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<?php
/**********************************************************************************
* DbExtra-postgresql.php *
***********************************************************************************
* SMF: Simple Machines Forum *
* Open-Source Project Inspired by Zef Hemel (zef@zefhemel.com) *
* =============================================================================== *
* Software Version: SMF 2.0 RC1 *
* Software by: Simple Machines (http://www.simplemachines.org) *
* Copyright 2006-2009 by: Simple Machines LLC (http://www.simplemachines.org) *
* 2001-2006 by: Lewis Media (http://www.lewismedia.com) *
* Support, News, Updates at: http://www.simplemachines.org *
***********************************************************************************
* This program is free software; you may redistribute it and/or modify it under *
* the terms of the provided license as published by Simple Machines LLC. *
* *
* This program is distributed in the hope that it is and will be useful, but *
* WITHOUT ANY WARRANTIES; without even any implied warranty of MERCHANTABILITY *
* or FITNESS FOR A PARTICULAR PURPOSE. *
* *
* See the "license.txt" file for details of the Simple Machines license. *
* The latest version can always be found at http://www.simplemachines.org. *
**********************************************************************************/
if (!defined('SMF'))
die('Hacking attempt...');
/* This file contains rarely used extended database functionality.
// !!!
string db_insert_sql(string table_name)
- gets all the necessary INSERTs for the table named table_name.
- goes in 250 row segments.
- returns the query to insert the data back in.
- returns an empty string if the table was empty.
string db_table_sql(string table_name)
- dumps the CREATE for the specified table. (by table_name.)
- returns the CREATE statement.
*/
// Add the file functions to the $smcFunc array.
function db_extra_init()
{
global $smcFunc;
if (!isset($smcFunc['db_backup_table']) || $smcFunc['db_backup_table'] != 'smf_db_backup_table')
$smcFunc += array(
'db_backup_table' => 'smf_db_backup_table',
'db_optimize_table' => 'smf_db_optimize_table',
'db_insert_sql' => 'smf_db_insert_sql',
'db_table_sql' => 'smf_db_table_sql',
'db_list_tables' => 'smf_db_list_tables',
'db_get_version' => 'smf_db_get_version',
);
}
// Backup $table to $backup_table.
function smf_db_backup_table($table, $backup_table)
{
global $smcFunc, $db_prefix;
$table = str_replace('{db_prefix}', $db_prefix, $table);
// Do we need to drop it first?
$tables = smf_db_list_tables(false, $backup_table);
if (!empty($tables))
$smcFunc['db_query']('', '
DROP TABLE {raw:backup_table}',
array(
'backup_table' => $backup_table,
)
);
//!!! Does not work at the moment!
$smcFunc['db_query']('', '
CREATE TABLE {raw:backup_table}
AS SELECT * FROM {raw:table}',
array(
'backup_table' => $backup_table,
'table' => $table,
)
);
$smcFunc['db_query']('', '
INSERT INTO {raw:backup_table}
SELECT * FROM {raw:table}',
array(
'backup_table' => $backup_table,
'table' => $table,
)
);
}
// Optimize a table - return data freed!
function smf_db_optimize_table($table)
{
global $smcFunc, $db_prefix;
$table = str_replace('{db_prefix}', $db_prefix, $table);
$request = $smcFunc['db_query']('', '
VACUUM ANALYZE {raw:table}',
array(
'table' => $table,
)
);
if (!$request)
return -1;
$row = $smcFunc['db_fetch_assoc']($request);
$smcFunc['db_free_result']($request);
if (isset($row['Data_free']))
return $row['Data_free'] / 1024;
else
return 0;
}
// List all the tables in the database.
function smf_db_list_tables($db = false, $filter = false)
{
global $smcFunc;
$request = $smcFunc['db_query']('', '
SELECT tablename
FROM pg_tables
WHERE schemaname = {string:schema_public}' . ($filter == false ? '' : '
AND tablename LIKE {string:filter}') . '
ORDER BY tablename',
array(
'schema_public' => 'public',
'filter' => $filter,
)
);
$tables = array();
while ($row = $smcFunc['db_fetch_row']($request))
$tables[] = $row[0];
$smcFunc['db_free_result']($request);
return $tables;
}
// Get the content (INSERTs) for a table.
function smf_db_insert_sql($tableName)
{
global $smcFunc, $db_prefix;
$tableName = str_replace('{db_prefix}', $db_prefix, $tableName);
// This will be handy...
$crlf = "\r\n";
// Get everything from the table.
$result = $smcFunc['db_query']('', '
SELECT *
FROM {raw:table}',
array(
'table' => $tableName,
)
);
// The number of rows, just for record keeping and breaking INSERTs up.
$num_rows = $smcFunc['db_num_rows']($result);
$current_row = 0;
if ($num_rows == 0)
return '';
$fields = array_keys($smcFunc['db_fetch_assoc']($result));
$smcFunc['db_data_seek']($result, 0);
// Start it off with the basic INSERT INTO.
$data = '';
$insert_msg = $crlf . 'INSERT INTO ' . $tableName . $crlf . "\t" . '(' . implode(', ', $fields) . ')' . $crlf . 'VALUES ' . $crlf . "\t";
// Loop through each row.
while ($row = $smcFunc['db_fetch_row']($result))
{
$current_row++;
// Get the fields in this row...
$field_list = array();
for ($j = 0; $j < $smcFunc['db_num_fields']($result); $j++)
{
// Try to figure out the type of each field. (NULL, number, or 'string'.)
if (!isset($row[$j]))
$field_list[] = 'NULL';
elseif (is_numeric($row[$j]))
$field_list[] = $row[$j];
else
$field_list[] = '\'' . $smcFunc['db_escape_string']($row[$j]) . '\'';
}
// 'Insert' the data.
$data .= $insert_msg . '(' . implode(', ', $field_list) . ');';
}
$smcFunc['db_free_result']($result);
// Return an empty string if there were no rows.
return $num_rows == 0 ? '' : $data;
}
// Get the schema (CREATE) for a table.
function smf_db_table_sql($tableName)
{
global $smcFunc, $db_prefix;
$tableName = str_replace('{db_prefix}', $db_prefix, $tableName);
// This will be needed...
$crlf = "\r\n";
// Start the create table...
$schema_create = 'CREATE TABLE ' . $tableName . ' (' . $crlf;
$index_create = '';
$seq_create = '';
// Find all the fields.
$result = $smcFunc['db_query']('', '
SELECT column_name, column_default, is_nullable, data_type, character_maximum_length
FROM information_schema.columns
WHERE table_name = {string:table}
ORDER BY ordinal_position',
array(
'table' => $tableName,
)
);
while ($row = $smcFunc['db_fetch_assoc']($result))
{
if ($row['data_type'] == 'character varying')
$row['data_type'] = 'varchar';
elseif ($row['data_type'] == 'character')
$row['data_type'] = 'char';
if ($row['character_maximum_length'])
$row['data_type'] .= '(' . $row['character_maximum_length'] . ')';
// Make the CREATE for this column.
$schema_create .= ' ' . $row['column_name'] . ' ' . $row['data_type'] . ($row['is_nullable'] != 'YES' ? ' NOT NULL' : '');
// Add a default...?
if (trim($row['column_default']) != '')
{
$schema_create .= ' default ' . $row['column_default'] . '';
// Auto increment?
if (preg_match('~nextval\(\'(.+?)\'(.+?)*\)~i', $row['column_default'], $matches) != 0)
{
// Get to find the next variable first!
$count_req = $smcFunc['db_query']('', '
SELECT MAX({raw:column})
FROM {raw:table}',
array(
'column' => $row['column_name'],
'table' => $tableName,
)
);
list ($max_ind) = $smcFunc['db_fetch_row']($count_req);
$smcFunc['db_free_result']($count_req);
//!!! Get the right bloody start!
$seq_create .= 'CREATE SEQUENCE ' . $matches[1] . ' START WITH ' . ($max_ind+ 1) . ';' . $crlf . $crlf;
}
}
$schema_create .= ',' . $crlf;
}
$smcFunc['db_free_result']($result);
// Take off the last comma.
$schema_create = substr($schema_create, 0, -strlen($crlf) - 1);
$result = $smcFunc['db_query']('', '
SELECT CASE WHEN i.indisprimary THEN 1 ELSE 0 END AS is_primary, pg_get_indexdef(i.indexrelid) AS inddef
FROM pg_class AS c, pg_class AS c2, pg_index AS i
WHERE c.relname = {string:table}
AND c.oid = i.indrelid
AND i.indexrelid = c2.oid',
array(
'table' => $tableName,
)
);
$indexes = array();
while ($row = $smcFunc['db_fetch_assoc']($result))
{
if ($row['is_primary'])
{
if (preg_match('~\(([^\)]+?)\)~i', $row['inddef'], $matches) == 0)
continue;
$index_create .= $crlf . 'ALTER TABLE ' . $tableName . ' ADD PRIMARY KEY (' . $matches[1] . ');';
}
else
$index_create .= $crlf . $row['inddef'] . ';';
}
$smcFunc['db_free_result']($result);
// Finish it off!
$schema_create .= $crlf . ');';
return $seq_create . $schema_create . $index_create;
}
// Get the version number.
function smf_db_get_version()
{
global $smcFunc;
$request = $smcFunc['db_query']('', '
SHOW server_version',
array(
)
);
list ($ver) = $smcFunc['db_fetch_row']($request);
$smcFunc['db_free_result']($request);
return $ver;
}
?>