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-rw-r--r--include/dblayer/pgsql.php442
1 files changed, 442 insertions, 0 deletions
diff --git a/include/dblayer/pgsql.php b/include/dblayer/pgsql.php
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+<?php
+
+/**
+ * Copyright (C) 2008-2012 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)?$%i' => 'REAL'
+ );
+
+
+ function __construct($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 $this->link_id;
+ }
+
+
+ function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
+ {
+ $this->__construct($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect);
+ }
+
+
+ function start_transaction()
+ {
+ ++$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;
+
+ $this->last_query_text[intval($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');
+
+ --$this->in_transaction;
+
+ return false;
+ }
+ }
+
+
+ function result($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 && $this->last_query_text[intval($query_id)] != '')
+ {
+ if (preg_match('%^INSERT INTO ([a-z0-9\_\-]+)%is', $this->last_query_text[intval($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'];
+
+ // 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 rename_table($old_table, $new_table, $no_prefix = false)
+ {
+ // If the new table exists and the old one doesn't, then we're happy
+ if ($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 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 (!is_null($default_value))
+ {
+ if (!is_int($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 $result;
+ }
+
+
+ function alter_field($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;
+ }
+}