New file |
0,0 → 1,963 |
<?php |
|
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
|
/** |
* The PEAR DB driver for PHP's sqlite extension |
* for interacting with SQLite databases |
* |
* PHP version 5 |
* |
* LICENSE: This source file is subject to version 3.0 of the PHP license |
* that is available through the world-wide-web at the following URI: |
* http://www.php.net/license/3_0.txt. If you did not receive a copy of |
* the PHP License and are unable to obtain it through the web, please |
* send a note to license@php.net so we can mail you a copy immediately. |
* |
* @category Database |
* @package DB |
* @author Urs Gehrig <urs@circle.ch> |
* @author Mika Tuupola <tuupola@appelsiini.net> |
* @author Daniel Convissor <danielc@php.net> |
* @copyright 1997-2007 The PHP Group |
* @license http://www.php.net/license/3_0.txt PHP License 3.0 3.0 |
* @version CVS: $Id$ |
* @link http://pear.php.net/package/DB |
*/ |
|
/** |
* Obtain the DB_common class so it can be extended from |
*/ |
require_once 'DB/common.php'; |
|
/** |
* The methods PEAR DB uses to interact with PHP's sqlite extension |
* for interacting with SQLite databases |
* |
* These methods overload the ones declared in DB_common. |
* |
* NOTICE: This driver needs PHP's track_errors ini setting to be on. |
* It is automatically turned on when connecting to the database. |
* Make sure your scripts don't turn it off. |
* |
* @category Database |
* @package DB |
* @author Urs Gehrig <urs@circle.ch> |
* @author Mika Tuupola <tuupola@appelsiini.net> |
* @author Daniel Convissor <danielc@php.net> |
* @copyright 1997-2007 The PHP Group |
* @license http://www.php.net/license/3_0.txt PHP License 3.0 3.0 |
* @version Release: 1.9.2 |
* @link http://pear.php.net/package/DB |
*/ |
class DB_sqlite extends DB_common |
{ |
// {{{ properties |
|
/** |
* The DB driver type (mysql, oci8, odbc, etc.) |
* @var string |
*/ |
var $phptype = 'sqlite'; |
|
/** |
* The database syntax variant to be used (db2, access, etc.), if any |
* @var string |
*/ |
var $dbsyntax = 'sqlite'; |
|
/** |
* The capabilities of this DB implementation |
* |
* The 'new_link' element contains the PHP version that first provided |
* new_link support for this DBMS. Contains false if it's unsupported. |
* |
* Meaning of the 'limit' element: |
* + 'emulate' = emulate with fetch row by number |
* + 'alter' = alter the query |
* + false = skip rows |
* |
* @var array |
*/ |
var $features = array( |
'limit' => 'alter', |
'new_link' => false, |
'numrows' => true, |
'pconnect' => true, |
'prepare' => false, |
'ssl' => false, |
'transactions' => false, |
); |
|
/** |
* A mapping of native error codes to DB error codes |
* |
* {@internal Error codes according to sqlite_exec. See the online |
* manual at http://sqlite.org/c_interface.html for info. |
* This error handling based on sqlite_exec is not yet implemented.}} |
* |
* @var array |
*/ |
var $errorcode_map = array( |
); |
|
/** |
* The raw database connection created by PHP |
* @var resource |
*/ |
var $connection; |
|
/** |
* The DSN information for connecting to a database |
* @var array |
*/ |
var $dsn = array(); |
|
|
/** |
* SQLite data types |
* |
* @link http://www.sqlite.org/datatypes.html |
* |
* @var array |
*/ |
var $keywords = array ( |
'BLOB' => '', |
'BOOLEAN' => '', |
'CHARACTER' => '', |
'CLOB' => '', |
'FLOAT' => '', |
'INTEGER' => '', |
'KEY' => '', |
'NATIONAL' => '', |
'NUMERIC' => '', |
'NVARCHAR' => '', |
'PRIMARY' => '', |
'TEXT' => '', |
'TIMESTAMP' => '', |
'UNIQUE' => '', |
'VARCHAR' => '', |
'VARYING' => '', |
); |
|
/** |
* The most recent error message from $php_errormsg |
* @var string |
* @access private |
*/ |
var $_lasterror = ''; |
|
|
// }}} |
// {{{ constructor |
|
/** |
* This constructor calls <kbd>parent::__construct()</kbd> |
* |
* @return void |
*/ |
function __construct() |
{ |
parent::__construct(); |
} |
|
// }}} |
// {{{ connect() |
|
/** |
* Connect to the database server, log in and open the database |
* |
* Don't call this method directly. Use DB::connect() instead. |
* |
* PEAR DB's sqlite driver supports the following extra DSN options: |
* + mode The permissions for the database file, in four digit |
* chmod octal format (eg "0600"). |
* |
* Example of connecting to a database in read-only mode: |
* <code> |
* require_once 'DB.php'; |
* |
* $dsn = 'sqlite:///path/and/name/of/db/file?mode=0400'; |
* $options = array( |
* 'portability' => DB_PORTABILITY_ALL, |
* ); |
* |
* $db = DB::connect($dsn, $options); |
* if (PEAR::isError($db)) { |
* die($db->getMessage()); |
* } |
* </code> |
* |
* @param array $dsn the data source name |
* @param bool $persistent should the connection be persistent? |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
*/ |
function connect($dsn, $persistent = false) |
{ |
if (!PEAR::loadExtension('sqlite')) { |
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
} |
|
$this->dsn = $dsn; |
if ($dsn['dbsyntax']) { |
$this->dbsyntax = $dsn['dbsyntax']; |
} |
|
if (!$dsn['database']) { |
return $this->sqliteRaiseError(DB_ERROR_ACCESS_VIOLATION); |
} |
|
if ($dsn['database'] !== ':memory:') { |
if (!file_exists($dsn['database'])) { |
if (!touch($dsn['database'])) { |
return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND); |
} |
if (!isset($dsn['mode']) || |
!is_numeric($dsn['mode'])) |
{ |
$mode = 0644; |
} else { |
$mode = octdec($dsn['mode']); |
} |
if (!chmod($dsn['database'], $mode)) { |
return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND); |
} |
if (!file_exists($dsn['database'])) { |
return $this->sqliteRaiseError(DB_ERROR_NOT_FOUND); |
} |
} |
if (!is_file($dsn['database'])) { |
return $this->sqliteRaiseError(DB_ERROR_INVALID); |
} |
if (!is_readable($dsn['database'])) { |
return $this->sqliteRaiseError(DB_ERROR_ACCESS_VIOLATION); |
} |
} |
|
$connect_function = $persistent ? 'sqlite_popen' : 'sqlite_open'; |
|
// track_errors must remain on for simpleQuery() |
@ini_set('track_errors', 1); |
$php_errormsg = ''; |
|
if (!$this->connection = @$connect_function($dsn['database'])) { |
return $this->raiseError(DB_ERROR_NODBSELECTED, |
null, null, null, |
$php_errormsg); |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ disconnect() |
|
/** |
* Disconnects from the database server |
* |
* @return bool TRUE on success, FALSE on failure |
*/ |
function disconnect() |
{ |
$ret = @sqlite_close($this->connection); |
$this->connection = null; |
return $ret; |
} |
|
// }}} |
// {{{ simpleQuery() |
|
/** |
* Sends a query to the database server |
* |
* NOTICE: This method needs PHP's track_errors ini setting to be on. |
* It is automatically turned on when connecting to the database. |
* Make sure your scripts don't turn it off. |
* |
* @param string the SQL query string |
* |
* @return mixed + a PHP result resrouce for successful SELECT queries |
* + the DB_OK constant for other successful queries |
* + a DB_Error object on failure |
*/ |
function simpleQuery($query) |
{ |
$ismanip = $this->_checkManip($query); |
$this->last_query = $query; |
$query = $this->modifyQuery($query); |
|
$php_errormsg = ''; |
|
$result = @sqlite_query($query, $this->connection); |
$this->_lasterror = $php_errormsg ? $php_errormsg : ''; |
|
$this->result = $result; |
if (!$this->result) { |
return $this->sqliteRaiseError(null); |
} |
|
// sqlite_query() seems to allways return a resource |
// so cant use that. Using $ismanip instead |
if (!$ismanip) { |
$numRows = $this->numRows($result); |
if (is_object($numRows)) { |
// we've got PEAR_Error |
return $numRows; |
} |
return $result; |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ nextResult() |
|
/** |
* Move the internal sqlite result pointer to the next available result |
* |
* @param resource $result the valid sqlite result resource |
* |
* @return bool true if a result is available otherwise return false |
*/ |
function nextResult($result) |
{ |
return false; |
} |
|
// }}} |
// {{{ fetchInto() |
|
/** |
* Places a row from the result set into the given array |
* |
* Formating of the array and the data therein are configurable. |
* See DB_result::fetchInto() for more information. |
* |
* This method is not meant to be called directly. Use |
* DB_result::fetchInto() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result the query result resource |
* @param array $arr the referenced array to put the data in |
* @param int $fetchmode how the resulting array should be indexed |
* @param int $rownum the row number to fetch (0 = first row) |
* |
* @return mixed DB_OK on success, NULL when the end of a result set is |
* reached or on failure |
* |
* @see DB_result::fetchInto() |
*/ |
function fetchInto($result, &$arr, $fetchmode, $rownum = null) |
{ |
if ($rownum !== null) { |
if (!@sqlite_seek($this->result, $rownum)) { |
return null; |
} |
} |
if ($fetchmode & DB_FETCHMODE_ASSOC) { |
$arr = @sqlite_fetch_array($result, SQLITE_ASSOC); |
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) { |
$arr = array_change_key_case($arr, CASE_LOWER); |
} |
|
/* Remove extraneous " characters from the fields in the result. |
* Fixes bug #11716. */ |
if (is_array($arr) && count($arr) > 0) { |
$strippedArr = array(); |
foreach ($arr as $field => $value) { |
$strippedArr[trim($field, '"')] = $value; |
} |
$arr = $strippedArr; |
} |
} else { |
$arr = @sqlite_fetch_array($result, SQLITE_NUM); |
} |
if (!$arr) { |
return null; |
} |
if ($this->options['portability'] & DB_PORTABILITY_RTRIM) { |
/* |
* Even though this DBMS already trims output, we do this because |
* a field might have intentional whitespace at the end that |
* gets removed by DB_PORTABILITY_RTRIM under another driver. |
*/ |
$this->_rtrimArrayValues($arr); |
} |
if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) { |
$this->_convertNullArrayValuesToEmpty($arr); |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ freeResult() |
|
/** |
* Deletes the result set and frees the memory occupied by the result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::free() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return bool TRUE on success, FALSE if $result is invalid |
* |
* @see DB_result::free() |
*/ |
function freeResult(&$result) |
{ |
// XXX No native free? |
if (!is_resource($result)) { |
return false; |
} |
$result = null; |
return true; |
} |
|
// }}} |
// {{{ numCols() |
|
/** |
* Gets the number of columns in a result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::numCols() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return int the number of columns. A DB_Error object on failure. |
* |
* @see DB_result::numCols() |
*/ |
function numCols($result) |
{ |
$cols = @sqlite_num_fields($result); |
if (!$cols) { |
return $this->sqliteRaiseError(); |
} |
return $cols; |
} |
|
// }}} |
// {{{ numRows() |
|
/** |
* Gets the number of rows in a result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::numRows() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return int the number of rows. A DB_Error object on failure. |
* |
* @see DB_result::numRows() |
*/ |
function numRows($result) |
{ |
$rows = @sqlite_num_rows($result); |
if ($rows === null) { |
return $this->sqliteRaiseError(); |
} |
return $rows; |
} |
|
// }}} |
// {{{ affected() |
|
/** |
* Determines the number of rows affected by a data maniuplation query |
* |
* 0 is returned for queries that don't manipulate data. |
* |
* @return int the number of rows. A DB_Error object on failure. |
*/ |
function affectedRows() |
{ |
return @sqlite_changes($this->connection); |
} |
|
// }}} |
// {{{ dropSequence() |
|
/** |
* Deletes a sequence |
* |
* @param string $seq_name name of the sequence to be deleted |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
* |
* @see DB_common::dropSequence(), DB_common::getSequenceName(), |
* DB_sqlite::nextID(), DB_sqlite::createSequence() |
*/ |
function dropSequence($seq_name) |
{ |
return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name)); |
} |
|
/** |
* Creates a new sequence |
* |
* @param string $seq_name name of the new sequence |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
* |
* @see DB_common::createSequence(), DB_common::getSequenceName(), |
* DB_sqlite::nextID(), DB_sqlite::dropSequence() |
*/ |
function createSequence($seq_name) |
{ |
$seqname = $this->getSequenceName($seq_name); |
$query = 'CREATE TABLE ' . $seqname . |
' (id INTEGER UNSIGNED PRIMARY KEY) '; |
$result = $this->query($query); |
if (DB::isError($result)) { |
return($result); |
} |
$query = "CREATE TRIGGER ${seqname}_cleanup AFTER INSERT ON $seqname |
BEGIN |
DELETE FROM $seqname WHERE id<LAST_INSERT_ROWID(); |
END "; |
$result = $this->query($query); |
if (DB::isError($result)) { |
return($result); |
} |
} |
|
// }}} |
// {{{ nextId() |
|
/** |
* Returns the next free id in a sequence |
* |
* @param string $seq_name name of the sequence |
* @param boolean $ondemand when true, the seqence is automatically |
* created if it does not exist |
* |
* @return int the next id number in the sequence. |
* A DB_Error object on failure. |
* |
* @see DB_common::nextID(), DB_common::getSequenceName(), |
* DB_sqlite::createSequence(), DB_sqlite::dropSequence() |
*/ |
function nextId($seq_name, $ondemand = true) |
{ |
$seqname = $this->getSequenceName($seq_name); |
|
do { |
$repeat = 0; |
$this->pushErrorHandling(PEAR_ERROR_RETURN); |
$result = $this->query("INSERT INTO $seqname (id) VALUES (NULL)"); |
$this->popErrorHandling(); |
if ($result === DB_OK) { |
$id = @sqlite_last_insert_rowid($this->connection); |
if ($id != 0) { |
return $id; |
} |
} elseif ($ondemand && DB::isError($result) && |
$result->getCode() == DB_ERROR_NOSUCHTABLE) |
{ |
$result = $this->createSequence($seq_name); |
if (DB::isError($result)) { |
return $this->raiseError($result); |
} else { |
$repeat = 1; |
} |
} |
} while ($repeat); |
|
return $this->raiseError($result); |
} |
|
// }}} |
// {{{ getDbFileStats() |
|
/** |
* Get the file stats for the current database |
* |
* Possible arguments are dev, ino, mode, nlink, uid, gid, rdev, size, |
* atime, mtime, ctime, blksize, blocks or a numeric key between |
* 0 and 12. |
* |
* @param string $arg the array key for stats() |
* |
* @return mixed an array on an unspecified key, integer on a passed |
* arg and false at a stats error |
*/ |
function getDbFileStats($arg = '') |
{ |
$stats = stat($this->dsn['database']); |
if ($stats == false) { |
return false; |
} |
if (is_array($stats)) { |
if (is_numeric($arg)) { |
if (((int)$arg <= 12) & ((int)$arg >= 0)) { |
return false; |
} |
return $stats[$arg ]; |
} |
if (array_key_exists(trim($arg), $stats)) { |
return $stats[$arg ]; |
} |
} |
return $stats; |
} |
|
// }}} |
// {{{ escapeSimple() |
|
/** |
* Escapes a string according to the current DBMS's standards |
* |
* In SQLite, this makes things safe for inserts/updates, but may |
* cause problems when performing text comparisons against columns |
* containing binary data. See the |
* {@link http://php.net/sqlite_escape_string PHP manual} for more info. |
* |
* @param string $str the string to be escaped |
* |
* @return string the escaped string |
* |
* @since Method available since Release 1.6.1 |
* @see DB_common::escapeSimple() |
*/ |
function escapeSimple($str) |
{ |
return @sqlite_escape_string($str); |
} |
|
// }}} |
// {{{ modifyLimitQuery() |
|
/** |
* Adds LIMIT clauses to a query string according to current DBMS standards |
* |
* @param string $query the query to modify |
* @param int $from the row to start to fetching (0 = the first row) |
* @param int $count the numbers of rows to fetch |
* @param mixed $params array, string or numeric data to be used in |
* execution of the statement. Quantity of items |
* passed must match quantity of placeholders in |
* query: meaning 1 placeholder for non-array |
* parameters or 1 placeholder per array element. |
* |
* @return string the query string with LIMIT clauses added |
* |
* @access protected |
*/ |
function modifyLimitQuery($query, $from, $count, $params = array()) |
{ |
return "$query LIMIT $count OFFSET $from"; |
} |
|
// }}} |
// {{{ modifyQuery() |
|
/** |
* Changes a query string for various DBMS specific reasons |
* |
* This little hack lets you know how many rows were deleted |
* when running a "DELETE FROM table" query. Only implemented |
* if the DB_PORTABILITY_DELETE_COUNT portability option is on. |
* |
* @param string $query the query string to modify |
* |
* @return string the modified query string |
* |
* @access protected |
* @see DB_common::setOption() |
*/ |
function modifyQuery($query) |
{ |
if ($this->options['portability'] & DB_PORTABILITY_DELETE_COUNT) { |
if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) { |
$query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/', |
'DELETE FROM \1 WHERE 1=1', $query); |
} |
} |
return $query; |
} |
|
// }}} |
// {{{ sqliteRaiseError() |
|
/** |
* Produces a DB_Error object regarding the current problem |
* |
* @param int $errno if the error is being manually raised pass a |
* DB_ERROR* constant here. If this isn't passed |
* the error information gathered from the DBMS. |
* |
* @return object the DB_Error object |
* |
* @see DB_common::raiseError(), |
* DB_sqlite::errorNative(), DB_sqlite::errorCode() |
*/ |
function sqliteRaiseError($errno = null) |
{ |
$native = $this->errorNative(); |
if ($errno === null) { |
$errno = $this->errorCode($native); |
} |
|
$errorcode = @sqlite_last_error($this->connection); |
$userinfo = "$errorcode ** $this->last_query"; |
|
return $this->raiseError($errno, null, null, $userinfo, $native); |
} |
|
// }}} |
// {{{ errorNative() |
|
/** |
* Gets the DBMS' native error message produced by the last query |
* |
* {@internal This is used to retrieve more meaningfull error messages |
* because sqlite_last_error() does not provide adequate info.}} |
* |
* @return string the DBMS' error message |
*/ |
function errorNative() |
{ |
return $this->_lasterror; |
} |
|
// }}} |
// {{{ errorCode() |
|
/** |
* Determines PEAR::DB error code from the database's text error message |
* |
* @param string $errormsg the error message returned from the database |
* |
* @return integer the DB error number |
*/ |
function errorCode($errormsg) |
{ |
static $error_regexps; |
|
// PHP 5.2+ prepends the function name to $php_errormsg, so we need |
// this hack to work around it, per bug #9599. |
$errormsg = preg_replace('/^sqlite[a-z_]+\(\): /', '', $errormsg); |
|
if (!isset($error_regexps)) { |
$error_regexps = array( |
'/^no such table:/' => DB_ERROR_NOSUCHTABLE, |
'/^no such index:/' => DB_ERROR_NOT_FOUND, |
'/^(table|index) .* already exists$/' => DB_ERROR_ALREADY_EXISTS, |
'/PRIMARY KEY must be unique/i' => DB_ERROR_CONSTRAINT, |
'/is not unique/' => DB_ERROR_CONSTRAINT, |
'/columns .* are not unique/i' => DB_ERROR_CONSTRAINT, |
'/uniqueness constraint failed/' => DB_ERROR_CONSTRAINT, |
'/may not be NULL/' => DB_ERROR_CONSTRAINT_NOT_NULL, |
'/^no such column:/' => DB_ERROR_NOSUCHFIELD, |
'/no column named/' => DB_ERROR_NOSUCHFIELD, |
'/column not present in both tables/i' => DB_ERROR_NOSUCHFIELD, |
'/^near ".*": syntax error$/' => DB_ERROR_SYNTAX, |
'/[0-9]+ values for [0-9]+ columns/i' => DB_ERROR_VALUE_COUNT_ON_ROW, |
); |
} |
foreach ($error_regexps as $regexp => $code) { |
if (preg_match($regexp, $errormsg)) { |
return $code; |
} |
} |
// Fall back to DB_ERROR if there was no mapping. |
return DB_ERROR; |
} |
|
// }}} |
// {{{ tableInfo() |
|
/** |
* Returns information about a table |
* |
* @param string $result a string containing the name of a table |
* @param int $mode a valid tableInfo mode |
* |
* @return array an associative array with the information requested. |
* A DB_Error object on failure. |
* |
* @see DB_common::tableInfo() |
* @since Method available since Release 1.7.0 |
*/ |
function tableInfo($result, $mode = null) |
{ |
if (is_string($result)) { |
/* |
* Probably received a table name. |
* Create a result resource identifier. |
*/ |
$id = @sqlite_array_query($this->connection, |
"PRAGMA table_info('$result');", |
SQLITE_ASSOC); |
$got_string = true; |
} else { |
$this->last_query = ''; |
return $this->raiseError(DB_ERROR_NOT_CAPABLE, null, null, null, |
'This DBMS can not obtain tableInfo' . |
' from result sets'); |
} |
|
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) { |
$case_func = 'strtolower'; |
} else { |
$case_func = 'strval'; |
} |
|
$count = count($id); |
$res = array(); |
|
if ($mode) { |
$res['num_fields'] = $count; |
} |
|
for ($i = 0; $i < $count; $i++) { |
if (strpos($id[$i]['type'], '(') !== false) { |
$bits = explode('(', $id[$i]['type']); |
$type = $bits[0]; |
$len = rtrim($bits[1],')'); |
} else { |
$type = $id[$i]['type']; |
$len = 0; |
} |
|
$flags = ''; |
if ($id[$i]['pk']) { |
$flags .= 'primary_key '; |
if (strtoupper($type) == 'INTEGER') { |
$flags .= 'auto_increment '; |
} |
} |
if ($id[$i]['notnull']) { |
$flags .= 'not_null '; |
} |
if ($id[$i]['dflt_value'] !== null) { |
$flags .= 'default_' . rawurlencode($id[$i]['dflt_value']); |
} |
$flags = trim($flags); |
|
$res[$i] = array( |
'table' => $case_func($result), |
'name' => $case_func($id[$i]['name']), |
'type' => $type, |
'len' => $len, |
'flags' => $flags, |
); |
|
if ($mode & DB_TABLEINFO_ORDER) { |
$res['order'][$res[$i]['name']] = $i; |
} |
if ($mode & DB_TABLEINFO_ORDERTABLE) { |
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i; |
} |
} |
|
return $res; |
} |
|
// }}} |
// {{{ getSpecialQuery() |
|
/** |
* Obtains the query string needed for listing a given type of objects |
* |
* @param string $type the kind of objects you want to retrieve |
* @param array $args SQLITE DRIVER ONLY: a private array of arguments |
* used by the getSpecialQuery(). Do not use |
* this directly. |
* |
* @return string the SQL query string or null if the driver doesn't |
* support the object type requested |
* |
* @access protected |
* @see DB_common::getListOf() |
*/ |
function getSpecialQuery($type, $args = array()) |
{ |
if (!is_array($args)) { |
return $this->raiseError('no key specified', null, null, null, |
'Argument has to be an array.'); |
} |
|
switch ($type) { |
case 'master': |
return 'SELECT * FROM sqlite_master;'; |
case 'tables': |
return "SELECT name FROM sqlite_master WHERE type='table' " |
. 'UNION ALL SELECT name FROM sqlite_temp_master ' |
. "WHERE type='table' ORDER BY name;"; |
case 'schema': |
return 'SELECT sql FROM (SELECT * FROM sqlite_master ' |
. 'UNION ALL SELECT * FROM sqlite_temp_master) ' |
. "WHERE type!='meta' " |
. 'ORDER BY tbl_name, type DESC, name;'; |
case 'schemax': |
case 'schema_x': |
/* |
* Use like: |
* $res = $db->query($db->getSpecialQuery('schema_x', |
* array('table' => 'table3'))); |
*/ |
return 'SELECT sql FROM (SELECT * FROM sqlite_master ' |
. 'UNION ALL SELECT * FROM sqlite_temp_master) ' |
. "WHERE tbl_name LIKE '{$args['table']}' " |
. "AND type!='meta' " |
. 'ORDER BY type DESC, name;'; |
case 'alter': |
/* |
* SQLite does not support ALTER TABLE; this is a helper query |
* to handle this. 'table' represents the table name, 'rows' |
* the news rows to create, 'save' the row(s) to keep _with_ |
* the data. |
* |
* Use like: |
* $args = array( |
* 'table' => $table, |
* 'rows' => "id INTEGER PRIMARY KEY, firstname TEXT, surname TEXT, datetime TEXT", |
* 'save' => "NULL, titel, content, datetime" |
* ); |
* $res = $db->query( $db->getSpecialQuery('alter', $args)); |
*/ |
$rows = strtr($args['rows'], $this->keywords); |
|
$q = array( |
'BEGIN TRANSACTION', |
"CREATE TEMPORARY TABLE {$args['table']}_backup ({$args['rows']})", |
"INSERT INTO {$args['table']}_backup SELECT {$args['save']} FROM {$args['table']}", |
"DROP TABLE {$args['table']}", |
"CREATE TABLE {$args['table']} ({$args['rows']})", |
"INSERT INTO {$args['table']} SELECT {$rows} FROM {$args['table']}_backup", |
"DROP TABLE {$args['table']}_backup", |
'COMMIT', |
); |
|
/* |
* This is a dirty hack, since the above query will not get |
* executed with a single query call so here the query method |
* will be called directly and return a select instead. |
*/ |
foreach ($q as $query) { |
$this->query($query); |
} |
return "SELECT * FROM {$args['table']};"; |
default: |
return null; |
} |
} |
|
// }}} |
} |
|
/* |
* Local variables: |
* tab-width: 4 |
* c-basic-offset: 4 |
* End: |
*/ |
|
?> |