Your IP : 216.73.216.108
<?php
# ***** BEGIN LICENSE BLOCK *****
# This file is part of Clearbricks.
# Copyright (c) 2007 Olivier Meunier and contributors. All rights
# reserved.
#
# Clearbricks is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Clearbricks is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Clearbricks; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# ***** END LICENSE BLOCK *****
class sqliteSchema extends dbSchema implements i_dbSchema
{
private $table_hist = array();
private $table_stack = array();
private $x_stack = array();
public function dbt2udt($type,&$len,&$default)
{
$type = parent::dbt2udt($type,$len,$default);
return $type;
}
public function udt2dbt($type,&$len,&$default)
{
$type = parent::udt2dbt($type,$len,$default);
switch ($type)
{
case 'smallint':
case 'bigint':
return 'integer';
case 'real':
return 'float';
case 'date':
case 'time':
return 'timestamp';
case 'timestamp':
if ($default == 'now()') {
# SQLite does not support now() default value...
$default = "'1970-01-01 00:00:00'";
}
return $type;
}
return $type;
}
public function flushStack()
{
# Vilain hack of #@! SQLite that doesn't support
# ALTER ... ADD CONSTRAINT on tables
foreach ($this->table_stack as $table => $def)
{
$sql = 'CREATE TABLE '.$table." (\n".implode(",\n",$def)."\n)\n ";
$this->con->execute($sql);
}
foreach ($this->x_stack as $x)
{
$this->con->execute($x);
}
}
public function db_get_tables()
{
$res = array();
$sql = "
Select * from
( select 'main' as TABLE_CATALOG , 'sqlite' as TABLE_SCHEMA ,
tbl_name as TABLE_NAME , case when type = 'table'
then 'BASE TABLE' when type = 'view' then 'VIEW'
end as TABLE_TYPE, sql as TABLE_SOURCE from sqlite_master
where type in('table','view')
and tbl_name not like 'INFORMATION_SCHEMA_%'
union select 'main' as TABLE_CATALOG , 'sqlite' as TABLE_SCHEMA,
tbl_name as TABLE_NAME , case when type = 'table'
then 'TEMPORARY TABLE' when type = 'view'
then 'TEMPORARY VIEW' end as TABLE_TYPE, sql as
TABLE_SOURCE from sqlite_temp_master where type in('table','view')
and tbl_name not like 'INFORMATION_SCHEMA_%' )
BT order by TABLE_TYPE , TABLE_NAME
";
$rs = $this->con->select($sql);
$res = array();
while ($rs->fetch()) {
$res[] = $rs->TABLE_NAME;
}
return $res;
}
public function db_get_columns($table)
{
# We may need to do it one day
return array();
}
public function db_get_keys($table)
{
# Don't need this with SQLite
return array();
}
public function db_get_indexes($table)
{
# Don't need this with SQLite
return array();
}
public function db_get_references($table)
{
# Don't need this with SQLite
return array();
}
public function db_create_table($name,$fields)
{
$a = array();
foreach ($fields as $n => $f)
{
$type = $f['type'];
$len = (integer) $f['len'];
$default = $f['default'];
$null = $f['null'];
$type = $this->udt2dbt($type,$len,$default);
$len = $len > 0 ? '('.$len.')' : '';
$null = $null ? 'NULL' : 'NOT NULL';
if ($default === null) {
$default = 'DEFAULT NULL';
} elseif ($default !== false) {
$default = 'DEFAULT '.$default.' ';
} else {
$default = '';
}
$a[] = $n.' '.$type.$len.' '.$null.' '.$default;
}
$this->table_stack[$name][] = implode(",\n",$a);
$this->table_hist[$name] = $fields;
}
public function db_create_field($table,$name,$type,$len,$null,$default)
{
# Don't need this with SQLite
}
public function db_create_primary($table,$name,$cols)
{
$this->table_stack[$table][] = 'CONSTRAINT '.$name.' PRIMARY KEY ('.implode(',',$cols).') ';
}
public function db_create_unique($table,$name,$cols)
{
$this->table_stack[$table][] = 'CONSTRAINT '.$name.' UNIQUE ('.implode(',',$cols).') ';
}
public function db_create_index($table,$name,$type,$cols)
{
$this->x_stack[] = 'CREATE INDEX '.$name.' ON '.$table.' ('.implode(',',$cols).') ';
}
public function db_create_reference($name,$c_table,$c_cols,$p_table,$p_cols,$update,$delete)
{
if (!isset($this->table_hist[$c_table])) {
return;
}
if (count($c_cols) > 1 || count($p_cols) > 1) {
throw new Exception('SQLite UDBS does not support multiple columns foreign keys');
}
$c_col = $c_cols[0];
$p_col = $p_cols[0];
$update = strtolower($update);
$delete = strtolower($delete);
$cnull = $this->table_hist[$c_table][$c_col]['null'];
# Create constraint
$this->x_stack[] =
'CREATE TRIGGER bir_'.$name."\n".
'BEFORE INSERT ON '.$c_table."\n".
"FOR EACH ROW BEGIN\n".
' SELECT RAISE(ROLLBACK,\'insert on table "'.$c_table.'" violates foreign key constraint "'.$name.'"\')'."\n".
' WHERE '.
($cnull ? 'NEW.'.$c_col." IS NOT NULL\n AND " : '').
'(SELECT '.$p_col.' FROM '.$p_table.' WHERE '.$p_col.' = NEW.'.$c_col.") IS NULL;\n".
"END;\n";
# Update constraint
$this->x_stack[] =
'CREATE TRIGGER bur_'.$name."\n".
'BEFORE UPDATE ON '.$c_table."\n".
"FOR EACH ROW BEGIN\n".
' SELECT RAISE(ROLLBACK,\'update on table "'.$c_table.'" violates foreign key constraint "'.$name.'"\')'."\n".
' WHERE '.
($cnull ? 'NEW.'.$c_col." IS NOT NULL\n AND " : '').
'(SELECT '.$p_col.' FROM '.$p_table.' WHERE '.$p_col.' = NEW.'.$c_col.") IS NULL;\n".
"END;\n";
# ON UPDATE
if ($update == 'cascade')
{
$this->x_stack[] =
'CREATE TRIGGER aur_'.$name."\n".
'AFTER UPDATE ON '.$p_table."\n".
"FOR EACH ROW BEGIN\n".
' UPDATE '.$c_table.' SET '.$c_col.' = NEW.'.$p_col.' WHERE '.$c_col.' = OLD.'.$p_col.";\n".
"END;\n";
}
elseif ($update == 'set null')
{
$this->x_stack[] =
'CREATE TRIGGER aur_'.$name."\n".
'AFTER UPDATE ON '.$p_table."\n".
"FOR EACH ROW BEGIN\n".
' UPDATE '.$c_table.' SET '.$c_col.' = NULL WHERE '.$c_col.' = OLD.'.$p_col.";\n".
"END;\n";
}
else # default on restrict
{
$this->x_stack[] =
'CREATE TRIGGER bur_'.$name."\n".
'BEFORE UPDATE ON '.$p_table."\n".
"FOR EACH ROW BEGIN\n".
' SELECT RAISE (ROLLBACK,\'update on table "'.$p_table.'" violates foreign key constraint "'.$name.'"\')'."\n".
' WHERE (SELECT '.$c_col.' FROM '.$c_table.' WHERE '.$c_col.' = OLD.'.$p_col.") IS NOT NULL;\n".
"END;\n";
}
# ON DELETE
if ($delete == 'cascade')
{
$this->x_stack[] =
'CREATE TRIGGER bdr_'.$name."\n".
'BEFORE DELETE ON '.$p_table."\n".
"FOR EACH ROW BEGIN\n".
' DELETE FROM '.$c_table.' WHERE '.$c_col.' = OLD.'.$p_col.";\n".
"END;\n";
}
elseif ($delete == 'set null')
{
$this->x_stack[] =
'CREATE TRIGGER bdr_'.$name."\n".
'BEFORE DELETE ON '.$p_table."\n".
"FOR EACH ROW BEGIN\n".
' UPDATE '.$c_table.' SET '.$c_col .' = NULL WHERE '.$c_col.' = OLD.'.$p_col.";\n".
"END;\n";
}
else
{
$this->x_stack[] =
'CREATE TRIGGER bdr_'.$name."\n".
'BEFORE DELETE ON '.$p_table."\n".
"FOR EACH ROW BEGIN\n".
' SELECT RAISE (ROLLBACK,\'delete on table "'.$p_table.'" violates foreign key constraint "'.$name.'"\')'."\n".
' WHERE (SELECT '.$c_col.' FROM '.$c_table.' WHERE '.$c_col.' = OLD.'.$p_col.") IS NOT NULL;\n".
"END;\n";
}
}
public function db_alter_field($table,$name,$type,$len,$null,$default)
{
# Don't need this with SQLite
}
public function db_alter_primary($table,$name,$newname,$cols)
{
# Don't need this with SQLite
}
public function db_alter_unique($table,$name,$newname,$cols)
{
# Don't need this with SQLite
}
public function db_alter_index($table,$name,$newname,$type,$cols)
{
# Don't need this with SQLite
}
public function db_alter_reference($name,$newname,$c_table,$c_cols,$p_table,$p_cols,$update,$delete)
{
# Don't need this with SQLite
}
}
?>