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owa_db.php
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owa_db.php
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<?php
//
// Open Web Analytics - An Open Source Web Analytics Framework
//
// Copyright 2006 Peter Adams. All rights reserved.
//
// Licensed under GPL v2.0 http://www.gnu.org/copyleft/gpl.html
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// $Id$
//
require_once(OWA_BASE_DIR.'/owa_base.php');
/**
* Database Connection Class
*
* @author Peter Adams <peter@openwebanalytics.com>
* @copyright Copyright © 2006 Peter Adams <peter@openwebanalytics.com>
* @license http://www.gnu.org/copyleft/gpl.html GPL v2.0
* @category owa
* @package owa
* @version $Revision$
* @since owa 1.0.0
*/
class owa_db extends owa_base {
/**
* Database Connection
*
* @var object
*/
var $connection;
var $connectionParams;
/**
* Number of queries
*
* @var integer
*/
var $num_queries;
/**
* Raw result object
*
* @var object
*/
var $new_result;
/**
* Rows
*
* @var array
*/
var $result;
/**
* Caller Params
*
* @var array
*/
var $params = array();
/**
* Status of selecting a databse
*
* @var boolean
*/
var $database_selection;
/**
* Status of connection
*
* @var boolean
*/
var $connection_status;
/**
* Number of rows in result set
*
* @var integer
*/
var $num_rows;
/**
* Number of rows affected by insert/update/delete statements
*
* @var integer
*/
var $rows_affected;
/**
* Microtime Start of Query
*
* @var unknown_type
*/
var $_start_time;
/**
* Total Elapsed time of query
*
* @var unknown_type
*/
var $_total_time;
/**
* Storage Array for components of sql queries
*
* @var array
*/
var $_sqlParams = array();
/**
* Sql Statement
*
* @var string
*/
var $_sql_statement;
/**
* Last Sql Statement
*
* @var string
*/
var $_last_sql_statement;
var $limit_for_row;
function __construct($db_host, $db_name, $db_user, $db_password, $open_new_connection = true, $persistant = false) {
$this->connectionParams = array('host' => $db_host,
'user' => $db_user,
'password' => $db_password,
'name' => $db_name,
'open_new_connection' => $open_new_connection,
'persistant' => $persistant);
return parent::__construct();
}
function __destruct() {
if ( $this->isConnectionEstablished() ) {
$this->close();
}
}
function connect() {
return false;
}
function pconnect() {
return false;
}
function close() {
return false;
}
function isConnectionEstablished() {
return $this->connection_status;
}
function getConnectionParam($name) {
if (array_key_exists($name, $this->connectionParams)) {
return $this->connectionParams[$name];
}
}
/**
* Prepare string
*
* @param string $string
* @return string
*/
function prepare_string($string) {
$chars = array("\t", "\n");
return str_replace($chars, " ", $string);
}
/**
* Starts the query microtimer
*
*/
function _timerStart() {
$mtime = microtime();
//$mtime = explode(' ', $mtime);
//$this->_start_time = $mtime[1].substr(round($mtime[0], 4), 1);
$this->_start_time = microtime();
return;
}
/**
* Ends the query microtimer and populates $this->_total_time
*
*/
function _timerEnd() {
$mtime = microtime();
//$mtime = explode(" ", $mtime);
//$endtime = $mtime[1].substr(round($mtime[0], 4), 1);
$endtime = microtime();
//$this->_total_time = bcsub($endtime, $this->_start_time, 4);
$this->_total_time = number_format(((substr($endtime,0,9)) + (substr($endtime,-10)) - (substr($this->_start_time,0,9)) - (substr($this->_start_time,-10))),6);
return;
}
function selectColumn($name, $as = '') {
if (is_array($name)) {
$as = $name[1];
$name = $name[0];
}
$this->_sqlParams['select_values'][] = array('name' => $name, 'as' => $as);
return;
}
function select($name, $as = '') {
return $this->selectColumn($name, $as = '');
}
function where($name, $value, $operator = '=') {
if ( ! owa_lib::isEmpty( $value ) ) {
// hack for intentional empty value
if($value == ' '){
$value = '';
}
$this->_sqlParams['where'][$name] = array('name' => $name, 'value' => $value, 'operator' => $operator);
}
}
function having($name, $value, $operator = '=') {
if ( ! owa_lib::isEmpty( $value ) ) {
// hack for intentional empty value
if($value == ' ') {
$value = '';
}
$this->_sqlParams['having'][$name] = array('name' => $name, 'value' => $value, 'operator' => $operator);
}
}
function multiWhere($where_array = array()) {
if (!empty($where_array)):
foreach ($where_array as $k => $v) {
if ( ! owa_lib::isEmpty($v) ):
if (empty($v['operator'])):
$v['operator'] = '=';
endif;
$this->_sqlParams['where'][$k] = array('name' => $k, 'value' => $v['value'], 'operator' => $v['operator']);
endif;
}
endif;
}
function groupBy($col) {
$this->_sqlParams['groupby'][] = $col;
return;
}
function orderBy($col, $flag = '') {
$this->_sqlParams['orderby'][] = array($col, $flag);
return;
}
function order($flag) {
$this->_sqlParams['order'] = $flag;
return;
}
function limit($value) {
$this->_sqlParams['limit'] = $value;
return;
}
function offset($value) {
$this->_sqlParams['offset'] = $value;
return;
}
function set($name, $value) {
$this->_sqlParams['set_values'][] = array('name' => $name, 'value' => $value);
return;
}
function executeQuery() {
switch($this->_sqlParams['query_type']) {
case 'insert':
return $this->_insertQuery();
case 'select':
return $this->_selectQuery();
case 'update':
return $this->_updateQuery();
case 'delete':
return $this->_deleteQuery();
default:
return $this->_query();
}
}
function getAllRows() {
return $this->_selectQuery();
}
function getOneRow() {
$this->limit(1);
$ret = $this->_selectQuery();
return $ret[0];
}
function _setSql($sql) {
$this->_sql_statement = $sql;
}
function selectFrom($name, $as = '') {
if (is_array($name)) {
$as = $name[1];
$name = $name[0];
}
$this->_sqlParams['query_type'] = 'select';
$this->_sqlParams['from'][$name] = array('name' => $name, 'as' => $as);
}
function from( $name, $as = '' ) {
return $this->selectFrom( $name, $as );
}
function insertInto($table) {
$this->_sqlParams['query_type'] = 'insert';
$this->_sqlParams['table'] = $table;
}
function deleteFrom($table) {
$this->_sqlParams['query_type'] = 'delete';
$this->_sqlParams['table'] = $table;
}
function updateTable($table) {
$this->_sqlParams['query_type'] = 'update';
$this->_sqlParams['table'] = $table;
}
function _insertQuery() {
owa_coreAPI::profile($this, __FUNCTION__, __LINE__);
$params = $this->_fetchSqlParams('set_values');
$count = count($params);
$i = 0;
$sql_cols = '';
$sql_values = '';
foreach ($params as $k => $v) {
$sql_cols .= $v['name'];
$sql_values .= "'".$this->prepare($v['value'])."'";
$i++;
// Add commas
if ($i < $count):
$sql_cols .= ", ";
$sql_values .= ", ";
endif;
}
owa_coreAPI::profile($this, __FUNCTION__, __LINE__);
$this->_setSql(sprintf(OWA_SQL_INSERT_ROW, $this->_sqlParams['table'], $sql_cols, $sql_values));
owa_coreAPI::profile($this, __FUNCTION__, __LINE__);
$ret = $this->_query();
owa_coreAPI::profile($this, __FUNCTION__, __LINE__);
return $ret;
}
function generateSelectQuerySql() {
$cols = '';
$i = 0;
$params = $this->_fetchSqlParams('select_values');
$top_string = '';
$limit_param = $this->_fetchSqlParams('limit');
$offset_param = $this->_fetchSqlParams('offset');
if(!empty($limit_param)) {
if($limit_param == 0)
$limit_param = 1;
if($offset_param == '' || $offset_param == 0)
$offset_param = 1; //sometimes only LIMIT is set in the calling program
$top_string = "TOP ".$limit_param*$offset_param." "; //only select the TOP rows for the given pages
//further slicing is done in function paginated_Result set below
} //not empty limit_param
$count = count($params);
foreach ($params as $k => $v) {
$cols .= $v['name'];
// Add as
if (!empty($v['as'])):
$cols .= ' as '.$v['as'];
endif;
// Add commas
if ($i < $count - 1):
$cols .= ', ';
endif;
$i++;
}
$cols = $top_string.$cols;
$sql = sprintf("SELECT %s FROM %s %s %s %s %s %s",
$cols,
$this->_makeFromClause(),
$this->_makeWhereClause(),
$this->_makeGroupByClause(),
$this->_makeHavingClause(),
$this->_makeOrderByClause(),
$this->_makeLimitClause()
);
//echo $sql."<br/>";
$this->_setSql($sql);
return $sql;
}
function _selectQuery() {
$this->generateSelectQuerySql();
return $this->_query();
}
function _updateQuery() {
$params = $this->_fetchSqlParams('set_values');
$count = count($params);
$i = 0;
$sql_cols = '';
$sql_values = '';
$set = '';
foreach ($params as $k => $v) {
//$sql_cols = $sql_cols.$key;
//$sql_values = $sql_values."'".$this->prepare($value)."'";
// Add commas
if ($i != 0):
$set .= ', ';
endif;
$set .= $v['name'] .' = \'' . $this->prepare($v['value']) . '\'';
$i++;
}
$this->_setSql(sprintf(OWA_SQL_UPDATE_ROW, $this->_sqlParams['table'], $set, $this->_makeWhereClause()));
return $this->_query();
}
function _deleteQuery() {
$this->_setSql(sprintf(OWA_SQL_DELETE_ROW, $this->_sqlParams['table'], $this->_makeWhereClause()));
return $this->_query();
}
function rawQuery($sql) {
$this->_setSql($sql);
return $this->_query();
}
function _fetchSqlParams($sql_params_name) {
if (array_key_exists($sql_params_name, $this->_sqlParams)):
if (!empty($this->_sqlParams[$sql_params_name])):
return $this->_sqlParams[$sql_params_name];
else:
return false;
endif;
else:
return false;
endif;
}
function _makeWhereClause() {
$params = $this->_fetchSqlParams('where');
if ( ! empty( $params ) ) {
return $this->_makeConstraintClause('WHERE', $params);
}
}
function _makeHavingClause() {
$params = $this->_fetchSqlParams('having');
if ( ! empty( $params ) ) {
return $this->_makeConstraintClause('HAVING', $params);
}
}
function _makeConstraintClause($type = 'WHERE', $params) {
if ( ! empty( $params ) ) {
$count = count( $params );
$i = 0;
$constraint = $type.' ';
foreach ($params as $k => $v) {
//print_r($v);
switch (strtolower($v['operator'])) {
case '==':
$constraint .= sprintf("%s = '%s'",$v['name'], $v['value']);
break;
case 'between':
$constraint .= sprintf("%s BETWEEN '%s' AND '%s'", $v['name'], $v['value']['start'], $v['value']['end']);
break;
case '=~':
$constraint .= sprintf("%s %s '%s'",$v['name'], OWA_SQL_REGEXP, $v['value']);
break;
case '!~':
$constraint .= sprintf("%s %s '%s'",$v['name'], OWA_SQL_NOTREGEXP, $v['value']);
break;
case '=@':
$constraint .= sprintf("LOCATE('%s', %s) > 0",$v['value'], $v['name']);
break;
case '!@':
$constraint .= sprintf("LOCATE('%s', %s) = 0",$v['value'], $v['name']);
break;
default:
$constraint .= sprintf("%s %s '%s'",$v['name'], $v['operator'], $v['value']);
break;
}
if ($i < $count - 1) {
$constraint .= " AND ";
}
$i++;
}
return $constraint;
}
}
function join($type, $table, $as, $foreign_key, $primary_key = '') {
if (!$primary_key) {
if (!$as) {
$as = $table;
}
$primary_key = $as.'.id';
}
$this->_sqlParams['joins'][$as] = array('type' => $type,
'table' => $table,
'as' => $as,
'foreign_key' => $foreign_key,
'primary_key' => $primary_key);
}
function _makeJoinClause() {
$params = $this->_fetchSqlParams('joins');
if (!empty($params)):
$join_clause = '';
foreach ($params as $k => $v) {
if (!empty($v['as'])):
$join_clause .= sprintf(" %s %s AS %s ON %s = %s", $v['type'],
$v['table'],
$v['as'],
$v['foreign_key'],
$v['primary_key']);
else:
$join_clause .= sprintf(" %s %s ON %s = %s", $v['type'],
$v['table'], $v['foreign_key'],
$v['primary_key']);
endif;
}
return $join_clause;
else:
return;
endif;
}
function _makeFromClause() {
$from = '';
$i = 0;
$params = $this->_fetchSqlParams('from');
if(!empty($params)):
$count = count($params);
foreach ($params as $k => $v) {
$from .= $v['name'];
// Add as
if (!empty($v['as'])):
$from .= ' as '.$v['as'];
endif;
// Add commas
if ($i < $count - 1):
$from .= ', ';
endif;
$i++;
}
$from .= $this->_makeJoinClause();
return $from;
else:
$this->e->debug("No SQL FROM params set.");
return false;
endif;
}
function _makeGroupByClause() {
$params = $this->_fetchSqlParams('groupby');
if (!empty($params)):
return sprintf("GROUP BY %s", $this->_makeDelimitedValueList($params));
else:
return;
endif;
}
function _makeOrderByClause() {
$sorts = $this->_fetchSqlParams('orderby');
//print_r($sorts);
if (!empty($sorts)):
$order = $this->_fetchSqlParams('order');
$i = 1;
$sort_string = '';
$count = count($sorts);
foreach ($sorts as $sort) {
// needed for backwards compatability.
if (!isset($sort[1])) {
$sort[1] = $order;
}
$sort_string .= sprintf("%s %s",$sort[0], $sort[1]);
if ($i < $count) {
$sort_string .= ', ';
}
$i++;
}
return sprintf("ORDER BY %s", $sort_string);
else:
return;
endif;
}
function _makeLimitClause() {
$ret = '';
return $ret; //handled as TOP and slice LIMIT is not there in sqlserver yet
$param = $this->_fetchSqlParams('limit');
if(!empty($param)):
$limit = sprintf("LIMIT %d", $param);
$offset = $this->_makeOffsetClause();
$ret = $limit . ' ' . $offset;
return $ret;
else:
return;
endif;
}
function _makeOffsetClause() {
$param = $this->_fetchSqlParams('offset');
if(!empty($param)):
return sprintf("OFFSET %d", $param);
else:
return;
endif;
}
/**
* Creates a delimited value list from an array or arrays.
*
*/
function _makeDelimitedValueListArray($values, $delimiter = ', ', $inner_delimiter = ' ') {
$items = '';
$i = 0;
$count = count($values);
//print_r($values);
foreach ($values as $k) {
$items .= implode($inner_delimiter, $k);
// Add commas
if ($i < $count - 1):
$items .= $delimiter;
endif;
$i++;
}
return $items;
}
function _makeDelimitedValueList($values, $delimiter = ', ') {
$items = '';
$i = 0;
$count = count($values);
if (is_array($values)):
foreach ($values as $k) {
$items .= $k;
// Add commas
if ($i < $count - 1):
$items .= $delimiter;
endif;
$i++;
}
else:
$items = $values;
endif;
return $items;
}
function _query() {
switch($this->_sqlParams['query_type']) {
case 'insert':
$ret = $this->query($this->_sql_statement);
break;
case 'select':
$ret = $this->get_results($this->_sql_statement);
if (array_key_exists('result_format', $this->_sqlParams)):
$ret = $this->_formatResults($ret);
endif;
$ret = $this->get_paginated_results($ret);
break;
case 'update':
$ret = $this->query($this->_sql_statement);
break;
case 'delete':
$ret = $this->query($this->_sql_statement);
break;
}
$this->_last_sql_statement = $this->_sql_statement;
$this->_sql_statement = '';
$this->_sqlParams = array();
return $ret;
}
function removeNs($string, $ns = '') {
if (empty($ns)):
$ns = $this->config['ns'];
endif;
$ns_len = strlen($ns);
return substr($string, $ns_len);
}
function setFormat($value) {
$this->_sqlParams['result_format'] = $value;
return;
}
function _formatResults($results) {
switch ($this->_sqlParams['result_format']) {
case "single_array":
return $results[0];
break;
case "single_row":
return $results[0];
break;
case "inverted_array":
return owa_lib::deconstruct_assoc($results);
break;
default:
return $results;
break;
}
}
/**
* Drops a table
*
*/
function dropTable($table_name) {
return $this->query(sprintf(OWA_SQL_DROP_TABLE, $table_name));
}
/**
* Change table type
*
*/
function alterTableType($table_name, $engine) {
return $this->query(sprintf(OWA_SQL_ALTER_TABLE_TYPE, $table_name, $engine));
}
/**
* Rename a table
*
*/
function renameTable($table_name, $new_table_name) {
return $this->query(sprintf(OWA_SQL_RENAME_TABLE, $table_name, $new_table_name));
}
/**
* Renames column
* idempotent
*/
function renameColumn($table_name, $old, $new, $defs) {
return $this->query(sprintf(OWA_SQL_RENAME_COLUMN, $table_name, $old, $new, $defs));
}
/**
* Adds new column to table
* idempotent
*/
function addColumn($table_name, $column_name, $column_definition) {