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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, Frank M. Kromann |
// | 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: Frank M. Kromann <frank@kromann.info> |
// +----------------------------------------------------------------------+
//
// $Id: mssql.php,v 1.6.4.30 2004/04/10 07:57:16 lsmith Exp $
//
require_once('MDB/Common.php');
/**
* MDB MSSQL Server driver
*
* Notes:
* - Until at least version 6.5, the only kind of table changes that the
* ALTER TABLE SQL statement of Microsoft SQL server supports is new field
and constraint additions.
*
* - The driver alterTable method does not implement table or column renaming,
* column definitions changes or column dropping. In the future versions of
* this driver those capabilities may be emulated using other SQL statements
* to recreate the tables with a new definition.
*
* MDB_Manager_mssql::getTableFieldDefinition() is still alpha quality
*
* @package MDB
* @category Database
* @author Frank M. Kromann <frank@kromann.info>
*/
class MDB_mssql 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 $highest_fetched_row = array();
var $columns = array();
// }}}
// {{{ constructor
/**
* Constructor
*/
function MDB_mssql()
{
$this->MDB_Common();
$this->phptype = 'mssql';
$this->dbsyntax = 'mssql';
$this->supported['Sequences'] = 1;
$this->supported['Indexes'] = 1;
$this->supported['AffectedRows'] = 1;
$this->supported['Transactions'] = 1;
$this->supported['Summaryfunctions'] = 1;
$this->supported['OrderByText'] = 0;
$this->supported['CurrId'] = 0;
$this->supported['SelectRowRanges'] = 1;
$this->supported['LOBs'] = 1;
$this->supported['Replace'] = 1;
$this->supported['SubSelects'] = 1;
$this->errorcode_map = array(
207 => MDB_ERROR_NOSUCHFIELD,
208 => MDB_ERROR_NOSUCHTABLE,
245 => MDB_ERROR_INVALID_NUMBER,
515 => MDB_ERROR_CONSTRAINT_NOT_NULL,
547 => MDB_ERROR_CONSTRAINT,
1205 => MDB_ERROR_DEADLOCK,
2627 => MDB_ERROR_CONSTRAINT,
2714 => MDB_ERROR_ALREADY_EXISTS,
3701 => MDB_ERROR_NOSUCHTABLE,
8134 => MDB_ERROR_DIVZERO,
);
}
// }}}
// {{{ errorNative()
/**
* Get the native error code of the last error (if any) that
* occured on the current connection.
*
* @access public
*
* @return int native FrontBase error code
*/
function errorNative()
{
$res = @mssql_query('select @@ERROR as ErrorCode', $this->connection);
if ($res) {
$row = @mssql_fetch_row($res);
if (is_array($row) && $row[0] > 0) {
return $row[0];
}
}
return NULL;
}
// }}}
// {{{ mssqlRaiseError()
/**
* 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 string $message userinfo message
* @param integer $errno error code
* @return object a PEAR error object
* @access public
* @see PEAR_Error
*/
function mssqlRaiseError($errno = NULL, $message = NULL)
{
if ($errno == NULL) {
$errno = $this->errorNative();
}
$error = @mssql_get_last_message();
return $this->raiseError($this->errorCode(), NULL, NULL,
$message, $error);
}
// }}}
// {{{ quoteIdentifier()
/**
* Quote a string so it can be safely used as a table / column name
*
* Quoting style depends on which database driver is being used.
*
* @param string $str identifier name to be quoted
*
* @return string quoted identifier string
*
* @since 1.6.0
* @access public
*/
function quoteIdentifier($str)
{
return '[' . str_replace(']', ']]', $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 TRANSACTION');
} else {
$result = $this->query('BEGIN TRANSACTION');
}
if (MDB::isError($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'));
}
$result = $this->query('COMMIT TRANSACTION');
if (MDB::isError($result)) {
return($result);
}
return($this->query('BEGIN TRANSACTION'));
}
// }}}
// {{{ 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'));
}
$result = $this->query('ROLLBACK TRANSACTION');
if (MDB::isError($result)) {
return($result);
}
return($this->query('BEGIN TRANSACTION'));
}
function _doQuery($query)
{
$this->current_row = $this->affected_rows = -1;
return(@mssql_query($query, $this->connection));
}
// }}}
// {{{ 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 == $this->options['persistent'])
{
return(MDB_OK);
}
@mssql_close($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));
}
$function = ($this->options['persistent'] ? 'mssql_pconnect' : 'mssql_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->supported['Transactions']) && !$this->auto_commit
&& !$this->_doQuery("BEGIN TRANSACTION"))
{
@mssql_close($this->connection);
$this->connection = 0;
$this->affected_rows = -1;
return($this->raiseError("Connect: Could not begin the initial transaction"));
}
$this->connected_host = $this->host;
$this->connected_user = $this->user;
$this->connected_password = $this->password;
$this->connected_port = $port;
$this->selected_database = $this->database_name;
$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 = $this->_doQuery("ROLLBACK TRANSACTION");
}
@mssql_close($this->connection);
$this->connection = 0;
$this->affected_rows = $this->current_row = -1;
if (isset($result) && MDB::isError($result)) {
return($result);
}
unset($GLOBALS['_MDB_databases'][$this->database]);
return(TRUE);
}
return(FALSE);
}
function standaloneQuery($query)
{
if(!PEAR::loadExtension($this->phptype)) {
return(PEAR::raiseError(NULL, MDB_ERROR_NOT_FOUND,
NULL, NULL, 'extension '.$this->phptype.' is not compiled into PHP',
'MDB_Error', TRUE));
}
$connection = @mssql_connect($this->host,$this->user,$this->password);
if($connection == 0) {
return($this->mssqlRaiseError(NULL, "Query: Could not connect to the Microsoft SQL server"));
}
$result = @mssql_query($query, $connection);
if(!$result) {
return($this->mssqlRaiseError(NULL, "Query: Could not query a Microsoft SQL server"));
}
@mssql_close($connection);
return(MDB_OK);
}
// }}}
// {{{ 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: $query");
if ($this->database_name) {
$ismanip = MDB::isManip($query);
$this->last_query = $query;
$first = $this->first_selected_row;
$limit = $this->selected_row_limit;
$this->first_selected_row = $this->selected_row_limit = 0;
$last_connection = $this->connection;
$result = $this->connect();
if (MDB::isError($result)) {
return($result);
}
if($limit > 0) {
$fetch = $first + $limit;
if (!$ismanip) {
$query = str_replace('SELECT', "SELECT TOP $fetch", $query);
}
}
if( $last_connection != $this->connection
|| !strcmp($this->selected_database, '')
|| strcmp($this->selected_database, $this->database_name))
{
if(!@mssql_select_db($this->database_name, $this->connection)) {
return($this->mssqlRaiseError());
}
}
if ($result = $this->_doQuery($query)) {
if ($ismanip) {
$this->affected_rows = @mssql_rows_affected($this->connection);
return(MDB_OK);
} else {
$result_value = intval($result);
if($first > 0 || $limit > 0) {
$this->limits[$result_value] = array($first, $limit);
}
$this->highest_fetched_row[$result_value] = -1;
if ($types != NULL) {
if (!is_array($types)) {
$types = array($types);
}
$err = $this->setResultTypes($result, $types);
if (MDB::isError($err)) {
$this->freeResult($result);
return($err);
}
}
return($result);
}
}
}
return($this->mssqlRaiseError());
}
// }}}
// {{{ 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();
$columns = @mssql_num_fields($result);
for($column = 0; $column < $columns; $column++) {
$field_name = @mssql_field_name($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)
{
if (!isset($this->highest_fetched_row[intval($result)])) {
return($this->raiseError(MDB_ERROR_INVALID, NULL, NULL,
'numCols: it was specified an inexisting result set'));
}
return(@mssql_num_fields($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], $row);
if (isset($this->limits[$result_value])) {
$row += $this->limits[$result_value][0];
}
$res = @mssql_result($result, $row, $field);
if ($res === FALSE && $res != NULL) {
return($this->mssqlRaiseError());
}
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_BOOLEAN:
return ($value == '1') ? TRUE : FALSE;
case MDB_TYPE_DATE:
if(strlen($value) > 10) {
$value=substr($value,0,10);
}
return($value);
case MDB_TYPE_TIME:
if(strlen($value) > 8) {
$value=substr($value,11,8);
}
return($value);
case MDB_TYPE_TIMESTAMP:
return($value);
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)
{
$result_value = intval($result);
$rows = @mssql_num_rows($result);
if (isset($this->limits[$result_value])) {
$rows -= $this->limits[$result_value][0];
if ($rows < 0) $rows = 0;
}
return($rows);
}
// }}}
// {{{ 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($this->fetched_row[$result_value])) {
unset($this->fetched_row[$result_value]);
}
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(@mssql_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, $field)
{
if (isset($field['unsigned'])) {
$this->warnings[] = "unsigned integer field \"$name\" is being
declared as signed integer";
}
return("$name INT".(isset($field["default"]) ? " DEFAULT ".$field["default"] : "").(isset($field["notnull"]) ? " NOT NULL" : " NULL"));
}
// }}}
// {{{ getTextDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an text type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* length
* Integer value that determines the maximum length of the text
* field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
*
* default
* Text value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getTextDeclaration($name, $field)
{
return((isset($field["length"]) ? "$name VARCHAR (".$field["length"].")" : "$name TEXT").(isset($field["default"]) ? " DEFAULT ".$this->GetTextValue($field["default"]) : "").(isset($field["notnull"]) ? " NOT NULL" : " 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 <= 8000) {
$type = "VARCHAR($length)";
} else {
$type = "TEXT";
}
} else {
$type = "TEXT";
}
return("$name $type".(isset($field["notnull"]) ? " NOT NULL" : " 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 <= 8000) {
$type = "VARBINARY($length)";
} else {
$type = "IMAGE";
}
} else {
$type = "IMAGE";
}
return("$name $type".(isset($field["notnull"]) ? " NOT NULL" : " NULL"));
}
// }}}
// {{{ getBooleanDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare a boolean type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* default
* Boolean value to be used as default for this field.
*
* notnullL
* Boolean flag that indicates whether this field is constrained
* to not be set to NULL.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getBooleanDeclaration($name, $field)
{
return("$name BIT".(isset($field["default"]) ? " DEFAULT ".$field["default"] : "").(isset($field["notnull"]) ? " NOT NULL" : " 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 CHAR (".strlen("YYYY-MM-DD").")".(isset($field["default"]) ? " DEFAULT ".$this->getDateValue($field["default"]) : "").(isset($field["notnull"]) ? " NOT NULL" : " 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 CHAR (".strlen("YYYY-MM-DD HH:MM:SS").")".(isset($field["default"]) ? " DEFAULT ".$this->getTimestampValue($field["default"]) : "").(isset($field["notnull"]) ? " NOT NULL" : " 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 CHAR (".strlen("HH:MM:SS").")".(isset($field["default"]) ? " DEFAULT ".$this->getTimeValue($field["default"]) : "").(isset($field["notnull"]) ? " NOT NULL" : " 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, $field)
{
return("$name FLOAT".(isset($field["default"]) ? " DEFAULT ".$field["default"] : "").(isset($field["notnull"]) ? " NOT NULL" : " 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 DECIMAL(18,".$this->decimal_places.")".(isset($field["default"]) ? " DEFAULT ".$this->getDecimalValue($field["default"]) : "").(isset($field["notnull"]) ? " NOT NULL" : " 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)
{
$value = "0x";
while(!$this->endOfLob($blob))
{
if (MDB::isError($result = $this->readLob($blob, $data, $this->options['lob_buffer_length']))) {
return($result);
}
$value.= Bin2Hex($data);
}
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);
}
// }}}
// {{{ getBooleanValue()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access public
*/
function getBooleanValue($value)
{
return(($value === NULL) ? 'NULL' : $value);
}
// }}}
// {{{ 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' : $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' : $value);
}
// }}}
// {{{ 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 DEFAULT VALUES");
$this->popExpect();
if ($ondemand && MDB::isError($result) &&
$result->getCode() == MDB_ERROR_NOSUCHTABLE)
{
// Since we are creating 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 = $this->queryOne("SELECT @@IDENTITY FROM $sequence_name", 'integer');
if (MDB::isError($value)) {
return($value);
}
$result = $this->query("DELETE FROM $sequence_name WHERE ".$this->options['sequence_col_name']." < $value");
if (MDB::isError($result)) {
$this->warnings[] = 'nextID: could not delete previous sequence table values';
}
return($value);
}
// }}}
// {{{ 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 (is_null($rownum)) {
++$this->highest_fetched_row[$result_value];
} else {
$this->highest_fetched_row[$result_value] =
max($this->highest_fetched_row[$result_value], $rownum);
if (isset($this->limits[$result_value])) {
$rownum = $rownum + $this->limits[$result_value][0];
}
if (!@mssql_data_seek($result, $rownum)) {
return(NULL);
}
}
if ($fetchmode == MDB_FETCHMODE_DEFAULT) {
$fetchmode = $this->fetchmode;
}
if ($fetchmode & MDB_FETCHMODE_ASSOC) {
$row = @mssql_fetch_assoc($result);
if (is_array($row) && $this->options['optimize'] == 'portability') {
$row = array_change_key_case($row, CASE_LOWER);
}
} else {
$row = @mssql_fetch_row($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);
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table or a result set
*
* NOTE: doesn't support table name and flags if called from a db_result
*
* @param mixed $resource SQL Server result identifier or table name
* @param int $mode A valid tableInfo mode (MDB_TABLEINFO_ORDERTABLE or
* MDB_TABLEINFO_ORDER)
*
* @return array An array with all the information
*/
function tableInfo($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 (!@mssql_select_db($this->database_name, $this->connection)) {
return $this->mssqlRaiseError();
}
$id = @mssql_query("SELECT * FROM $result", $this->connection);
if (empty($id)) {
return($this->mssqlRaiseError());
}
} else { // else we want information about a resultset
$id = $result;
if (empty($id)) {
return($this->mssqlRaiseError());
}
}
$count = @mssql_num_fields($id);
// made this IF due to performance (one if is faster than $count if's)
if (empty($mode)) {
for ($i=0; $i<$count; $i++) {
$res[$i]['table'] = (is_string($result)) ? $result : '';
$res[$i]['name'] = @mssql_field_name($id, $i);
$res[$i]['type'] = @mssql_field_type($id, $i);
$res[$i]['len'] = @mssql_field_length($id, $i);
// We only support flags for tables
$res[$i]['flags'] = is_string($result) ? $this->_mssql_field_flags($result, $res[$i]['name']) : '';
}
} else { // full
$res['num_fields']= $count;
for ($i=0; $i<$count; $i++) {
$res[$i]['table'] = (is_string($result)) ? $result : '';
$res[$i]['name'] = @mssql_field_name($id, $i);
$res[$i]['type'] = @mssql_field_type($id, $i);
$res[$i]['len'] = @mssql_field_length($id, $i);
// We only support flags for tables
$res[$i]['flags'] = is_string($result) ? $this->_mssql_field_flags($result, $res[$i]['name']) : '';
if ($mode & MDB_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & MDB_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
}
}
// free the result only if we were called on a table
if (is_string($result)) {
@mssql_free_result($id);
}
return($res);
}
// }}}
// {{{ _mssql_field_flags()
/**
* Get the flags for a field, currently only supports "isnullable" and "primary_key"
*
* @param string The table name
* @param string The field
* @access private
*/
function _mssql_field_flags($table, $column)
{
static $current_table = NULL;
static $flags;
// At the first call we discover the flags for all fields
if ($table != $current_table) {
$flags = array();
// find nullable fields
$q_nulls = "SELECT syscolumns.name, syscolumns.isnullable
FROM sysobjects
INNER JOIN syscolumns ON sysobjects.id = syscolumns.id
WHERE sysobjects.name ='$table' AND syscolumns.isnullable = 1";
$res = $this->query($q_nulls, NULL, FALSE);
$res = $this->fetchAll($res, MDB_FETCHMODE_ASSOC);
foreach ($res as $data) {
if ($data['isnullable'] == 1) {
$flags[$data['name']][] = 'isnullable';
}
}
// find primary keys
$res2 = $this->query("EXEC SP_PKEYS[$table]", NULL, FALSE);
$res2 = $this->fetchAll($res, MDB_FETCHMODE_ASSOC);
foreach ($res2 as $data) {
if (!empty($data['COLUMN_NAME'])) {
$flags[$data['COLUMN_NAME']][] = 'primary_key';
}
}
$current_table = $table;
}
if (isset($flags[$column])) {
return(implode(',', $flags[$column]));
}
return('');
}
// }}}
}
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