/include/dblayer/pgsql.php
PHP | 521 lines | 358 code | 140 blank | 23 comment | 62 complexity | e62ddbf01e2a6e9a675525bed46ea7eb MD5 | raw file
Possible License(s): GPL-2.0
- <?php
- /**
- * Copyright (C) 2008-2010 FluxBB
- * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB
- * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher
- */
- // Make sure we have built in support for PostgreSQL
- if (!function_exists('pg_connect'))
- exit('This PHP environment doesn\'t have PostgreSQL support built in. PostgreSQL support is required if you want to use a PostgreSQL database to run this forum. Consult the PHP documentation for further assistance.');
- class DBLayer
- {
- var $prefix;
- var $link_id;
- var $query_result;
- var $last_query_text = array();
- var $in_transaction = 0;
- var $saved_queries = array();
- var $num_queries = 0;
- var $error_no = false;
- var $error_msg = 'Unknown';
- var $datatype_transformations = array(
- '/^(TINY|SMALL)INT( )?(\\([0-9]+\\))?( )?(UNSIGNED)?$/i' => 'SMALLINT',
- '/^(MEDIUM)?INT( )?(\\([0-9]+\\))?( )?(UNSIGNED)?$/i' => 'INTEGER',
- '/^BIGINT( )?(\\([0-9]+\\))?( )?(UNSIGNED)?$/i' => 'BIGINT',
- '/^(TINY|MEDIUM|LONG)?TEXT$/i' => 'TEXT',
- '/^DOUBLE( )?(\\([0-9,]+\\))?( )?(UNSIGNED)?$/i' => 'DOUBLE PRECISION',
- '/^FLOAT( )?(\\([0-9]+\\))?( )?(UNSIGNED)?$/i' => 'REAL'
- );
- function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
- {
- $this->prefix = $db_prefix;
- if ($db_host)
- {
- if (strpos($db_host, ':') !== false)
- {
- list($db_host, $dbport) = explode(':', $db_host);
- $connect_str[] = 'host='.$db_host.' port='.$dbport;
- }
- else
- $connect_str[] = 'host='.$db_host;
- }
- if ($db_name)
- $connect_str[] = 'dbname='.$db_name;
- if ($db_username)
- $connect_str[] = 'user='.$db_username;
- if ($db_password)
- $connect_str[] = 'password='.$db_password;
- if ($p_connect)
- $this->link_id = @pg_pconnect(implode(' ', $connect_str));
- else
- $this->link_id = @pg_connect(implode(' ', $connect_str));
- if (!$this->link_id)
- error('Unable to connect to PostgreSQL server', __FILE__, __LINE__);
- // Setup the client-server character set (UTF-8)
- if (!defined('FORUM_NO_SET_NAMES'))
- $this->set_names('utf8');
- return $this->link_id;
- }
- function start_transaction()
- {
- ++$this->in_transaction;
- return (@pg_query($this->link_id, 'BEGIN')) ? true : false;
- }
- function end_transaction()
- {
- --$this->in_transaction;
- if (@pg_query($this->link_id, 'COMMIT'))
- return true;
- else
- {
- @pg_query($this->link_id, 'ROLLBACK');
- return false;
- }
- }
- function query($sql, $unbuffered = false) // $unbuffered is ignored since there is no pgsql_unbuffered_query()
- {
- if (strrpos($sql, 'LIMIT') !== false)
- $sql = preg_replace('#LIMIT ([0-9]+),([ 0-9]+)#', 'LIMIT \\2 OFFSET \\1', $sql);
- if (defined('PUN_SHOW_QUERIES'))
- $q_start = get_microtime();
- @pg_send_query($this->link_id, $sql);
- $this->query_result = @pg_get_result($this->link_id);
- if (pg_result_status($this->query_result) != PGSQL_FATAL_ERROR)
- {
- if (defined('PUN_SHOW_QUERIES'))
- $this->saved_queries[] = array($sql, sprintf('%.5f', get_microtime() - $q_start));
- ++$this->num_queries;
- $this->last_query_text[$this->query_result] = $sql;
- return $this->query_result;
- }
- else
- {
- if (defined('PUN_SHOW_QUERIES'))
- $this->saved_queries[] = array($sql, 0);
- $this->error_no = false;
- $this->error_msg = @pg_result_error($this->query_result);
- if ($this->in_transaction)
- @pg_query($this->link_id, 'ROLLBACK');
- --$this->in_transaction;
- return false;
- }
- }
-
- /**
- * This function mimics the functionality for the 'ON DUPLICATE KEY UPDATE' command in MySQL5.
- * With PostgreSQL, we will be taking the long way around of checking to see if it exists.
- * This function now excepts an array value for $primaryKey, allowing more complex inserts or updates.
- */
- function insert_or_update($fields, $primaryKey, $table, $fields_to_update = array()) {
- $keyList = '';
- if (is_array($primaryKey)) {
-
- if (count($primaryKey) == 0) {
- $this->error_msg = 'No Primary keys passed.';
- return false;
- } //End if.
- $sql = "SELECT ".$primaryKey[0]." FROM ".$table." WHERE ";
-
- foreach ($primaryKey as $key) {
- if (!isset($fields[$key])) {
- $this->error_msg = 'Primary key value missing.';
- return false;
- } //End if.
-
- $keyList .= $key."=".(is_string($fields[$key]) ? "'".$fields[$key]."'": $fields[$key])." AND ";
-
- } //End foreach().
-
- //Get rid fo the last " AND " bit.
- $keyList = substr($keyList, 0, -4);
- $sql .= $keyList;
- } else {
- if (!isset($fields[$primaryKey])) {
- $this->error_msg = 'Primary key value missing.';
- return false;
- } //End if.
-
- $sql = "SELECT ".$primaryKey." FROM ".$table." WHERE ".$primaryKey."=".(is_string($fields[$primaryKey]) ? "'".$fields[$primaryKey]."'": $fields[$primaryKey]);
- } //End if - else.
-
- if (!$result = $this->query($sql)) {
- return false;
- } //End if.
-
- if ($this->num_rows($result) == 1) {
- //Lets do an update.
- $update_fields = "";
- if (empty($fields_to_update)) {
-
- foreach($fields as $key => $value) {
- $update_fields .= $key."=".(is_string($value) ? "'".$value."'": $value).",";
- } //End foreach().
- } else {
- foreach($fields_to_update as $key => $value) {
- $update_fields .= $key."=".(is_string($value) ? "'".$value."'": $value).",";
- } //End foreach().
- } //End if - else.
-
- $update_fields = substr($update_fields, 0, -1);
- if (is_array($primaryKey)) {
- $sql = "UPDATE ".$table." SET ".$update_fields." WHERE ".$keyList;
- } else {
- $sql = "UPDATE ".$table." SET ".$update_fields." WHERE ".$primaryKey."=".(is_string($value) ? "'".$fields[$primaryKey]."'": $fields[$primaryKey]);
- } //End if - else.
- } else {
- //Insert that data, baby.
- $table_fields = $table."(";
- $insert_fields = "VALUES(";
-
- foreach($fields as $key => $value) {
- $insert_fields .= (is_string($value) ? "'".$value."'": $value).",";
- $table_fields .= $key.',';
- } //End foreach().
-
- $insert_fields = substr($insert_fields, 0, -1);
- $table_fields = substr($table_fields, 0, -1);
-
- $table_fields .= ")";
- $insert_fields .= ")";
-
- $sql = "INSERT INTO ".$table_fields." ".$insert_fields.";";
-
- } //End if - else.
-
- return $this->query($sql);
-
- } //End insert_or_update().
- function result($query_id = 0, $row = 0, $col = 0)
- {
- return ($query_id) ? @pg_fetch_result($query_id, $row, $col) : false;
- }
- function fetch_assoc($query_id = 0)
- {
- return ($query_id) ? @pg_fetch_assoc($query_id) : false;
- }
- function fetch_row($query_id = 0)
- {
- return ($query_id) ? @pg_fetch_row($query_id) : false;
- }
- function num_rows($query_id = 0)
- {
- return ($query_id) ? @pg_num_rows($query_id) : false;
- }
- function affected_rows()
- {
- return ($this->query_result) ? @pg_affected_rows($this->query_result) : false;
- }
- function insert_id()
- {
- $query_id = $this->query_result;
- if ($query_id && $this->last_query_text[$query_id] != '')
- {
- if (preg_match('/^INSERT INTO ([a-z0-9\_\-]+)/is', $this->last_query_text[$query_id], $table_name))
- {
- // Hack (don't ask)
- if (substr($table_name[1], -6) == 'groups')
- $table_name[1] .= '_g';
- $temp_q_id = @pg_query($this->link_id, 'SELECT currval(\''.$table_name[1].'_id_seq\')');
- return ($temp_q_id) ? intval(@pg_fetch_result($temp_q_id, 0)) : false;
- }
- }
- return false;
- }
- function get_num_queries()
- {
- return $this->num_queries;
- }
- function get_saved_queries()
- {
- return $this->saved_queries;
- }
- function free_result($query_id = false)
- {
- if (!$query_id)
- $query_id = $this->query_result;
- return ($query_id) ? @pg_free_result($query_id) : false;
- }
- function escape($str)
- {
- return is_array($str) ? '' : pg_escape_string($str);
- }
- function error()
- {
- $result['error_sql'] = @current(@end($this->saved_queries));
- $result['error_no'] = $this->error_no;
- $result['error_msg'] = $this->error_msg;
- return $result;
- }
- function close()
- {
- if ($this->link_id)
- {
- if ($this->in_transaction)
- {
- if (defined('PUN_SHOW_QUERIES'))
- $this->saved_queries[] = array('COMMIT', 0);
- @pg_query($this->link_id, 'COMMIT');
- }
- if ($this->query_result)
- @pg_free_result($this->query_result);
- return @pg_close($this->link_id);
- }
- else
- return false;
- }
- function get_names()
- {
- $result = $this->query('SHOW client_encoding');
- return strtolower($this->result($result)); // MySQL returns lowercase so lets be consistent
- }
- function set_names($names)
- {
- return $this->query('SET NAMES \''.$this->escape($names).'\'');
- }
- function get_version()
- {
- $result = $this->query('SELECT VERSION()');
- return array(
- 'name' => 'PostgreSQL',
- 'version' => preg_replace('/^[^0-9]+([^\s,-]+).*$/', '\\1', $this->result($result))
- );
- }
- function table_exists($table_name, $no_prefix = false)
- {
- $result = $this->query('SELECT 1 FROM pg_class WHERE relname = \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\'');
- return $this->num_rows($result) > 0;
- }
- function field_exists($table_name, $field_name, $no_prefix = false)
- {
- $result = $this->query('SELECT 1 FROM pg_class c INNER JOIN pg_attribute a ON a.attrelid = c.oid WHERE c.relname = \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\' AND a.attname = \''.$this->escape($field_name).'\'');
- return $this->num_rows($result) > 0;
- }
- function index_exists($table_name, $index_name, $no_prefix = false)
- {
- $result = $this->query('SELECT 1 FROM pg_index i INNER JOIN pg_class c1 ON c1.oid = i.indrelid INNER JOIN pg_class c2 ON c2.oid = i.indexrelid WHERE c1.relname = \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\' AND c2.relname = \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'_'.$this->escape($index_name).'\'');
- return $this->num_rows($result) > 0;
- }
- function create_table($table_name, $schema, $no_prefix = false)
- {
- if ($this->table_exists($table_name, $no_prefix))
- return true;
- $query = 'CREATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name." (\n";
- // Go through every schema element and add it to the query
- foreach ($schema['FIELDS'] as $field_name => $field_data)
- {
- $field_data['datatype'] = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_data['datatype']);
- $query .= $field_name.' '.$field_data['datatype'];
- (!isset($field_data['allow_null'])) ? $field_data['allow_null'] = false : '';
- // The SERIAL datatype is a special case where we don't need to say not null
- if (!$field_data['allow_null'] && $field_data['datatype'] != 'SERIAL')
- $query .= ' NOT NULL';
- if (isset($field_data['default']))
- $query .= ' DEFAULT '.$field_data['default'];
- $query .= ",\n";
- }
- // If we have a primary key, add it
- if (isset($schema['PRIMARY KEY']))
- $query .= 'PRIMARY KEY ('.implode(',', $schema['PRIMARY KEY']).'),'."\n";
- // Add unique keys
- if (isset($schema['UNIQUE KEYS']))
- {
- foreach ($schema['UNIQUE KEYS'] as $key_name => $key_fields)
- $query .= 'UNIQUE ('.implode(',', $key_fields).'),'."\n";
- }
- // We remove the last two characters (a newline and a comma) and add on the ending
- $query = substr($query, 0, strlen($query) - 2)."\n".')';
- $result = $this->query($query) ? true : false;
- // Add indexes
- if (isset($schema['INDEXES']))
- {
- foreach ($schema['INDEXES'] as $index_name => $index_fields)
- $result &= $this->add_index($table_name, $index_name, $index_fields, false, $no_prefix);
- }
- return $result;
- }
- function drop_table($table_name, $no_prefix = false)
- {
- if (!$this->table_exists($table_name, $no_prefix))
- return true;
- return $this->query('DROP TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false;
- }
- function add_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false)
- {
- if ($this->field_exists($table_name, $field_name, $no_prefix))
- return true;
- $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type);
- $result = $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.$field_name.' '.$field_type) ? true : false;
- if ($default_value !== null)
- {
- if (!is_int($default_value) && !is_float($default_value))
- $default_value = '\''.$this->escape($default_value).'\'';
- $result &= $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ALTER '.$field_name.' SET DEFAULT '.$default_value) ? true : false;
- $result &= $this->query('UPDATE '.($no_prefix ? '' : $this->prefix).$table_name.' SET '.$field_name.'='.$default_value) ? true : false;
- }
- if (!$allow_null)
- $result &= $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ALTER '.$field_name.' SET NOT NULL') ? true : false;
- return $result;
- }
-
- function rename_table($old_table, $new_table, $no_prefix = false)
- {
- // If there new table exists and the old one doesn't, then we're happy
- if ($this->table_exists($new_table, $no_prefix) && !$this->table_exists($old_table, $no_prefix))
- return true;
-
- return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$old_table.' RENAME TO '.($no_prefix ? '' : $this->prefix).$new_table) ? true : false;
- }
- function alter_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false)
- {
- if (!$this->field_exists($table_name, $field_name, $no_prefix))
- return true;
- $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type);
- $result = $this->add_field($table_name, 'tmp_'.$field_name, $field_type, $allow_null, $default_value, $after_field, $no_prefix);
- $result &= $this->query('UPDATE '.($no_prefix ? '' : $this->prefix).$table_name.' SET tmp_'.$field_name.' = '.$field_name) ? true : false;
- $result &= $this->drop_field($table_name, $field_name, $no_prefix);
- $result &= $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' RENAME COLUMN tmp_'.$field_name.' TO '.$field_name) ? true : false;
- return $result;
- }
- function drop_field($table_name, $field_name, $no_prefix = false)
- {
- if (!$this->field_exists($table_name, $field_name, $no_prefix))
- return true;
- return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP '.$field_name) ? true : false;
- }
- function add_index($table_name, $index_name, $index_fields, $unique = false, $no_prefix = false)
- {
- if ($this->index_exists($table_name, $index_name, $no_prefix))
- return true;
- return $this->query('CREATE '.($unique ? 'UNIQUE ' : '').'INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.' ON '.($no_prefix ? '' : $this->prefix).$table_name.'('.implode(',', $index_fields).')') ? true : false;
- }
- function drop_index($table_name, $index_name, $no_prefix = false)
- {
- if (!$this->index_exists($table_name, $index_name, $no_prefix))
- return true;
- return $this->query('DROP INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name) ? true : false;
- }
- function truncate_table($table_name, $no_prefix = false)
- {
- return $this->query('DELETE FROM '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false;
- }
- }