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msd2/phpBB3/phpbb/db/tools/mssql.php
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880
msd2/phpBB3/phpbb/db/tools/mssql.php
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<?php
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/**
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*
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* This file is part of the phpBB Forum Software package.
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*
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* @copyright (c) phpBB Limited <https://www.phpbb.com>
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* @license GNU General Public License, version 2 (GPL-2.0)
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*
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* For full copyright and license information, please see
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* the docs/CREDITS.txt file.
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*
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*/
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namespace phpbb\db\tools;
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/**
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* Database Tools for handling cross-db actions such as altering columns, etc.
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* Currently not supported is returning SQL for creating tables.
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*/
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class mssql extends tools
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{
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/**
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* Is the used MS SQL Server a SQL Server 2000?
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* @var bool
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*/
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protected $is_sql_server_2000;
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/**
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* Get the column types for mssql based databases
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*
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* @return array
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*/
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public static function get_dbms_type_map()
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{
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return array(
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'mssql' => array(
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'INT:' => '[int]',
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'BINT' => '[float]',
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'ULINT' => '[int]',
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'UINT' => '[int]',
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'UINT:' => '[int]',
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'TINT:' => '[int]',
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'USINT' => '[int]',
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'BOOL' => '[int]',
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'VCHAR' => '[varchar] (255)',
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'VCHAR:' => '[varchar] (%d)',
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'CHAR:' => '[char] (%d)',
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'XSTEXT' => '[varchar] (1000)',
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'STEXT' => '[varchar] (3000)',
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'TEXT' => '[varchar] (8000)',
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'MTEXT' => '[text]',
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'XSTEXT_UNI'=> '[nvarchar] (100)',
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'STEXT_UNI' => '[nvarchar] (255)',
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'TEXT_UNI' => '[nvarchar] (4000)',
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'MTEXT_UNI' => '[ntext]',
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'TIMESTAMP' => '[int]',
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'DECIMAL' => '[float]',
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'DECIMAL:' => '[float]',
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'PDECIMAL' => '[float]',
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'PDECIMAL:' => '[float]',
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'VCHAR_UNI' => '[nvarchar] (255)',
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'VCHAR_UNI:'=> '[nvarchar] (%d)',
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'VCHAR_CI' => '[nvarchar] (255)',
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'VARBINARY' => '[varchar] (255)',
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),
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'mssqlnative' => array(
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'INT:' => '[int]',
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'BINT' => '[float]',
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'ULINT' => '[int]',
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'UINT' => '[int]',
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'UINT:' => '[int]',
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'TINT:' => '[int]',
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'USINT' => '[int]',
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'BOOL' => '[int]',
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'VCHAR' => '[varchar] (255)',
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'VCHAR:' => '[varchar] (%d)',
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'CHAR:' => '[char] (%d)',
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'XSTEXT' => '[varchar] (1000)',
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'STEXT' => '[varchar] (3000)',
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'TEXT' => '[varchar] (8000)',
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'MTEXT' => '[text]',
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'XSTEXT_UNI'=> '[nvarchar] (100)',
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'STEXT_UNI' => '[nvarchar] (255)',
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'TEXT_UNI' => '[nvarchar] (4000)',
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'MTEXT_UNI' => '[ntext]',
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'TIMESTAMP' => '[int]',
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'DECIMAL' => '[float]',
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'DECIMAL:' => '[float]',
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'PDECIMAL' => '[float]',
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'PDECIMAL:' => '[float]',
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'VCHAR_UNI' => '[nvarchar] (255)',
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'VCHAR_UNI:'=> '[nvarchar] (%d)',
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'VCHAR_CI' => '[nvarchar] (255)',
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'VARBINARY' => '[varchar] (255)',
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),
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);
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}
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/**
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* Constructor. Set DB Object and set {@link $return_statements return_statements}.
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*
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* @param \phpbb\db\driver\driver_interface $db Database connection
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* @param bool $return_statements True if only statements should be returned and no SQL being executed
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*/
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public function __construct(\phpbb\db\driver\driver_interface $db, $return_statements = false)
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{
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parent::__construct($db, $return_statements);
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// Determine mapping database type
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switch ($this->db->get_sql_layer())
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{
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case 'mssql_odbc':
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$this->sql_layer = 'mssql';
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break;
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case 'mssqlnative':
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$this->sql_layer = 'mssqlnative';
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break;
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}
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$this->dbms_type_map = self::get_dbms_type_map();
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}
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/**
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* {@inheritDoc}
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*/
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function sql_list_tables()
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{
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$sql = "SELECT name
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FROM sysobjects
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WHERE type='U'";
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$result = $this->db->sql_query($sql);
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$tables = array();
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while ($row = $this->db->sql_fetchrow($result))
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{
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$name = current($row);
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$tables[$name] = $name;
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}
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$this->db->sql_freeresult($result);
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return $tables;
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}
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/**
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* {@inheritDoc}
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*/
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function sql_create_table($table_name, $table_data)
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{
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// holds the DDL for a column
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$columns = $statements = array();
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if ($this->sql_table_exists($table_name))
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{
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return $this->_sql_run_sql($statements);
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}
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// Begin transaction
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$statements[] = 'begin';
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// Determine if we have created a PRIMARY KEY in the earliest
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$primary_key_gen = false;
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// Determine if the table requires a sequence
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$create_sequence = false;
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// Begin table sql statement
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$table_sql = 'CREATE TABLE [' . $table_name . '] (' . "\n";
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if (!isset($table_data['PRIMARY_KEY']))
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{
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$table_data['COLUMNS']['mssqlindex'] = array('UINT', null, 'auto_increment');
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$table_data['PRIMARY_KEY'] = 'mssqlindex';
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}
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// Iterate through the columns to create a table
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foreach ($table_data['COLUMNS'] as $column_name => $column_data)
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{
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// here lies an array, filled with information compiled on the column's data
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$prepared_column = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
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if (isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'] && strlen($column_name) > 26) // "${column_name}_gen"
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{
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trigger_error("Index name '${column_name}_gen' on table '$table_name' is too long. The maximum auto increment column length is 26 characters.", E_USER_ERROR);
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}
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// here we add the definition of the new column to the list of columns
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$columns[] = "\t [{$column_name}] " . $prepared_column['column_type_sql_default'];
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// see if we have found a primary key set due to a column definition if we have found it, we can stop looking
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if (!$primary_key_gen)
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{
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$primary_key_gen = isset($prepared_column['primary_key_set']) && $prepared_column['primary_key_set'];
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}
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// create sequence DDL based off of the existance of auto incrementing columns
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if (!$create_sequence && isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'])
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{
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$create_sequence = $column_name;
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}
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}
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// this makes up all the columns in the create table statement
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$table_sql .= implode(",\n", $columns);
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// Close the table for two DBMS and add to the statements
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$table_sql .= "\n);";
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$statements[] = $table_sql;
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// we have yet to create a primary key for this table,
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// this means that we can add the one we really wanted instead
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if (!$primary_key_gen)
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{
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// Write primary key
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if (isset($table_data['PRIMARY_KEY']))
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{
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if (!is_array($table_data['PRIMARY_KEY']))
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{
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$table_data['PRIMARY_KEY'] = array($table_data['PRIMARY_KEY']);
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}
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// We need the data here
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$old_return_statements = $this->return_statements;
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$this->return_statements = true;
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$primary_key_stmts = $this->sql_create_primary_key($table_name, $table_data['PRIMARY_KEY']);
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foreach ($primary_key_stmts as $pk_stmt)
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{
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$statements[] = $pk_stmt;
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}
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$this->return_statements = $old_return_statements;
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}
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}
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// Write Keys
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if (isset($table_data['KEYS']))
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{
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foreach ($table_data['KEYS'] as $key_name => $key_data)
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{
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if (!is_array($key_data[1]))
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{
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$key_data[1] = array($key_data[1]);
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}
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$old_return_statements = $this->return_statements;
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$this->return_statements = true;
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$key_stmts = ($key_data[0] == 'UNIQUE') ? $this->sql_create_unique_index($table_name, $key_name, $key_data[1]) : $this->sql_create_index($table_name, $key_name, $key_data[1]);
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foreach ($key_stmts as $key_stmt)
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{
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$statements[] = $key_stmt;
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}
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$this->return_statements = $old_return_statements;
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}
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}
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// Commit Transaction
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$statements[] = 'commit';
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return $this->_sql_run_sql($statements);
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}
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/**
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* {@inheritDoc}
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*/
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function sql_list_columns($table_name)
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{
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$columns = array();
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$sql = "SELECT c.name
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FROM syscolumns c
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LEFT JOIN sysobjects o ON c.id = o.id
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WHERE o.name = '{$table_name}'";
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$result = $this->db->sql_query($sql);
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while ($row = $this->db->sql_fetchrow($result))
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{
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$column = strtolower(current($row));
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$columns[$column] = $column;
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}
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$this->db->sql_freeresult($result);
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return $columns;
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}
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/**
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* {@inheritDoc}
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*/
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function sql_index_exists($table_name, $index_name)
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{
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$sql = "EXEC sp_statistics '$table_name'";
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$result = $this->db->sql_query($sql);
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while ($row = $this->db->sql_fetchrow($result))
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{
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if ($row['TYPE'] == 3)
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{
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if (strtolower($row['INDEX_NAME']) == strtolower($index_name))
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{
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$this->db->sql_freeresult($result);
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return true;
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}
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}
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}
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$this->db->sql_freeresult($result);
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return false;
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||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_unique_index_exists($table_name, $index_name)
|
||||
{
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||||
$sql = "EXEC sp_statistics '$table_name'";
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$result = $this->db->sql_query($sql);
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||||
|
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while ($row = $this->db->sql_fetchrow($result))
|
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{
|
||||
// Usually NON_UNIQUE is the column we want to check, but we allow for both
|
||||
if ($row['TYPE'] == 3)
|
||||
{
|
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if (strtolower($row['INDEX_NAME']) == strtolower($index_name))
|
||||
{
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||||
$this->db->sql_freeresult($result);
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return true;
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||||
}
|
||||
}
|
||||
}
|
||||
$this->db->sql_freeresult($result);
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return false;
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||||
}
|
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|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_prepare_column_data($table_name, $column_name, $column_data)
|
||||
{
|
||||
if (strlen($column_name) > 30)
|
||||
{
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||||
trigger_error("Column name '$column_name' on table '$table_name' is too long. The maximum is 30 characters.", E_USER_ERROR);
|
||||
}
|
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|
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// Get type
|
||||
list($column_type, ) = $this->get_column_type($column_data[0]);
|
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|
||||
// Adjust default value if db-dependent specified
|
||||
if (is_array($column_data[1]))
|
||||
{
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||||
$column_data[1] = (isset($column_data[1][$this->sql_layer])) ? $column_data[1][$this->sql_layer] : $column_data[1]['default'];
|
||||
}
|
||||
|
||||
$sql = '';
|
||||
|
||||
$return_array = array();
|
||||
|
||||
$sql .= " {$column_type} ";
|
||||
$sql_default = " {$column_type} ";
|
||||
|
||||
// For adding columns we need the default definition
|
||||
if (!is_null($column_data[1]))
|
||||
{
|
||||
// For hexadecimal values do not use single quotes
|
||||
if (strpos($column_data[1], '0x') === 0)
|
||||
{
|
||||
$return_array['default'] = 'DEFAULT (' . $column_data[1] . ') ';
|
||||
$sql_default .= $return_array['default'];
|
||||
}
|
||||
else
|
||||
{
|
||||
$return_array['default'] = 'DEFAULT (' . ((is_numeric($column_data[1])) ? $column_data[1] : "'{$column_data[1]}'") . ') ';
|
||||
$sql_default .= $return_array['default'];
|
||||
}
|
||||
}
|
||||
|
||||
if (isset($column_data[2]) && $column_data[2] == 'auto_increment')
|
||||
{
|
||||
// $sql .= 'IDENTITY (1, 1) ';
|
||||
$sql_default .= 'IDENTITY (1, 1) ';
|
||||
}
|
||||
|
||||
$return_array['textimage'] = $column_type === '[text]';
|
||||
|
||||
if (!is_null($column_data[1]) || (isset($column_data[2]) && $column_data[2] == 'auto_increment'))
|
||||
{
|
||||
$sql .= 'NOT NULL';
|
||||
$sql_default .= 'NOT NULL';
|
||||
}
|
||||
else
|
||||
{
|
||||
$sql .= 'NULL';
|
||||
$sql_default .= 'NULL';
|
||||
}
|
||||
|
||||
$return_array['column_type_sql_default'] = $sql_default;
|
||||
|
||||
$return_array['column_type_sql'] = $sql;
|
||||
|
||||
return $return_array;
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_column_add($table_name, $column_name, $column_data, $inline = false)
|
||||
{
|
||||
$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
|
||||
$statements = array();
|
||||
|
||||
// Does not support AFTER, only through temporary table
|
||||
$statements[] = 'ALTER TABLE [' . $table_name . '] ADD [' . $column_name . '] ' . $column_data['column_type_sql_default'];
|
||||
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_column_remove($table_name, $column_name, $inline = false)
|
||||
{
|
||||
$statements = array();
|
||||
|
||||
// We need the data here
|
||||
$old_return_statements = $this->return_statements;
|
||||
$this->return_statements = true;
|
||||
|
||||
$indexes = $this->get_existing_indexes($table_name, $column_name);
|
||||
$indexes = array_merge($indexes, $this->get_existing_indexes($table_name, $column_name, true));
|
||||
|
||||
// Drop any indexes
|
||||
$recreate_indexes = array();
|
||||
if (!empty($indexes))
|
||||
{
|
||||
foreach ($indexes as $index_name => $index_data)
|
||||
{
|
||||
$result = $this->sql_index_drop($table_name, $index_name);
|
||||
$statements = array_merge($statements, $result);
|
||||
if (count($index_data) > 1)
|
||||
{
|
||||
// Remove this column from the index and recreate it
|
||||
$recreate_indexes[$index_name] = array_diff($index_data, array($column_name));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Drop primary keys depending on this column
|
||||
$result = $this->mssql_get_drop_default_primary_key_queries($table_name, $column_name);
|
||||
$statements = array_merge($statements, $result);
|
||||
|
||||
// Drop default value constraint
|
||||
$result = $this->mssql_get_drop_default_constraints_queries($table_name, $column_name);
|
||||
$statements = array_merge($statements, $result);
|
||||
|
||||
// Remove the column
|
||||
$statements[] = 'ALTER TABLE [' . $table_name . '] DROP COLUMN [' . $column_name . ']';
|
||||
|
||||
if (!empty($recreate_indexes))
|
||||
{
|
||||
// Recreate indexes after we removed the column
|
||||
foreach ($recreate_indexes as $index_name => $index_data)
|
||||
{
|
||||
$result = $this->sql_create_index($table_name, $index_name, $index_data);
|
||||
$statements = array_merge($statements, $result);
|
||||
}
|
||||
}
|
||||
|
||||
$this->return_statements = $old_return_statements;
|
||||
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_index_drop($table_name, $index_name)
|
||||
{
|
||||
$statements = array();
|
||||
|
||||
$statements[] = 'DROP INDEX [' . $table_name . '].[' . $index_name . ']';
|
||||
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_table_drop($table_name)
|
||||
{
|
||||
$statements = array();
|
||||
|
||||
if (!$this->sql_table_exists($table_name))
|
||||
{
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
// the most basic operation, get rid of the table
|
||||
$statements[] = 'DROP TABLE ' . $table_name;
|
||||
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_create_primary_key($table_name, $column, $inline = false)
|
||||
{
|
||||
$statements = array();
|
||||
|
||||
$sql = "ALTER TABLE [{$table_name}] WITH NOCHECK ADD ";
|
||||
$sql .= "CONSTRAINT [PK_{$table_name}] PRIMARY KEY CLUSTERED (";
|
||||
$sql .= '[' . implode("],\n\t\t[", $column) . ']';
|
||||
$sql .= ')';
|
||||
|
||||
$statements[] = $sql;
|
||||
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_create_unique_index($table_name, $index_name, $column)
|
||||
{
|
||||
$statements = array();
|
||||
|
||||
if ($this->mssql_is_sql_server_2000())
|
||||
{
|
||||
$this->check_index_name_length($table_name, $index_name);
|
||||
}
|
||||
|
||||
$statements[] = 'CREATE UNIQUE INDEX [' . $index_name . '] ON [' . $table_name . ']([' . implode('], [', $column) . '])';
|
||||
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_create_index($table_name, $index_name, $column)
|
||||
{
|
||||
$statements = array();
|
||||
|
||||
$this->check_index_name_length($table_name, $index_name);
|
||||
|
||||
// remove index length
|
||||
$column = preg_replace('#:.*$#', '', $column);
|
||||
|
||||
$statements[] = 'CREATE INDEX [' . $index_name . '] ON [' . $table_name . ']([' . implode('], [', $column) . '])';
|
||||
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritdoc}
|
||||
*/
|
||||
protected function get_max_index_name_length()
|
||||
{
|
||||
if ($this->mssql_is_sql_server_2000())
|
||||
{
|
||||
return parent::get_max_index_name_length();
|
||||
}
|
||||
else
|
||||
{
|
||||
return 128;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_list_index($table_name)
|
||||
{
|
||||
$index_array = array();
|
||||
$sql = "EXEC sp_statistics '$table_name'";
|
||||
$result = $this->db->sql_query($sql);
|
||||
while ($row = $this->db->sql_fetchrow($result))
|
||||
{
|
||||
if ($row['TYPE'] == 3)
|
||||
{
|
||||
$index_array[] = strtolower($row['INDEX_NAME']);
|
||||
}
|
||||
}
|
||||
$this->db->sql_freeresult($result);
|
||||
|
||||
return $index_array;
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
*/
|
||||
function sql_column_change($table_name, $column_name, $column_data, $inline = false)
|
||||
{
|
||||
$column_data = $this->sql_prepare_column_data($table_name, $column_name, $column_data);
|
||||
$statements = array();
|
||||
|
||||
// We need the data here
|
||||
$old_return_statements = $this->return_statements;
|
||||
$this->return_statements = true;
|
||||
|
||||
$indexes = $this->get_existing_indexes($table_name, $column_name);
|
||||
$unique_indexes = $this->get_existing_indexes($table_name, $column_name, true);
|
||||
|
||||
// Drop any indexes
|
||||
if (!empty($indexes) || !empty($unique_indexes))
|
||||
{
|
||||
$drop_indexes = array_merge(array_keys($indexes), array_keys($unique_indexes));
|
||||
foreach ($drop_indexes as $index_name)
|
||||
{
|
||||
$result = $this->sql_index_drop($table_name, $index_name);
|
||||
$statements = array_merge($statements, $result);
|
||||
}
|
||||
}
|
||||
|
||||
// Drop default value constraint
|
||||
$result = $this->mssql_get_drop_default_constraints_queries($table_name, $column_name);
|
||||
$statements = array_merge($statements, $result);
|
||||
|
||||
// Change the column
|
||||
$statements[] = 'ALTER TABLE [' . $table_name . '] ALTER COLUMN [' . $column_name . '] ' . $column_data['column_type_sql'];
|
||||
|
||||
if (!empty($column_data['default']) && !$this->mssql_is_column_identity($table_name, $column_name))
|
||||
{
|
||||
// Add new default value constraint
|
||||
$statements[] = 'ALTER TABLE [' . $table_name . '] ADD CONSTRAINT [DF_' . $table_name . '_' . $column_name . '_1] ' . $column_data['default'] . ' FOR [' . $column_name . ']';
|
||||
}
|
||||
|
||||
if (!empty($indexes))
|
||||
{
|
||||
// Recreate indexes after we changed the column
|
||||
foreach ($indexes as $index_name => $index_data)
|
||||
{
|
||||
$result = $this->sql_create_index($table_name, $index_name, $index_data);
|
||||
$statements = array_merge($statements, $result);
|
||||
}
|
||||
}
|
||||
|
||||
if (!empty($unique_indexes))
|
||||
{
|
||||
// Recreate unique indexes after we changed the column
|
||||
foreach ($unique_indexes as $index_name => $index_data)
|
||||
{
|
||||
$result = $this->sql_create_unique_index($table_name, $index_name, $index_data);
|
||||
$statements = array_merge($statements, $result);
|
||||
}
|
||||
}
|
||||
|
||||
$this->return_statements = $old_return_statements;
|
||||
|
||||
return $this->_sql_run_sql($statements);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get queries to drop the default constraints of a column
|
||||
*
|
||||
* We need to drop the default constraints of a column,
|
||||
* before being able to change their type or deleting them.
|
||||
*
|
||||
* @param string $table_name
|
||||
* @param string $column_name
|
||||
* @return array Array with SQL statements
|
||||
*/
|
||||
protected function mssql_get_drop_default_constraints_queries($table_name, $column_name)
|
||||
{
|
||||
$statements = array();
|
||||
if ($this->mssql_is_sql_server_2000())
|
||||
{
|
||||
// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
|
||||
// Deprecated in SQL Server 2005
|
||||
$sql = "SELECT so.name AS def_name
|
||||
FROM sysobjects so
|
||||
JOIN sysconstraints sc ON so.id = sc.constid
|
||||
WHERE object_name(so.parent_obj) = '{$table_name}'
|
||||
AND so.xtype = 'D'
|
||||
AND sc.colid = (SELECT colid FROM syscolumns
|
||||
WHERE id = object_id('{$table_name}')
|
||||
AND name = '{$column_name}')";
|
||||
}
|
||||
else
|
||||
{
|
||||
$sql = "SELECT dobj.name AS def_name
|
||||
FROM sys.columns col
|
||||
LEFT OUTER JOIN sys.objects dobj ON (dobj.object_id = col.default_object_id AND dobj.type = 'D')
|
||||
WHERE col.object_id = object_id('{$table_name}')
|
||||
AND col.name = '{$column_name}'
|
||||
AND dobj.name IS NOT NULL";
|
||||
}
|
||||
|
||||
$result = $this->db->sql_query($sql);
|
||||
while ($row = $this->db->sql_fetchrow($result))
|
||||
{
|
||||
$statements[] = 'ALTER TABLE [' . $table_name . '] DROP CONSTRAINT [' . $row['def_name'] . ']';
|
||||
}
|
||||
$this->db->sql_freeresult($result);
|
||||
|
||||
return $statements;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get queries to drop the primary keys depending on the specified column
|
||||
*
|
||||
* We need to drop primary keys depending on this column before being able
|
||||
* to delete them.
|
||||
*
|
||||
* @param string $table_name
|
||||
* @param string $column_name
|
||||
* @return array Array with SQL statements
|
||||
*/
|
||||
protected function mssql_get_drop_default_primary_key_queries($table_name, $column_name)
|
||||
{
|
||||
$statements = array();
|
||||
|
||||
$sql = "SELECT ccu.CONSTRAINT_NAME, ccu.COLUMN_NAME
|
||||
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
|
||||
JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE ccu ON tc.CONSTRAINT_NAME = ccu.Constraint_name
|
||||
WHERE tc.TABLE_NAME = '{$table_name}'
|
||||
AND tc.CONSTRAINT_TYPE = 'Primary Key'
|
||||
AND ccu.COLUMN_NAME = '{$column_name}'";
|
||||
|
||||
$result = $this->db->sql_query($sql);
|
||||
|
||||
while ($primary_key = $this->db->sql_fetchrow($result))
|
||||
{
|
||||
$statements[] = 'ALTER TABLE [' . $table_name . '] DROP CONSTRAINT [' . $primary_key['CONSTRAINT_NAME'] . ']';
|
||||
}
|
||||
$this->db->sql_freeresult($result);
|
||||
|
||||
return $statements;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks to see if column is an identity column
|
||||
*
|
||||
* Identity columns cannot have defaults set for them.
|
||||
*
|
||||
* @param string $table_name
|
||||
* @param string $column_name
|
||||
* @return bool true if identity, false if not
|
||||
*/
|
||||
protected function mssql_is_column_identity($table_name, $column_name)
|
||||
{
|
||||
if ($this->mssql_is_sql_server_2000())
|
||||
{
|
||||
// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
|
||||
// Deprecated in SQL Server 2005
|
||||
$sql = "SELECT COLUMNPROPERTY(object_id('{$table_name}'), '{$column_name}', 'IsIdentity') AS is_identity";
|
||||
}
|
||||
else
|
||||
{
|
||||
$sql = "SELECT is_identity FROM sys.columns
|
||||
WHERE object_id = object_id('{$table_name}')
|
||||
AND name = '{$column_name}'";
|
||||
}
|
||||
|
||||
$result = $this->db->sql_query($sql);
|
||||
$is_identity = $this->db->sql_fetchfield('is_identity');
|
||||
$this->db->sql_freeresult($result);
|
||||
|
||||
return (bool) $is_identity;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get a list with existing indexes for the column
|
||||
*
|
||||
* @param string $table_name
|
||||
* @param string $column_name
|
||||
* @param bool $unique Should we get unique indexes or normal ones
|
||||
* @return array Array with Index name => columns
|
||||
*/
|
||||
public function get_existing_indexes($table_name, $column_name, $unique = false)
|
||||
{
|
||||
$existing_indexes = array();
|
||||
if ($this->mssql_is_sql_server_2000())
|
||||
{
|
||||
// http://msdn.microsoft.com/en-us/library/aa175912%28v=sql.80%29.aspx
|
||||
// Deprecated in SQL Server 2005
|
||||
$sql = "SELECT DISTINCT ix.name AS phpbb_index_name
|
||||
FROM sysindexes ix
|
||||
INNER JOIN sysindexkeys ixc
|
||||
ON ixc.id = ix.id
|
||||
AND ixc.indid = ix.indid
|
||||
INNER JOIN syscolumns cols
|
||||
ON cols.colid = ixc.colid
|
||||
AND cols.id = ix.id
|
||||
WHERE ix.id = object_id('{$table_name}')
|
||||
AND cols.name = '{$column_name}'
|
||||
AND INDEXPROPERTY(ix.id, ix.name, 'IsUnique') = " . ($unique ? '1' : '0');
|
||||
}
|
||||
else
|
||||
{
|
||||
$sql = "SELECT DISTINCT ix.name AS phpbb_index_name
|
||||
FROM sys.indexes ix
|
||||
INNER JOIN sys.index_columns ixc
|
||||
ON ixc.object_id = ix.object_id
|
||||
AND ixc.index_id = ix.index_id
|
||||
INNER JOIN sys.columns cols
|
||||
ON cols.column_id = ixc.column_id
|
||||
AND cols.object_id = ix.object_id
|
||||
WHERE ix.object_id = object_id('{$table_name}')
|
||||
AND cols.name = '{$column_name}'
|
||||
AND ix.is_primary_key = 0
|
||||
AND ix.is_unique = " . ($unique ? '1' : '0');
|
||||
}
|
||||
|
||||
$result = $this->db->sql_query($sql);
|
||||
while ($row = $this->db->sql_fetchrow($result))
|
||||
{
|
||||
if (!isset($row['is_unique']) || ($unique && $row['is_unique'] == 'UNIQUE') || (!$unique && $row['is_unique'] == 'NONUNIQUE'))
|
||||
{
|
||||
$existing_indexes[$row['phpbb_index_name']] = array();
|
||||
}
|
||||
}
|
||||
$this->db->sql_freeresult($result);
|
||||
|
||||
if (empty($existing_indexes))
|
||||
{
|
||||
return array();
|
||||
}
|
||||
|
||||
if ($this->mssql_is_sql_server_2000())
|
||||
{
|
||||
$sql = "SELECT DISTINCT ix.name AS phpbb_index_name, cols.name AS phpbb_column_name
|
||||
FROM sysindexes ix
|
||||
INNER JOIN sysindexkeys ixc
|
||||
ON ixc.id = ix.id
|
||||
AND ixc.indid = ix.indid
|
||||
INNER JOIN syscolumns cols
|
||||
ON cols.colid = ixc.colid
|
||||
AND cols.id = ix.id
|
||||
WHERE ix.id = object_id('{$table_name}')
|
||||
AND " . $this->db->sql_in_set('ix.name', array_keys($existing_indexes));
|
||||
}
|
||||
else
|
||||
{
|
||||
$sql = "SELECT DISTINCT ix.name AS phpbb_index_name, cols.name AS phpbb_column_name
|
||||
FROM sys.indexes ix
|
||||
INNER JOIN sys.index_columns ixc
|
||||
ON ixc.object_id = ix.object_id
|
||||
AND ixc.index_id = ix.index_id
|
||||
INNER JOIN sys.columns cols
|
||||
ON cols.column_id = ixc.column_id
|
||||
AND cols.object_id = ix.object_id
|
||||
WHERE ix.object_id = object_id('{$table_name}')
|
||||
AND " . $this->db->sql_in_set('ix.name', array_keys($existing_indexes));
|
||||
}
|
||||
|
||||
$result = $this->db->sql_query($sql);
|
||||
while ($row = $this->db->sql_fetchrow($result))
|
||||
{
|
||||
$existing_indexes[$row['phpbb_index_name']][] = $row['phpbb_column_name'];
|
||||
}
|
||||
$this->db->sql_freeresult($result);
|
||||
|
||||
return $existing_indexes;
|
||||
}
|
||||
|
||||
/**
|
||||
* Is the used MS SQL Server a SQL Server 2000?
|
||||
*
|
||||
* @return bool
|
||||
*/
|
||||
protected function mssql_is_sql_server_2000()
|
||||
{
|
||||
if ($this->is_sql_server_2000 === null)
|
||||
{
|
||||
$sql = "SELECT CAST(SERVERPROPERTY('productversion') AS VARCHAR(25)) AS mssql_version";
|
||||
$result = $this->db->sql_query($sql);
|
||||
$properties = $this->db->sql_fetchrow($result);
|
||||
$this->db->sql_freeresult($result);
|
||||
$this->is_sql_server_2000 = $properties['mssql_version'][0] == '8';
|
||||
}
|
||||
|
||||
return $this->is_sql_server_2000;
|
||||
}
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user