offset + $num_rows));
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$this->query_result = @mssql_query($query, $this->db_connect_id);
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@mssql_query("SET ROWCOUNT 0");
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$this->query_limit_success[$this->query_result] = true;
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$this->query_limit_offset[$this->query_result] = -1;
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$this->query_limit_numrows[$this->query_result] = $num_rows;
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if($this->query_result && $row_offset > 0)
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{
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$result = @mssql_data_seek($this->query_result, $row_offset);
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if(!$result)
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{
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$this->query_limit_success[$query_id] = false;
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}
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$this->query_limit_offset[$this->query_result] = $row_offset;
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}
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}
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else if(eregi("^INSERT ", $query))
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{
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$this->query_result = @mssql_query($query, $this->db_connect_id);
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if($this->query_result)
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{
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$next_id_query = @mssql_query("SELECT @@IDENTITY AS this_id");
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$this->next_id[$this->query_result] = $this->sql_fetchfield("this_id", -1, $next_id_query);
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}
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else
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{
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if($this->in_transaction)
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{
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mssql_query("ROLLBACK", $this->db_connect_id);
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$this->in_transaction = FALSE;
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}
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return false;
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}
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$this->query_limit_offset[$this->query_result] = -1;
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$this->query_limit_numrows[$this->query_result] = -1;
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}
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else
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{
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if(eregi("SELECT", $query))
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{
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$this->query_result = @mssql_query($query, $this->db_connect_id);
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}
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else
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{
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$this->query_result = @mssql_query($query, $this->db_connect_id);
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if($this->query_result)
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{
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$this->query_result = uniqid(rand());
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}
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}
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if($this->query_result)
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{
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$affected_query = @mssql_query("SELECT @@ROWCOUNT AS this_count");
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$this->affected_rows[$this->query_result] = $this->sql_fetchfield("this_count", -1, $affected_query);
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$this->query_limit_offset[$this->query_result] = -1;
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$this->query_limit_numrows[$this->query_result] = -1;
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}
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else
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{
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if($this->in_transaction)
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{
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mssql_query("ROLLBACK", $this->db_connect_id);
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$this->in_transaction = FALSE;
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}
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return false;
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}
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}
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if($transaction == END_TRANSACTION)
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{
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$result = mssql_query("COMMIT", $this->db_connect_id);
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}
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return $this->query_result;
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}
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else
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{
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if($transaction == END_TRANSACTION)
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{
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$result = mssql_query("COMMIT", $this->db_connect_id);
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$this->in_transaction = FALSE;
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}
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return false;
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}
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}
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//
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// Other query methods
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//
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function sql_numrows($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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if($this->query_limit_offset[$query_id] > 0)
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{
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$result = @mssql_num_rows($query_id) - $this->query_limit_offset[$query_id];
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}
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else
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{
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$result = @mssql_num_rows($query_id);
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}
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_affectedrows($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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return $this->affected_rows[$query_id];
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}
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else
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{
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return false;
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}
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}
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function sql_numfields($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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$result = @mssql_num_fields($query_id);
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_fieldname($offset, $query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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$result = @mssql_field_name($query_id, $offset);
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_fieldtype($offset, $query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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$result = @mssql_field_type($query_id, $offset);
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_fetchrow($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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if($this->query_limit_offset[$query_id] > 0)
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{
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if($this->query_limit_success)
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{
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$this->row = @mssql_fetch_array($query_id);
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return $this->row;
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}
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else
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{
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return false;
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}
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}
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else
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{
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$this->row = @mssql_fetch_array($query_id);
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return $this->row;
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}
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}
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else
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{
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return false;
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}
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}
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function sql_fetchrowset($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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if($this->query_limit_success[$query_id])
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{
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empty($this->rowset);
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while($this->rowset = @mssql_fetch_array($query_id))
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{
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$result[] = $this->rowset;
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}
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}
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else if($this->query_limit_numrows[$query_id] == -1)
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{
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empty($this->rowset);
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while($this->rowset = @mssql_fetch_array($query_id))
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{
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$result[] = $this->rowset;
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}
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}
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else
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{
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$result = false;
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}
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_fetchfield($field, $row = -1, $query_id)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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if($row != -1)
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{
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if($this->query_limit_offset[$query_id] > 0)
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{
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if($this->query_limit_offset[$query_id] > 0 && $this->query_limit_success)
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{
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$result = @mssql_result($this->query_result, ($this->query_limit_offset[$query_id] + $row), $field);
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}
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else
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{
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return false;
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}
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}
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else
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{
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$result = @mssql_result($this->query_result, $row, $field);
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}
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}
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else
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{
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if(empty($this->row))
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{
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$this->row = @mssql_fetch_array($query_id);
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$result = $this->row[$field];
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}
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}
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_rowseek($rownum, $query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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if($this->query_limit_offset[$query_id] > 0)
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{
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$result = @mssql_data_seek($query_id, ($this->query_limit_offset[$query_id] + $rownum));
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}
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else
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{
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$result = @mssql_data_seek($query_id, $rownum);
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}
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_nextid($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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return $this->next_id[$query_id];
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}
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else
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{
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return false;
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}
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}
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function sql_freeresult($query_id = 0)
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{
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if(!$query_id)
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{
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$query_id = $this->query_result;
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}
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if($query_id)
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{
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$result = @mssql_free_result($query_id);
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return $result;
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}
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else
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{
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return false;
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}
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}
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function sql_error($query_id = 0)
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{
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$result[message] = @mssql_get_last_message();
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return $result;
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}
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} // class sql_db
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} // if ... define
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?>
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