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<?php
/**
* Base ODBC driver
*
* This file is part of ADOdb, a Database Abstraction Layer library for PHP.
*
* @package ADOdb
* @link https://adodb.org Project's web site and documentation
* @link https://github.com/ADOdb/ADOdb Source code and issue tracker
*
* The ADOdb Library is dual-licensed, released under both the BSD 3-Clause
* and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,
* any later version. This means you can use it in proprietary products.
* See the LICENSE.md file distributed with this source code for details.
* @license BSD-3-Clause
* @license LGPL-2.1-or-later
*
* @copyright 2000-2013 John Lim
* @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community
*/
// security - hide paths
if (!defined('ADODB_DIR')) die();
define("_ADODB_ODBC_LAYER", 2 );
/*
* These constants are used to set define MetaColumns() method's behavior.
* - METACOLUMNS_RETURNS_ACTUAL makes the driver return the actual type,
* like all other drivers do (default)
* - METACOLUMNS_RETURNS_META is provided for legacy compatibility (makes
* driver behave as it did prior to v5.21)
*
* @see $metaColumnsReturnType
*/
DEFINE('METACOLUMNS_RETURNS_ACTUAL', 0);
DEFINE('METACOLUMNS_RETURNS_META', 1);
/*--------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------*/
class ADODB_odbc extends ADOConnection {
var $databaseType = "odbc";
var $fmtDate = "'Y-m-d'";
var $fmtTimeStamp = "'Y-m-d, h:i:sA'";
var $replaceQuote = "''"; // string to use to replace quotes
var $dataProvider = "odbc";
var $hasAffectedRows = true;
var $binmode = ODBC_BINMODE_RETURN;
var $useFetchArray = false; // setting this to true will make array elements in FETCH_ASSOC mode case-sensitive
// breaking backward-compat
//var $longreadlen = 8000; // default number of chars to return for a Blob/Long field
var $_bindInputArray = false;
var $curmode = SQL_CUR_USE_DRIVER; // See sqlext.h, SQL_CUR_DEFAULT == SQL_CUR_USE_DRIVER == 2L
var $_genSeqSQL = "create table %s (id integer)";
var $_autocommit = true;
var $_lastAffectedRows = 0;
var $uCaseTables = true; // for meta* functions, uppercase table names
/*
* Tells the metaColumns feature whether to return actual or meta type
*/
public $metaColumnsReturnType = METACOLUMNS_RETURNS_ACTUAL;
function __construct() {}
// returns true or false
function _connect($argDSN, $argUsername, $argPassword, $argDatabasename)
{
if (!function_exists('odbc_connect')) return null;
if (!empty($argDatabasename) && stristr($argDSN, 'Database=') === false) {
$argDSN = trim($argDSN);
$endDSN = substr($argDSN, strlen($argDSN) - 1);
if ($endDSN != ';') $argDSN .= ';';
$argDSN .= 'Database='.$argDatabasename;
}
$last_php_error = $this->resetLastError();
if ($this->curmode === false) $this->_connectionID = odbc_connect($argDSN,$argUsername,$argPassword);
else $this->_connectionID = odbc_connect($argDSN,$argUsername,$argPassword,$this->curmode);
$this->_errorMsg = $this->getChangedErrorMsg($last_php_error);
if (isset($this->connectStmt)) $this->Execute($this->connectStmt);
return $this->_connectionID != false;
}
// returns true or false
function _pconnect($argDSN, $argUsername, $argPassword, $argDatabasename)
{
if (!function_exists('odbc_connect')) return null;
$last_php_error = $this->resetLastError();
$this->_errorMsg = '';
if ($this->debug && $argDatabasename) {
ADOConnection::outp("For odbc PConnect(), $argDatabasename is not used. Place dsn in 1st parameter.");
}
// print "dsn=$argDSN u=$argUsername p=$argPassword<br>"; flush();
if ($this->curmode === false) $this->_connectionID = odbc_connect($argDSN,$argUsername,$argPassword);
else $this->_connectionID = odbc_pconnect($argDSN,$argUsername,$argPassword,$this->curmode);
$this->_errorMsg = $this->getChangedErrorMsg($last_php_error);
if ($this->_connectionID && $this->autoRollback) @odbc_rollback($this->_connectionID);
if (isset($this->connectStmt)) $this->Execute($this->connectStmt);
return $this->_connectionID != false;
}
function ServerInfo()
{
if (!empty($this->host)) {
$dsn = strtoupper($this->host);
$first = true;
$found = false;
if (!function_exists('odbc_data_source')) return false;
while(true) {
$rez = @odbc_data_source($this->_connectionID,
$first ? SQL_FETCH_FIRST : SQL_FETCH_NEXT);
$first = false;
if (!is_array($rez)) break;
if (strtoupper($rez['server']) == $dsn) {
$found = true;
break;
}
}
if (!$found) return ADOConnection::ServerInfo();
if (!isset($rez['version'])) $rez['version'] = '';
return $rez;
} else {
return ADOConnection::ServerInfo();
}
}
function CreateSequence($seqname='adodbseq',$start=1)
{
if (empty($this->_genSeqSQL)) return false;
$ok = $this->Execute(sprintf($this->_genSeqSQL,$seqname));
if (!$ok) return false;
$start -= 1;
return $this->Execute("insert into $seqname values($start)");
}
var $_dropSeqSQL = 'drop table %s';
function DropSequence($seqname = 'adodbseq')
{
if (empty($this->_dropSeqSQL)) return false;
return $this->Execute(sprintf($this->_dropSeqSQL,$seqname));
}
/*
This algorithm is not very efficient, but works even if table locking
is not available.
Will return false if unable to generate an ID after $MAXLOOPS attempts.
*/
function GenID($seq='adodbseq',$start=1)
{
// if you have to modify the parameter below, your database is overloaded,
// or you need to implement generation of id's yourself!
$MAXLOOPS = 100;
//$this->debug=1;
while (--$MAXLOOPS>=0) {
$num = $this->GetOne("select id from $seq");
if ($num === false) {
$this->Execute(sprintf($this->_genSeqSQL ,$seq));
$start -= 1;
$num = '0';
$ok = $this->Execute("insert into $seq values($start)");
if (!$ok) return false;
}
$this->Execute("update $seq set id=id+1 where id=$num");
if ($this->affected_rows() > 0) {
$num += 1;
$this->genID = $num;
return $num;
} elseif ($this->affected_rows() == 0) {
// some drivers do not return a valid value => try with another method
$value = $this->GetOne("select id from $seq");
if ($value == $num + 1) {
return $value;
}
}
}
if ($fn = $this->raiseErrorFn) {
$fn($this->databaseType,'GENID',-32000,"Unable to generate unique id after $MAXLOOPS attempts",$seq,$num);
}
return false;
}
function ErrorMsg()
{
if ($this->_errorMsg !== false) return $this->_errorMsg;
if (empty($this->_connectionID)) return @odbc_errormsg();
return @odbc_errormsg($this->_connectionID);
}
function ErrorNo()
{
if ($this->_errorCode !== false) {
// bug in 4.0.6, error number can be corrupted string (should be 6 digits)
return (strlen($this->_errorCode)<=2) ? 0 : $this->_errorCode;
}
if (empty($this->_connectionID)) $e = @odbc_error();
else $e = @odbc_error($this->_connectionID);
// bug in 4.0.6, error number can be corrupted string (should be 6 digits)
// so we check and patch
if (strlen($e)<=2) return 0;
return $e;
}
function BeginTrans()
{
if (!$this->hasTransactions) return false;
if ($this->transOff) return true;
$this->transCnt += 1;
$this->_autocommit = false;
return odbc_autocommit($this->_connectionID,false);
}
function CommitTrans($ok=true)
{
if ($this->transOff) return true;
if (!$ok) return $this->RollbackTrans();
if ($this->transCnt) $this->transCnt -= 1;
$this->_autocommit = true;
$ret = odbc_commit($this->_connectionID);
odbc_autocommit($this->_connectionID,true);
return $ret;
}
function RollbackTrans()
{
if ($this->transOff) return true;
if ($this->transCnt) $this->transCnt -= 1;
$this->_autocommit = true;
$ret = odbc_rollback($this->_connectionID);
odbc_autocommit($this->_connectionID,true);
return $ret;
}
function MetaPrimaryKeys($table,$owner=false)
{
global $ADODB_FETCH_MODE;
if ($this->uCaseTables) $table = strtoupper($table);
$schema = '';
$this->_findschema($table,$schema);
$savem = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
$qid = @odbc_primarykeys($this->_connectionID,'',$schema,$table);
if (!$qid) {
$ADODB_FETCH_MODE = $savem;
return false;
}
$rs = new ADORecordSet_odbc($qid);
$ADODB_FETCH_MODE = $savem;
if (!$rs) return false;
$arr = $rs->GetArray();
$rs->Close();
//print_r($arr);
$arr2 = array();
for ($i=0; $i < sizeof($arr); $i++) {
if ($arr[$i][3]) $arr2[] = $arr[$i][3];
}
return $arr2;
}
function MetaTables($ttype=false,$showSchema=false,$mask=false)
{
global $ADODB_FETCH_MODE;
$savem = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
$qid = odbc_tables($this->_connectionID);
$rs = new ADORecordSet_odbc($qid);
$ADODB_FETCH_MODE = $savem;
if (!$rs) {
$false = false;
return $false;
}
$arr = $rs->GetArray();
//print_r($arr);
$rs->Close();
$arr2 = array();
if ($ttype) {
$isview = strncmp($ttype,'V',1) === 0;
}
for ($i=0; $i < sizeof($arr); $i++) {
if (!$arr[$i][2]) continue;
$type = $arr[$i][3];
if ($ttype) {
if ($isview) {
if (strncmp($type,'V',1) === 0) $arr2[] = $arr[$i][2];
} else if (strncmp($type,'SYS',3) !== 0) $arr2[] = $arr[$i][2];
} else if (strncmp($type,'SYS',3) !== 0) $arr2[] = $arr[$i][2];
}
return $arr2;
}
/*
See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/odbcdatetime_data_type_changes.asp
/ SQL data type codes /
#define SQL_UNKNOWN_TYPE 0
#define SQL_CHAR 1
#define SQL_NUMERIC 2
#define SQL_DECIMAL 3
#define SQL_INTEGER 4
#define SQL_SMALLINT 5
#define SQL_FLOAT 6
#define SQL_REAL 7
#define SQL_DOUBLE 8
#if (ODBCVER >= 0x0300)
#define SQL_DATETIME 9
#endif
#define SQL_VARCHAR 12
/ One-parameter shortcuts for date/time data types /
#if (ODBCVER >= 0x0300)
#define SQL_TYPE_DATE 91
#define SQL_TYPE_TIME 92
#define SQL_TYPE_TIMESTAMP 93
#define SQL_UNICODE (-95)
#define SQL_UNICODE_VARCHAR (-96)
#define SQL_UNICODE_LONGVARCHAR (-97)
*/
function ODBCTypes($t)
{
switch ((integer)$t) {
case 1:
case 12:
case 0:
case -95:
case -96:
return 'C';
case -97:
case -1: //text
return 'X';
case -4: //image
return 'B';
case 9:
case 91:
return 'D';
case 10:
case 11:
case 92:
case 93:
return 'T';
case 4:
case 5:
case -6:
return 'I';
case -11: // uniqidentifier
return 'R';
case -7: //bit
return 'L';
default:
return 'N';
}
}
function MetaColumns($table, $normalize=true)
{
global $ADODB_FETCH_MODE;
$false = false;
if ($this->uCaseTables) $table = strtoupper($table);
$schema = '';
$this->_findschema($table,$schema);
$savem = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
/*if (false) { // after testing, confirmed that the following does not work because of a bug
$qid2 = odbc_tables($this->_connectionID);
$rs = new ADORecordSet_odbc($qid2);
$ADODB_FETCH_MODE = $savem;
if (!$rs) return false;
$rs->_fetch();
while (!$rs->EOF) {
if ($table == strtoupper($rs->fields[2])) {
$q = $rs->fields[0];
$o = $rs->fields[1];
break;
}
$rs->MoveNext();
}
$rs->Close();
$qid = odbc_columns($this->_connectionID,$q,$o,strtoupper($table),'%');
} */
switch ($this->databaseType) {
case 'access':
case 'vfp':
$qid = odbc_columns($this->_connectionID);#,'%','',strtoupper($table),'%');
break;
case 'db2':
$colname = "%";
$qid = odbc_columns($this->_connectionID, "", $schema, $table, $colname);
break;
default:
$qid = @odbc_columns($this->_connectionID,'%','%',strtoupper($table),'%');
if (empty($qid)) $qid = odbc_columns($this->_connectionID);
break;
}
if (empty($qid)) return $false;
$rs = new ADORecordSet_odbc($qid);
$ADODB_FETCH_MODE = $savem;
if (!$rs) return $false;
$rs->_fetch();
$retarr = array();
/*
$rs->fields indices
0 TABLE_QUALIFIER
1 TABLE_SCHEM
2 TABLE_NAME
3 COLUMN_NAME
4 DATA_TYPE
5 TYPE_NAME
6 PRECISION
7 LENGTH
8 SCALE
9 RADIX
10 NULLABLE
11 REMARKS
*/
while (!$rs->EOF) {
// adodb_pr($rs->fields);
if (strtoupper(trim($rs->fields[2])) == $table && (!$schema || strtoupper($rs->fields[1]) == $schema)) {
$fld = new ADOFieldObject();
$fld->name = $rs->fields[3];
if ($this->metaColumnsReturnType == METACOLUMNS_RETURNS_META)
/*
* This is the broken, original value
*/
$fld->type = $this->ODBCTypes($rs->fields[4]);
else
/*
* This is the correct new value
*/
$fld->type = $rs->fields[4];
// ref: http://msdn.microsoft.com/library/default.asp?url=/archive/en-us/dnaraccgen/html/msdn_odk.asp
// access uses precision to store length for char/varchar
if ($fld->type == 'C' or $fld->type == 'X') {
if ($this->databaseType == 'access')
$fld->max_length = $rs->fields[6];
else if ($rs->fields[4] <= -95) // UNICODE
$fld->max_length = $rs->fields[7]/2;
else
$fld->max_length = $rs->fields[7];
} else
$fld->max_length = $rs->fields[7];
$fld->not_null = !empty($rs->fields[10]);
$fld->scale = $rs->fields[8];
$retarr[strtoupper($fld->name)] = $fld;
} else if (sizeof($retarr)>0)
break;
$rs->MoveNext();
}
$rs->Close(); //-- crashes 4.03pl1 -- why?
if (empty($retarr)) $retarr = false;
return $retarr;
}
function Prepare($sql)
{
if (! $this->_bindInputArray) return $sql; // no binding
$stmt = odbc_prepare($this->_connectionID,$sql);
if (!$stmt) {
// we don't know whether odbc driver is parsing prepared stmts, so just return sql
return $sql;
}
return array($sql,$stmt,false);
}
/* returns queryID or false */
function _query($sql,$inputarr=false)
{
$last_php_error = $this->resetLastError();
$this->_errorMsg = '';
if ($inputarr) {
if (is_array($sql)) {
$stmtid = $sql[1];
} else {
$stmtid = odbc_prepare($this->_connectionID,$sql);
if ($stmtid == false) {
$this->_errorMsg = $this->getChangedErrorMsg($last_php_error);
return false;
}
}
if (! odbc_execute($stmtid,$inputarr)) {
//@odbc_free_result($stmtid);
$this->_errorMsg = odbc_errormsg();
$this->_errorCode = odbc_error();
return false;
}
} else if (is_array($sql)) {
$stmtid = $sql[1];
if (!odbc_execute($stmtid)) {
//@odbc_free_result($stmtid);
$this->_errorMsg = odbc_errormsg();
$this->_errorCode = odbc_error();
return false;
}
} else
$stmtid = odbc_exec($this->_connectionID,$sql);
$this->_lastAffectedRows = 0;
if ($stmtid) {
if (@odbc_num_fields($stmtid) == 0) {
$this->_lastAffectedRows = odbc_num_rows($stmtid);
$stmtid = true;
} else {
$this->_lastAffectedRows = 0;
odbc_binmode($stmtid,$this->binmode);
odbc_longreadlen($stmtid,$this->maxblobsize);
}
$this->_errorMsg = '';
$this->_errorCode = 0;
} else {
$this->_errorMsg = odbc_errormsg();
$this->_errorCode = odbc_error();
}
return $stmtid;
}
/*
Insert a null into the blob field of the table first.
Then use UpdateBlob to store the blob.
Usage:
$conn->Execute('INSERT INTO blobtable (id, blobcol) VALUES (1, null)');
$conn->UpdateBlob('blobtable','blobcol',$blob,'id=1');
*/
function UpdateBlob($table,$column,$val,$where,$blobtype='BLOB')
{
return $this->Execute("UPDATE $table SET $column=? WHERE $where",array($val)) != false;
}
// returns true or false
function _close()
{
$ret = @odbc_close($this->_connectionID);
$this->_connectionID = false;
return $ret;
}
function _affectedrows()
{
return $this->_lastAffectedRows;
}
}
/*--------------------------------------------------------------------------------------
Class Name: Recordset
--------------------------------------------------------------------------------------*/
class ADORecordSet_odbc extends ADORecordSet {
var $bind = false;
var $databaseType = "odbc";
var $dataProvider = "odbc";
var $useFetchArray;
function __construct($id,$mode=false)
{
if ($mode === false) {
global $ADODB_FETCH_MODE;
$mode = $ADODB_FETCH_MODE;
}
$this->fetchMode = $mode;
$this->_queryID = $id;
// the following is required for mysql odbc driver in 4.3.1 -- why?
$this->EOF = false;
$this->_currentRow = -1;
//parent::__construct($id);
}
// returns the field object
function FetchField($fieldOffset = -1)
{
$off=$fieldOffset+1; // offsets begin at 1
$o= new ADOFieldObject();
$o->name = @odbc_field_name($this->_queryID,$off);
$o->type = @odbc_field_type($this->_queryID,$off);
$o->max_length = @odbc_field_len($this->_queryID,$off);
if (ADODB_ASSOC_CASE == 0) $o->name = strtolower($o->name);
else if (ADODB_ASSOC_CASE == 1) $o->name = strtoupper($o->name);
return $o;
}
/* Use associative array to get fields array */
function Fields($colname)
{
if ($this->fetchMode & ADODB_FETCH_ASSOC) return $this->fields[$colname];
if (!$this->bind) {
$this->bind = array();
for ($i=0; $i < $this->_numOfFields; $i++) {
$o = $this->FetchField($i);
$this->bind[strtoupper($o->name)] = $i;
}
}
return $this->fields[$this->bind[strtoupper($colname)]];
}
function _initrs()
{
global $ADODB_COUNTRECS;
$this->_numOfRows = ($ADODB_COUNTRECS) ? @odbc_num_rows($this->_queryID) : -1;
$this->_numOfFields = @odbc_num_fields($this->_queryID);
// some silly drivers such as db2 as/400 and intersystems cache return _numOfRows = 0
if ($this->_numOfRows == 0) $this->_numOfRows = -1;
//$this->useFetchArray = $this->connection->useFetchArray;
}
function _seek($row)
{
return false;
}
// speed up SelectLimit() by switching to ADODB_FETCH_NUM as ADODB_FETCH_ASSOC is emulated
function GetArrayLimit($nrows,$offset=-1)
{
if ($offset <= 0) {
$rs = $this->GetArray($nrows);
return $rs;
}
$savem = $this->fetchMode;
$this->fetchMode = ADODB_FETCH_NUM;
$this->Move($offset);
$this->fetchMode = $savem;
if ($this->fetchMode & ADODB_FETCH_ASSOC) {
$this->fields = $this->GetRowAssoc();
}
$results = array();
$cnt = 0;
while (!$this->EOF && $nrows != $cnt) {
$results[$cnt++] = $this->fields;
$this->MoveNext();
}
return $results;
}
function MoveNext()
{
if ($this->_numOfRows != 0 && !$this->EOF) {
$this->_currentRow++;
if( $this->_fetch() ) {
return true;
}
}
$this->fields = false;
$this->EOF = true;
return false;
}
function _fetch()
{
$this->fields = false;
$rez = @odbc_fetch_into($this->_queryID,$this->fields);
if ($rez) {
if ($this->fetchMode & ADODB_FETCH_ASSOC) {
$this->fields = $this->GetRowAssoc();
}
return true;
}
return false;
}
function _close()
{
return @odbc_free_result($this->_queryID);
}
}
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