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adodb-db2.inc.php
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adodb-db2.inc.php
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<?php
/**
@version v5.21.0-rc.1 2021-02-02
@copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
@copyright (c) 2014 Damien Regad, Mark Newnham and the ADOdb community
Released under both BSD license and Lesser GPL library license.
Whenever there is any discrepancy between the two licenses,
the BSD license will take precedence.
Set tabs to 4 for best viewing.
* Driver for use with IBM DB2 Native Client
*
* 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
* @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 = '"';
/*
* Executed after successful connection
*/
public $connectStmt = '';
/*
* Holds the current database name
*/
private $databaseName = '';
/*
* Holds information about the stored procedure request
* currently being built
*/
private $storedProcedureParameters = false;
function __construct() {}
function _insertid()
{
return ADOConnection::GetOne('VALUES IDENTITY_VAL_LOCAL()');
}
public function _connect($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)
{
global $php_errormsg;
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);
$php_errormsg = '';
$this->_errorMsg = @db2_conn_errormsg();
if ($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)
{
global $php_errormsg;
$connectionParameters = array('dsn'=>'',
'uid'=>'',
'pwd'=>'',
'database'=>'',
'catalogue'=>true
);
/*
* Uou can either connect to a catalogued connection
* with a database name e.g. 'SAMPLE'
* or an uncatalogued connection with a DSN like connection
* DATABASE=database;HOSTNAME=hostname;PORT=port;PROTOCOL=TCPIP;UID=username;PWD=password;
*/
if (!$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';
$php_errormsg = $errorMessage;
if ($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';
$php_errormsg = $errorMessage;
if ($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->databaseName = $argDatabasename;
$argDSN .= ';database=' . $argDatabasename;
$argDatabasename = '';
$useCataloguedConnection = false;
}
else
{
$errorMessage = 'Uncatalogued connection parameters ';
$errorMessage.= 'must contain a database= argument';
$php_errormsg = $errorMessage;
if ($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->databaseName = $argDatabasename;
elseif (!$this->databaseName)
$this->databaseName = $this->getDatabasenameFromDsn($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('.adodb_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 assoc array where keys are tables, and values are foreign keys
*
* @param string $table
* @param string $owner [optional][discarded]
* @param bool $upper [optional][discarded]
* @param bool $associative[optional][discarded]
*
* @return mixed[] Array of foreign key information
*/
public function metaForeignKeys($table, $owner = FALSE, $upper = FALSE, $asociative = 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[]