Current File : /www/old2/_music/diplomka/diplomka/src/API/libs/Nette/Database/Drivers/PgSqlDriver.php
<?php
/**
* This file is part of the Nette Framework (http://nette.org)
*
* Copyright (c) 2004 David Grudl (http://davidgrudl.com)
*
* For the full copyright and license information, please view
* the file license.txt that was distributed with this source code.
*/
namespace Nette\Database\Drivers;
use Nette;
/**
* Supplemental PostgreSQL database driver.
*
* @author David Grudl
*/
class PgSqlDriver extends Nette\Object implements Nette\Database\ISupplementalDriver
{
/** @var Nette\Database\Connection */
private $connection;
public function __construct(Nette\Database\Connection $connection, array $options)
{
$this->connection = $connection;
}
/********************* SQL ****************d*g**/
/**
* Delimites identifier for use in a SQL statement.
*/
public function delimite($name)
{
// @see http://www.postgresql.org/docs/8.2/static/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS
return '"' . str_replace('"', '""', $name) . '"';
}
/**
* Formats boolean for use in a SQL statement.
*/
public function formatBool($value)
{
return $value ? 'TRUE' : 'FALSE';
}
/**
* Formats date-time for use in a SQL statement.
*/
public function formatDateTime(\DateTime $value)
{
return $value->format("'Y-m-d H:i:s'");
}
/**
* Encodes string for use in a LIKE statement.
*/
public function formatLike($value, $pos)
{
$value = strtr($value, array("'" => "''", '\\' => '\\\\', '%' => '\\\\%', '_' => '\\\\_'));
return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'");
}
/**
* Injects LIMIT/OFFSET to the SQL query.
*/
public function applyLimit(&$sql, $limit, $offset)
{
if ($limit >= 0) {
$sql .= ' LIMIT ' . (int) $limit;
}
if ($offset > 0) {
$sql .= ' OFFSET ' . (int) $offset;
}
}
/**
* Normalizes result row.
*/
public function normalizeRow($row, $statement)
{
return $row;
}
/********************* reflection ****************d*g**/
/**
* Returns list of tables.
*/
public function getTables()
{
$tables = array();
foreach ($this->connection->query("
SELECT
c.relname::varchar AS name,
c.relkind = 'v' AS view
FROM
pg_catalog.pg_class AS c
JOIN pg_catalog.pg_namespace AS n ON n.oid = c.relnamespace
WHERE
c.relkind IN ('r', 'v')
AND n.nspname = current_schema()
ORDER BY
c.relname
") as $row) {
$tables[] = (array) $row;
}
return $tables;
}
/**
* Returns metadata for all columns in a table.
*/
public function getColumns($table)
{
$columns = array();
foreach ($this->connection->query("
SELECT
a.attname::varchar AS name,
c.relname::varchar AS table,
upper(t.typname) AS nativetype,
NULL AS size,
FALSE AS unsigned,
NOT (a.attnotnull OR t.typtype = 'd' AND t.typnotnull) AS nullable,
ad.adsrc::varchar AS default,
coalesce(co.contype = 'p' AND strpos(ad.adsrc, 'nextval') = 1, FALSE) AS autoincrement,
coalesce(co.contype = 'p', FALSE) AS primary,
substring(ad.adsrc from 'nextval[(]''\"?([^''\"]+)') AS sequence
FROM
pg_catalog.pg_attribute AS a
JOIN pg_catalog.pg_class AS c ON a.attrelid = c.oid
JOIN pg_catalog.pg_namespace AS n ON n.oid = c.relnamespace
JOIN pg_catalog.pg_type AS t ON a.atttypid = t.oid
LEFT JOIN pg_catalog.pg_attrdef AS ad ON ad.adrelid = c.oid AND ad.adnum = a.attnum
LEFT JOIN pg_catalog.pg_constraint AS co ON co.connamespace = n.oid AND contype = 'p' AND co.conrelid = c.oid AND a.attnum = ANY(co.conkey)
WHERE
c.relkind IN ('r', 'v')
AND c.relname::varchar = {$this->connection->quote($table)}
AND n.nspname = current_schema()
AND a.attnum > 0
AND NOT a.attisdropped
ORDER BY
a.attnum
") as $row) {
$column = (array) $row;
$column['vendor'] = $column;
unset($column['sequence']);
$columns[] = $column;
}
return $columns;
}
/**
* Returns metadata for all indexes in a table.
*/
public function getIndexes($table)
{
$indexes = array();
foreach ($this->connection->query("
SELECT
c2.relname::varchar AS name,
i.indisunique AS unique,
i.indisprimary AS primary,
a.attname::varchar AS column
FROM
pg_catalog.pg_class AS c1
JOIN pg_catalog.pg_namespace AS n ON c1.relnamespace = n.oid
JOIN pg_catalog.pg_index AS i ON c1.oid = i.indrelid
JOIN pg_catalog.pg_class AS c2 ON i.indexrelid = c2.oid
LEFT JOIN pg_catalog.pg_attribute AS a ON c1.oid = a.attrelid AND a.attnum = ANY(i.indkey)
WHERE
n.nspname = current_schema()
AND c1.relkind = 'r'
AND c1.relname = {$this->connection->quote($table)}
") as $row) {
$indexes[$row['name']]['name'] = $row['name'];
$indexes[$row['name']]['unique'] = $row['unique'];
$indexes[$row['name']]['primary'] = $row['primary'];
$indexes[$row['name']]['columns'][] = $row['column'];
}
return array_values($indexes);
}
/**
* Returns metadata for all foreign keys in a table.
*/
public function getForeignKeys($table)
{
/* Does't work with multicolumn foreign keys */
return $this->connection->query("
SELECT
co.conname::varchar AS name,
al.attname::varchar AS local,
cf.relname::varchar AS table,
af.attname::varchar AS foreign
FROM
pg_catalog.pg_constraint AS co
JOIN pg_catalog.pg_namespace AS n ON co.connamespace = n.oid
JOIN pg_catalog.pg_class AS cl ON co.conrelid = cl.oid
JOIN pg_catalog.pg_class AS cf ON co.confrelid = cf.oid
JOIN pg_catalog.pg_attribute AS al ON al.attrelid = cl.oid AND al.attnum = co.conkey[1]
JOIN pg_catalog.pg_attribute AS af ON af.attrelid = cf.oid AND af.attnum = co.confkey[1]
WHERE
n.nspname = current_schema()
AND co.contype = 'f'
AND cl.relname = {$this->connection->quote($table)}
")->fetchAll();
}
/**
* @return bool
*/
public function isSupported($item)
{
return $item === self::SUPPORT_COLUMNS_META || $item === self::SUPPORT_SEQUENCE;
}
}
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