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<?php
// vim: set et ts=4 sw=4 fdm=marker:
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// | POSSIBILITY OF SUCH DAMAGE. |
// +----------------------------------------------------------------------+
// | Author: Lukas Smith <smith@backendmedia.com> |
// +----------------------------------------------------------------------+
//
// $Id: mysql.php,v 1.80.4.18 2004/04/22 11:31:56 lsmith Exp $
//
require_once('MDB/Common.php');
/**
* MDB MySQL driver
*
* Notes:
* - The decimal type fields are emulated with integer fields.
*
* @package MDB
* @category Database
* @author Lukas Smith <smith@backendmedia.com>
*/
class MDB_mysql extends MDB_Common
{
// {{{ properties
var $connection = 0;
var $connected_host;
var $connected_user;
var $connected_password;
var $connected_port;
var $opened_persistent = '';
var $escape_quotes = "\\";
var $decimal_factor = 1.0;
var $highest_fetched_row = array();
var $columns = array();
// MySQL specific class variable
var $default_table_type = '';
var $fixed_float = 0;
var $dummy_primary_key = 'dummy_primary_key';
// }}}
// {{{ constructor
/**
* Constructor
*/
function MDB_mysql()
{
$this->MDB_Common();
$this->phptype = 'mysql';
$this->dbsyntax = 'mysql';
$this->supported['Sequences'] = 1;
$this->supported['Indexes'] = 1;
$this->supported['AffectedRows'] = 1;
$this->supported['Summaryfunctions'] = 1;
$this->supported['OrderByText'] = 1;
$this->supported['CurrId'] = 1;
$this->supported['SelectRowRanges'] = 1;
$this->supported['LOBs'] = 1;
$this->supported['Replace'] = 1;
$this->supported['SubSelects'] = 0;
$this->supported['Transactions'] = 0;
$this->decimal_factor = pow(10.0, $this->decimal_places);
$this->options['DefaultTableType'] = FALSE;
$this->options['fixed_float'] = FALSE;
$this->errorcode_map = array(
1004 => MDB_ERROR_CANNOT_CREATE,
1005 => MDB_ERROR_CANNOT_CREATE,
1006 => MDB_ERROR_CANNOT_CREATE,
1007 => MDB_ERROR_ALREADY_EXISTS,
1008 => MDB_ERROR_CANNOT_DROP,
1022 => MDB_ERROR_ALREADY_EXISTS,
1046 => MDB_ERROR_NODBSELECTED,
1050 => MDB_ERROR_ALREADY_EXISTS,
1051 => MDB_ERROR_NOSUCHTABLE,
1054 => MDB_ERROR_NOSUCHFIELD,
1062 => MDB_ERROR_ALREADY_EXISTS,
1064 => MDB_ERROR_SYNTAX,
1100 => MDB_ERROR_NOT_LOCKED,
1136 => MDB_ERROR_VALUE_COUNT_ON_ROW,
1146 => MDB_ERROR_NOSUCHTABLE,
1048 => MDB_ERROR_CONSTRAINT,
1213 => MDB_ERROR_DEADLOCK,
1216 => MDB_ERROR_CONSTRAINT,
);
}
// }}}
// {{{ errorNative()
/**
* Get the native error code of the last error (if any) that
* occured on the current connection.
*
* @access public
*
* @return int native MySQL error code
*/
function errorNative()
{
return(@mysql_errno($this->connection));
}
// }}}
// {{{ mysqlRaiseError()
/**
* This method is used to communicate an error and invoke error
* callbacks etc. Basically a wrapper for MDB::raiseError
* that checks for native error msgs.
*
* @param integer $errno error code
* @param string $message userinfo message
* @return object a PEAR error object
* @access public
* @see PEAR_Error
*/
function mysqlRaiseError($errno = NULL, $message = NULL)
{
if ($errno == NULL) {
if ($this->connection) {
$errno = @mysql_errno($this->connection);
} else {
$errno = @mysql_errno();
}
}
if ($this->connection) {
$error = @mysql_errno($this->connection);
} else {
$error = @mysql_error();
}
return($this->raiseError($this->errorCode($errno), NULL, NULL,
$message, $error));
}
// }}}
// {{{ quoteIdentifier()
/**
* Quote a string so it can be safely used as a table or column name
*
* Quoting style depends on which database driver is being used.
*
* MySQL can't handle the backtick character (<kbd>`</kbd>) in
* table or column names.
*
* @param string $str identifier name to be quoted
*
* @return string quoted identifier string
*
* @access public
* @internal
*/
function quoteIdentifier($str)
{
return '`' . $str . '`';
}
// }}}
// {{{ autoCommit()
/**
* Define whether database changes done on the database be automatically
* committed. This function may also implicitly start or end a transaction.
*
* @param boolean $auto_commit flag that indicates whether the database
* changes should be committed right after
* executing every query statement. If this
* argument is 0 a transaction implicitly
* started. Otherwise, if a transaction is
* in progress it is ended by committing any
* database changes that were pending.
*
* @access public
*
* @return mixed MDB_OK on success, a MDB error on failure
*/
function autoCommit($auto_commit)
{
$this->debug("AutoCommit: ".($auto_commit ? "On" : "Off"));
if (!isset($this->supported['Transactions'])) {
return($this->raiseError(MDB_ERROR_UNSUPPORTED, NULL, NULL,
'Auto-commit transactions: transactions are not in use'));
}
if ($this->auto_commit == $auto_commit) {
return(MDB_OK);
}
if ($this->connection) {
if ($auto_commit) {
$result = $this->query('COMMIT');
if (MDB::isError($result)) {
return($result);
}
$result = $this->query('SET AUTOCOMMIT = 1');
if (MDB::isError($result)) {
return($result);
}
} else {
$result = $this->query('SET AUTOCOMMIT = 0');
if (MDB::isError($result)) {
return($result);
}
}
}
$this->auto_commit = $auto_commit;
$this->in_transaction = !$auto_commit;
return(MDB_OK);
}
// }}}
// {{{ commit()
/**
* Commit the database changes done during a transaction that is in
* progress. This function may only be called when auto-committing is
* disabled, otherwise it will fail. Therefore, a new transaction is
* implicitly started after committing the pending changes.
*
* @access public
*
* @return mixed MDB_OK on success, a MDB error on failure
*/
function commit()
{
$this->debug("Commit Transaction");
if (!isset($this->supported['Transactions'])) {
return($this->raiseError(MDB_ERROR_UNSUPPORTED, NULL, NULL,
'Commit transactions: transactions are not in use'));
}
if ($this->auto_commit) {
return($this->raiseError(MDB_ERROR, NULL, NULL,
'Commit transactions: transaction changes are being auto commited'));
}
return($this->query('COMMIT'));
}
// }}}
// {{{ rollback()
/**
* Cancel any database changes done during a transaction that is in
* progress. This function may only be called when auto-committing is
* disabled, otherwise it will fail. Therefore, a new transaction is
* implicitly started after canceling the pending changes.
*
* @access public
*
* @return mixed MDB_OK on success, a MDB error on failure
*/
function rollback()
{
$this->debug("Rollback Transaction");
if (!isset($this->supported['Transactions'])) {
return($this->raiseError(MDB_ERROR_UNSUPPORTED, NULL, NULL,
'Rollback transactions: transactions are not in use'));
}
if ($this->auto_commit) {
return($this->raiseError(MDB_ERROR, NULL, NULL,
'Rollback transactions: transactions can not be rolled back when changes are auto commited'));
}
return($this->query('ROLLBACK'));
}
// }}}
// {{{ connect()
/**
* Connect to the database
*
* @return TRUE on success, MDB_Error on failure
**/
function connect()
{
$port = (isset($this->port) ? $this->port : '');
if($this->connection != 0) {
if (!strcmp($this->connected_host, $this->host)
&& !strcmp($this->connected_user, $this->user)
&& !strcmp($this->connected_password, $this->password)
&& !strcmp($this->connected_port, $port)
&& $this->opened_persistent == $this->options['persistent'])
{
return(MDB_OK);
}
@mysql_close($this->connection);
$this->connection = 0;
$this->affected_rows = -1;
}
if(!PEAR::loadExtension($this->phptype)) {
return(PEAR::raiseError(NULL, MDB_ERROR_NOT_FOUND,
NULL, NULL, 'extension '.$this->phptype.' is not compiled into PHP',
'MDB_Error', TRUE));
}
$UseTransactions = $this->getOption('UseTransactions');
if(!MDB::isError($UseTransactions) && $UseTransactions) {
$this->supported['Transactions'] = 1;
$this->default_table_type = 'BDB';
} else {
$this->supported['Transactions'] = 0;
$this->default_table_type = '';
}
$DefaultTableType = $this->getOption('DefaultTableType');
if(!MDB::isError($DefaultTableType) && $DefaultTableType) {
switch($this->default_table_type = strtoupper($DefaultTableType)) {
case 'BERKELEYDB':
$this->default_table_type = 'BDB';
case 'BDB':
case 'INNODB':
case 'GEMINI':
break;
case 'HEAP':
case 'ISAM':
case 'MERGE':
case 'MRG_MYISAM':
case 'MYISAM':
if(isset($this->supported['Transactions'])) {
$this->warnings[] = $DefaultTableType
.' is not a transaction-safe default table type';
}
break;
default:
$this->warnings[] = $DefaultTableType
.' is not a supported default table type';
}
}
$this->fixed_float = 30;
$function = ($this->options['persistent'] ? 'mysql_pconnect' : 'mysql_connect');
if (!function_exists($function)) {
return($this->raiseError(MDB_ERROR_UNSUPPORTED));
}
@ini_set('track_errors', TRUE);
$this->connection = @$function(
$this->host.(!strcmp($port,'') ? '' : ':'.$port),
$this->user, $this->password);
@ini_restore('track_errors');
if ($this->connection <= 0) {
return($this->raiseError(MDB_ERROR_CONNECT_FAILED, NULL, NULL,
$php_errormsg));
}
if (isset($this->options['fixedfloat'])) {
$this->fixed_float = $this->options['fixedfloat'];
} else {
if (($result = @mysql_query('SELECT VERSION()', $this->connection))) {
$version = explode('.', @mysql_result($result,0,0));
$major = intval($version[0]);
$minor = intval($version[1]);
$revision = intval($version[2]);
if ($major > 3 || ($major == 3 && $minor >= 23
&& ($minor > 23 || $revision >= 6)))
{
$this->fixed_float = 0;
}
@mysql_free_result($result);
}
}
if (isset($this->supported['Transactions']) && !$this->auto_commit) {
if (!@mysql_query('SET AUTOCOMMIT = 0', $this->connection)) {
@mysql_close($this->connection);
$this->connection = 0;
$this->affected_rows = -1;
return($this->raiseError());
}
$this->in_transaction = TRUE;
}
$this->connected_host = $this->host;
$this->connected_user = $this->user;
$this->connected_password = $this->password;
$this->connected_port = $port;
$this->opened_persistent = $this->getoption('persistent');
return(MDB_OK);
}
// }}}
// {{{ _close()
/**
* all the RDBMS specific things needed close a DB connection
*
* @return boolean
* @access private
**/
function _close()
{
if ($this->connection != 0) {
if (isset($this->supported['Transactions']) && !$this->auto_commit) {
$result = $this->autoCommit(TRUE);
}
@mysql_close($this->connection);
$this->connection = 0;
$this->affected_rows = -1;
if (isset($result) && MDB::isError($result)) {
return($result);
}
unset($GLOBALS['_MDB_databases'][$this->database]);
return(TRUE);
}
return(FALSE);
}
// }}}
// {{{ query()
/**
* Send a query to the database and return any results
*
* @access public
*
* @param string $query the SQL query
* @param mixed $types array that contains the types of the columns in
* the result set
*
* @return mixed a result handle or MDB_OK on success, a MDB error on failure
*/
function query($query, $types = NULL)
{
$this->debug("Query: $query");
$ismanip = MDB::isManip($query);
$this->last_query = $query;
$first = $this->first_selected_row;
$limit = $this->selected_row_limit;
$this->first_selected_row = $this->selected_row_limit = 0;
$result = $this->connect();
if (MDB::isError($result)) {
return($result);
}
if($limit > 0) {
if ($ismanip) {
$query .= " LIMIT $limit";
} else {
$query .= " LIMIT $first,$limit";
}
}
if ($this->database_name) {
if(!@mysql_select_db($this->database_name, $this->connection)) {
return($this->mysqlRaiseError());
}
}
if ($result = @mysql_query($query, $this->connection)) {
if ($ismanip) {
$this->affected_rows = @mysql_affected_rows($this->connection);
return(MDB_OK);
} else {
$result_value = intval($result);
$this->highest_fetched_row[$result_value] = -1;
if ($types != NULL) {
if (!is_array($types)) {
$types = array($types);
}
if (MDB::isError($err = $this->setResultTypes($result, $types))) {
$this->freeResult($result);
return($err);
}
}
return($result);
}
}
return($this->mysqlRaiseError());
}
// }}}
// {{{ subSelect()
/**
* simple subselect emulation for Mysql
*
* @access public
*
* @param string $query the SQL query for the subselect that may only
* return a column
* @param string $quote determines if the data needs to be quoted before
* being returned
*
* @return string the query
*/
function subSelect($query, $quote = FALSE)
{
if($this->supported['SubSelects'] == 1) {
return($query);
}
$col = $this->queryCol($query);
if (MDB::isError($col)) {
return($col);
}
if(!is_array($col) || count($col) == 0) {
return 'NULL';
}
if($quote) {
for($i = 0, $j = count($col); $i < $j; ++$i) {
$col[$i] = $this->getTextValue($col[$i]);
}
}
return(implode(', ', $col));
}
// }}}
// {{{ replace()
/**
* Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
* query, except that if there is already a row in the table with the same
* key field values, the REPLACE query just updates its values instead of
* inserting a new row.
*
* The REPLACE type of query does not make part of the SQL standards. Since
* practically only MySQL implements it natively, this type of query is
* emulated through this method for other DBMS using standard types of
* queries inside a transaction to assure the atomicity of the operation.
*
* @access public
*
* @param string $table name of the table on which the REPLACE query will
* be executed.
* @param array $fields associative array that describes the fields and the
* values that will be inserted or updated in the specified table. The
* indexes of the array are the names of all the fields of the table. The
* values of the array are also associative arrays that describe the
* values and other properties of the table fields.
*
* Here follows a list of field properties that need to be specified:
*
* Value:
* Value to be assigned to the specified field. This value may be
* of specified in database independent type format as this
* function can perform the necessary datatype conversions.
*
* Default:
* this property is required unless the Null property
* is set to 1.
*
* Type
* Name of the type of the field. Currently, all types Metabase
* are supported except for clob and blob.
*
* Default: no type conversion
*
* Null
* Boolean property that indicates that the value for this field
* should be set to NULL.
*
* The default value for fields missing in INSERT queries may be
* specified the definition of a table. Often, the default value
* is already NULL, but since the REPLACE may be emulated using
* an UPDATE query, make sure that all fields of the table are
* listed in this function argument array.
*
* Default: 0
*
* Key
* Boolean property that indicates that this field should be
* handled as a primary key or at least as part of the compound
* unique index of the table that will determine the row that will
* updated if it exists or inserted a new row otherwise.
*
* This function will fail if no key field is specified or if the
* value of a key field is set to NULL because fields that are
* part of unique index they may not be NULL.
*
* Default: 0
*
* @return mixed MDB_OK on success, a MDB error on failure
*/
function replace($table, $fields)
{
$count = count($fields);
for($keys = 0, $query = $values = '',reset($fields), $field = 0;
$field<$count;
next($fields), $field++)
{
$name = key($fields);
if ($field > 0) {
$query .= ',';
$values .= ',';
}
$query .= $name;
if (isset($fields[$name]['Null']) && $fields[$name]['Null']) {
$value = 'NULL';
} else {
if(isset($fields[$name]['Type'])) {
switch ($fields[$name]['Type']) {
case 'text':
$value = $this->getTextValue($fields[$name]['Value']);
break;
case 'boolean':
$value = $this->getBooleanValue($fields[$name]['Value']);
break;
case 'integer':
$value = $this->getIntegerValue($fields[$name]['Value']);
break;
case 'decimal':
$value = $this->getDecimalValue($fields[$name]['Value']);
break;
case 'float':
$value = $this->getFloatValue($fields[$name]['Value']);
break;
case 'date':
$value = $this->getDateValue($fields[$name]['Value']);
break;
case 'time':
$value = $this->getTimeValue($fields[$name]['Value']);
break;
case 'timestamp':
$value = $this->getTimestampValue($fields[$name]['Value']);
break;
default:
return($this->raiseError(MDB_ERROR_CANNOT_REPLACE, NULL, NULL,
'no supported type for field "' . $name . '" specified'));
}
} else {
$value = $fields[$name]['Value'];
}
}
$values .= $value;
if (isset($fields[$name]['Key']) && $fields[$name]['Key']) {
if ($value === 'NULL') {
return($this->raiseError(MDB_ERROR_CANNOT_REPLACE, NULL, NULL,
$name.': key values may not be NULL'));
}
$keys++;
}
}
if ($keys == 0) {
return($this->raiseError(MDB_ERROR_CANNOT_REPLACE, NULL, NULL,
'not specified which fields are keys'));
}
return($this->query("REPLACE INTO $table ($query) VALUES ($values)"));
}
// }}}
// {{{ getColumnNames()
/**
* Retrieve the names of columns returned by the DBMS in a query result.
*
* @param resource $result result identifier
* @return mixed an associative array variable
* that will hold the names of columns. The
* indexes of the array are the column names
* mapped to lower case and the values are the
* respective numbers of the columns starting
* from 0. Some DBMS may not return any
* columns when the result set does not
* contain any rows.
*
* a MDB error on failure
* @access public
*/
function getColumnNames($result)
{
$result_value = intval($result);
if (!isset($this->highest_fetched_row[$result_value])) {
return($this->raiseError(MDB_ERROR_INVALID, NULL, NULL,
'Get column names: it was specified an inexisting result set'));
}
if (!isset($this->columns[$result_value])) {
$this->columns[$result_value] = array();
$columns = @mysql_num_fields($result);
for($column = 0; $column < $columns; $column++) {
$field_name = @mysql_field_name($result, $column);
if ($this->options['optimize'] == 'portability') {
$field_name = strtolower($field_name);
}
$this->columns[$result_value][$field_name] = $column;
}
}
return($this->columns[$result_value]);
}
// }}}
// {{{ numCols()
/**
* Count the number of columns returned by the DBMS in a query result.
*
* @param resource $result result identifier
* @access public
* @return mixed integer value with the number of columns, a MDB error
* on failure
*/
function numCols($result)
{
$result_value = intval($result);
if (!isset($this->highest_fetched_row[$result_value])) {
return($this->raiseError(MDB_ERROR_INVALID, NULL, NULL,
'numCols: it was specified an inexisting result set'));
}
return(@mysql_num_fields($result));
}
// }}}
// {{{ endOfResult()
/**
* check if the end of the result set has been reached
*
* @param resource $result result identifier
* @return mixed TRUE or FALSE on sucess, a MDB error on failure
* @access public
*/
function endOfResult($result)
{
$result_value = intval($result);
if (!isset($this->highest_fetched_row[$result_value])) {
return($this->raiseError(MDB_ERROR, NULL, NULL,
'End of result: attempted to check the end of an unknown result'));
}
return($this->highest_fetched_row[$result_value] >= $this->numRows($result)-1);
}
// }}}
// {{{ fetch()
/**
* fetch value from a result set
*
* @param resource $result result identifier
* @param int $row number of the row where the data can be found
* @param int $field field number where the data can be found
* @return mixed string on success, a MDB error on failure
* @access public
*/
function fetch($result, $row, $field)
{
$result_value = intval($result);
$this->highest_fetched_row[$result_value] =
max($this->highest_fetched_row[$result_value], $row);
$res = @mysql_result($result, $row, $field);
if ($res === FALSE && $res != NULL) {
return($this->mysqlRaiseError());
}
return($res);
}
// }}}
// {{{ fetchClob()
/**
* fetch a clob value from a result set
*
* @param resource $result result identifier
* @param int $row number of the row where the data can be found
* @param int $field field number where the data can be found
* @return mixed content of the specified data cell, a MDB error on failure,
* a MDB error on failure
* @access public
*/
function fetchClob($result, $row, $field)
{
return($this->fetchLob($result, $row, $field));
}
// }}}
// {{{ fetchBlob()
/**
* fetch a blob value from a result set
*
* @param resource $result result identifier
* @param int $row number of the row where the data can be found
* @param int $field field number where the data can be found
* @return mixed content of the specified data cell, a MDB error on failure
* @access public
*/
function fetchBlob($result, $row, $field)
{
return($this->fetchLob($result, $row, $field));
}
// }}}
// {{{ convertResult()
/**
* convert a value to a RDBMS indepdenant MDB type
*
* @param mixed $value value to be converted
* @param int $type constant that specifies which type to convert to
* @return mixed converted value
* @access public
*/
function convertResult($value, $type)
{
switch($type) {
case MDB_TYPE_DECIMAL:
return(sprintf('%.'.$this->decimal_places.'f', doubleval($value)/$this->decimal_factor));
default:
return($this->_baseConvertResult($value, $type));
}
}
// }}}
// {{{ numRows()
/**
* returns the number of rows in a result object
*
* @param ressource $result a valid result ressouce pointer
* @return mixed MDB_Error or the number of rows
* @access public
*/
function numRows($result)
{
return(@mysql_num_rows($result));
}
// }}}
// {{{ freeResult()
/**
* Free the internal resources associated with $result.
*
* @param $result result identifier
* @return boolean TRUE on success, FALSE if $result is invalid
* @access public
*/
function freeResult($result)
{
$result_value = intval($result);
if(isset($this->highest_fetched_row[$result_value])) {
unset($this->highest_fetched_row[$result_value]);
}
if(isset($this->columns[$result_value])) {
unset($this->columns[$result_value]);
}
if(isset($this->result_types[$result_value])) {
unset($this->result_types[$result_value]);
}
return(@mysql_free_result($result));
}
// }}}
// {{{ getIntegerDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an integer type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes.
* Currently, the types of supported field
* properties are as follows:
*
* unsigned
* Boolean flag that indicates whether the field
* should be declared as unsigned integer if
* possible.
*
* default
* Integer value to be used as default for this
* field.
*
* notnull
* Boolean flag that indicates whether this field is
* constrained to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getIntegerDeclaration($name, $field)
{
return("$name INT".
(isset($field['unsigned']) ? ' UNSIGNED' : '').
(isset($field['default']) ? ' DEFAULT '.$field['default'] : '').
(isset($field['notnull']) ? ' NOT NULL' : '')
);
}
// }}}
// {{{ getClobDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an character
* large object type field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the
* properties of the field being declared as array
* indexes. Currently, the types of supported field
* properties are as follows:
*
* length
* Integer value that determines the maximum length
* of the large object field. If this argument is
* missing the field should be declared to have the
* longest length allowed by the DBMS.
*
* notnull
* Boolean flag that indicates whether this field
* is constrained to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getClobDeclaration($name, $field)
{
if (isset($field['length'])) {
$length = $field['length'];
if ($length <= 255) {
$type = 'TINYTEXT';
} else {
if ($length <= 65535) {
$type = 'TEXT';
} else {
if ($length <= 16777215) {
$type = 'MEDIUMTEXT';
} else {
$type = 'LONGTEXT';
}
}
}
} else {
$type = 'LONGTEXT';
}
return("$name $type".
(isset($field['notnull']) ? ' NOT NULL' : ''));
}
// }}}
// {{{ getBlobDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an binary large
* object type field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes.
* Currently, the types of supported field
* properties are as follows:
*
* length
* Integer value that determines the maximum length
* of the large object field. If this argument is
* missing the field should be declared to have the
* longest length allowed by the DBMS.
*
* notnull
* Boolean flag that indicates whether this field is
* constrained to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getBlobDeclaration($name, $field)
{
if (isset($field['length'])) {
$length = $field['length'];
if ($length <= 255) {
$type = 'TINYBLOB';
} else {
if ($length <= 65535) {
$type = 'BLOB';
} else {
if ($length <= 16777215) {
$type = 'MEDIUMBLOB';
} else {
$type = 'LONGBLOB';
}
}
}
}
else {
$type = 'LONGBLOB';
}
return("$name $type".
(isset($field['notnull']) ? ' NOT NULL' : ''));
}
// }}}
// {{{ getDateDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an date type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes.
* Currently, the types of supported field properties
* are as follows:
*
* default
* Date value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is
* constrained to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getDateDeclaration($name, $field)
{
return("$name DATE".
(isset($field['default']) ? " DEFAULT '".$field['default']."'" : '').
(isset($field['notnull']) ? ' NOT NULL' : '')
);
}
// }}}
// {{{ getTimestampDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an timestamp
* type field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes.
* Currently, the types of supported field
* properties are as follows:
*
* default
* Time stamp value to be used as default for this
* field.
*
* notnull
* Boolean flag that indicates whether this field is
* constrained to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getTimestampDeclaration($name, $field)
{
return("$name DATETIME".
(isset($field['default']) ? " DEFAULT '".$field['default']."'" : '').
(isset($field['notnull']) ? ' NOT NULL' : '')
);
}
// }}}
// {{{ getTimeDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an time type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes.
* Currently, the types of supported field
* properties are as follows:
*
* default
* Time value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is
* constrained to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getTimeDeclaration($name, $field)
{
return("$name TIME".
(isset($field['default']) ? " DEFAULT '".$field['default']."'" : '').
(isset($field['notnull']) ? ' NOT NULL' : '')
);
}
// }}}
// {{{ getFloatDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an float type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes.
* Currently, the types of supported field
* properties are as follows:
*
* default
* Integer value to be used as default for this
* field.
*
* notnull
* Boolean flag that indicates whether this field is
* constrained to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getFloatDeclaration($name, $field)
{
if (isset($this->options['fixedfloat'])) {
$this->fixed_float = $this->options['fixedfloat'];
} else {
if ($this->connection == 0) {
// XXX needs more checking
$this->connect();
}
}
return("$name DOUBLE".
($this->fixed_float ?
'('.($this->fixed_float + 2).','.$this->fixed_float.')' : '').
(isset($field['default']) ?
' DEFAULT '.$this->getFloatValue($field['default']) : '').
(isset($field['notnull']) ? ' NOT NULL' : '')
);
}
// }}}
// {{{ getDecimalDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an decimal type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes.
* Currently, the types of supported field
* properties are as follows:
*
* default
* Integer value to be used as default for this
* field.
*
* notnull
* Boolean flag that indicates whether this field is
* constrained to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getDecimalDeclaration($name, $field)
{
return("$name BIGINT".
(isset($field['default']) ?
' DEFAULT '.$this->getDecimalValue($field['default']) : '').
(isset($field['notnull']) ? ' NOT NULL' : '')
);
}
// }}}
// {{{ getClobValue()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param resource $prepared_query query handle from prepare()
* @param $parameter
* @param $clob
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access public
*/
function getClobValue($prepared_query, $parameter, $clob)
{
$value = "'";
while(!$this->endOfLob($clob)) {
if (MDB::isError($result = $this->readLob($clob, $data, $this->options['lob_buffer_length']))) {
return($result);
}
$value .= $this->_quote($data);
}
$value .= "'";
return($value);
}
// }}}
// {{{ freeClobValue()
/**
* free a character large object
*
* @param resource $prepared_query query handle from prepare()
* @param string $clob
* @return MDB_OK
* @access public
*/
function freeClobValue($prepared_query, $clob)
{
unset($this->lobs[$clob]);
return(MDB_OK);
}
// }}}
// {{{ getBlobValue()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param resource $prepared_query query handle from prepare()
* @param $parameter
* @param $blob
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access public
*/
function getBlobValue($prepared_query, $parameter, $blob)
{
$value = "'";
while(!$this->endOfLob($blob)) {
if (MDB::isError($result = $this->readLob($blob, $data, $this->options['lob_buffer_length']))) {
return($result);
}
$value .= addslashes($data);
}
$value .= "'";
return($value);
}
// }}}
// {{{ freeBlobValue()
/**
* free a binary large object
*
* @param resource $prepared_query query handle from prepare()
* @param string $blob
* @return MDB_OK
* @access public
*/
function freeBlobValue($prepared_query, $blob)
{
unset($this->lobs[$blob]);
return(MDB_OK);
}
// }}}
// {{{ getFloatValue()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access public
*/
function getFloatValue($value)
{
return(($value === NULL) ? 'NULL' : (float)$value);
}
// }}}
// {{{ getDecimalValue()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access public
*/
function getDecimalValue($value)
{
return(($value === NULL) ? 'NULL' : strval(round(doubleval($value)*$this->decimal_factor)));
}
// }}}
// {{{ nextId()
/**
* returns the next free id of a sequence
*
* @param string $seq_name name of the sequence
* @param boolean $ondemand when true the seqence is
* automatic created, if it
* not exists
*
* @return mixed MDB_Error or id
* @access public
*/
function nextId($seq_name, $ondemand = TRUE)
{
$sequence_name = $this->getSequenceName($seq_name);
$this->expectError(MDB_ERROR_NOSUCHTABLE);
$result = $this->query("INSERT INTO $sequence_name ("
.$this->options['sequence_col_name'].") VALUES (NULL)");
$this->popExpect();
if ($ondemand && MDB::isError($result) &&
$result->getCode() == MDB_ERROR_NOSUCHTABLE)
{
// Since we are create the sequence on demand
// we know the first id = 1 so initialize the
// sequence at 2
$result = $this->createSequence($seq_name, 2);
if (MDB::isError($result)) {
return($this->raiseError(MDB_ERROR, NULL, NULL,
'Next ID: on demand sequence could not be created'));
} else {
// First ID of a newly created sequence is 1
return(1);
}
}
$value = intval(@mysql_insert_id($this->connection));
$res = $this->query("DELETE FROM $sequence_name WHERE "
.$this->options['sequence_col_name']." < $value");
if (MDB::isError($res)) {
$this->warnings[] = 'Next ID: could not delete previous sequence table values';
}
return($value);
}
// }}}
// {{{ currId()
/**
* returns the current id of a sequence
*
* @param string $seq_name name of the sequence
* @return mixed MDB_Error or id
* @access public
*/
function currId($seq_name)
{
$sequence_name = $this->getSequenceName($seq_name);
$result = $this->query("SELECT MAX(".$this->options['sequence_col_name'].") FROM $sequence_name", 'integer');
if (MDB::isError($result)) {
return($result);
}
return($this->fetchOne($result));
}
// }}}
// {{{ fetchInto()
/**
* Fetch a row and insert the data into an existing array.
*
* @param resource $result result identifier
* @param int $fetchmode how the array data should be indexed
* @param int $rownum the row number to fetch
* @return int data array on success, a MDB error on failure
* @access public
*/
function fetchInto($result, $fetchmode = MDB_FETCHMODE_DEFAULT, $rownum = NULL)
{
$result_value = intval($result);
if ($rownum == NULL) {
++$this->highest_fetched_row[$result_value];
} else {
if (!@mysql_data_seek($result, $rownum)) {
return(NULL);
}
$this->highest_fetched_row[$result_value] =
max($this->highest_fetched_row[$result_value], $rownum);
}
if ($fetchmode == MDB_FETCHMODE_DEFAULT) {
$fetchmode = $this->fetchmode;
}
if ($fetchmode & MDB_FETCHMODE_ASSOC) {
$row = @mysql_fetch_assoc($result);
if (is_array($row) && $this->options['optimize'] == 'portability') {
$row = array_change_key_case($row, CASE_LOWER);
}
} else {
$row = @mysql_fetch_row($result);
}
if (!$row) {
if($this->options['autofree']) {
$this->freeResult($result);
}
return(NULL);
}
if (isset($this->result_types[$result_value])) {
$row = $this->convertResultRow($result, $row);
}
return($row);
}
// }}}
// {{{ nextResult()
/**
* Move the internal mysql result pointer to the next available result
* Currently not supported
*
* @param a valid result resource
* @return true if a result is available otherwise return false
* @access public
*/
function nextResult($result)
{
return(FALSE);
}
// }}}
// {{{ tableInfo()
/**
* returns meta data about the result set
*
* @param resource $result result identifier
* @param mixed $mode depends on implementation
* @return array an nested array, or a MDB error
* @access public
*/
function tableInfo($result, $mode = NULL) {
$count = 0;
$id = 0;
$res = array();
/*
* depending on $mode, metadata returns the following values:
*
* - mode is false (default):
* $result[]:
* [0]['table'] table name
* [0]['name'] field name
* [0]['type'] field type
* [0]['len'] field length
* [0]['flags'] field flags
*
* - mode is MDB_TABLEINFO_ORDER
* $result[]:
* ['num_fields'] number of metadata records
* [0]['table'] table name
* [0]['name'] field name
* [0]['type'] field type
* [0]['len'] field length
* [0]['flags'] field flags
* ['order'][field name] index of field named "field name"
* The last one is used, if you have a field name, but no index.
* Test: if (isset($result['meta']['myfield'])) { ...
*
* - mode is MDB_TABLEINFO_ORDERTABLE
* the same as above. but additionally
* ['ordertable'][table name][field name] index of field
* named 'field name'
*
* this is, because if you have fields from different
* tables with the same field name * they override each
* other with MDB_TABLEINFO_ORDER
*
* you can combine MDB_TABLEINFO_ORDER and
* MDB_TABLEINFO_ORDERTABLE with MDB_TABLEINFO_ORDER |
* MDB_TABLEINFO_ORDERTABLE * or with MDB_TABLEINFO_FULL
*/
// if $result is a string, then we want information about a
// table without a resultset
if (is_string($result)) {
if (MDB::isError($connect = $this->connect())) {
return $connect;
}
$id = @mysql_list_fields($this->database_name,
$result, $this->connection);
if (empty($id)) {
return($this->mysqlRaiseError());
}
} else { // else we want information about a resultset
$id = $result;
if (empty($id)) {
return($this->mysqlRaiseError());
}
}
$count = @mysql_num_fields($id);
// made this IF due to performance (one if is faster than $count if's)
if (empty($mode)) {
for ($i = 0, $j = 0; $i<$count; $i++) {
$name = @mysql_field_name($id, $i);
if ($name != 'dummy_primary_key') {
$res[$j]['table'] = @mysql_field_table($id, $i);
$res[$j]['name'] = $name;
$res[$j]['type'] = @mysql_field_type($id, $i);
$res[$j]['len'] = @mysql_field_len($id, $i);
$res[$j]['flags'] = @mysql_field_flags($id, $i);
$j++;
}
}
} else { // full
$res['num_fields'] = $count;
for ($i = 0; $i<$count; $i++) {
$name = @mysql_field_name($id, $i);
if ($name != 'dummy_primary_key') {
$res[$j]['table'] = @mysql_field_table($id, $i);
$res[$j]['name'] = $name;
$res[$j]['type'] = @mysql_field_type($id, $i);
$res[$j]['len'] = @mysql_field_len($id, $i);
$res[$j]['flags'] = @mysql_field_flags($id, $i);
if ($mode & MDB_TABLEINFO_ORDER) {
// note sure if this should be $i or $j
$res['order'][$res[$j]['name']] = $i;
}
if ($mode & MDB_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$j]['table']][$res[$j]['name']] = $j;
}
$j++;
}
}
}
// free the result only if we were called on a table
if (is_string($result)) {
@mysql_free_result($id);
}
return($res);
}
}
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