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<?php
/**
* This file is part of the "dibi" - smart database abstraction layer.
*
* Copyright (c) 2005, 2010 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.
*
* @package dibi\drivers
*/
/**
* The dibi reflector for MsSQL databases.
*
* @author Steven Bredenberg
* @package dibi\drivers
* @internal
*/
class DibiMsSqlReflector extends DibiObject implements IDibiReflector
{
/** @var IDibiDriver */
private $driver;
public function __construct(IDibiDriver $driver)
{
$this->driver = $driver;
}
/**
* Returns list of tables.
* @return array
*/
public function getTables()
{
$res = $this->driver->query("
SELECT TABLE_NAME, TABLE_TYPE
FROM INFORMATION_SCHEMA.TABLES
");
$tables = array();
while ($row = $res->fetch(FALSE)) {
$tables[] = array(
'name' => $row[0],
'view' => isset($row[1]) && $row[1] === 'VIEW',
);
}
return $tables;
}
/**
* Returns count of rows in a table
* @param string
* @return integer
*/
public function getTableCount($table, $fallback=true)
{
if (empty($table)) {
return false;
}
$result = $this->driver->query("
SELECT MAX(rowcnt)
FROM sys.sysindexes
WHERE id=OBJECT_ID({$this->driver->escape($table, dibi::IDENTIFIER)})
");
$row = $result->fetch(FALSE);
if (!is_array($row) || count($row) < 1) {
if ($fallback) {
$row = $this->driver->query("SELECT COUNT(*) FROM {$this->driver->escape($table, dibi::IDENTIFIER)}")->fetch(FALSE);
$count = intval($row[0]);
} else {
$count = false;
}
} else {
$count = intval($row[0]);
}
return $count;
}
/**
* Returns metadata for all columns in a table.
* @param string
* @return array
*/
public function getColumns($table)
{
$res = $this->driver->query("
SELECT * FROM
INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = {$this->driver->escape($table, dibi::TEXT)}
ORDER BY TABLE_NAME, ORDINAL_POSITION
");
$columns = array();
while ($row = $res->fetch(TRUE)) {
$size = false;
$type = strtoupper($row['DATA_TYPE']);
$size_cols = array(
'DATETIME'=>'DATETIME_PRECISION',
'DECIMAL'=>'NUMERIC_PRECISION',
'CHAR'=>'CHARACTER_MAXIMUM_LENGTH',
'NCHAR'=>'CHARACTER_OCTET_LENGTH',
'NVARCHAR'=>'CHARACTER_OCTET_LENGTH',
'VARCHAR'=>'CHARACTER_OCTET_LENGTH'
);
if (isset($size_cols[$type])) {
if ($size_cols[$type]) {
$size = $row[$size_cols[$type]];
}
}
$columns[] = array(
'name' => $row['COLUMN_NAME'],
'table' => $table,
'nativetype' => $type,
'size' => $size,
'unsigned' => NULL,
'nullable' => $row['IS_NULLABLE'] === 'YES',
'default' => $row['COLUMN_DEFAULT'],
'autoincrement' => false,
'vendor' => $row,
);
}
return $columns;
}
/**
* Returns metadata for all indexes in a table.
* @param string
* @return array
*/
public function getIndexes($table)
{
$res = $this->driver->query(
"SELECT ind.name index_name, ind.index_id, ic.index_column_id,
col.name column_name, ind.is_unique, ind.is_primary_key
FROM sys.indexes ind
INNER JOIN sys.index_columns ic ON
(ind.object_id = ic.object_id AND ind.index_id = ic.index_id)
INNER JOIN sys.columns col ON
(ic.object_id = col.object_id and ic.column_id = col.column_id)
INNER JOIN sys.tables t ON
(ind.object_id = t.object_id)
WHERE t.name = {$this->driver->escape($table, dibi::TEXT)}
AND t.is_ms_shipped = 0
ORDER BY
t.name, ind.name, ind.index_id, ic.index_column_id
");
$indexes = array();
while ($row = $res->fetch(TRUE)) {
$index_name = $row['index_name'];
if (!isset($indexes[$index_name])) {
$indexes[$index_name] = array();
$indexes[$index_name]['name'] = $index_name;
$indexes[$index_name]['unique'] = (bool)$row['is_unique'];
$indexes[$index_name]['primary'] = (bool)$row['is_primary_key'];
$indexes[$index_name]['columns'] = array();
}
$indexes[$index_name]['columns'][] = $row['column_name'];
}
return array_values($indexes);
}
/**
* Returns metadata for all foreign keys in a table.
* @param string
* @return array
*/
public function getForeignKeys($table)
{
$res = $this->driver->query("
SELECT f.name AS foreign_key,
OBJECT_NAME(f.parent_object_id) AS table_name,
COL_NAME(fc.parent_object_id,
fc.parent_column_id) AS column_name,
OBJECT_NAME (f.referenced_object_id) AS reference_table_name,
COL_NAME(fc.referenced_object_id,
fc.referenced_column_id) AS reference_column_name,
fc.*
FROM sys.foreign_keys AS f
INNER JOIN sys.foreign_key_columns AS fc
ON f.OBJECT_ID = fc.constraint_object_id
WHERE OBJECT_NAME(f.parent_object_id) = {$this->driver->escape($table, dibi::TEXT)}
");
$keys = array();
while ($row = $res->fetch(TRUE)) {
$key_name = $row['foreign_key'];
if (!isset($keys[$key_name])) {
$keys[$key_name]['name'] = $row['foreign_key']; // foreign key name
$keys[$key_name]['local'] = array($row['column_name']); // local columns
$keys[$key_name]['table'] = $row['reference_table_name']; // referenced table
$keys[$key_name]['foreign'] = array($row['reference_column_name']); // referenced columns
$keys[$key_name]['onDelete'] = false;
$keys[$key_name]['onUpdate'] = false;
} else {
$keys[$key_name]['local'][] = $row['column_name']; // local columns
$keys[$key_name]['foreign'][] = $row['reference_column_name']; // referenced columns
}
}
return array_values($keys);
}
}
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