| 1 | <?php |
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| 2 | /* |
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| 3 | V5.18 3 Sep 2012 (c) 2000-2012 John Lim (jlim#natsoft.com). 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,$col='1 as adodbignore') |
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| 138 | { |
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| 139 | if ($this->_autocommit) $this->BeginTrans(); |
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| 140 | return $this->GetOne("select $col 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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