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adodb-db2.inc.php
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adodb-db2.inc.php
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<?php
/**
* IBM DB2 Native Client driver.
*
* Originally DB2 drivers were dependent on an ODBC driver, and some installations
* may still use that. To use an ODBC driver connection, use the odbc_db2
* ADOdb driver. For Linux, you need the 'ibm_db2' PECL extension for PHP,
* For Windows, you need to locate an appropriate version of the php_ibm_db2.dll,
* as well as the IBM data server client software.
* This is basically a full rewrite of the original driver, for information
* about all the changes, see the update information on the ADOdb website
* for version 5.21.0.
*
* @link http://pecl.php.net/package/ibm_db2 PECL Extension For DB2
*
* 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
* @author Mark Newnham
*/
// security - hide paths
if (!defined('ADODB_DIR')) die();
define("_ADODB_DB2_LAYER", 2 );
class ADODB_db2 extends ADOConnection {
var $databaseType = "db2";
var $fmtDate = "'Y-m-d'";
var $concat_operator = '||';
var $sysTime = 'CURRENT TIME';
var $sysDate = 'CURRENT DATE';
var $sysTimeStamp = 'CURRENT TIMESTAMP';
var $fmtTimeStamp = "'Y-m-d H:i:s'";
var $replaceQuote = "''"; // string to use to replace quotes
var $dataProvider = "db2";
var $hasAffectedRows = true;
var $binmode = DB2_BINARY;
/*
* setting this to true will make array elements in FETCH_ASSOC
* mode case-sensitive breaking backward-compat
*/
var $useFetchArray = false;
var $_bindInputArray = true;
var $_genIDSQL = "VALUES NEXTVAL FOR %s";
var $_genSeqSQL = "
CREATE SEQUENCE %s START WITH %s
NO MAXVALUE NO CYCLE INCREMENT BY 1 NO CACHE
";
var $_dropSeqSQL = "DROP SEQUENCE %s";
var $_autocommit = true;
var $_lastAffectedRows = 0;
var $hasInsertID = true;
var $hasGenID = true;
/*
* Character used to wrap column and table names for escaping special
* characters in column and table names as well as forcing upper and
* lower case
*/
public $nameQuote = '"';
/*
* Holds information about the stored procedure request
* currently being built
*/
private $storedProcedureParameters = false;
function __construct() {}
protected function _insertID($table = '', $column = '')
{
return ADOConnection::GetOne('VALUES IDENTITY_VAL_LOCAL()');
}
public function _connect($argDSN, $argUsername, $argPassword, $argDatabasename)
{
return $this->doDB2Connect($argDSN, $argUsername, $argPassword, $argDatabasename);
}
public function _pconnect($argDSN, $argUsername, $argPassword, $argDatabasename)
{
return $this->doDB2Connect($argDSN, $argUsername, $argPassword, $argDatabasename,true);
}
private function doDB2Connect($argDSN, $argUsername, $argPassword, $argDatabasename, $persistent=false)
{
if (!function_exists('db2_connect')) {
ADOConnection::outp("DB2 extension not installed.");
return null;
}
$connectionParameters = $this->unpackParameters($argDSN,
$argUsername,
$argPassword,
$argDatabasename);
if ($connectionParameters == null)
{
/*
* Error thrown
*/
return null;
}
$argDSN = $connectionParameters['dsn'];
$argUsername = $connectionParameters['uid'];
$argPassword = $connectionParameters['pwd'];
$argDatabasename = $connectionParameters['database'];
$useCataloguedConnection = $connectionParameters['catalogue'];
if ($this->debug){
if ($useCataloguedConnection){
$connectMessage = "Catalogued connection using parameters: ";
$connectMessage .= "DB=$argDatabasename / ";
$connectMessage .= "UID=$argUsername / ";
$connectMessage .= "PWD=$argPassword";
}
else
{
$connectMessage = "Uncatalogued connection using DSN: $argDSN";
}
ADOConnection::outp($connectMessage);
}
/*
* This needs to be set before the connect().
*/
ini_set('ibm_db2.binmode', $this->binmode);
if ($persistent)
$db2Function = 'db2_pconnect';
else
$db2Function = 'db2_connect';
/*
* We need to flatten out the connectionParameters
*/
$db2Options = array();
if ($this->connectionParameters)
{
foreach($this->connectionParameters as $p)
foreach($p as $k=>$v)
$db2Options[$k] = $v;
}
if ($useCataloguedConnection)
$this->_connectionID = $db2Function($argDatabasename,
$argUsername,
$argPassword,
$db2Options);
else
$this->_connectionID = $db2Function($argDSN,
null,
null,
$db2Options);
$this->_errorMsg = @db2_conn_errormsg();
if ($this->_connectionID && $this->connectStmt)
$this->execute($this->connectStmt);
return $this->_connectionID != false;
}
/**
* Validates and preprocesses the passed parameters for consistency
*
* @param string $argDSN Either DSN or database
* @param string $argUsername User name or null
* @param string $argPassword Password or null
* @param string $argDatabasename Either DSN or database
*
* @return mixed array if correct, null if not
*/
private function unpackParameters($argDSN, $argUsername, $argPassword, $argDatabasename)
{
$connectionParameters = array('dsn'=>'',
'uid'=>'',
'pwd'=>'',
'database'=>'',
'catalogue'=>true
);
/*
* Uou can either connect to a catalogued connection
* with a database name e.g. 'SAMPLE'
* or an uncatalogued connection with a DSN like connection
* DATABASE=database;HOSTNAME=hostname;PORT=port;PROTOCOL=TCPIP;UID=username;PWD=password;
*/
if (!$argDSN && !$argDatabasename)
{
$errorMessage = 'Supply either catalogued or uncatalogued connection parameters';
$this->_errorMsg = $errorMessage;
if ($this->debug)
ADOConnection::outp($errorMessage);
return null;
}
$useCataloguedConnection = true;
$schemaName = '';
if ($argDSN && $argDatabasename)
{
/*
* If a catalogued connection if provided,
* as well as user and password
* that will take priority
*/
if ($argUsername && $argPassword && !$this->isDsn($argDatabasename))
{
if ($this->debug){
$errorMessage = 'Warning: Because you provided user,';
$errorMessage.= 'password and database, DSN connection ';
$errorMessage.= 'parameters were discarded';
ADOConnection::outp($errorMessage);
}
$argDSN = '';
}
else if ($this->isDsn($argDSN) && $this->isDsn($argDatabasename))
{
$errorMessage = 'Supply uncatalogued connection parameters ';
$errorMessage.= 'in either the database or DSN arguments, ';
$errorMessage.= 'but not both';
if ($this->debug)
ADOConnection::outp($errorMessage);
return null;
}
}
if (!$this->isDsn($argDSN) && $this->isDsn($argDatabasename))
{
/*
* Switch them around for next test
*/
$temp = $argDSN;
$argDsn = $argDatabasename;
$argDatabasenME = $temp;
}
if ($this->isDsn($argDSN))
{
if (!preg_match('/uid=/i',$argDSN)
|| !preg_match('/pwd=/i',$argDSN))
{
$errorMessage = 'For uncatalogued connections, provide ';
$errorMessage.= 'both UID and PWD in the connection string';
if ($this->debug)
ADOConnection::outp($errorMessage);
return null;
}
if (preg_match('/database=/i',$argDSN))
{
if ($argDatabasename)
{
$argDatabasename = '';
if ($this->debug)
{
$errorMessage = 'Warning: Because you provided ';
$errorMessage.= 'database information in the DSN ';
$errorMessage.= 'parameters, the supplied database ';
$errorMessage.= 'name was discarded';
ADOConnection::outp($errorMessage);
}
}
$useCataloguedConnection = false;
}
elseif ($argDatabasename)
{
$this->database = $argDatabasename;
$argDSN .= ';database=' . $argDatabasename;
$argDatabasename = '';
$useCataloguedConnection = false;
}
else
{
$errorMessage = 'Uncatalogued connection parameters ';
$errorMessage.= 'must contain a database= argument';
if ($this->debug)
ADOConnection::outp($errorMessage);
return null;
}
}
if ($argDSN && !$argDatabasename && $useCataloguedConnection)
{
$argDatabasename = $argDSN;
$argDSN = '';
}
if ($useCataloguedConnection
&& (!$argDatabasename
|| !$argUsername
|| !$argPassword))
{
$errorMessage = 'For catalogued connections, provide ';
$errorMessage.= 'database, username and password';
$this->_errorMsg = $errorMessage;
if ($this->debug)
ADOConnection::outp($errorMessage);
return null;
}
if ($argDatabasename)
$this->database = $argDatabasename;
elseif (!$this->database)
$this->database = $this->getDatabasenameFromDsn($argDSN);
$connectionParameters = array('dsn'=>$argDSN,
'uid'=>$argUsername,
'pwd'=>$argPassword,
'database'=>$argDatabasename,
'catalogue'=>$useCataloguedConnection
);
return $connectionParameters;
}
/**
* Does the provided string look like a DSN
*
* @param string $dsnString
*
* @return bool
*/
private function isDsn($dsnString){
$dsnArray = preg_split('/[;=]+/',$dsnString);
if (count($dsnArray) > 2)
return true;
return false;
}
/**
* Gets the database name from the DSN
*
* @param string $dsnString
*
* @return string
*/
private function getDatabasenameFromDsn($dsnString){
$dsnArray = preg_split('/[;=]+/',$dsnString);
$dbIndex = array_search('database',$dsnArray);
return $dsnArray[$dbIndex + 1];
}
/**
* format and return date string in database timestamp format
*
* @param mixed $ts either a string or a unixtime
* @param bool $isField discarded
*
* @return string
*/
function dbTimeStamp($ts,$isField=false)
{
if (empty($ts) && $ts !== 0) return 'null';
if (is_string($ts)) $ts = ADORecordSet::unixTimeStamp($ts);
return 'TO_DATE('.date($this->fmtTimeStamp,$ts).",'YYYY-MM-DD HH24:MI:SS')";
}
/**
* Format date column in sql string given an input format that understands Y M D
*
* @param string $fmt
* @param bool $col
*
* @return string
*/
function sqlDate($fmt, $col=false)
{
if (!$col) $col = $this->sysDate;
/* use TO_CHAR() if $fmt is TO_CHAR() allowed fmt */
if ($fmt== 'Y-m-d H:i:s')
return 'TO_CHAR('.$col.", 'YYYY-MM-DD HH24:MI:SS')";
$s = '';
$len = strlen($fmt);
for ($i=0; $i < $len; $i++) {
if ($s) $s .= $this->concat_operator;
$ch = $fmt[$i];
switch($ch) {
case 'Y':
case 'y':
if ($len==1) return "year($col)";
$s .= "char(year($col))";
break;
case 'M':
if ($len==1) return "monthname($col)";
$s .= "substr(monthname($col),1,3)";
break;
case 'm':
if ($len==1) return "month($col)";
$s .= "right(digits(month($col)),2)";
break;
case 'D':
case 'd':
if ($len==1) return "day($col)";
$s .= "right(digits(day($col)),2)";
break;
case 'H':
case 'h':
if ($len==1) return "hour($col)";
if ($col != $this->sysDate) $s .= "right(digits(hour($col)),2)";
else $s .= "''";
break;
case 'i':
case 'I':
if ($len==1) return "minute($col)";
if ($col != $this->sysDate)
$s .= "right(digits(minute($col)),2)";
else $s .= "''";
break;
case 'S':
case 's':
if ($len==1) return "second($col)";
if ($col != $this->sysDate)
$s .= "right(digits(second($col)),2)";
else $s .= "''";
break;
default:
if ($ch == '\\') {
$i++;
$ch = substr($fmt,$i,1);
}
$s .= $this->qstr($ch);
}
}
return $s;
}
function serverInfo()
{
$sql = "SELECT service_level, fixpack_num
FROM TABLE(sysproc.env_get_inst_info())
AS INSTANCEINFO";
$row = $this->GetRow($sql);
if ($row) {
$info['version'] = $row[0].':'.$row[1];
$info['fixpack'] = $row[1];
$info['description'] = '';
} else {
return ADOConnection::serverInfo();
}
return $info;
}
function createSequence($seqname='adodbseq',$start=1)
{
if (empty($this->_genSeqSQL))
return false;
$ok = $this->execute(sprintf($this->_genSeqSQL,$seqname,$start));
if (!$ok)
return false;
return true;
}
function dropSequence($seqname='adodbseq')
{
if (empty($this->_dropSeqSQL)) return false;
return $this->execute(sprintf($this->_dropSeqSQL,$seqname));
}
function selectLimit($sql,$nrows=-1,$offset=-1,$inputArr=false,$secs2cache=0)
{
$nrows = (integer) $nrows;
if ($offset <= 0)
{
if ($nrows >= 0)
$sql .= " FETCH FIRST $nrows ROWS ONLY ";
$rs = $this->execute($sql,$inputArr);
}
else
{
if ($offset > 0 && $nrows < 0);
else
{
$nrows += $offset;
$sql .= " FETCH FIRST $nrows ROWS ONLY ";
}
/*
* DB2 has no native support for mid table offset
*/
$rs = ADOConnection::selectLimit($sql,$nrows,$offset,$inputArr);
}
return $rs;
}
function errorMsg()
{
if ($this->_errorMsg !== false)
return $this->_errorMsg;
if (empty($this->_connectionID))
return @db2_conn_errormsg();
return @db2_conn_errormsg($this->_connectionID);
}
function errorNo()
{
if ($this->_errorCode !== false)
return $this->_errorCode;
if (empty($this->_connectionID))
$e = @db2_conn_error();
else
$e = @db2_conn_error($this->_connectionID);
return $e;
}
function beginTrans()
{
if (!$this->hasTransactions)
return false;
if ($this->transOff)
return true;
$this->transCnt += 1;
$this->_autocommit = false;
return db2_autocommit($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;
$ret = @db2_commit($this->_connectionID);
@db2_autocommit($this->_connectionID,true);
return $ret;
}
function RollbackTrans()
{
if ($this->transOff) return true;
if ($this->transCnt) $this->transCnt -= 1;
$this->_autocommit = true;
$ret = @db2_rollback($this->_connectionID);
@db2_autocommit($this->_connectionID,true);
return $ret;
}
/**
* Return a list of Primary Keys for a specified table
*
* We don't use db2_statistics as the function does not seem to play
* well with mixed case table names
*
* @param string $table
* @param bool $primary (optional) only return primary keys
* @param bool $owner (optional) not used in this driver
*
* @return string[] Array of indexes
*/
public function metaPrimaryKeys($table,$owner=false)
{
$primaryKeys = array();
global $ADODB_FETCH_MODE;
$schema = '';
$this->_findschema($table,$schema);
$table = $this->getTableCasedValue($table);
$savem = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
$this->setFetchMode(ADODB_FETCH_NUM);
$sql = "SELECT *
FROM syscat.indexes
WHERE tabname='$table'";
$rows = $this->getAll($sql);
$this->setFetchMode($savem);
$ADODB_FETCH_MODE = $savem;
if (empty($rows))
return false;
foreach ($rows as $r)
{
if ($r[7] != 'P')
continue;
$cols = explode('+',$r[6]);
foreach ($cols as $colIndex=>$col)
{
if ($colIndex == 0)
continue;
$columnName = $this->getMetaCasedValue($col);
$primaryKeys[] = $columnName;
}
break;
}
return $primaryKeys;
}
/**
* Returns a list of Foreign Keys associated with a specific table.
*
* @param string $table
* @param string $owner discarded
* @param bool $upper discarded
* @param bool $associative discarded
*
* @return string[]|false An array where keys are tables, and values are foreign keys;
* false if no foreign keys could be found.
*/
public function metaForeignKeys($table, $owner = '', $upper = false, $associative = false)
{
global $ADODB_FETCH_MODE;
$schema = '';
$this->_findschema($table,$schema);
$savem = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
$this->setFetchMode(ADODB_FETCH_NUM);
$sql = "SELECT SUBSTR(tabname,1,20) table_name,
SUBSTR(constname,1,20) fk_name,
SUBSTR(REFTABNAME,1,12) parent_table,
SUBSTR(refkeyname,1,20) pk_orig_table,
fk_colnames
FROM syscat.references
WHERE tabname = '$table'";
$results = $this->getAll($sql);
$ADODB_FETCH_MODE = $savem;
$this->setFetchMode($savem);
if (empty($results))
return false;
$foreignKeys = array();
foreach ($results as $r)
{
$parentTable = trim($this->getMetaCasedValue($r[2]));
$keyName = trim($this->getMetaCasedValue($r[1]));
$foreignKeys[$parentTable] = $keyName;
}
return $foreignKeys;
}
/**
* Returns a list of tables
*
* @param string $ttype (optional)
* @param string $schema (optional)
* @param string $mask (optional)
*
* @return array
*/
public function metaTables($ttype=false,$schema=false,$mask=false)
{
global $ADODB_FETCH_MODE;
$savem = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
/*
* Values for TABLE_TYPE
* ---------------------------
* ALIAS, HIERARCHY TABLE, INOPERATIVE VIEW, NICKNAME,
* MATERIALIZED QUERY TABLE, SYSTEM TABLE, TABLE,
* TYPED TABLE, TYPED VIEW, and VIEW
*
* If $ttype passed as '', match 'TABLE' and 'VIEW'
* If $ttype passed as 'T' it is assumed to be 'TABLE'
* if $ttype passed as 'V' it is assumed to be 'VIEW'
*/
$ttype = strtoupper($ttype);
if ($ttype) {
/*
* @todo We could do valid type checking or array type
*/
if ($ttype == 'V')
$ttype = 'VIEW';
if ($ttype == 'T')
$ttype = 'TABLE';
}
if (!$schema)
$schema = '%';
if (!$mask)
$mask = '%';
$qid = @db2_tables($this->_connectionID,NULL,$schema,$mask,$ttype);
$rs = new ADORecordSet_db2($qid);
$ADODB_FETCH_MODE = $savem;
if (!$rs)
return false;
$arr = $rs->getArray();
$rs->Close();
$tableList = array();
/*
* Array items
* ---------------------------------
* 0 TABLE_CAT The catalog that contains the table.
* The value is NULL if this table does not have catalogs.
* 1 TABLE_SCHEM Name of the schema that contains the table.
* 2 TABLE_NAME Name of the table.
* 3 TABLE_TYPE Table type identifier for the table.
* 4 REMARKS Description of the table.
*/
for ($i=0; $i < sizeof($arr); $i++)
{
$tableRow = $arr[$i];
$tableName = $tableRow[2];
$tableType = $tableRow[3];
if (!$tableName)
continue;
if ($ttype == '' && (strcmp($tableType,'TABLE') <> 0 && strcmp($tableType,'VIEW') <> 0))
continue;
/*
* Set metacasing if required
*/
$tableName = $this->getMetaCasedValue($tableName);
/*
* If we requested a schema, we prepend the schema
name to the table name
*/
if (strcmp($schema,'%') <> 0)
$tableName = $schema . '.' . $tableName;
$tableList[] = $tableName;
}
return $tableList;
}
/**
* Return a list of indexes for a specified table
*
* We don't use db2_statistics as the function does not seem to play
* well with mixed case table names
*
* @param string $table
* @param bool $primary (optional) only return primary keys
* @param bool $owner (optional) not used in this driver
*
* @return string[] Array of indexes
*/
public function metaIndexes($table, $primary = false, $owner = false) {
global $ADODB_FETCH_MODE;
/* Array(
* [name_of_index] => Array(
* [unique] => true or false
* [columns] => Array(
* [0] => firstcol
* [1] => nextcol
* [2] => etc........
* )
* )
* )
*/
$indices = array();
$primaryKeyName = '';
$table = $this->getTableCasedValue($table);
$savem = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
$this->setFetchMode(ADODB_FETCH_NUM);
$sql = "SELECT *
FROM syscat.indexes
WHERE tabname='$table'";
$rows = $this->getAll($sql);
$this->setFetchMode($savem);
$ADODB_FETCH_MODE = $savem;
if (empty($rows))
return false;
foreach ($rows as $r)
{
$primaryIndex = $r[7] == 'P'?1:0;
if (!$primary)
/*
* Primary key not requested, ignore that one
*/
if ($r[7] == 'P')
continue;
$indexName = $this->getMetaCasedValue($r[1]);
if (!isset($indices[$indexName]))
{
$unique = ($r[7] == 'U')?1:0;
$indices[$indexName] = array('unique'=>$unique,
'primary'=>$primaryIndex,
'columns'=>array()
);
}
$cols = explode('+',$r[6]);
foreach ($cols as $colIndex=>$col)
{
if ($colIndex == 0)
continue;
$columnName = $this->getMetaCasedValue($col);
$indices[$indexName]['columns'][] = $columnName;
}
}
return $indices;
}
/**
* List procedures or functions in an array.
*
* We interrogate syscat.routines instead of calling the PHP
* function procedures because ADOdb requires the type of procedure
* this is not available in the php function
*
* @param string $procedureNamePattern (optional)
* @param string $catalog (optional)
* @param string $schemaPattern (optional)
* @return array of procedures on current database.
*
*/
public function metaProcedures($procedureNamePattern = null, $catalog = null, $schemaPattern = null) {
global $ADODB_FETCH_MODE;
$metaProcedures = array();
$procedureSQL = '';
$catalogSQL = '';
$schemaSQL = '';
$savem = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
if ($procedureNamePattern)
$procedureSQL = "AND ROUTINENAME LIKE " . strtoupper($this->qstr($procedureNamePattern));
if ($catalog)
$catalogSQL = "AND OWNER=" . strtoupper($this->qstr($catalog));
if ($schemaPattern)
$schemaSQL = "AND ROUTINESCHEMA LIKE {$this->qstr($schemaPattern)}";
$fields = "
ROUTINENAME,
CASE ROUTINETYPE
WHEN 'P' THEN 'PROCEDURE'
WHEN 'F' THEN 'FUNCTION'
ELSE 'METHOD'
END AS ROUTINETYPE_NAME,
ROUTINESCHEMA,
REMARKS";
$SQL = "SELECT $fields
FROM syscat.routines
WHERE OWNER IS NOT NULL
$procedureSQL
$catalogSQL
$schemaSQL
ORDER BY ROUTINENAME
";
$result = $this->execute($SQL);
$ADODB_FETCH_MODE = $savem;
if (!$result)
return false;
while ($r = $result->fetchRow()){
$procedureName = $this->getMetaCasedValue($r[0]);
$schemaName = $this->getMetaCasedValue($r[2]);
$metaProcedures[$procedureName] = array('type'=> $r[1],
'catalog' => '',
'schema' => $schemaName,
'remarks' => $r[3]
);
}
return $metaProcedures;
}
/**
* Lists databases. Because instances are independent, we only know about
* the current database name
*
* @return string[]
*/
public function metaDatabases(){
$dbName = $this->getMetaCasedValue($this->database);
return (array)$dbName;
}