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| Current File : //usr/local/share/pear/DB/fbsql.php |
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* The PEAR DB driver for PHP's fbsql extension
* for interacting with FrontBase 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 Frank M. Kromann <frank@frontbase.com>
* @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
* @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 fbsql extension
* for interacting with FrontBase databases
*
* These methods overload the ones declared in DB_common.
*
* @category Database
* @package DB
* @author Frank M. Kromann <frank@frontbase.com>
* @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
* @version Release: 1.8.2
* @link http://pear.php.net/package/DB
* @since Class functional since Release 1.7.0
*/
class DB_fbsql extends DB_common
{
// {{{ properties
/**
* The DB driver type (mysql, oci8, odbc, etc.)
* @var string
*/
var $phptype = 'fbsql';
/**
* The database syntax variant to be used (db2, access, etc.), if any
* @var string
*/
var $dbsyntax = 'fbsql';
/**
* 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' => true,
);
/**
* A mapping of native error codes to DB error codes
* @var array
*/
var $errorcode_map = array(
22 => DB_ERROR_SYNTAX,
85 => DB_ERROR_ALREADY_EXISTS,
108 => DB_ERROR_SYNTAX,
116 => DB_ERROR_NOSUCHTABLE,
124 => DB_ERROR_VALUE_COUNT_ON_ROW,
215 => DB_ERROR_NOSUCHFIELD,
217 => DB_ERROR_INVALID_NUMBER,
226 => DB_ERROR_NOSUCHFIELD,
231 => DB_ERROR_INVALID,
239 => DB_ERROR_TRUNCATED,
251 => DB_ERROR_SYNTAX,
266 => DB_ERROR_NOT_FOUND,
357 => DB_ERROR_CONSTRAINT_NOT_NULL,
358 => DB_ERROR_CONSTRAINT,
360 => DB_ERROR_CONSTRAINT,
361 => DB_ERROR_CONSTRAINT,
);
/**
* The raw database connection created by PHP
* @var resource
*/
var $connection;
/**
* The DSN information for connecting to a database
* @var array
*/
var $dsn = array();
// }}}
// {{{ constructor
/**
* This constructor calls <kbd>$this->DB_common()</kbd>
*
* @return void
*/
function DB_fbsql()
{
$this->DB_common();
}
// }}}
// {{{ connect()
/**
* Connect to the database server, log in and open the database
*
* Don't call this method directly. Use DB::connect() instead.
*
* @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('fbsql')) {
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
}
$this->dsn = $dsn;
if ($dsn['dbsyntax']) {
$this->dbsyntax = $dsn['dbsyntax'];
}
$params = array(
$dsn['hostspec'] ? $dsn['hostspec'] : 'localhost',
$dsn['username'] ? $dsn['username'] : null,
$dsn['password'] ? $dsn['password'] : null,
);
$connect_function = $persistent ? 'fbsql_pconnect' : 'fbsql_connect';
$ini = ini_get('track_errors');
$php_errormsg = '';
if ($ini) {
$this->connection = @call_user_func_array($connect_function,
$params);
} else {
@ini_set('track_errors', 1);
$this->connection = @call_user_func_array($connect_function,
$params);
@ini_set('track_errors', $ini);
}
if (!$this->connection) {
return $this->raiseError(DB_ERROR_CONNECT_FAILED,
null, null, null,
$php_errormsg);
}
if ($dsn['database']) {
if (!@fbsql_select_db($dsn['database'], $this->connection)) {
return $this->fbsqlRaiseError();
}
}
return DB_OK;
}
// }}}
// {{{ disconnect()
/**
* Disconnects from the database server
*
* @return bool TRUE on success, FALSE on failure
*/
function disconnect()
{
$ret = @fbsql_close($this->connection);
$this->connection = null;
return $ret;
}
// }}}
// {{{ simpleQuery()
/**
* Sends a query to the database server
*
* @param string the SQL query string
*
* @return mixed + a PHP result resrouce for successful SELECT queries
* + the DB_OK constant for other successful queries
* + a DB_Error object on failure
*/
function simpleQuery($query)
{
$this->last_query = $query;
$query = $this->modifyQuery($query);
$result = @fbsql_query("$query;", $this->connection);
if (!$result) {
return $this->fbsqlRaiseError();
}
// Determine which queries that should return data, and which
// should return an error code only.
if ($this->_checkManip($query)) {
return DB_OK;
}
return $result;
}
// }}}
// {{{ nextResult()
/**
* Move the internal fbsql result pointer to the next available result
*
* @param a valid fbsql result resource
*
* @access public
*
* @return true if a result is available otherwise return false
*/
function nextResult($result)
{
return @fbsql_next_result($result);
}
// }}}
// {{{ 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 (!@fbsql_data_seek($result, $rownum)) {
return null;
}
}
if ($fetchmode & DB_FETCHMODE_ASSOC) {
$arr = @fbsql_fetch_array($result, FBSQL_ASSOC);
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
$arr = array_change_key_case($arr, CASE_LOWER);
}
} else {
$arr = @fbsql_fetch_row($result);
}
if (!$arr) {
return null;
}
if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
$this->_rtrimArrayValues($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)
{
return is_resource($result) ? fbsql_free_result($result) : false;
}
// }}}
// {{{ autoCommit()
/**
* Enables or disables automatic commits
*
* @param bool $onoff true turns it on, false turns it off
*
* @return int DB_OK on success. A DB_Error object if the driver
* doesn't support auto-committing transactions.
*/
function autoCommit($onoff=false)
{
if ($onoff) {
$this->query("SET COMMIT TRUE");
} else {
$this->query("SET COMMIT FALSE");
}
}
// }}}
// {{{ commit()
/**
* Commits the current transaction
*
* @return int DB_OK on success. A DB_Error object on failure.
*/
function commit()
{
@fbsql_commit($this->connection);
}
// }}}
// {{{ rollback()
/**
* Reverts the current transaction
*
* @return int DB_OK on success. A DB_Error object on failure.
*/
function rollback()
{
@fbsql_rollback($this->connection);
}
// }}}
// {{{ 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)
{
$cols = @fbsql_num_fields($result);
if (!$cols) {
return $this->fbsqlRaiseError();
}
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)
{
$rows = @fbsql_num_rows($result);
if ($rows === null) {
return $this->fbsqlRaiseError();
}
return $rows;
}
// }}}
// {{{ affectedRows()
/**
* Determines the number of rows affected by a data maniuplation query
*
* 0 is returned for queries that don't manipulate data.
*
* @return int the number of rows. A DB_Error object on failure.
*/
function affectedRows()
{
if ($this->_last_query_manip) {
$result = @fbsql_affected_rows($this->connection);
} else {
$result = 0;
}
return $result;
}
// }}}
// {{{ nextId()
/**
* Returns the next free id in a sequence
*
* @param string $seq_name name of the sequence
* @param boolean $ondemand when true, the seqence is automatically
* created if it does not exist
*
* @return int the next id number in the sequence.
* A DB_Error object on failure.
*
* @see DB_common::nextID(), DB_common::getSequenceName(),
* DB_fbsql::createSequence(), DB_fbsql::dropSequence()
*/
function nextId($seq_name, $ondemand = true)
{
$seqname = $this->getSequenceName($seq_name);
do {
$repeat = 0;
$this->pushErrorHandling(PEAR_ERROR_RETURN);
$result = $this->query('SELECT UNIQUE FROM ' . $seqname);
$this->popErrorHandling();
if ($ondemand && DB::isError($result) &&
$result->getCode() == DB_ERROR_NOSUCHTABLE) {
$repeat = 1;
$result = $this->createSequence($seq_name);
if (DB::isError($result)) {
return $result;
}
} else {
$repeat = 0;
}
} while ($repeat);
if (DB::isError($result)) {
return $this->fbsqlRaiseError();
}
$result->fetchInto($tmp, DB_FETCHMODE_ORDERED);
return $tmp[0];
}
/**
* Creates a new sequence
*
* @param string $seq_name name of the new sequence
*
* @return int DB_OK on success. A DB_Error object on failure.
*
* @see DB_common::createSequence(), DB_common::getSequenceName(),
* DB_fbsql::nextID(), DB_fbsql::dropSequence()
*/
function createSequence($seq_name)
{
$seqname = $this->getSequenceName($seq_name);
$res = $this->query('CREATE TABLE ' . $seqname
. ' (id INTEGER NOT NULL,'
. ' PRIMARY KEY(id))');
if ($res) {
$res = $this->query('SET UNIQUE = 0 FOR ' . $seqname);
}
return $res;
}
// }}}
// {{{ dropSequence()
/**
* Deletes a sequence
*
* @param string $seq_name name of the sequence to be deleted
*
* @return int DB_OK on success. A DB_Error object on failure.
*
* @see DB_common::dropSequence(), DB_common::getSequenceName(),
* DB_fbsql::nextID(), DB_fbsql::createSequence()
*/
function dropSequence($seq_name)
{
return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name)
. ' RESTRICT');
}
// }}}
// {{{ 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, $params = array())
{
if (DB::isManip($query) || $this->_next_query_manip) {
return preg_replace('/^([\s(])*SELECT/i',
"\\1SELECT TOP($count)", $query);
} else {
return preg_replace('/([\s(])*SELECT/i',
"\\1SELECT TOP($from, $count)", $query);
}
}
// }}}
// {{{ quoteBoolean()
/**
* Formats a boolean value for use within a query in a locale-independent
* manner.
*
* @param boolean the boolean value to be quoted.
* @return string the quoted string.
* @see DB_common::quoteSmart()
* @since Method available since release 1.7.8.
*/
function quoteBoolean($boolean) {
return $boolean ? 'TRUE' : 'FALSE';
}
// }}}
// {{{ quoteFloat()
/**
* Formats a float value for use within a query in a locale-independent
* manner.
*
* @param float the float value to be quoted.
* @return string the quoted string.
* @see DB_common::quoteSmart()
* @since Method available since release 1.7.8.
*/
function quoteFloat($float) {
return $this->escapeSimple(str_replace(',', '.', strval(floatval($float))));
}
// }}}
// {{{ fbsqlRaiseError()
/**
* Produces a DB_Error object regarding the current problem
*
* @param int $errno if the error is being manually raised pass a
* DB_ERROR* constant here. If this isn't passed
* the error information gathered from the DBMS.
*
* @return object the DB_Error object
*
* @see DB_common::raiseError(),
* DB_fbsql::errorNative(), DB_common::errorCode()
*/
function fbsqlRaiseError($errno = null)
{
if ($errno === null) {
$errno = $this->errorCode(fbsql_errno($this->connection));
}
return $this->raiseError($errno, null, null, null,
@fbsql_error($this->connection));
}
// }}}
// {{{ errorNative()
/**
* Gets the DBMS' native error code produced by the last query
*
* @return int the DBMS' error code
*/
function errorNative()
{
return @fbsql_errno($this->connection);
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table or a result set
*
* @param object|string $result DB_result object from a query or a
* string containing the name of a table.
* While this also accepts a query result
* resource identifier, this behavior is
* deprecated.
* @param int $mode a valid tableInfo mode
*
* @return array an associative array with the information requested.
* A DB_Error object on failure.
*
* @see DB_common::tableInfo()
*/
function tableInfo($result, $mode = null)
{
if (is_string($result)) {
/*
* Probably received a table name.
* Create a result resource identifier.
*/
$id = @fbsql_list_fields($this->dsn['database'],
$result, $this->connection);
$got_string = true;
} elseif (isset($result->result)) {
/*
* Probably received a result object.
* Extract the result resource identifier.
*/
$id = $result->result;
$got_string = false;
} else {
/*
* Probably received a result resource identifier.
* Copy it.
* Deprecated. Here for compatibility only.
*/
$id = $result;
$got_string = false;
}
if (!is_resource($id)) {
return $this->fbsqlRaiseError(DB_ERROR_NEED_MORE_DATA);
}
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
$case_func = 'strtolower';
} else {
$case_func = 'strval';
}
$count = @fbsql_num_fields($id);
$res = array();
if ($mode) {
$res['num_fields'] = $count;
}
for ($i = 0; $i < $count; $i++) {
$res[$i] = array(
'table' => $case_func(@fbsql_field_table($id, $i)),
'name' => $case_func(@fbsql_field_name($id, $i)),
'type' => @fbsql_field_type($id, $i),
'len' => @fbsql_field_len($id, $i),
'flags' => @fbsql_field_flags($id, $i),
);
if ($mode & DB_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & DB_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
}
// free the result only if we were called on a table
if ($got_string) {
@fbsql_free_result($id);
}
return $res;
}
// }}}
// {{{ getSpecialQuery()
/**
* Obtains the query string needed for listing a given type of objects
*
* @param string $type the kind of objects you want to retrieve
*
* @return string the SQL query string or null if the driver doesn't
* support the object type requested
*
* @access protected
* @see DB_common::getListOf()
*/
function getSpecialQuery($type)
{
switch ($type) {
case 'tables':
return 'SELECT "table_name" FROM information_schema.tables'
. ' t0, information_schema.schemata t1'
. ' WHERE t0.schema_pk=t1.schema_pk AND'
. ' "table_type" = \'BASE TABLE\''
. ' AND "schema_name" = current_schema';
case 'views':
return 'SELECT "table_name" FROM information_schema.tables'
. ' t0, information_schema.schemata t1'
. ' WHERE t0.schema_pk=t1.schema_pk AND'
. ' "table_type" = \'VIEW\''
. ' AND "schema_name" = current_schema';
case 'users':
return 'SELECT "user_name" from information_schema.users';
case 'functions':
return 'SELECT "routine_name" FROM'
. ' information_schema.psm_routines'
. ' t0, information_schema.schemata t1'
. ' WHERE t0.schema_pk=t1.schema_pk'
. ' AND "routine_kind"=\'FUNCTION\''
. ' AND "schema_name" = current_schema';
case 'procedures':
return 'SELECT "routine_name" FROM'
. ' information_schema.psm_routines'
. ' t0, information_schema.schemata t1'
. ' WHERE t0.schema_pk=t1.schema_pk'
. ' AND "routine_kind"=\'PROCEDURE\''
. ' AND "schema_name" = current_schema';
default:
return null;
}
}
// }}}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
?>