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<?php
/**
* PDO SQLite driver
*
* 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
* @author Diogo Toscano <diogo@scriptcase.net>
* @author Sid Dunayer <sdunayer@interserv.com>
*/
class ADODB_pdo_sqlite extends ADODB_pdo {
var $metaTablesSQL = "SELECT name FROM sqlite_master WHERE type='table'";
var $sysDate = 'current_date';
var $sysTimeStamp = 'current_timestamp';
var $nameQuote = '`';
var $replaceQuote = "''";
var $hasGenID = true;
var $_genIDSQL = "UPDATE %s SET id=id+1 WHERE id=%s";
var $_genSeqSQL = "CREATE TABLE %s (id integer)";
var $_genSeqCountSQL = 'SELECT COUNT(*) FROM %s';
var $_genSeq2SQL = 'INSERT INTO %s VALUES(%s)';
var $_dropSeqSQL = 'DROP TABLE %s';
var $concat_operator = '||';
var $pdoDriver = false;
var $random='abs(random())';
function _init($parentDriver)
{
$this->pdoDriver = $parentDriver;
$parentDriver->_bindInputArray = true;
$parentDriver->hasTransactions = false; // // should be set to false because of PDO SQLite driver not supporting changing autocommit mode
$parentDriver->hasInsertID = true;
}
function ServerInfo()
{
$parent = $this->pdoDriver;
@($ver = array_pop($parent->GetCol("SELECT sqlite_version()")));
@($enc = array_pop($parent->GetCol("PRAGMA encoding")));
$arr['version'] = $ver;
$arr['description'] = 'SQLite ';
$arr['encoding'] = $enc;
return $arr;
}
function SelectLimit($sql,$nrows=-1,$offset=-1,$inputarr=false,$secs2cache=0)
{
$nrows = (int) $nrows;
$offset = (int) $offset;
$parent = $this->pdoDriver;
$offsetStr = ($offset >= 0) ? " OFFSET $offset" : '';
$limitStr = ($nrows >= 0) ? " LIMIT $nrows" : ($offset >= 0 ? ' LIMIT 999999999' : '');
if ($secs2cache)
$rs = $parent->CacheExecute($secs2cache,$sql."$limitStr$offsetStr",$inputarr);
else
$rs = $parent->Execute($sql."$limitStr$offsetStr",$inputarr);
return $rs;
}
function GenID($seq='adodbseq',$start=1)
{
$parent = $this->pdoDriver;
// if you have to modify the parameter below, your database is overloaded,
// or you need to implement generation of id's yourself!
$MAXLOOPS = 100;
while (--$MAXLOOPS>=0) {
@($num = array_pop($parent->GetCol("SELECT id FROM {$seq}")));
if ($num === false || !is_numeric($num)) {
@$parent->Execute(sprintf($this->_genSeqSQL ,$seq));
$start -= 1;
$num = '0';
$cnt = $parent->GetOne(sprintf($this->_genSeqCountSQL,$seq));
if (!$cnt) {
$ok = $parent->Execute(sprintf($this->_genSeq2SQL,$seq,$start));
}
if (!$ok) return false;
}
$parent->Execute(sprintf($this->_genIDSQL,$seq,$num));
if ($parent->affected_rows() > 0) {
$num += 1;
$parent->genID = intval($num);
return intval($num);
}
}
if ($fn = $parent->raiseErrorFn) {
$fn($parent->databaseType,'GENID',-32000,"Unable to generate unique id after $MAXLOOPS attempts",$seq,$num);
}
return false;
}
function CreateSequence($seqname='adodbseq',$start=1)
{
$parent = $this->pdoDriver;
$ok = $parent->Execute(sprintf($this->_genSeqSQL,$seqname));
if (!$ok) return false;
$start -= 1;
return $parent->Execute("insert into $seqname values($start)");
}
function SetTransactionMode($transaction_mode)
{
$parent = $this->pdoDriver;
$parent->_transmode = strtoupper($transaction_mode);
}
function BeginTrans()
{
$parent = $this->pdoDriver;
if ($parent->transOff) return true;
$parent->transCnt += 1;
$parent->_autocommit = false;
return $parent->Execute("BEGIN {$parent->_transmode}");
}
function CommitTrans($ok=true)
{
$parent = $this->pdoDriver;
if ($parent->transOff) return true;
if (!$ok) return $parent->RollbackTrans();
if ($parent->transCnt) $parent->transCnt -= 1;
$parent->_autocommit = true;
$ret = $parent->Execute('COMMIT');
return $ret;
}
function RollbackTrans()
{
$parent = $this->pdoDriver;
if ($parent->transOff) return true;
if ($parent->transCnt) $parent->transCnt -= 1;
$parent->_autocommit = true;
$ret = $parent->Execute('ROLLBACK');
return $ret;
}
// mark newnham
function MetaColumns($tab,$normalize=true)
{
global $ADODB_FETCH_MODE;
$parent = $this->pdoDriver;
$false = false;
$save = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
if ($parent->fetchMode !== false) $savem = $parent->SetFetchMode(false);
$rs = $parent->Execute("PRAGMA table_info('$tab')");
if (isset($savem)) $parent->SetFetchMode($savem);
if (!$rs) {
$ADODB_FETCH_MODE = $save;
return $false;
}
$arr = array();
while ($r = $rs->FetchRow()) {
$type = explode('(',$r['type']);
$size = '';
if (sizeof($type)==2)
$size = trim($type[1],')');
$fn = strtoupper($r['name']);
$fld = new ADOFieldObject;
$fld->name = $r['name'];
$fld->type = $type[0];
$fld->max_length = $size;
$fld->not_null = $r['notnull'];
$fld->primary_key = $r['pk'];
$fld->default_value = $r['dflt_value'];
$fld->scale = 0;
if ($save == ADODB_FETCH_NUM) $arr[] = $fld;
else $arr[strtoupper($fld->name)] = $fld;
}
$rs->Close();
$ADODB_FETCH_MODE = $save;
return $arr;
}
function MetaTables($ttype=false,$showSchema=false,$mask=false)
{
$parent = $this->pdoDriver;
if ($mask) {
$save = $this->metaTablesSQL;
$mask = $this->qstr(strtoupper($mask));
$this->metaTablesSQL .= " AND name LIKE $mask";
}
$ret = $parent->GetCol($this->metaTablesSQL);
if ($mask) {
$this->metaTablesSQL = $save;
}
return $ret;
}
}
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