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✏️ Editing: adodb-pdo_sqlite.inc.php

<?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;
	}

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;
	}

/**
	 * Returns a driver-specific format for a bind parameter
	 *
	 * @param string $name
	 * @param string $type (ignored in driver)
	 *
	 * @return string
	 */
	public function param($name,$type='C')
	{
		return sprintf(':%s', $name);
	}
}

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