mirror of
https://github.com/moodle/moodle.git
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435 lines
12 KiB
PHP
435 lines
12 KiB
PHP
<?php
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/*
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@version v5.21.0 2021-02-27
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@copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
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@copyright (c) 2014 Damien Regad, Mark Newnham and the ADOdb community
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Released under both BSD license and Lesser GPL library license.
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Whenever there is any discrepancy between the two licenses,
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the BSD license will take precedence.
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Set tabs to 4 for best viewing.
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Latest version is available at https://adodb.org/
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MSSQL support via ODBC. Requires ODBC. Works on Windows and Unix.
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For Unix configuration, see http://phpbuilder.com/columns/alberto20000919.php3
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*/
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// security - hide paths
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if (!defined('ADODB_DIR')) die();
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if (!defined('_ADODB_ODBC_LAYER')) {
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include_once(ADODB_DIR."/drivers/adodb-odbc.inc.php");
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}
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class ADODB_odbc_mssql extends ADODB_odbc {
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var $databaseType = 'odbc_mssql';
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var $fmtDate = "'Y-m-d'";
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var $fmtTimeStamp = "'Y-m-d\TH:i:s'";
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var $_bindInputArray = true;
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var $metaDatabasesSQL = "select name from sysdatabases where name <> 'master'";
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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'))";
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var $metaColumnsSQL = # xtype==61 is datetime
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"select c.name,t.name,c.length,c.isnullable, c.status,
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(case when c.xusertype=61 then 0 else c.xprec end),
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(case when c.xusertype=61 then 0 else c.xscale end)
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from syscolumns c join systypes t on t.xusertype=c.xusertype join sysobjects o on o.id=c.id where o.name='%s'";
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var $hasTop = 'top'; // support mssql/interbase SELECT TOP 10 * FROM TABLE
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var $sysDate = 'GetDate()';
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var $sysTimeStamp = 'GetDate()';
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var $leftOuter = '*=';
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var $rightOuter = '=*';
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var $substr = 'substring';
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var $length = 'len';
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var $ansiOuter = true; // for mssql7 or later
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var $identitySQL = 'select SCOPE_IDENTITY()'; // 'select SCOPE_IDENTITY'; # for mssql 2000
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var $hasInsertID = true;
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var $connectStmt = 'SET CONCAT_NULL_YIELDS_NULL OFF'; # When SET CONCAT_NULL_YIELDS_NULL is ON,
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# concatenating a null value with a string yields a NULL result
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// crashes php...
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function ServerInfo()
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{
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global $ADODB_FETCH_MODE;
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$save = $ADODB_FETCH_MODE;
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$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
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$row = $this->GetRow("execute sp_server_info 2");
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$ADODB_FETCH_MODE = $save;
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if (!is_array($row)) return false;
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$arr['description'] = $row[2];
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$arr['version'] = ADOConnection::_findvers($arr['description']);
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return $arr;
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}
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function IfNull( $field, $ifNull )
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{
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return " ISNULL($field, $ifNull) "; // if MS SQL Server
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}
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function _insertid()
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{
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// SCOPE_IDENTITY()
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// Returns the last IDENTITY value inserted into an IDENTITY column in
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// the same scope. A scope is a module -- a stored procedure, trigger,
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// function, or batch. Thus, two statements are in the same scope if
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// they are in the same stored procedure, function, or batch.
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return $this->GetOne($this->identitySQL);
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}
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function MetaForeignKeys($table, $owner=false, $upper=false)
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{
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global $ADODB_FETCH_MODE;
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$save = $ADODB_FETCH_MODE;
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$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
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$table = $this->qstr(strtoupper($table));
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$sql =
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"select object_name(constid) as constraint_name,
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col_name(fkeyid, fkey) as column_name,
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object_name(rkeyid) as referenced_table_name,
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col_name(rkeyid, rkey) as referenced_column_name
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from sysforeignkeys
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where upper(object_name(fkeyid)) = $table
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order by constraint_name, referenced_table_name, keyno";
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$constraints = $this->GetArray($sql);
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$ADODB_FETCH_MODE = $save;
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$arr = false;
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foreach($constraints as $constr) {
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//print_r($constr);
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$arr[$constr[0]][$constr[2]][] = $constr[1].'='.$constr[3];
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}
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if (!$arr) return false;
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$arr2 = false;
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foreach($arr as $k => $v) {
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foreach($v as $a => $b) {
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if ($upper) $a = strtoupper($a);
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$arr2[$a] = $b;
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}
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}
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return $arr2;
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}
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function MetaTables($ttype=false,$showSchema=false,$mask=false)
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{
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if ($mask) {//$this->debug=1;
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$save = $this->metaTablesSQL;
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$mask = $this->qstr($mask);
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$this->metaTablesSQL .= " AND name like $mask";
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}
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$ret = ADOConnection::MetaTables($ttype,$showSchema);
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if ($mask) {
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$this->metaTablesSQL = $save;
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}
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return $ret;
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}
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function MetaColumns($table, $normalize=true)
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{
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$this->_findschema($table,$schema);
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if ($schema) {
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$dbName = $this->database;
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$this->SelectDB($schema);
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}
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global $ADODB_FETCH_MODE;
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$save = $ADODB_FETCH_MODE;
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$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
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if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
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$rs = $this->Execute(sprintf($this->metaColumnsSQL,$table));
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if ($schema) {
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$this->SelectDB($dbName);
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}
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if (isset($savem)) $this->SetFetchMode($savem);
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$ADODB_FETCH_MODE = $save;
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if (!is_object($rs)) {
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$false = false;
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return $false;
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}
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$retarr = array();
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while (!$rs->EOF){
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$fld = new ADOFieldObject();
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$fld->name = $rs->fields[0];
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$fld->type = $rs->fields[1];
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$fld->not_null = (!$rs->fields[3]);
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$fld->auto_increment = ($rs->fields[4] == 128); // sys.syscolumns status field. 0x80 = 128 ref: http://msdn.microsoft.com/en-us/library/ms186816.aspx
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if (isset($rs->fields[5]) && $rs->fields[5]) {
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if ($rs->fields[5]>0) $fld->max_length = $rs->fields[5];
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$fld->scale = $rs->fields[6];
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if ($fld->scale>0) $fld->max_length += 1;
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} else
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$fld->max_length = $rs->fields[2];
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if ($save == ADODB_FETCH_NUM) {
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$retarr[] = $fld;
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} else {
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$retarr[strtoupper($fld->name)] = $fld;
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}
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$rs->MoveNext();
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}
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$rs->Close();
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return $retarr;
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}
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function MetaIndexes($table,$primary=false, $owner=false)
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{
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$table = $this->qstr($table);
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$sql = "SELECT i.name AS ind_name, C.name AS col_name, USER_NAME(O.uid) AS Owner, c.colid, k.Keyno,
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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,
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CASE WHEN I.status & 2 = 2 THEN 1 ELSE 0 END AS IsUnique
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FROM dbo.sysobjects o INNER JOIN dbo.sysindexes I ON o.id = i.id
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INNER JOIN dbo.sysindexkeys K ON I.id = K.id AND I.Indid = K.Indid
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INNER JOIN dbo.syscolumns c ON K.id = C.id AND K.colid = C.Colid
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WHERE LEFT(i.name, 8) <> '_WA_Sys_' AND o.status >= 0 AND O.Name LIKE $table
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ORDER BY O.name, I.Name, K.keyno";
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global $ADODB_FETCH_MODE;
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$save = $ADODB_FETCH_MODE;
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$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
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if ($this->fetchMode !== FALSE) {
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$savem = $this->SetFetchMode(FALSE);
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}
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$rs = $this->Execute($sql);
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if (isset($savem)) {
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$this->SetFetchMode($savem);
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}
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$ADODB_FETCH_MODE = $save;
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if (!is_object($rs)) {
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return FALSE;
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}
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$indexes = array();
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while ($row = $rs->FetchRow()) {
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if (!$primary && $row[5]) continue;
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$indexes[$row[0]]['unique'] = $row[6];
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$indexes[$row[0]]['columns'][] = $row[1];
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}
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return $indexes;
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}
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function _query($sql,$inputarr=false)
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{
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if (is_string($sql)) $sql = str_replace('||','+',$sql);
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return ADODB_odbc::_query($sql,$inputarr);
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}
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function SetTransactionMode( $transaction_mode )
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{
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$this->_transmode = $transaction_mode;
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if (empty($transaction_mode)) {
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$this->Execute('SET TRANSACTION ISOLATION LEVEL READ COMMITTED');
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return;
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}
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if (!stristr($transaction_mode,'isolation')) $transaction_mode = 'ISOLATION LEVEL '.$transaction_mode;
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$this->Execute("SET TRANSACTION ".$transaction_mode);
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}
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// "Stein-Aksel Basma" <basma@accelero.no>
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// tested with MSSQL 2000
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function MetaPrimaryKeys($table, $owner = false)
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{
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global $ADODB_FETCH_MODE;
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$schema = '';
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$this->_findschema($table,$schema);
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//if (!$schema) $schema = $this->database;
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if ($schema) $schema = "and k.table_catalog like '$schema%'";
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$sql = "select distinct k.column_name,ordinal_position from information_schema.key_column_usage k,
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information_schema.table_constraints tc
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where tc.constraint_name = k.constraint_name and tc.constraint_type =
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'PRIMARY KEY' and k.table_name = '$table' $schema order by ordinal_position ";
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$savem = $ADODB_FETCH_MODE;
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$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
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$a = $this->GetCol($sql);
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$ADODB_FETCH_MODE = $savem;
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if ($a && sizeof($a)>0) return $a;
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$false = false;
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return $false;
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}
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function SelectLimit($sql,$nrows=-1,$offset=-1, $inputarr=false,$secs2cache=0)
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{
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$nrows = (int) $nrows;
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$offset = (int) $offset;
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if ($nrows > 0 && $offset <= 0) {
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$sql = preg_replace(
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'/(^\s*select\s+(distinctrow|distinct)?)/i','\\1 '.$this->hasTop." $nrows ",$sql);
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$rs = $this->Execute($sql,$inputarr);
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} else
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$rs = ADOConnection::SelectLimit($sql,$nrows,$offset,$inputarr,$secs2cache);
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return $rs;
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}
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// Format date column in sql string given an input format that understands Y M D
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function SQLDate($fmt, $col=false)
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{
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if (!$col) $col = $this->sysTimeStamp;
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$s = '';
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$len = strlen($fmt);
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for ($i=0; $i < $len; $i++) {
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if ($s) $s .= '+';
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$ch = $fmt[$i];
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switch($ch) {
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case 'Y':
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case 'y':
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$s .= "datename(yyyy,$col)";
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break;
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case 'M':
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$s .= "convert(char(3),$col,0)";
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break;
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case 'm':
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$s .= "replace(str(month($col),2),' ','0')";
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break;
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case 'Q':
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case 'q':
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$s .= "datename(quarter,$col)";
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break;
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case 'D':
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case 'd':
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$s .= "replace(str(day($col),2),' ','0')";
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break;
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case 'h':
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$s .= "substring(convert(char(14),$col,0),13,2)";
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break;
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case 'H':
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$s .= "replace(str(datepart(hh,$col),2),' ','0')";
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break;
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case 'i':
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$s .= "replace(str(datepart(mi,$col),2),' ','0')";
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break;
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case 's':
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$s .= "replace(str(datepart(ss,$col),2),' ','0')";
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break;
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case 'a':
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case 'A':
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$s .= "substring(convert(char(19),$col,0),18,2)";
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break;
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default:
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if ($ch == '\\') {
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$i++;
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$ch = substr($fmt,$i,1);
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}
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$s .= $this->qstr($ch);
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break;
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}
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}
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return $s;
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}
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/**
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* Returns a substring of a varchar type field
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*
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* The SQL server version varies because the length is mandatory, so
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* we append a reasonable string length
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*
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* @param string $fld The field to sub-string
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* @param int $start The start point
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* @param int $length An optional length
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*
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* @return The SQL text
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*/
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function substr($fld,$start,$length=0)
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{
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if ($length == 0)
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/*
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* The length available to varchar is 2GB, but that makes no
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* sense in a substring, so I'm going to arbitrarily limit
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* the length to 1K, but you could change it if you want
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*/
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$length = 1024;
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$text = "SUBSTRING($fld,$start,$length)";
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return $text;
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}
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/**
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* Returns the maximum size of a MetaType C field. Because of the
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* database design, SQL Server places no limits on the size of data inserted
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* Although the actual limit is 2^31-1 bytes.
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*
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* @return int
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*/
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function charMax()
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{
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return ADODB_STRINGMAX_NOLIMIT;
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}
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/**
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* Returns the maximum size of a MetaType X field. Because of the
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* database design, SQL Server places no limits on the size of data inserted
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* Although the actual limit is 2^31-1 bytes.
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*
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* @return int
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*/
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function textMax()
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{
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return ADODB_STRINGMAX_NOLIMIT;
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}
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// returns concatenated string
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// MSSQL requires integers to be cast as strings
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// automatically cast every datatype to VARCHAR(255)
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// @author David Rogers (introspectshun)
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function Concat()
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{
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$s = "";
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$arr = func_get_args();
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// Split single record on commas, if possible
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if (sizeof($arr) == 1) {
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foreach ($arr as $arg) {
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$args = explode(',', $arg);
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}
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$arr = $args;
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}
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array_walk(
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$arr,
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function(&$value, $key) {
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$value = "CAST(" . $value . " AS VARCHAR(255))";
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}
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);
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$s = implode('+',$arr);
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if (sizeof($arr) > 0) return "$s";
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return '';
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}
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}
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class ADORecordSet_odbc_mssql extends ADORecordSet_odbc {
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var $databaseType = 'odbc_mssql';
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}
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