398 lines
10 KiB
PHP
398 lines
10 KiB
PHP
<?php
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/*
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V5.06 16 Oct 2008 (c) 2000-2008 John Lim (jlim#natsoft.com). All rights reserved.
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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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Latest version is available at http://adodb.sourceforge.net
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SQLite info: http://www.hwaci.com/sw/sqlite/
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Install Instructions:
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====================
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1. Place this in adodb/drivers
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2. Rename the file, remove the .txt prefix.
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*/
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// security - hide paths
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if (!defined('ADODB_DIR')) die();
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class ADODB_sqlite extends ADOConnection {
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var $databaseType = "sqlite";
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var $replaceQuote = "''"; // string to use to replace quotes
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var $concat_operator='||';
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var $_errorNo = 0;
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var $hasLimit = true;
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var $hasInsertID = true; /// supports autoincrement ID?
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var $hasAffectedRows = true; /// supports affected rows for update/delete?
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var $metaTablesSQL = "SELECT name FROM sqlite_master WHERE type='table' ORDER BY name";
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var $sysDate = "adodb_date('Y-m-d')";
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var $sysTimeStamp = "adodb_date('Y-m-d H:i:s')";
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var $fmtTimeStamp = "'Y-m-d H:i:s'";
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function ADODB_sqlite()
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{
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}
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/*
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function __get($name)
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{
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switch($name) {
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case 'sysDate': return "'".date($this->fmtDate)."'";
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case 'sysTimeStamp' : return "'".date($this->sysTimeStamp)."'";
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}
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}*/
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function ServerInfo()
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{
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$arr['version'] = sqlite_libversion();
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$arr['description'] = 'SQLite ';
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$arr['encoding'] = sqlite_libencoding();
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return $arr;
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}
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function BeginTrans()
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{
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if ($this->transOff) return true;
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$ret = $this->Execute("BEGIN TRANSACTION");
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$this->transCnt += 1;
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return true;
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}
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function CommitTrans($ok=true)
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{
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if ($this->transOff) return true;
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if (!$ok) return $this->RollbackTrans();
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$ret = $this->Execute("COMMIT");
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if ($this->transCnt>0)$this->transCnt -= 1;
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return !empty($ret);
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}
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function RollbackTrans()
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{
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if ($this->transOff) return true;
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$ret = $this->Execute("ROLLBACK");
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if ($this->transCnt>0)$this->transCnt -= 1;
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return !empty($ret);
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}
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// mark newnham
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function MetaColumns($tab)
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{
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global $ADODB_FETCH_MODE;
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$false = false;
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$save = $ADODB_FETCH_MODE;
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$ADODB_FETCH_MODE = ADODB_FETCH_ASSOC;
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if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
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$rs = $this->Execute("PRAGMA table_info('$tab')");
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if (isset($savem)) $this->SetFetchMode($savem);
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if (!$rs) {
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$ADODB_FETCH_MODE = $save;
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return $false;
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}
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$arr = array();
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while ($r = $rs->FetchRow()) {
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$type = explode('(',$r['type']);
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$size = '';
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if (sizeof($type)==2)
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$size = trim($type[1],')');
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$fn = strtoupper($r['name']);
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$fld = new ADOFieldObject;
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$fld->name = $r['name'];
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$fld->type = $type[0];
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$fld->max_length = $size;
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$fld->not_null = $r['notnull'];
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$fld->default_value = $r['dflt_value'];
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$fld->scale = 0;
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if ($save == ADODB_FETCH_NUM) $arr[] = $fld;
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else $arr[strtoupper($fld->name)] = $fld;
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}
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$rs->Close();
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$ADODB_FETCH_MODE = $save;
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return $arr;
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}
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function _init($parentDriver)
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{
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$parentDriver->hasTransactions = false;
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$parentDriver->hasInsertID = true;
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}
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function _insertid()
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{
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return sqlite_last_insert_rowid($this->_connectionID);
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}
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function _affectedrows()
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{
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return sqlite_changes($this->_connectionID);
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}
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function ErrorMsg()
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{
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if ($this->_logsql) return $this->_errorMsg;
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return ($this->_errorNo) ? sqlite_error_string($this->_errorNo) : '';
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}
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function ErrorNo()
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{
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return $this->_errorNo;
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}
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function SQLDate($fmt, $col=false)
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{
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$fmt = $this->qstr($fmt);
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return ($col) ? "adodb_date2($fmt,$col)" : "adodb_date($fmt)";
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}
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function _createFunctions()
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{
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@sqlite_create_function($this->_connectionID, 'adodb_date', 'adodb_date', 1);
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@sqlite_create_function($this->_connectionID, 'adodb_date2', 'adodb_date2', 2);
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}
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// returns true or false
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function _connect($argHostname, $argUsername, $argPassword, $argDatabasename)
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{
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if (!function_exists('sqlite_open')) return null;
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if (empty($argHostname) && $argDatabasename) $argHostname = $argDatabasename;
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$this->_connectionID = sqlite_open($argHostname);
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if ($this->_connectionID === false) return false;
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$this->_createFunctions();
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return true;
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}
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// returns true or false
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function _pconnect($argHostname, $argUsername, $argPassword, $argDatabasename)
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{
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if (!function_exists('sqlite_open')) return null;
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if (empty($argHostname) && $argDatabasename) $argHostname = $argDatabasename;
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$this->_connectionID = sqlite_popen($argHostname);
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if ($this->_connectionID === false) return false;
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$this->_createFunctions();
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return true;
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}
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// returns query ID if successful, otherwise false
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function _query($sql,$inputarr=false)
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{
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$rez = sqlite_query($sql,$this->_connectionID);
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if (!$rez) {
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$this->_errorNo = sqlite_last_error($this->_connectionID);
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}
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return $rez;
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}
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function SelectLimit($sql,$nrows=-1,$offset=-1,$inputarr=false,$secs2cache=0)
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{
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$offsetStr = ($offset >= 0) ? " OFFSET $offset" : '';
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$limitStr = ($nrows >= 0) ? " LIMIT $nrows" : ($offset >= 0 ? ' LIMIT 999999999' : '');
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if ($secs2cache)
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$rs = $this->CacheExecute($secs2cache,$sql."$limitStr$offsetStr",$inputarr);
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else
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$rs = $this->Execute($sql."$limitStr$offsetStr",$inputarr);
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return $rs;
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}
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/*
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This algorithm is not very efficient, but works even if table locking
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is not available.
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Will return false if unable to generate an ID after $MAXLOOPS attempts.
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*/
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var $_genSeqSQL = "create table %s (id integer)";
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function GenID($seq='adodbseq',$start=1)
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{
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// if you have to modify the parameter below, your database is overloaded,
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// or you need to implement generation of id's yourself!
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$MAXLOOPS = 100;
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//$this->debug=1;
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while (--$MAXLOOPS>=0) {
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@($num = $this->GetOne("select id from $seq"));
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if ($num === false) {
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$this->Execute(sprintf($this->_genSeqSQL ,$seq));
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$start -= 1;
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$num = '0';
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$ok = $this->Execute("insert into $seq values($start)");
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if (!$ok) return false;
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}
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$this->Execute("update $seq set id=id+1 where id=$num");
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if ($this->affected_rows() > 0) {
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$num += 1;
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$this->genID = $num;
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return $num;
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}
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}
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if ($fn = $this->raiseErrorFn) {
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$fn($this->databaseType,'GENID',-32000,"Unable to generate unique id after $MAXLOOPS attempts",$seq,$num);
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}
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return false;
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}
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function CreateSequence($seqname='adodbseq',$start=1)
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{
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if (empty($this->_genSeqSQL)) return false;
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$ok = $this->Execute(sprintf($this->_genSeqSQL,$seqname));
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if (!$ok) return false;
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$start -= 1;
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return $this->Execute("insert into $seqname values($start)");
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}
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var $_dropSeqSQL = 'drop table %s';
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function DropSequence($seqname)
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{
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if (empty($this->_dropSeqSQL)) return false;
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return $this->Execute(sprintf($this->_dropSeqSQL,$seqname));
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}
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// returns true or false
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function _close()
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{
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return @sqlite_close($this->_connectionID);
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}
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function MetaIndexes($table, $primary = FALSE, $owner=false)
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{
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$false = false;
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// save old fetch mode
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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 = $this->SetFetchMode(FALSE);
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}
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$SQL=sprintf("SELECT name,sql FROM sqlite_master WHERE type='index' AND tbl_name='%s'", strtolower($table));
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$rs = $this->Execute($SQL);
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if (!is_object($rs)) {
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if (isset($savem))
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$this->SetFetchMode($savem);
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$ADODB_FETCH_MODE = $save;
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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 && preg_match("/primary/i",$row[1]) == 0) continue;
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if (!isset($indexes[$row[0]])) {
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$indexes[$row[0]] = array(
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'unique' => preg_match("/unique/i",$row[1]),
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'columns' => array());
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}
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/**
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* There must be a more elegant way of doing this,
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* the index elements appear in the SQL statement
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* in cols[1] between parentheses
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* e.g CREATE UNIQUE INDEX ware_0 ON warehouse (org,warehouse)
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*/
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$cols = explode("(",$row[1]);
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$cols = explode(")",$cols[1]);
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array_pop($cols);
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$indexes[$row[0]]['columns'] = $cols;
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}
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if (isset($savem)) {
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$this->SetFetchMode($savem);
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$ADODB_FETCH_MODE = $save;
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}
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return $indexes;
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}
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}
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/*--------------------------------------------------------------------------------------
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Class Name: Recordset
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--------------------------------------------------------------------------------------*/
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class ADORecordset_sqlite extends ADORecordSet {
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var $databaseType = "sqlite";
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var $bind = false;
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function ADORecordset_sqlite($queryID,$mode=false)
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{
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if ($mode === false) {
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global $ADODB_FETCH_MODE;
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$mode = $ADODB_FETCH_MODE;
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}
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switch($mode) {
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case ADODB_FETCH_NUM: $this->fetchMode = SQLITE_NUM; break;
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case ADODB_FETCH_ASSOC: $this->fetchMode = SQLITE_ASSOC; break;
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default: $this->fetchMode = SQLITE_BOTH; break;
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}
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$this->adodbFetchMode = $mode;
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$this->_queryID = $queryID;
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$this->_inited = true;
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$this->fields = array();
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if ($queryID) {
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$this->_currentRow = 0;
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$this->EOF = !$this->_fetch();
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@$this->_initrs();
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} else {
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$this->_numOfRows = 0;
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$this->_numOfFields = 0;
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$this->EOF = true;
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}
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return $this->_queryID;
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}
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function FetchField($fieldOffset = -1)
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{
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$fld = new ADOFieldObject;
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$fld->name = sqlite_field_name($this->_queryID, $fieldOffset);
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$fld->type = 'VARCHAR';
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$fld->max_length = -1;
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return $fld;
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}
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function _initrs()
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{
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$this->_numOfRows = @sqlite_num_rows($this->_queryID);
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$this->_numOfFields = @sqlite_num_fields($this->_queryID);
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}
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function Fields($colname)
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{
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if ($this->fetchMode != SQLITE_NUM) return $this->fields[$colname];
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if (!$this->bind) {
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$this->bind = array();
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for ($i=0; $i < $this->_numOfFields; $i++) {
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$o = $this->FetchField($i);
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$this->bind[strtoupper($o->name)] = $i;
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}
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}
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return $this->fields[$this->bind[strtoupper($colname)]];
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}
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function _seek($row)
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{
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return sqlite_seek($this->_queryID, $row);
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}
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function _fetch($ignore_fields=false)
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{
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$this->fields = @sqlite_fetch_array($this->_queryID,$this->fetchMode);
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return !empty($this->fields);
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}
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function _close()
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{
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}
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}
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?>
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