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gnu-social/extlib/DB/ibase.php

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include external libs in a subdir to make install easier darcs-hash:20080822131714-84dde-6978424ded2ed1041a65142a25560654ac717fcd.gz
2008-08-22 09:17:14 -04:00
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* The PEAR DB driver for PHP's interbase extension
* for interacting with Interbase and Firebird databases
*
* While this class works with PHP 4, PHP's InterBase extension is
* unstable in PHP 4. Use PHP 5.
*
* PHP versions 4 and 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 Sterling Hughes <sterling@php.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
* @version CVS: $Id: ibase.php,v 1.116 2007/09/21 13:40:41 aharvey Exp $
* @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 interbase extension
* for interacting with Interbase and Firebird databases
*
* These methods overload the ones declared in DB_common.
*
* While this class works with PHP 4, PHP's InterBase extension is
* unstable in PHP 4. Use PHP 5.
*
* NOTICE: limitQuery() only works for Firebird.
*
* @category Database
* @package DB
* @author Sterling Hughes <sterling@php.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
* @version Release: 1.7.14RC1
* @link http://pear.php.net/package/DB
* @since Class became stable in Release 1.7.0
*/
class DB_ibase extends DB_common
{
// {{{ properties
/**
* The DB driver type (mysql, oci8, odbc, etc.)
* @var string
*/
var $phptype = 'ibase';
/**
* The database syntax variant to be used (db2, access, etc.), if any
* @var string
*/
var $dbsyntax = 'ibase';
/**
* 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
*
* NOTE: only firebird supports limit.
*
* @var array
*/
var $features = array(
'limit' => false,
'new_link' => false,
'numrows' => 'emulate',
'pconnect' => true,
'prepare' => true,
'ssl' => false,
'transactions' => true,
);
/**
* A mapping of native error codes to DB error codes
* @var array
*/
var $errorcode_map = array(
-104 => DB_ERROR_SYNTAX,
-150 => DB_ERROR_ACCESS_VIOLATION,
-151 => DB_ERROR_ACCESS_VIOLATION,
-155 => DB_ERROR_NOSUCHTABLE,
-157 => DB_ERROR_NOSUCHFIELD,
-158 => DB_ERROR_VALUE_COUNT_ON_ROW,
-170 => DB_ERROR_MISMATCH,
-171 => DB_ERROR_MISMATCH,
-172 => DB_ERROR_INVALID,
// -204 => // Covers too many errors, need to use regex on msg
-205 => DB_ERROR_NOSUCHFIELD,
-206 => DB_ERROR_NOSUCHFIELD,
-208 => DB_ERROR_INVALID,
-219 => DB_ERROR_NOSUCHTABLE,
-297 => DB_ERROR_CONSTRAINT,
-303 => DB_ERROR_INVALID,
-413 => DB_ERROR_INVALID_NUMBER,
-530 => DB_ERROR_CONSTRAINT,
-551 => DB_ERROR_ACCESS_VIOLATION,
-552 => DB_ERROR_ACCESS_VIOLATION,
// -607 => // Covers too many errors, need to use regex on msg
-625 => DB_ERROR_CONSTRAINT_NOT_NULL,
-803 => DB_ERROR_CONSTRAINT,
-804 => DB_ERROR_VALUE_COUNT_ON_ROW,
// -902 => // Covers too many errors, need to use regex on msg
-904 => DB_ERROR_CONNECT_FAILED,
-922 => DB_ERROR_NOSUCHDB,
-923 => DB_ERROR_CONNECT_FAILED,
-924 => DB_ERROR_CONNECT_FAILED
);
/**
* The raw database connection created by PHP
* @var resource
*/
var $connection;
/**
* The DSN information for connecting to a database
* @var array
*/
var $dsn = array();
/**
* The number of rows affected by a data manipulation query
* @var integer
* @access private
*/
var $affected = 0;
/**
* Should data manipulation queries be committed automatically?
* @var bool
* @access private
*/
var $autocommit = true;
/**
* The prepared statement handle from the most recently executed statement
*
* {@internal Mainly here because the InterBase/Firebird API is only
* able to retrieve data from result sets if the statemnt handle is
* still in scope.}}
*
* @var resource
*/
var $last_stmt;
/**
* Is the given prepared statement a data manipulation query?
* @var array
* @access private
*/
var $manip_query = array();
// }}}
// {{{ constructor
/**
* This constructor calls <kbd>$this->DB_common()</kbd>
*
* @return void
*/
function DB_ibase()
{
$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.
*
* PEAR DB's ibase driver supports the following extra DSN options:
* + buffers The number of database buffers to allocate for the
* server-side cache.
* + charset The default character set for a database.
* + dialect The default SQL dialect for any statement
* executed within a connection. Defaults to the
* highest one supported by client libraries.
* Functional only with InterBase 6 and up.
* + role Functional only with InterBase 5 and up.
*
* @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('interbase')) {
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
}
$this->dsn = $dsn;
if ($dsn['dbsyntax']) {
$this->dbsyntax = $dsn['dbsyntax'];
}
if ($this->dbsyntax == 'firebird') {
$this->features['limit'] = 'alter';
}
$params = array(
$dsn['hostspec']
? ($dsn['hostspec'] . ':' . $dsn['database'])
: $dsn['database'],
$dsn['username'] ? $dsn['username'] : null,
$dsn['password'] ? $dsn['password'] : null,
isset($dsn['charset']) ? $dsn['charset'] : null,
isset($dsn['buffers']) ? $dsn['buffers'] : null,
isset($dsn['dialect']) ? $dsn['dialect'] : null,
isset($dsn['role']) ? $dsn['role'] : null,
);
$connect_function = $persistent ? 'ibase_pconnect' : 'ibase_connect';
$this->connection = @call_user_func_array($connect_function, $params);
if (!$this->connection) {
return $this->ibaseRaiseError(DB_ERROR_CONNECT_FAILED);
}
return DB_OK;
}
// }}}
// {{{ disconnect()
/**
* Disconnects from the database server
*
* @return bool TRUE on success, FALSE on failure
*/
function disconnect()
{
$ret = @ibase_close($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)
{
$ismanip = $this->_checkManip($query);
$this->last_query = $query;
$query = $this->modifyQuery($query);
$result = @ibase_query($this->connection, $query);
if (!$result) {
return $this->ibaseRaiseError();
}
if ($this->autocommit && $ismanip) {
@ibase_commit($this->connection);
}
if ($ismanip) {
$this->affected = $result;
return DB_OK;
} else {
$this->affected = 0;
return $result;
}
}
// }}}
// {{{ modifyLimitQuery()
/**
* Adds LIMIT clauses to a query string according to current DBMS standards
*
* Only works with Firebird.
*
* @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, $params = array())
{
if ($this->dsn['dbsyntax'] == 'firebird') {
$query = preg_replace('/^([\s(])*SELECT/i',
"SELECT FIRST $count SKIP $from", $query);
}
return $query;
}
// }}}
// {{{ nextResult()
/**
* Move the internal ibase result pointer to the next available result
*
* @param a valid fbsql result resource
*
* @access public
*
* @return true if a result is available otherwise return false
*/
function nextResult($result)
{
return 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) {
return $this->ibaseRaiseError(DB_ERROR_NOT_CAPABLE);
}
if ($fetchmode & DB_FETCHMODE_ASSOC) {
if (function_exists('ibase_fetch_assoc')) {
$arr = @ibase_fetch_assoc($result);
} else {
$arr = get_object_vars(ibase_fetch_object($result));
}
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) {
$arr = array_change_key_case($arr, CASE_LOWER);
}
} else {
$arr = @ibase_fetch_row($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($result) ? ibase_free_result($result) : false;
}
// }}}
// {{{ freeQuery()
function freeQuery($query)
{
return is_resource($query) ? ibase_free_query($query) : false;
}
// }}}
// {{{ affectedRows()
/**
* Determines the number of rows affected by a data maniuplation query
*
* 0 is returned for queries that don't manipulate data.
*
* @return int the number of rows. A DB_Error object on failure.
*/
function affectedRows()
{
if (is_integer($this->affected)) {
return $this->affected;
}
return $this->ibaseRaiseError(DB_ERROR_NOT_CAPABLE);
}
// }}}
// {{{ 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)
{
$cols = @ibase_num_fields($result);
if (!$cols) {
return $this->ibaseRaiseError();
}
return $cols;
}
// }}}
// {{{ prepare()
/**
* Prepares a query for multiple execution with execute().
*
* prepare() requires a generic query as string like <code>
* INSERT INTO numbers VALUES (?, ?, ?)
* </code>. The <kbd>?</kbd> characters are placeholders.
*
* Three types of placeholders can be used:
* + <kbd>?</kbd> a quoted scalar value, i.e. strings, integers
* + <kbd>!</kbd> value is inserted 'as is'
* + <kbd>&</kbd> requires a file name. The file's contents get
* inserted into the query (i.e. saving binary
* data in a db)
*
* Use backslashes to escape placeholder characters if you don't want
* them to be interpreted as placeholders. Example: <code>
* "UPDATE foo SET col=? WHERE col='over \& under'"
* </code>
*
* @param string $query query to be prepared
* @return mixed DB statement resource on success. DB_Error on failure.
*/
function prepare($query)
{
$tokens = preg_split('/((?<!\\\)[&?!])/', $query, -1,
PREG_SPLIT_DELIM_CAPTURE);
$token = 0;
$types = array();
$newquery = '';
foreach ($tokens as $key => $val) {
switch ($val) {
case '?':
$types[$token++] = DB_PARAM_SCALAR;
break;
case '&':
$types[$token++] = DB_PARAM_OPAQUE;
break;
case '!':
$types[$token++] = DB_PARAM_MISC;
break;
default:
$tokens[$key] = preg_replace('/\\\([&?!])/', "\\1", $val);
$newquery .= $tokens[$key] . '?';
}
}
$newquery = substr($newquery, 0, -1);
$this->last_query = $query;
$newquery = $this->modifyQuery($newquery);
$stmt = @ibase_prepare($this->connection, $newquery);
if ($stmt === false) {
$stmt = $this->ibaseRaiseError();
} else {
$this->prepare_types[(int)$stmt] = $types;
$this->manip_query[(int)$stmt] = DB::isManip($query);
}
return $stmt;
}
// }}}
// {{{ execute()
/**
* Executes a DB statement prepared with prepare().
*
* @param resource $stmt a DB statement resource returned from prepare()
* @param mixed $data array, string or numeric data to be used in
* execution of the statement. Quantity of items
* passed must match quantity of placeholders in
* query: meaning 1 for non-array items or the
* quantity of elements in the array.
* @return object a new DB_Result or a DB_Error when fail
* @see DB_ibase::prepare()
* @access public
*/
function &execute($stmt, $data = array())
{
$data = (array)$data;
$this->last_parameters = $data;
$types = $this->prepare_types[(int)$stmt];
if (count($types) != count($data)) {
$tmp = $this->raiseError(DB_ERROR_MISMATCH);
return $tmp;
}
$i = 0;
foreach ($data as $key => $value) {
if ($types[$i] == DB_PARAM_MISC) {
/*
* ibase doesn't seem to have the ability to pass a
* parameter along unchanged, so strip off quotes from start
* and end, plus turn two single quotes to one single quote,
* in order to avoid the quotes getting escaped by
* ibase and ending up in the database.
*/
$data[$key] = preg_replace("/^'(.*)'$/", "\\1", $data[$key]);
$data[$key] = str_replace("''", "'", $data[$key]);
} elseif ($types[$i] == DB_PARAM_OPAQUE) {
$fp = @fopen($data[$key], 'rb');
if (!$fp) {
$tmp = $this->raiseError(DB_ERROR_ACCESS_VIOLATION);
return $tmp;
}
$data[$key] = fread($fp, filesize($data[$key]));
fclose($fp);
}
$i++;
}
array_unshift($data, $stmt);
$res = call_user_func_array('ibase_execute', $data);
if (!$res) {
$tmp = $this->ibaseRaiseError();
return $tmp;
}
/* XXX need this?
if ($this->autocommit && $this->manip_query[(int)$stmt]) {
@ibase_commit($this->connection);
}*/
$this->last_stmt = $stmt;
if ($this->manip_query[(int)$stmt] || $this->_next_query_manip) {
$this->_last_query_manip = true;
$this->_next_query_manip = false;
$tmp = DB_OK;
} else {
$this->_last_query_manip = false;
$tmp = new DB_result($this, $res);
}
return $tmp;
}
/**
* Frees the internal resources associated with a prepared query
*
* @param resource $stmt the prepared statement's PHP resource
* @param bool $free_resource should the PHP resource be freed too?
* Use false if you need to get data
* from the result set later.
*
* @return bool TRUE on success, FALSE if $result is invalid
*
* @see DB_ibase::prepare()
*/
function freePrepared($stmt, $free_resource = true)
{
if (!is_resource($stmt)) {
return false;
}
if ($free_resource) {
@ibase_free_query($stmt);
}
unset($this->prepare_tokens[(int)$stmt]);
unset($this->prepare_types[(int)$stmt]);
unset($this->manip_query[(int)$stmt]);
return true;
}
// }}}
// {{{ 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)
{
$this->autocommit = $onoff ? 1 : 0;
return DB_OK;
}
// }}}
// {{{ commit()
/**
* Commits the current transaction
*
* @return int DB_OK on success. A DB_Error object on failure.
*/
function commit()
{
return @ibase_commit($this->connection);
}
// }}}
// {{{ rollback()
/**
* Reverts the current transaction
*
* @return int DB_OK on success. A DB_Error object on failure.
*/
function rollback()
{
return @ibase_rollback($this->connection);
}
// }}}
// {{{ transactionInit()
function transactionInit($trans_args = 0)
{
return $trans_args
? @ibase_trans($trans_args, $this->connection)
: @ibase_trans();
}
// }}}
// {{{ nextId()
/**
* Returns the next free id in a sequence
*
* @param string $seq_name name of the sequence
* @param boolean $ondemand when true, the seqence is automatically
* created if it does not exist
*
* @return int the next id number in the sequence.
* A DB_Error object on failure.
*
* @see DB_common::nextID(), DB_common::getSequenceName(),
* DB_ibase::createSequence(), DB_ibase::dropSequence()
*/
function nextId($seq_name, $ondemand = true)
{
$sqn = strtoupper($this->getSequenceName($seq_name));
$repeat = 0;
do {
$this->pushErrorHandling(PEAR_ERROR_RETURN);
$result = $this->query("SELECT GEN_ID(${sqn}, 1) "
. 'FROM RDB$GENERATORS '
. "WHERE RDB\$GENERATOR_NAME='${sqn}'");
$this->popErrorHandling();
if ($ondemand && DB::isError($result)) {
$repeat = 1;
$result = $this->createSequence($seq_name);
if (DB::isError($result)) {
return $result;
}
} else {
$repeat = 0;
}
} while ($repeat);
if (DB::isError($result)) {
return $this->raiseError($result);
}
$arr = $result->fetchRow(DB_FETCHMODE_ORDERED);
$result->free();
return $arr[0];
}
// }}}
// {{{ createSequence()
/**
* Creates a new sequence
*
* @param string $seq_name name of the new sequence
*
* @return int DB_OK on success. A DB_Error object on failure.
*
* @see DB_common::createSequence(), DB_common::getSequenceName(),
* DB_ibase::nextID(), DB_ibase::dropSequence()
*/
function createSequence($seq_name)
{
$sqn = strtoupper($this->getSequenceName($seq_name));
$this->pushErrorHandling(PEAR_ERROR_RETURN);
$result = $this->query("CREATE GENERATOR ${sqn}");
$this->popErrorHandling();
return $result;
}
// }}}
// {{{ dropSequence()
/**
* Deletes a sequence
*
* @param string $seq_name name of the sequence to be deleted
*
* @return int DB_OK on success. A DB_Error object on failure.
*
* @see DB_common::dropSequence(), DB_common::getSequenceName(),
* DB_ibase::nextID(), DB_ibase::createSequence()
*/
function dropSequence($seq_name)
{
return $this->query('DELETE FROM RDB$GENERATORS '
. "WHERE RDB\$GENERATOR_NAME='"
. strtoupper($this->getSequenceName($seq_name))
. "'");
}
// }}}
// {{{ _ibaseFieldFlags()
/**
* Get the column's flags
*
* Supports "primary_key", "unique_key", "not_null", "default",
* "computed" and "blob".
*
* @param string $field_name the name of the field
* @param string $table_name the name of the table
*
* @return string the flags
*
* @access private
*/
function _ibaseFieldFlags($field_name, $table_name)
{
$sql = 'SELECT R.RDB$CONSTRAINT_TYPE CTYPE'
.' FROM RDB$INDEX_SEGMENTS I'
.' JOIN RDB$RELATION_CONSTRAINTS R ON I.RDB$INDEX_NAME=R.RDB$INDEX_NAME'
.' WHERE I.RDB$FIELD_NAME=\'' . $field_name . '\''
.' AND UPPER(R.RDB$RELATION_NAME)=\'' . strtoupper($table_name) . '\'';
$result = @ibase_query($this->connection, $sql);
if (!$result) {
return $this->ibaseRaiseError();
}
$flags = '';
if ($obj = @ibase_fetch_object($result)) {
@ibase_free_result($result);
if (isset($obj->CTYPE) && trim($obj->CTYPE) == 'PRIMARY KEY') {
$flags .= 'primary_key ';
}
if (isset($obj->CTYPE) && trim($obj->CTYPE) == 'UNIQUE') {
$flags .= 'unique_key ';
}
}
$sql = 'SELECT R.RDB$NULL_FLAG AS NFLAG,'
.' R.RDB$DEFAULT_SOURCE AS DSOURCE,'
.' F.RDB$FIELD_TYPE AS FTYPE,'
.' F.RDB$COMPUTED_SOURCE AS CSOURCE'
.' FROM RDB$RELATION_FIELDS R '
.' JOIN RDB$FIELDS F ON R.RDB$FIELD_SOURCE=F.RDB$FIELD_NAME'
.' WHERE UPPER(R.RDB$RELATION_NAME)=\'' . strtoupper($table_name) . '\''
.' AND R.RDB$FIELD_NAME=\'' . $field_name . '\'';
$result = @ibase_query($this->connection, $sql);
if (!$result) {
return $this->ibaseRaiseError();
}
if ($obj = @ibase_fetch_object($result)) {
@ibase_free_result($result);
if (isset($obj->NFLAG)) {
$flags .= 'not_null ';
}
if (isset($obj->DSOURCE)) {
$flags .= 'default ';
}
if (isset($obj->CSOURCE)) {
$flags .= 'computed ';
}
if (isset($obj->FTYPE) && $obj->FTYPE == 261) {
$flags .= 'blob ';
}
}
return trim($flags);
}
// }}}
// {{{ ibaseRaiseError()
/**
* Produces a DB_Error object regarding the current problem
*
* @param int $errno if the error is being manually raised pass a
* DB_ERROR* constant here. If this isn't passed
* the error information gathered from the DBMS.
*
* @return object the DB_Error object
*
* @see DB_common::raiseError(),
* DB_ibase::errorNative(), DB_ibase::errorCode()
*/
function &ibaseRaiseError($errno = null)
{
if ($errno === null) {
$errno = $this->errorCode($this->errorNative());
}
$tmp = $this->raiseError($errno, null, null, null, @ibase_errmsg());
return $tmp;
}
// }}}
// {{{ errorNative()
/**
* Gets the DBMS' native error code produced by the last query
*
* @return int the DBMS' error code. NULL if there is no error code.
*
* @since Method available since Release 1.7.0
*/
function errorNative()
{
if (function_exists('ibase_errcode')) {
return @ibase_errcode();
}
if (preg_match('/^Dynamic SQL Error SQL error code = ([0-9-]+)/i',
@ibase_errmsg(), $m)) {
return (int)$m[1];
}
return null;
}
// }}}
// {{{ errorCode()
/**
* Maps native error codes to DB's portable ones
*
* @param int $nativecode the error code returned by the DBMS
*
* @return int the portable DB error code. Return DB_ERROR if the
* current driver doesn't have a mapping for the
* $nativecode submitted.
*
* @since Method available since Release 1.7.0
*/
function errorCode($nativecode = null)
{
if (isset($this->errorcode_map[$nativecode])) {
return $this->errorcode_map[$nativecode];
}
static $error_regexps;
if (!isset($error_regexps)) {
$error_regexps = array(
'/generator .* is not defined/'
=> DB_ERROR_SYNTAX, // for compat. w ibase_errcode()
'/table.*(not exist|not found|unknown)/i'
=> DB_ERROR_NOSUCHTABLE,
'/table .* already exists/i'
=> DB_ERROR_ALREADY_EXISTS,
'/unsuccessful metadata update .* failed attempt to store duplicate value/i'
=> DB_ERROR_ALREADY_EXISTS,
'/unsuccessful metadata update .* not found/i'
=> DB_ERROR_NOT_FOUND,
'/validation error for column .* value "\*\*\* null/i'
=> DB_ERROR_CONSTRAINT_NOT_NULL,
'/violation of [\w ]+ constraint/i'
=> DB_ERROR_CONSTRAINT,
'/conversion error from string/i'
=> DB_ERROR_INVALID_NUMBER,
'/no permission for/i'
=> DB_ERROR_ACCESS_VIOLATION,
'/arithmetic exception, numeric overflow, or string truncation/i'
=> DB_ERROR_INVALID,
'/feature is not supported/i'
=> DB_ERROR_NOT_CAPABLE,
);
}
$errormsg = @ibase_errmsg();
foreach ($error_regexps as $regexp => $code) {
if (preg_match($regexp, $errormsg)) {
return $code;
}
}
return DB_ERROR;
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table or a result set
*
* NOTE: only supports 'table' and 'flags' if <var>$result</var>
* is a table name.
*
* @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.
*/
$id = @ibase_query($this->connection,
"SELECT * FROM $result WHERE 1=0");
$got_string = true;
} elseif (isset($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 $this->ibaseRaiseError(DB_ERROR_NEED_MORE_DATA);
}
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
$case_func = 'strtolower';
} else {
$case_func = 'strval';
}
$count = @ibase_num_fields($id);
$res = array();
if ($mode) {
$res['num_fields'] = $count;
}
for ($i = 0; $i < $count; $i++) {
$info = @ibase_field_info($id, $i);
$res[$i] = array(
'table' => $got_string ? $case_func($result) : '',
'name' => $case_func($info['name']),
'type' => $info['type'],
'len' => $info['length'],
'flags' => ($got_string)
? $this->_ibaseFieldFlags($info['name'], $result)
: '',
);
if ($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) {
@ibase_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 ($type) {
case 'tables':
return 'SELECT DISTINCT R.RDB$RELATION_NAME FROM '
. 'RDB$RELATION_FIELDS R WHERE R.RDB$SYSTEM_FLAG=0';
case 'views':
return 'SELECT DISTINCT RDB$VIEW_NAME from RDB$VIEW_RELATIONS';
case 'users':
return 'SELECT DISTINCT RDB$USER FROM RDB$USER_PRIVILEGES';
default:
return null;
}
}
// }}}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
?>
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