Proyectos de Subversion Moodle

<?php
/**
 * MSSQL driver via ODBC
 *
 * This file is part of ADOdb, a Database Abstraction Layer library for PHP.
 *
 * @package ADOdb
 * @link https://adodb.org Project's web site and documentation
 * @link https://github.com/ADOdb/ADOdb Source code and issue tracker
 *
 * The ADOdb Library is dual-licensed, released under both the BSD 3-Clause
 * and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,
 * any later version. This means you can use it in proprietary products.
 * See the LICENSE.md file distributed with this source code for details.
 * @license BSD-3-Clause
 * @license LGPL-2.1-or-later
 *
 * @copyright 2000-2013 John Lim
 * @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community
 */

// security - hide paths
if (!defined('ADODB_DIR')) die();

if (!defined('_ADODB_ODBC_LAYER')) {
        include_once(ADODB_DIR."/drivers/adodb-odbc.inc.php");
}


class  ADODB_odbc_mssql extends ADODB_odbc {
        var $databaseType = 'odbc_mssql';
        var $fmtDate = "'Y-m-d'";
        var $fmtTimeStamp = "'Y-m-d\TH:i:s'";
        var $_bindInputArray = true;
        var $metaDatabasesSQL = "select name from sysdatabases where name <> 'master'";
        var $metaTablesSQL="select name,case when type='U' then 'T' else 'V' end from sysobjects where (type='U' or type='V') and (name not in ('sysallocations','syscolumns','syscomments','sysdepends','sysfilegroups','sysfiles','sysfiles1','sysforeignkeys','sysfulltextcatalogs','sysindexes','sysindexkeys','sysmembers','sysobjects','syspermissions','sysprotects','sysreferences','systypes','sysusers','sysalternates','sysconstraints','syssegments','REFERENTIAL_CONSTRAINTS','CHECK_CONSTRAINTS','CONSTRAINT_TABLE_USAGE','CONSTRAINT_COLUMN_USAGE','VIEWS','VIEW_TABLE_USAGE','VIEW_COLUMN_USAGE','SCHEMATA','TABLES','TABLE_CONSTRAINTS','TABLE_PRIVILEGES','COLUMNS','COLUMN_DOMAIN_USAGE','COLUMN_PRIVILEGES','DOMAINS','DOMAIN_CONSTRAINTS','KEY_COLUMN_USAGE'))";
        var $metaColumnsSQL = # xtype==61 is datetime
        "select c.name,t.name,c.length,c.isnullable, c.status,
                (case when c.xusertype=61 then 0 else c.xprec end),
                (case when c.xusertype=61 then 0 else c.xscale end)
                from syscolumns c join systypes t on t.xusertype=c.xusertype join sysobjects o on o.id=c.id where o.name='%s'";
        var $hasTop = 'top';            // support mssql/interbase SELECT TOP 10 * FROM TABLE
        var $sysDate = 'GetDate()';
        var $sysTimeStamp = 'GetDate()';
        var $leftOuter = '*=';
        var $rightOuter = '=*';
        var $substr = 'substring';
        var $length = 'len';
        var $ansiOuter = true; // for mssql7 or later
        var $identitySQL = 'select SCOPE_IDENTITY()'; // 'select SCOPE_IDENTITY'; # for mssql 2000
        var $hasInsertID = true;
        /**
         * When SET CONCAT_NULL_YIELDS_NULL is ON, concatenating a null value with
         * a string yields a NULL result.
         * @var string SQL statement executed after successful connection.
         */
        public $connectStmt = 'SET CONCAT_NULL_YIELDS_NULL OFF'; #

        // crashes php...
        function ServerInfo()
        {
        global $ADODB_FETCH_MODE;
                $save = $ADODB_FETCH_MODE;
                $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
                $row = $this->GetRow("execute sp_server_info 2");
                $ADODB_FETCH_MODE = $save;
                if (!is_array($row)) return false;
                $arr['description'] = $row[2];
                $arr['version'] = ADOConnection::_findvers($arr['description']);
                return $arr;
        }

        function IfNull( $field, $ifNull )
        {
                return " ISNULL($field, $ifNull) "; // if MS SQL Server
        }

        protected function _insertID($table = '', $column = '')
        {
        // SCOPE_IDENTITY()
        // Returns the last IDENTITY value inserted into an IDENTITY column in
        // the same scope. A scope is a module -- a stored procedure, trigger,
        // function, or batch. Thus, two statements are in the same scope if
        // they are in the same stored procedure, function, or batch.
                        return $this->GetOne($this->identitySQL);
        }

        public function metaForeignKeys($table, $owner = '', $upper = false, $associative = false)
        {
        global $ADODB_FETCH_MODE;

                $save = $ADODB_FETCH_MODE;
                $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
                $table = $this->qstr(strtoupper($table));

                $sql =
"select object_name(constid) as constraint_name,
        col_name(fkeyid, fkey) as column_name,
        object_name(rkeyid) as referenced_table_name,
        col_name(rkeyid, rkey) as referenced_column_name
from sysforeignkeys
where upper(object_name(fkeyid)) = $table
order by constraint_name, referenced_table_name, keyno";

                $constraints = $this->GetArray($sql);

                $ADODB_FETCH_MODE = $save;

                $arr = false;
                foreach($constraints as $constr) {
                        //print_r($constr);
                        $arr[$constr[0]][$constr[2]][] = $constr[1].'='.$constr[3];
                }
                if (!$arr) return false;

                $arr2 = false;

                foreach($arr as $k => $v) {
                        foreach($v as $a => $b) {
                                if ($upper) $a = strtoupper($a);
                                $arr2[$a] = $b;
                        }
                }
                return $arr2;
        }

        function MetaTables($ttype=false,$showSchema=false,$mask=false)
        {
                if ($mask) {//$this->debug=1;
                        $save = $this->metaTablesSQL;
                        $mask = $this->qstr($mask);
                        $this->metaTablesSQL .= " AND name like $mask";
                }
                $ret = ADOConnection::MetaTables($ttype,$showSchema);

                if ($mask) {
                        $this->metaTablesSQL = $save;
                }
                return $ret;
        }

        function MetaColumns($table, $normalize=true)
        {

                $this->_findschema($table,$schema);
                if ($schema) {
                        $dbName = $this->database;
                        $this->SelectDB($schema);
                }
                global $ADODB_FETCH_MODE;
                $save = $ADODB_FETCH_MODE;
                $ADODB_FETCH_MODE = ADODB_FETCH_NUM;

                if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
                $rs = $this->Execute(sprintf($this->metaColumnsSQL,$table));

                if ($schema) {
                        $this->SelectDB($dbName);
                }

                if (isset($savem)) $this->SetFetchMode($savem);
                $ADODB_FETCH_MODE = $save;
                if (!is_object($rs)) {
                        $false = false;
                        return $false;
                }

                $retarr = array();
                while (!$rs->EOF){
                        $fld = new ADOFieldObject();
                        $fld->name = $rs->fields[0];
                        $fld->type = $rs->fields[1];

                        $fld->not_null = (!$rs->fields[3]);
                        $fld->auto_increment = ($rs->fields[4] == 128);         // sys.syscolumns status field. 0x80 = 128 ref: http://msdn.microsoft.com/en-us/library/ms186816.aspx


                        if (isset($rs->fields[5]) && $rs->fields[5]) {
                                if ($rs->fields[5]>0) $fld->max_length = $rs->fields[5];
                                $fld->scale = $rs->fields[6];
                                if ($fld->scale>0) $fld->max_length += 1;
                        } else
                                $fld->max_length = $rs->fields[2];


                        if ($save == ADODB_FETCH_NUM) {
                                $retarr[] = $fld;
                        } else {
                                $retarr[strtoupper($fld->name)] = $fld;
                        }
                                $rs->MoveNext();
                        }

                        $rs->Close();
                        return $retarr;

        }


        function MetaIndexes($table,$primary=false, $owner=false)
        {
                $table = $this->qstr($table);

                $sql = "SELECT i.name AS ind_name, C.name AS col_name, USER_NAME(O.uid) AS Owner, c.colid, k.Keyno,
                        CASE WHEN I.indid BETWEEN 1 AND 254 AND (I.status & 2048 = 2048 OR I.Status = 16402 AND O.XType = 'V') THEN 1 ELSE 0 END AS IsPK,
                        CASE WHEN I.status & 2 = 2 THEN 1 ELSE 0 END AS IsUnique
                        FROM dbo.sysobjects o INNER JOIN dbo.sysindexes I ON o.id = i.id
                        INNER JOIN dbo.sysindexkeys K ON I.id = K.id AND I.Indid = K.Indid
                        INNER JOIN dbo.syscolumns c ON K.id = C.id AND K.colid = C.Colid
                        WHERE LEFT(i.name, 8) <> '_WA_Sys_' AND o.status >= 0 AND O.Name LIKE $table
                        ORDER BY O.name, I.Name, K.keyno";

                global $ADODB_FETCH_MODE;
                $save = $ADODB_FETCH_MODE;
        $ADODB_FETCH_MODE = ADODB_FETCH_NUM;
        if ($this->fetchMode !== FALSE) {
                $savem = $this->SetFetchMode(FALSE);
        }

        $rs = $this->Execute($sql);
        if (isset($savem)) {
                $this->SetFetchMode($savem);
        }
        $ADODB_FETCH_MODE = $save;

        if (!is_object($rs)) {
                return FALSE;
        }

                $indexes = array();
                while ($row = $rs->FetchRow()) {
                        if (!$primary && $row[5]) continue;

            $indexes[$row[0]]['unique'] = $row[6];
            $indexes[$row[0]]['columns'][] = $row[1];
        }
        return $indexes;
        }

        function _query($sql,$inputarr=false)
        {
                if (is_string($sql)) $sql = str_replace('||','+',$sql);
                return ADODB_odbc::_query($sql,$inputarr);
        }

        function SetTransactionMode( $transaction_mode )
        {
                $this->_transmode  = $transaction_mode;
                if (empty($transaction_mode)) {
                        $this->Execute('SET TRANSACTION ISOLATION LEVEL READ COMMITTED');
                        return;
                }
                if (!stristr($transaction_mode,'isolation')) $transaction_mode = 'ISOLATION LEVEL '.$transaction_mode;
                $this->Execute("SET TRANSACTION ".$transaction_mode);
        }

        // "Stein-Aksel Basma" <basma@accelero.no>
        // tested with MSSQL 2000
        function MetaPrimaryKeys($table, $owner = false)
        {
        global $ADODB_FETCH_MODE;

                $schema = '';
                $this->_findschema($table,$schema);
                //if (!$schema) $schema = $this->database;
                if ($schema) $schema = "and k.table_catalog like '$schema%'";

                $sql = "select distinct k.column_name,ordinal_position from information_schema.key_column_usage k,
                information_schema.table_constraints tc
                where tc.constraint_name = k.constraint_name and tc.constraint_type =
                'PRIMARY KEY' and k.table_name = '$table' $schema order by ordinal_position ";

                $savem = $ADODB_FETCH_MODE;
                $ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
                $a = $this->GetCol($sql);
                $ADODB_FETCH_MODE = $savem;

                if ($a && sizeof($a)>0) return $a;
                $false = false;
                return $false;
        }

        function SelectLimit($sql,$nrows=-1,$offset=-1, $inputarr=false,$secs2cache=0)
        {
                $nrows = (int) $nrows;
                $offset = (int) $offset;
                if ($nrows > 0 && $offset <= 0) {
                        $sql = preg_replace(
                                '/(^\s*select\s+(distinctrow|distinct)?)/i','\\1 '.$this->hasTop." $nrows ",$sql);
                        $rs = $this->Execute($sql,$inputarr);
                } else
                        $rs = ADOConnection::SelectLimit($sql,$nrows,$offset,$inputarr,$secs2cache);

                return $rs;
        }

        // Format date column in sql string given an input format that understands Y M D
        function SQLDate($fmt, $col=false)
        {
                if (!$col) $col = $this->sysTimeStamp;
                $s = '';

                $len = strlen($fmt);
                for ($i=0; $i < $len; $i++) {
                        if ($s) $s .= '+';
                        $ch = $fmt[$i];
                        switch($ch) {
                        case 'Y':
                        case 'y':
                                $s .= "datename(yyyy,$col)";
                                break;
                        case 'M':
                                $s .= "convert(char(3),$col,0)";
                                break;
                        case 'm':
                                $s .= "replace(str(month($col),2),' ','0')";
                                break;
                        case 'Q':
                        case 'q':
                                $s .= "datename(quarter,$col)";
                                break;
                        case 'D':
                        case 'd':
                                $s .= "replace(str(day($col),2),' ','0')";
                                break;
                        case 'h':
                                $s .= "substring(convert(char(14),$col,0),13,2)";
                                break;

                        case 'H':
                                $s .= "replace(str(datepart(hh,$col),2),' ','0')";
                                break;

                        case 'i':
                                $s .= "replace(str(datepart(mi,$col),2),' ','0')";
                                break;
                        case 's':
                                $s .= "replace(str(datepart(ss,$col),2),' ','0')";
                                break;
                        case 'a':
                        case 'A':
                                $s .= "substring(convert(char(19),$col,0),18,2)";
                                break;

                        default:
                                if ($ch == '\\') {
                                        $i++;
                                        $ch = substr($fmt,$i,1);
                                }
                                $s .= $this->qstr($ch);
                                break;
                        }
                }
                return $s;
        }

        /**
        * Returns a substring of a varchar type field
        *
        * The SQL server version varies because the length is mandatory, so
        * we append a reasonable string length
        *
        * @param        string  $fld    The field to sub-string
        * @param        int             $start  The start point
        * @param        int             $length An optional length
        *
        * @return       The SQL text
        */
        function substr($fld,$start,$length=0)
        {
                if ($length == 0)
                        /*
                     * The length available to varchar is 2GB, but that makes no
                         * sense in a substring, so I'm going to arbitrarily limit
                         * the length to 1K, but you could change it if you want
                         */
                        $length = 1024;

                $text = "SUBSTRING($fld,$start,$length)";
                return $text;
        }

        /**
        * Returns the maximum size of a MetaType C field. Because of the
        * database design, SQL Server places no limits on the size of data inserted
        * Although the actual limit is 2^31-1 bytes.
        *
        * @return int
        */
        function charMax()
        {
                return ADODB_STRINGMAX_NOLIMIT;
        }

        /**
        * Returns the maximum size of a MetaType X field. Because of the
        * database design, SQL Server places no limits on the size of data inserted
        * Although the actual limit is 2^31-1 bytes.
        *
        * @return int
        */
        function textMax()
        {
                return ADODB_STRINGMAX_NOLIMIT;
        }

        // returns concatenated string
        // MSSQL requires integers to be cast as strings
        // automatically cast every datatype to VARCHAR(255)
        // @author David Rogers (introspectshun)
        function Concat()
        {
                $s = "";
                $arr = func_get_args();

                // Split single record on commas, if possible
                if (sizeof($arr) == 1) {
                        foreach ($arr as $arg) {
                                $args = explode(',', $arg);
                        }
                        $arr = $args;
                }

                array_walk(
                        $arr,
                        function(&$value, $key) {
                                $value = "CAST(" . $value . " AS VARCHAR(255))";
                        }
                );
                $s = implode('+',$arr);
                if (sizeof($arr) > 0) return "$s";

                return '';
        }

}

class  ADORecordSet_odbc_mssql extends ADORecordSet_odbc {

        var $databaseType = 'odbc_mssql';

}