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Diffstat (limited to 'extlib/DB/ibase.php')
| -rw-r--r-- | extlib/DB/ibase.php | 1082 |
1 files changed, 1082 insertions, 0 deletions
diff --git a/extlib/DB/ibase.php b/extlib/DB/ibase.php new file mode 100644 index 000000000..ee19c5589 --- /dev/null +++ b/extlib/DB/ibase.php @@ -0,0 +1,1082 @@ +<?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: + */ + +?> |