397 lines
10 KiB
PHP
397 lines
10 KiB
PHP
<?php
|
|
|
|
/**
|
|
* This file is part of CodeIgniter 4 framework.
|
|
*
|
|
* (c) CodeIgniter Foundation <admin@codeigniter.com>
|
|
*
|
|
* For the full copyright and license information, please view
|
|
* the LICENSE file that was distributed with this source code.
|
|
*/
|
|
|
|
namespace CodeIgniter\Database\SQLite3;
|
|
|
|
use CodeIgniter\Database\BaseConnection;
|
|
use CodeIgniter\Database\Exceptions\DatabaseException;
|
|
use ErrorException;
|
|
use Exception;
|
|
use SQLite3;
|
|
use stdClass;
|
|
|
|
/**
|
|
* Connection for SQLite3
|
|
*/
|
|
class Connection extends BaseConnection
|
|
{
|
|
/**
|
|
* Database driver
|
|
*
|
|
* @var string
|
|
*/
|
|
public $DBDriver = 'SQLite3';
|
|
|
|
/**
|
|
* Identifier escape character
|
|
*
|
|
* @var string
|
|
*/
|
|
public $escapeChar = '`';
|
|
|
|
/**
|
|
* Connect to the database.
|
|
*
|
|
* @throws DatabaseException
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public function connect(bool $persistent = false)
|
|
{
|
|
if ($persistent && $this->DBDebug) {
|
|
throw new DatabaseException('SQLite3 doesn\'t support persistent connections.');
|
|
}
|
|
|
|
try {
|
|
if ($this->database !== ':memory:' && strpos($this->database, DIRECTORY_SEPARATOR) === false) {
|
|
$this->database = WRITEPATH . $this->database;
|
|
}
|
|
|
|
return (! $this->password)
|
|
? new SQLite3($this->database)
|
|
: new SQLite3($this->database, SQLITE3_OPEN_READWRITE | SQLITE3_OPEN_CREATE, $this->password);
|
|
} catch (Exception $e) {
|
|
throw new DatabaseException('SQLite3 error: ' . $e->getMessage());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Keep or establish the connection if no queries have been sent for
|
|
* a length of time exceeding the server's idle timeout.
|
|
*/
|
|
public function reconnect()
|
|
{
|
|
$this->close();
|
|
$this->initialize();
|
|
}
|
|
|
|
/**
|
|
* Close the database connection.
|
|
*/
|
|
protected function _close()
|
|
{
|
|
$this->connID->close();
|
|
}
|
|
|
|
/**
|
|
* Select a specific database table to use.
|
|
*/
|
|
public function setDatabase(string $databaseName): bool
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns a string containing the version of the database being used.
|
|
*/
|
|
public function getVersion(): string
|
|
{
|
|
if (isset($this->dataCache['version'])) {
|
|
return $this->dataCache['version'];
|
|
}
|
|
|
|
$version = SQLite3::version();
|
|
|
|
return $this->dataCache['version'] = $version['versionString'];
|
|
}
|
|
|
|
/**
|
|
* Execute the query
|
|
*
|
|
* @return mixed \SQLite3Result object or bool
|
|
*/
|
|
protected function execute(string $sql)
|
|
{
|
|
try {
|
|
return $this->isWriteType($sql)
|
|
? $this->connID->exec($sql)
|
|
: $this->connID->query($sql);
|
|
} catch (ErrorException $e) {
|
|
log_message('error', $e);
|
|
if ($this->DBDebug) {
|
|
throw $e;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns the total number of rows affected by this query.
|
|
*/
|
|
public function affectedRows(): int
|
|
{
|
|
return $this->connID->changes();
|
|
}
|
|
|
|
/**
|
|
* Platform-dependant string escape
|
|
*/
|
|
protected function _escapeString(string $str): string
|
|
{
|
|
return $this->connID->escapeString($str);
|
|
}
|
|
|
|
/**
|
|
* Generates the SQL for listing tables in a platform-dependent manner.
|
|
*/
|
|
protected function _listTables(bool $prefixLimit = false): string
|
|
{
|
|
return 'SELECT "NAME" FROM "SQLITE_MASTER" WHERE "TYPE" = \'table\''
|
|
. ' AND "NAME" NOT LIKE \'sqlite!_%\' ESCAPE \'!\''
|
|
. (($prefixLimit !== false && $this->DBPrefix !== '')
|
|
? ' AND "NAME" LIKE \'' . $this->escapeLikeString($this->DBPrefix) . '%\' ' . sprintf($this->likeEscapeStr, $this->likeEscapeChar)
|
|
: '');
|
|
}
|
|
|
|
/**
|
|
* Generates a platform-specific query string so that the column names can be fetched.
|
|
*/
|
|
protected function _listColumns(string $table = ''): string
|
|
{
|
|
return 'PRAGMA TABLE_INFO(' . $this->protectIdentifiers($table, true, null, false) . ')';
|
|
}
|
|
|
|
/**
|
|
* @throws DatabaseException
|
|
*
|
|
* @return array|false
|
|
*/
|
|
public function getFieldNames(string $table)
|
|
{
|
|
// Is there a cached result?
|
|
if (isset($this->dataCache['field_names'][$table])) {
|
|
return $this->dataCache['field_names'][$table];
|
|
}
|
|
|
|
if (empty($this->connID)) {
|
|
$this->initialize();
|
|
}
|
|
|
|
$sql = $this->_listColumns($table);
|
|
|
|
$query = $this->query($sql);
|
|
$this->dataCache['field_names'][$table] = [];
|
|
|
|
foreach ($query->getResultArray() as $row) {
|
|
// Do we know from where to get the column's name?
|
|
if (! isset($key)) {
|
|
if (isset($row['column_name'])) {
|
|
$key = 'column_name';
|
|
} elseif (isset($row['COLUMN_NAME'])) {
|
|
$key = 'COLUMN_NAME';
|
|
} elseif (isset($row['name'])) {
|
|
$key = 'name';
|
|
} else {
|
|
// We have no other choice but to just get the first element's key.
|
|
$key = key($row);
|
|
}
|
|
}
|
|
|
|
$this->dataCache['field_names'][$table][] = $row[$key];
|
|
}
|
|
|
|
return $this->dataCache['field_names'][$table];
|
|
}
|
|
|
|
/**
|
|
* Returns an array of objects with field data
|
|
*
|
|
* @throws DatabaseException
|
|
*
|
|
* @return stdClass[]
|
|
*/
|
|
protected function _fieldData(string $table): array
|
|
{
|
|
if (false === $query = $this->query('PRAGMA TABLE_INFO(' . $this->protectIdentifiers($table, true, null, false) . ')')) {
|
|
throw new DatabaseException(lang('Database.failGetFieldData'));
|
|
}
|
|
|
|
$query = $query->getResultObject();
|
|
|
|
if (empty($query)) {
|
|
return [];
|
|
}
|
|
|
|
$retVal = [];
|
|
|
|
for ($i = 0, $c = count($query); $i < $c; $i++) {
|
|
$retVal[$i] = new stdClass();
|
|
|
|
$retVal[$i]->name = $query[$i]->name;
|
|
$retVal[$i]->type = $query[$i]->type;
|
|
$retVal[$i]->max_length = null;
|
|
$retVal[$i]->default = $query[$i]->dflt_value;
|
|
$retVal[$i]->primary_key = isset($query[$i]->pk) && (bool) $query[$i]->pk;
|
|
$retVal[$i]->nullable = isset($query[$i]->notnull) && ! (bool) $query[$i]->notnull;
|
|
}
|
|
|
|
return $retVal;
|
|
}
|
|
|
|
/**
|
|
* Returns an array of objects with index data
|
|
*
|
|
* @throws DatabaseException
|
|
*
|
|
* @return stdClass[]
|
|
*/
|
|
protected function _indexData(string $table): array
|
|
{
|
|
// Get indexes
|
|
// Don't use PRAGMA index_list, so we can preserve index order
|
|
$sql = "SELECT name FROM sqlite_master WHERE type='index' AND tbl_name=" . $this->escape(strtolower($table));
|
|
if (($query = $this->query($sql)) === false) {
|
|
throw new DatabaseException(lang('Database.failGetIndexData'));
|
|
}
|
|
$query = $query->getResultObject();
|
|
|
|
$retVal = [];
|
|
|
|
foreach ($query as $row) {
|
|
$obj = new stdClass();
|
|
|
|
$obj->name = $row->name;
|
|
|
|
// Get fields for index
|
|
$obj->fields = [];
|
|
|
|
if (false === $fields = $this->query('PRAGMA index_info(' . $this->escape(strtolower($row->name)) . ')')) {
|
|
throw new DatabaseException(lang('Database.failGetIndexData'));
|
|
}
|
|
|
|
$fields = $fields->getResultObject();
|
|
|
|
foreach ($fields as $field) {
|
|
$obj->fields[] = $field->name;
|
|
}
|
|
|
|
$retVal[$obj->name] = $obj;
|
|
}
|
|
|
|
return $retVal;
|
|
}
|
|
|
|
/**
|
|
* Returns an array of objects with Foreign key data
|
|
*
|
|
* @return stdClass[]
|
|
*/
|
|
protected function _foreignKeyData(string $table): array
|
|
{
|
|
if ($this->supportsForeignKeys() !== true) {
|
|
return [];
|
|
}
|
|
|
|
$tables = $this->listTables();
|
|
|
|
if (empty($tables)) {
|
|
return [];
|
|
}
|
|
|
|
$retVal = [];
|
|
|
|
foreach ($tables as $table) {
|
|
$query = $this->query("PRAGMA foreign_key_list({$table})")->getResult();
|
|
|
|
foreach ($query as $row) {
|
|
$obj = new stdClass();
|
|
$obj->constraint_name = $row->from . ' to ' . $row->table . '.' . $row->to;
|
|
$obj->table_name = $table;
|
|
$obj->foreign_table_name = $row->table;
|
|
$obj->sequence = $row->seq;
|
|
|
|
$retVal[] = $obj;
|
|
}
|
|
}
|
|
|
|
return $retVal;
|
|
}
|
|
|
|
/**
|
|
* Returns platform-specific SQL to disable foreign key checks.
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function _disableForeignKeyChecks()
|
|
{
|
|
return 'PRAGMA foreign_keys = OFF';
|
|
}
|
|
|
|
/**
|
|
* Returns platform-specific SQL to enable foreign key checks.
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function _enableForeignKeyChecks()
|
|
{
|
|
return 'PRAGMA foreign_keys = ON';
|
|
}
|
|
|
|
/**
|
|
* Returns the last error code and message.
|
|
* Must return this format: ['code' => string|int, 'message' => string]
|
|
* intval(code) === 0 means "no error".
|
|
*
|
|
* @return array<string, int|string>
|
|
*/
|
|
public function error(): array
|
|
{
|
|
return [
|
|
'code' => $this->connID->lastErrorCode(),
|
|
'message' => $this->connID->lastErrorMsg(),
|
|
];
|
|
}
|
|
|
|
/**
|
|
* Insert ID
|
|
*/
|
|
public function insertID(): int
|
|
{
|
|
return $this->connID->lastInsertRowID();
|
|
}
|
|
|
|
/**
|
|
* Begin Transaction
|
|
*/
|
|
protected function _transBegin(): bool
|
|
{
|
|
return $this->connID->exec('BEGIN TRANSACTION');
|
|
}
|
|
|
|
/**
|
|
* Commit Transaction
|
|
*/
|
|
protected function _transCommit(): bool
|
|
{
|
|
return $this->connID->exec('END TRANSACTION');
|
|
}
|
|
|
|
/**
|
|
* Rollback Transaction
|
|
*/
|
|
protected function _transRollback(): bool
|
|
{
|
|
return $this->connID->exec('ROLLBACK');
|
|
}
|
|
|
|
/**
|
|
* Checks to see if the current install supports Foreign Keys
|
|
* and has them enabled.
|
|
*/
|
|
public function supportsForeignKeys(): bool
|
|
{
|
|
$result = $this->simpleQuery('PRAGMA foreign_keys');
|
|
|
|
return (bool) $result;
|
|
}
|
|
}
|