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<?php
/**
* A class that implements the DB interface for Postgres
* Note: This class uses ADODB and returns RecordSets.
*
* $Id: Postgres71.php,v 1.74 2005/10/18 03:45:16 chriskl Exp $
*/
// @@@ THOUGHT: What about inherits? ie. use of ONLY???
include_once('./classes/database/Postgres.php');
class Postgres71 extends Postgres {
var $major_version = 7.1;
var $_lastSystemOID = 18539;
var $_maxNameLen = 31;
// List of all legal privileges that can be applied to different types
// of objects.
var $privlist = array(
'table' => array('SELECT', 'INSERT', 'UPDATE', 'DELETE', 'RULE', 'ALL'),
'view' => array('SELECT', 'INSERT', 'UPDATE', 'DELETE', 'RULE', 'ALL'),
'sequence' => array('SELECT', 'UPDATE', 'ALL')
);
// List of characters in acl lists and the privileges they
// refer to.
var $privmap = array(
'r' => 'SELECT',
'w' => 'UPDATE',
'a' => 'INSERT',
'd' => 'DELETE',
'R' => 'RULE',
'x' => 'REFERENCES',
't' => 'TRIGGER',
'X' => 'EXECUTE',
'U' => 'USAGE',
'C' => 'CREATE',
'T' => 'TEMPORARY'
);
// Function properties
var $funcprops = array(array('', 'ISSTRICT'), array('', 'ISCACHABLE'));
var $defaultprops = array('', '');
// Select operators
var $selectOps = array('=' => 'i', '!=' => 'i', '<' => 'i', '>' => 'i', '<=' => 'i', '>=' => 'i', 'LIKE' => 'i', 'NOT LIKE' => 'i',
'ILIKE' => 'i', 'NOT ILIKE' => 'i', '~' => 'i', '!~' => 'i', '~*' => 'i', '!~*' => 'i',
'IS NULL' => 'p', 'IS NOT NULL' => 'p', 'IN' => 'x', 'NOT IN' => 'x');
// Supported join operations for use with view wizard
var $joinOps = array('INNER JOIN' => 'INNER JOIN', 'LEFT JOIN' => 'LEFT JOIN', 'RIGHT JOIN' => 'RIGHT JOIN', 'FULL JOIN' => 'FULL JOIN');
/**
* Constructor
* @param $conn The database connection
*/
function Postgres71($conn) {
$this->Postgres($conn);
}
// Help functions
function getHelpPages() {
include_once('./help/PostgresDoc71.php');
return $this->help_page;
}
/**
* Sets the client encoding
* @param $encoding The encoding to for the client
* @return 0 success
*/
function setClientEncoding($encoding) {
$this->clean($encoding);
$sql = "SET CLIENT_ENCODING TO '{$encoding}'";
return $this->execute($sql);
}
// Database functions
/**
* Return all database available on the server
* @return A list of databases, sorted alphabetically
*/
function getDatabases($currentdatabase = NULL) {
global $conf, $misc;
$server_info = $misc->getServerInfo();
if (isset($conf['owned_only']) && $conf['owned_only'] && !$this->isSuperUser($server_info['username'])) {
$username = $server_info['username'];
$this->clean($username);
$clause = " AND pu.usename='{$username}'";
}
else $clause = '';
if ($currentdatabase != NULL)
$orderby = "ORDER BY pdb.datname = '{$currentdatabase}' DESC, pdb.datname";
else
$orderby = "ORDER BY pdb.datname";
if (!$conf['show_system'])
$where = ' AND NOT pdb.datistemplate';
else
$where = ' AND pdb.datallowconn';
$sql = "SELECT pdb.datname AS datname, pu.usename AS datowner, pg_encoding_to_char(encoding) AS datencoding,
(SELECT description FROM pg_description pd WHERE pdb.oid=pd.objoid) AS datcomment
FROM pg_database pdb, pg_user pu
WHERE pdb.datdba = pu.usesysid
{$where}
{$clause}
{$orderby}";
return $this->selectSet($sql);
}
// Table functions
/**
* Finds the number of rows that would be returned by a
* query.
* @param $query The SQL query
* @param $count The count query
* @return The count of rows
* @return -1 error
*/
function browseQueryCount($query, $count) {
return $this->selectField($count, 'total');
}
/**
* Retrieve the attribute definition of a table
* @param $table The name of the table
* @param $field (optional) The name of a field to return
* @return All attributes in order
*/
function getTableAttributes($table, $field = '') {
$this->clean($table);
$this->clean($field);
if ($field == '') {
$sql = "SELECT
a.attname, t.typname as type, a.attlen, a.atttypmod, a.attnotnull,
a.atthasdef, adef.adsrc, -1 AS attstattarget, a.attstorage, t.typstorage,
false AS attisserial,
(SELECT description FROM pg_description d WHERE d.objoid = a.oid) as comment
FROM
pg_attribute a LEFT JOIN pg_attrdef adef
ON a.attrelid=adef.adrelid AND a.attnum=adef.adnum,
pg_class c,
pg_type t
WHERE
c.relname = '{$table}' AND a.attnum > 0 AND a.attrelid = c.oid AND a.atttypid = t.oid
ORDER BY a.attnum";
}
else {
$sql = "SELECT
a.attname, t.typname as type, t.typname as base_type,
a.attlen, a.atttypmod, a.attnotnull,
a.atthasdef, adef.adsrc, -1 AS attstattarget, a.attstorage, t.typstorage,
(SELECT description FROM pg_description d WHERE d.objoid = a.oid) as comment
FROM
pg_attribute a LEFT JOIN pg_attrdef adef
ON a.attrelid=adef.adrelid AND a.attnum=adef.adnum,
pg_class c,
pg_type t
WHERE
c.relname = '{$table}' AND a.attname='{$field}' AND a.attrelid = c.oid AND a.atttypid = t.oid";
}
return $this->selectSet($sql);
}
/**
* Formats a type correctly for display. This is a no-op in PostgreSQL 7.1+
* @param $typname The name of the type
* @param $typmod The contents of the typmod field
*/
function formatType($typname, $typmod) {
return $typname;
}
// Sequence functions
/**
* Resets a given sequence to min value of sequence
* @param $sequence Sequence name
* @return 0 success
* @return -1 sequence not found
*/
function resetSequence($sequence) {
// Get the minimum value of the sequence
$seq = $this->getSequence($sequence);
if ($seq->recordCount() != 1) return -1;
$minvalue = $seq->f['min_value'];
/* This double-cleaning is deliberate */
$this->fieldClean($sequence);
$this->clean($sequence);
$sql = "SELECT SETVAL('\"{$sequence}\"', {$minvalue}, FALSE)";
return $this->execute($sql);
}
// Function functions
/**
* Returns all details for a particular function
* @param $func The name of the function to retrieve
* @return Function info
*/
function getFunction($function_oid) {
$this->clean($function_oid);
$sql = "SELECT
pc.oid AS prooid,
proname,
lanname as prolanguage,
format_type(prorettype, NULL) as proresult,
prosrc,
probin,
proretset,
proisstrict,
proiscachable,
oidvectortypes(pc.proargtypes) AS proarguments,
(SELECT description FROM pg_description pd WHERE pc.oid=pd.objoid) AS procomment
FROM
pg_proc pc, pg_language pl
WHERE
pc.oid = '$function_oid'::oid
AND pc.prolang = pl.oid
";
return $this->selectSet($sql);
}
/**
* Returns an array containing a function's properties
* @param $f The array of data for the function
* @return An array containing the properties
*/
function getFunctionProperties($f) {
$temp = array();
// Strict
$f['proisstrict'] = $this->phpBool($f['proisstrict']);
if ($f['proisstrict'])
$temp[] = 'ISSTRICT';
else
$temp[] = '';
// Cachable
$f['proiscachable'] = $this->phpBool($f['proiscachable']);
if ($f['proiscachable'])
$temp[] = 'ISCACHABLE';
else
$temp[] = '';
return $temp;
}
// Constraint functions
/**
* Returns a list of all constraints on a table
* @param $table The table to find rules for
* @return A recordset
*/
function getConstraints($table) {
$this->clean($table);
$status = $this->beginTransaction();
if ($status != 0) return -1;
$sql = "
SELECT conname, consrc, contype, indkey FROM (
SELECT
rcname AS conname,
'CHECK (' || rcsrc || ')' AS consrc,
'c' AS contype,
rcrelid AS relid,
NULL AS indkey
FROM
pg_relcheck
UNION ALL
SELECT
pc.relname,
NULL,
CASE WHEN indisprimary THEN
'p'
ELSE
'u'
END,
pi.indrelid,
indkey
FROM
pg_class pc,
pg_index pi
WHERE
pc.oid=pi.indexrelid
AND (pi.indisunique OR pi.indisprimary)
) AS sub
WHERE relid = (SELECT oid FROM pg_class WHERE relname='{$table}')
ORDER BY
1
";
return $this->selectSet($sql);
}
// Trigger functions
/**
* Grabs a list of triggers on a table
* @param $table The name of a table whose triggers to retrieve
* @return A recordset
*/
function getTriggers($table = '') {
$this->clean($table);
// We include constraint triggers
$sql = "SELECT t.tgname, t.tgisconstraint, t.tgdeferrable, t.tginitdeferred, t.tgtype,
t.tgargs, t.tgnargs, t.tgconstrrelid,
(SELECT relname FROM pg_class c2 WHERE c2.oid=t.tgconstrrelid) AS tgconstrrelname,
p.proname AS tgfname, c.relname, NULL AS tgdef
FROM pg_trigger t LEFT JOIN pg_proc p
ON t.tgfoid=p.oid, pg_class c
WHERE t.tgrelid=c.oid
AND c.relname='{$table}'";
return $this->selectSet($sql);
}
// Aggregate functions
/**
* Gets all aggregates
* @return A recordset
*/
function getAggregates() {
global $conf;
if ($conf['show_system'])
$where = '';
else
$where = "WHERE a.oid > '{$this->_lastSystemOID}'::oid";
$sql = "
SELECT
a.aggname AS proname,
CASE a.aggbasetype
WHEN 0 THEN NULL
ELSE format_type(a.aggbasetype, NULL)
END AS proargtypes,
(SELECT description FROM pg_description pd WHERE a.oid=pd.objoid) AS aggcomment
FROM
pg_aggregate a
{$where}
ORDER BY
1, 2;
";
return $this->selectSet($sql);
}
// Capabilities
function hasAlterTableOwner() { return true; }
function hasFullSubqueries() { return true; }
}
?>
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