| 1 | <?php
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| 2 | /*
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| 3 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved.
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| 4 | Released under both BSD license and Lesser GPL library license.
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| 5 | Whenever there is any discrepancy between the two licenses,
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| 6 | the BSD license will take precedence.
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| 7 | Set tabs to 4 for best viewing.
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| 8 |
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| 9 | Latest version is available at http://adodb.sourceforge.net
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| 10 |
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| 11 | DB2 data driver. Requires ODBC.
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| 12 |
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| 13 | From phpdb list:
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| 14 |
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| 15 | Hi Andrew,
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| 16 |
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| 17 | thanks a lot for your help. Today we discovered what
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| 18 | our real problem was:
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| 19 |
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| 20 | After "playing" a little bit with the php-scripts that try
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| 21 | to connect to the IBM DB2, we set the optional parameter
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| 22 | Cursortype when calling odbc_pconnect(....).
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| 23 |
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| 24 | And the exciting thing: When we set the cursor type
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| 25 | to SQL_CUR_USE_ODBC Cursor Type, then
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| 26 | the whole query speed up from 1 till 10 seconds
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| 27 | to 0.2 till 0.3 seconds for 100 records. Amazing!!!
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| 28 |
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| 29 | Therfore, PHP is just almost fast as calling the DB2
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| 30 | from Servlets using JDBC (don't take too much care
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| 31 | about the speed at whole: the database was on a
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| 32 | completely other location, so the whole connection
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| 33 | was made over a slow network connection).
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| 34 |
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| 35 | I hope this helps when other encounter the same
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| 36 | problem when trying to connect to DB2 from
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| 37 | PHP.
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| 38 |
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| 39 | Kind regards,
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| 40 | Christian Szardenings
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| 41 |
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| 42 | 2 Oct 2001
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| 43 | Mark Newnham has discovered that the SQL_CUR_USE_ODBC is not supported by
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| 44 | IBM's DB2 ODBC driver, so this must be a 3rd party ODBC driver.
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| 45 |
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| 46 | From the IBM CLI Reference:
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| 47 |
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| 48 | SQL_ATTR_ODBC_CURSORS (DB2 CLI v5)
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| 49 | This connection attribute is defined by ODBC, but is not supported by DB2
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| 50 | CLI. Any attempt to set or get this attribute will result in an SQLSTATE of
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| 51 | HYC00 (Driver not capable).
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| 52 |
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| 53 | A 32-bit option specifying how the Driver Manager uses the ODBC cursor
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| 54 | library.
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| 55 |
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| 56 | So I guess this means the message [above] was related to using a 3rd party
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| 57 | odbc driver.
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| 58 |
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| 59 | Setting SQL_CUR_USE_ODBC
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| 60 | ========================
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| 61 | To set SQL_CUR_USE_ODBC for drivers that require it, do this:
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| 62 |
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| 63 | $db = NewADOConnection('odbc_db2');
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| 64 | $db->curMode = SQL_CUR_USE_ODBC;
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| 65 | $db->Connect($dsn, $userid, $pwd);
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| 66 |
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| 67 |
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| 68 |
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| 69 | USING CLI INTERFACE
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| 70 | ===================
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| 71 |
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| 72 | I have had reports that the $host and $database params have to be reversed in
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| 73 | Connect() when using the CLI interface. From Halmai Csongor csongor.halmai#nexum.hu:
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| 74 |
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| 75 | > The symptom is that if I change the database engine from postgres or any other to DB2 then the following
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| 76 | > connection command becomes wrong despite being described this version to be correct in the docs.
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| 77 | >
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| 78 | > $connection_object->Connect( $DATABASE_HOST, $DATABASE_AUTH_USER_NAME, $DATABASE_AUTH_PASSWORD, $DATABASE_NAME )
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| 79 | >
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| 80 | > In case of DB2 I had to swap the first and last arguments in order to connect properly.
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| 81 |
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| 82 |
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| 83 | System Error 5
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| 84 | ==============
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| 85 | IF you get a System Error 5 when trying to Connect/Load, it could be a permission problem. Give the user connecting
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| 86 | to DB2 full rights to the DB2 SQLLIB directory, and place the user in the DBUSERS group.
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| 87 | */
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| 88 |
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| 89 | // security - hide paths
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| 90 | if (!defined('ADODB_DIR')) die();
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| 91 |
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| 92 | if (!defined('_ADODB_ODBC_LAYER')) {
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| 93 | include(ADODB_DIR."/drivers/adodb-odbc.inc.php");
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| 94 | }
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| 95 | if (!defined('ADODB_ODBC_DB2')){
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| 96 | define('ADODB_ODBC_DB2',1);
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| 97 |
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| 98 | class ADODB_ODBC_DB2 extends ADODB_odbc {
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| 99 | var $databaseType = "db2";
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| 100 | var $concat_operator = '||';
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| 101 | var $sysTime = 'CURRENT TIME';
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| 102 | var $sysDate = 'CURRENT DATE';
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| 103 | var $sysTimeStamp = 'CURRENT TIMESTAMP';
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| 104 | // The complete string representation of a timestamp has the form
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| 105 | // yyyy-mm-dd-hh.mm.ss.nnnnnn.
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| 106 | var $fmtTimeStamp = "'Y-m-d-H.i.s'";
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| 107 | var $ansiOuter = true;
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| 108 | var $identitySQL = 'values IDENTITY_VAL_LOCAL()';
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| 109 | var $_bindInputArray = true;
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| 110 | var $hasInsertID = true;
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| 111 | var $rsPrefix = 'ADORecordset_odbc_';
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| 112 |
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| 113 | function ADODB_DB2()
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| 114 | {
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| 115 | if (strncmp(PHP_OS,'WIN',3) === 0) $this->curmode = SQL_CUR_USE_ODBC;
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| 116 | $this->ADODB_odbc();
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| 117 | }
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| 118 |
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| 119 | function IfNull( $field, $ifNull )
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| 120 | {
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| 121 | return " COALESCE($field, $ifNull) "; // if DB2 UDB
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| 122 | }
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| 123 |
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| 124 | function ServerInfo()
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| 125 | {
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| 126 | //odbc_setoption($this->_connectionID,1,101 /*SQL_ATTR_ACCESS_MODE*/, 1 /*SQL_MODE_READ_ONLY*/);
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| 127 | $vers = $this->GetOne('select versionnumber from sysibm.sysversions');
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| 128 | //odbc_setoption($this->_connectionID,1,101, 0 /*SQL_MODE_READ_WRITE*/);
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| 129 | return array('description'=>'DB2 ODBC driver', 'version'=>$vers);
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| 130 | }
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| 131 |
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| 132 | function _insertid()
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| 133 | {
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| 134 | return $this->GetOne($this->identitySQL);
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| 135 | }
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| 136 |
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| 137 | function RowLock($tables,$where,$flds='1 as ignore')
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| 138 | {
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| 139 | if ($this->_autocommit) $this->BeginTrans();
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| 140 | return $this->GetOne("select $flds from $tables where $where for update");
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| 141 | }
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| 142 |
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| 143 | function &MetaTables($ttype=false,$showSchema=false, $qtable="%", $qschema="%")
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| 144 | {
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| 145 | global $ADODB_FETCH_MODE;
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| 146 |
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| 147 | $savem = $ADODB_FETCH_MODE;
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| 148 | $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
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| 149 | $qid = odbc_tables($this->_connectionID, "", $qschema, $qtable, "");
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| 150 |
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| 151 | $rs = new ADORecordSet_odbc($qid);
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| 152 |
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| 153 | $ADODB_FETCH_MODE = $savem;
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| 154 | if (!$rs) {
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| 155 | $false = false;
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| 156 | return $false;
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| 157 | }
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| 158 | $rs->_has_stupid_odbc_fetch_api_change = $this->_has_stupid_odbc_fetch_api_change;
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| 159 |
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| 160 | $arr =& $rs->GetArray();
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| 161 | //print_r($arr);
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| 162 |
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| 163 | $rs->Close();
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| 164 | $arr2 = array();
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| 165 |
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| 166 | if ($ttype) {
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| 167 | $isview = strncmp($ttype,'V',1) === 0;
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| 168 | }
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| 169 | for ($i=0; $i < sizeof($arr); $i++) {
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| 170 |
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| 171 | if (!$arr[$i][2]) continue;
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| 172 | if (strncmp($arr[$i][1],'SYS',3) === 0) continue;
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| 173 |
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| 174 | $type = $arr[$i][3];
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| 175 |
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| 176 | if ($showSchema) $arr[$i][2] = $arr[$i][1].'.'.$arr[$i][2];
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| 177 |
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| 178 | if ($ttype) {
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| 179 | if ($isview) {
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| 180 | if (strncmp($type,'V',1) === 0) $arr2[] = $arr[$i][2];
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| 181 | } else if (strncmp($type,'T',1) === 0) $arr2[] = $arr[$i][2];
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| 182 | } else if (strncmp($type,'S',1) !== 0) $arr2[] = $arr[$i][2];
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| 183 | }
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| 184 | return $arr2;
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| 185 | }
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| 186 |
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| 187 | function &MetaIndexes ($table, $primary = FALSE, $owner=false)
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| 188 | {
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| 189 | // save old fetch mode
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| 190 | global $ADODB_FETCH_MODE;
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| 191 | $save = $ADODB_FETCH_MODE;
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| 192 | $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
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| 193 | if ($this->fetchMode !== FALSE) {
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| 194 | $savem = $this->SetFetchMode(FALSE);
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| 195 | }
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| 196 | $false = false;
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| 197 | // get index details
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| 198 | $table = strtoupper($table);
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| 199 | $SQL="SELECT NAME, UNIQUERULE, COLNAMES FROM SYSIBM.SYSINDEXES WHERE TBNAME='$table'";
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| 200 | if ($primary)
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| 201 | $SQL.= " AND UNIQUERULE='P'";
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| 202 | $rs = $this->Execute($SQL);
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| 203 | if (!is_object($rs)) {
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| 204 | if (isset($savem))
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| 205 | $this->SetFetchMode($savem);
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| 206 | $ADODB_FETCH_MODE = $save;
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| 207 | return $false;
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| 208 | }
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| 209 | $indexes = array ();
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| 210 | // parse index data into array
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| 211 | while ($row = $rs->FetchRow()) {
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| 212 | $indexes[$row[0]] = array(
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| 213 | 'unique' => ($row[1] == 'U' || $row[1] == 'P'),
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| 214 | 'columns' => array()
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| 215 | );
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| 216 | $cols = ltrim($row[2],'+');
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| 217 | $indexes[$row[0]]['columns'] = explode('+', $cols);
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| 218 | }
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| 219 | if (isset($savem)) {
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| 220 | $this->SetFetchMode($savem);
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| 221 | $ADODB_FETCH_MODE = $save;
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| 222 | }
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| 223 | return $indexes;
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| 224 | }
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| 225 |
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| 226 | // Format date column in sql string given an input format that understands Y M D
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| 227 | function SQLDate($fmt, $col=false)
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| 228 | {
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| 229 | // use right() and replace() ?
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| 230 | if (!$col) $col = $this->sysDate;
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| 231 | $s = '';
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| 232 |
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| 233 | $len = strlen($fmt);
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| 234 | for ($i=0; $i < $len; $i++) {
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| 235 | if ($s) $s .= '||';
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| 236 | $ch = $fmt[$i];
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| 237 | switch($ch) {
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| 238 | case 'Y':
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| 239 | case 'y':
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| 240 | $s .= "char(year($col))";
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| 241 | break;
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| 242 | case 'M':
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| 243 | $s .= "substr(monthname($col),1,3)";
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| 244 | break;
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| 245 | case 'm':
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| 246 | $s .= "right(digits(month($col)),2)";
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| 247 | break;
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| 248 | case 'D':
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| 249 | case 'd':
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| 250 | $s .= "right(digits(day($col)),2)";
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| 251 | break;
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| 252 | case 'H':
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| 253 | case 'h':
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| 254 | if ($col != $this->sysDate) $s .= "right(digits(hour($col)),2)";
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| 255 | else $s .= "''";
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| 256 | break;
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| 257 | case 'i':
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| 258 | case 'I':
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| 259 | if ($col != $this->sysDate)
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| 260 | $s .= "right(digits(minute($col)),2)";
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| 261 | else $s .= "''";
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| 262 | break;
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| 263 | case 'S':
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| 264 | case 's':
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| 265 | if ($col != $this->sysDate)
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| 266 | $s .= "right(digits(second($col)),2)";
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| 267 | else $s .= "''";
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| 268 | break;
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| 269 | default:
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| 270 | if ($ch == '\\') {
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| 271 | $i++;
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| 272 | $ch = substr($fmt,$i,1);
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| 273 | }
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| 274 | $s .= $this->qstr($ch);
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| 275 | }
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| 276 | }
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| 277 | return $s;
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| 278 | }
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| 279 |
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| 280 |
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| 281 | function &SelectLimit($sql,$nrows=-1,$offset=-1,$inputArr=false)
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| 282 | {
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| 283 | $nrows = (integer) $nrows;
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| 284 | if ($offset <= 0) {
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| 285 | // could also use " OPTIMIZE FOR $nrows ROWS "
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| 286 | if ($nrows >= 0) $sql .= " FETCH FIRST $nrows ROWS ONLY ";
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| 287 | $rs =& $this->Execute($sql,$inputArr);
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| 288 | } else {
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| 289 | if ($offset > 0 && $nrows < 0);
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| 290 | else {
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| 291 | $nrows += $offset;
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| 292 | $sql .= " FETCH FIRST $nrows ROWS ONLY ";
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| 293 | }
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| 294 | $rs =& ADOConnection::SelectLimit($sql,-1,$offset,$inputArr);
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| 295 | }
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| 296 |
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| 297 | return $rs;
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| 298 | }
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| 299 |
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| 300 | };
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| 301 |
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| 302 |
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| 303 | class ADORecordSet_odbc_db2 extends ADORecordSet_odbc {
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| 304 |
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| 305 | var $databaseType = "db2";
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| 306 |
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| 307 | function ADORecordSet_db2($id,$mode=false)
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| 308 | {
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| 309 | $this->ADORecordSet_odbc($id,$mode);
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| 310 | }
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| 311 |
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| 312 | function MetaType($t,$len=-1,$fieldobj=false)
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| 313 | {
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| 314 | if (is_object($t)) {
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| 315 | $fieldobj = $t;
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| 316 | $t = $fieldobj->type;
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| 317 | $len = $fieldobj->max_length;
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| 318 | }
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| 319 |
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| 320 | switch (strtoupper($t)) {
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| 321 | case 'VARCHAR':
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| 322 | case 'CHAR':
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| 323 | case 'CHARACTER':
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| 324 | case 'C':
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| 325 | if ($len <= $this->blobSize) return 'C';
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| 326 |
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| 327 | case 'LONGCHAR':
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| 328 | case 'TEXT':
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| 329 | case 'CLOB':
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| 330 | case 'DBCLOB': // double-byte
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| 331 | case 'X':
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| 332 | return 'X';
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| 333 |
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| 334 | case 'BLOB':
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| 335 | case 'GRAPHIC':
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| 336 | case 'VARGRAPHIC':
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| 337 | return 'B';
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| 338 |
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| 339 | case 'DATE':
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| 340 | case 'D':
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| 341 | return 'D';
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| 342 |
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| 343 | case 'TIME':
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| 344 | case 'TIMESTAMP':
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| 345 | case 'T':
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| 346 | return 'T';
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| 347 |
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| 348 | //case 'BOOLEAN':
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| 349 | //case 'BIT':
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| 350 | // return 'L';
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| 351 |
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| 352 | //case 'COUNTER':
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| 353 | // return 'R';
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| 354 |
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| 355 | case 'INT':
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| 356 | case 'INTEGER':
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| 357 | case 'BIGINT':
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| 358 | case 'SMALLINT':
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| 359 | case 'I':
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| 360 | return 'I';
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| 361 |
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| 362 | default: return 'N';
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| 363 | }
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| 364 | }
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| 365 | }
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| 366 |
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| 367 | } //define
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| 368 | ?> |
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