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sqlite.php
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<?php
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith, Lorenzo Alberton |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// | POSSIBILITY OF SUCH DAMAGE. |
// +----------------------------------------------------------------------+
// | Authors: Lukas Smith <smith@pooteeweet.org> |
// | Lorenzo Alberton <l.alberton@quipo.it> |
// +----------------------------------------------------------------------+
//
// $Id: sqlite.php,v 1.74 2008/03/05 11:08:53 quipo Exp $
//
require_once 'MDB2/Driver/Manager/Common.php';
/**
* MDB2 SQLite driver for the management modules
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
* @author Lorenzo Alberton <l.alberton@quipo.it>
*/
class MDB2_Driver_Manager_sqlite extends MDB2_Driver_Manager_Common
{
// {{{ createDatabase()
/**
* create a new database
*
* @param string $name name of the database that should be created
* @param array $options array with charset info
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createDatabase($name, $options = array())
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$database_file = $db->_getDatabaseFile($name);
if (file_exists($database_file)) {
return $db->raiseError(MDB2_ERROR_ALREADY_EXISTS, null, null,
'database already exists', __FUNCTION__);
}
$php_errormsg = '';
$handle = @sqlite_open($database_file, $db->dsn['mode'], $php_errormsg);
if (!$handle) {
return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
(isset($php_errormsg) ? $php_errormsg : 'could not create the database file'), __FUNCTION__);
}
if (!empty($options['charset'])) {
$query = 'PRAGMA encoding = ' . $db->quote($options['charset'], 'text');
@sqlite_query($query, $handle);
}
@sqlite_close($handle);
return MDB2_OK;
}
// }}}
// {{{ dropDatabase()
/**
* drop an existing database
*
* @param string $name name of the database that should be dropped
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function dropDatabase($name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$database_file = $db->_getDatabaseFile($name);
if (!@file_exists($database_file)) {
return $db->raiseError(MDB2_ERROR_CANNOT_DROP, null, null,
'database does not exist', __FUNCTION__);
}
$result = @unlink($database_file);
if (!$result) {
return $db->raiseError(MDB2_ERROR_CANNOT_DROP, null, null,
(isset($php_errormsg) ? $php_errormsg : 'could not remove the database file'), __FUNCTION__);
}
return MDB2_OK;
}
// }}}
// {{{ _getAdvancedFKOptions()
/**
* Return the FOREIGN KEY query section dealing with non-standard options
* as MATCH, INITIALLY DEFERRED, ON UPDATE, ...
*
* @param array $definition
* @return string
* @access protected
*/
function _getAdvancedFKOptions($definition)
{
$query = '';
if (!empty($definition['match'])) {
$query .= ' MATCH '.$definition['match'];
}
if (!empty($definition['onupdate']) && (strtoupper($definition['onupdate']) != 'NO ACTION')) {
$query .= ' ON UPDATE '.$definition['onupdate'];
}
if (!empty($definition['ondelete']) && (strtoupper($definition['ondelete']) != 'NO ACTION')) {
$query .= ' ON DELETE '.$definition['ondelete'];
}
if (!empty($definition['deferrable'])) {
$query .= ' DEFERRABLE';
} else {
$query .= ' NOT DEFERRABLE';
}
if (!empty($definition['initiallydeferred'])) {
$query .= ' INITIALLY DEFERRED';
} else {
$query .= ' INITIALLY IMMEDIATE';
}
return $query;
}
// }}}
// {{{ _getCreateTableQuery()
/**
* Create a basic SQL query for a new table creation
* @param string $name Name of the database that should be created
* @param array $fields Associative array that contains the definition of each field of the new table
* @param array $options An associative array of table options
* @return mixed string (the SQL query) on success, a MDB2 error on failure
* @see createTable()
*/
function _getCreateTableQuery($name, $fields, $options = array())
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
if (!$name) {
return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
'no valid table name specified', __FUNCTION__);
}
if (empty($fields)) {
return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
'no fields specified for table "'.$name.'"', __FUNCTION__);
}
$query_fields = $this->getFieldDeclarationList($fields);
if (PEAR::isError($query_fields)) {
return $query_fields;
}
if (!empty($options['primary'])) {
$query_fields.= ', PRIMARY KEY ('.implode(', ', array_keys($options['primary'])).')';
}
if (!empty($options['foreign_keys'])) {
foreach ($options['foreign_keys'] as $fkname => $fkdef) {
if (empty($fkdef)) {
continue;
}
$query_fields.= ', CONSTRAINT '.$fkname.' FOREIGN KEY ('.implode(', ', array_keys($fkdef['fields'])).')';
$query_fields.= ' REFERENCES '.$fkdef['references']['table'].' ('.implode(', ', array_keys($fkdef['references']['fields'])).')';
$query_fields.= $this->_getAdvancedFKOptions($fkdef);
}
}
$name = $db->quoteIdentifier($name, true);
$result = 'CREATE ';
if (!empty($options['temporary'])) {
$result .= $this->_getTemporaryTableQuery();
}
$result .= " TABLE $name ($query_fields)";
return $result;
}
// }}}
// {{{ createTable()
/**
* create a new table
*
* @param string $name Name of the database that should be created
* @param array $fields Associative array that contains the definition of each field of the new table
* @param array $options An associative array of table options
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createTable($name, $fields, $options = array())
{
$result = parent::createTable($name, $fields, $options);
if (PEAR::isError($result)) {
return $result;
}
// create triggers to enforce FOREIGN KEY constraints
if (!empty($options['foreign_keys'])) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
foreach ($options['foreign_keys'] as $fkname => $fkdef) {
if (empty($fkdef)) {
continue;
}
//set actions to 'RESTRICT' if not set
$fkdef['onupdate'] = empty($fkdef['onupdate']) ? 'RESTRICT' : strtoupper($fkdef['onupdate']);
$fkdef['ondelete'] = empty($fkdef['ondelete']) ? 'RESTRICT' : strtoupper($fkdef['ondelete']);
$trigger_names = array(
'insert' => $fkname.'_insert_trg',
'update' => $fkname.'_update_trg',
'pk_update' => $fkname.'_pk_update_trg',
'pk_delete' => $fkname.'_pk_delete_trg',
);
//create the [insert|update] triggers on the FK table
$table_fields = array_keys($fkdef['fields']);
$referenced_fields = array_keys($fkdef['references']['fields']);
$query = 'CREATE TRIGGER %s BEFORE %s ON '.$name
.' FOR EACH ROW BEGIN'
.' SELECT RAISE(ROLLBACK, \'%s on table "'.$name.'" violates FOREIGN KEY constraint "'.$fkname.'"\')'
.' WHERE (SELECT ';
$aliased_fields = array();
foreach ($referenced_fields as $field) {
$aliased_fields[] = $fkdef['references']['table'] .'.'.$field .' AS '.$field;
}
$query .= implode(',', $aliased_fields)
.' FROM '.$fkdef['references']['table']
.' WHERE ';
$conditions = array();
for ($i=0; $i<count($table_fields); $i++) {
$conditions[] = $referenced_fields[$i] .' = NEW.'.$table_fields[$i];
}
$query .= implode(' AND ', $conditions).') IS NULL; END;';
$result = $db->exec(sprintf($query, $trigger_names['insert'], 'INSERT', 'insert'));
if (PEAR::isError($result)) {
return $result;
}
$result = $db->exec(sprintf($query, $trigger_names['update'], 'UPDATE', 'update'));
if (PEAR::isError($result)) {
return $result;
}
//create the ON [UPDATE|DELETE] triggers on the primary table
$restrict_action = 'SELECT RAISE(ROLLBACK, \'%s on table "'.$name.'" violates FOREIGN KEY constraint "'.$fkname.'"\')'
.' WHERE (SELECT ';
$aliased_fields = array();
foreach ($table_fields as $field) {
$aliased_fields[] = $name .'.'.$field .' AS '.$field;
}
$restrict_action .= implode(',', $aliased_fields)
.' FROM '.$name
.' WHERE ';
$conditions = array();
$new_values = array();
$null_values = array();
for ($i=0; $i<count($table_fields); $i++) {
$conditions[] = $table_fields[$i] .' = OLD.'.$referenced_fields[$i];
$new_values[] = $table_fields[$i] .' = NEW.'.$referenced_fields[$i];
$null_values[] = $table_fields[$i] .' = NULL';
}
$restrict_action .= implode(' AND ', $conditions).') IS NOT NULL';
$cascade_action_update = 'UPDATE '.$name.' SET '.implode(', ', $new_values) .' WHERE '.implode(' AND ', $conditions);
$cascade_action_delete = 'DELETE FROM '.$name.' WHERE '.implode(' AND ', $conditions);
$setnull_action = 'UPDATE '.$name.' SET '.implode(', ', $null_values).' WHERE '.implode(' AND ', $conditions);
if ('SET DEFAULT' == $fkdef['onupdate'] || 'SET DEFAULT' == $fkdef['ondelete']) {
$db->loadModule('Reverse', null, true);
$default_values = array();
foreach ($table_fields as $table_field) {
$field_definition = $db->reverse->getTableFieldDefinition($name, $field);
if (PEAR::isError($field_definition)) {
return $field_definition;
}
$default_values[] = $table_field .' = '. $field_definition[0]['default'];
}
$setdefault_action = 'UPDATE '.$name.' SET '.implode(', ', $default_values).' WHERE '.implode(' AND ', $conditions);
}
$query = 'CREATE TRIGGER %s'
.' %s ON '.$fkdef['references']['table']
.' FOR EACH ROW BEGIN ';
if ('CASCADE' == $fkdef['onupdate']) {
$sql_update = sprintf($query, $trigger_names['pk_update'], 'AFTER UPDATE', 'update') . $cascade_action_update. '; END;';
} elseif ('SET NULL' == $fkdef['onupdate']) {
$sql_update = sprintf($query, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update') . $setnull_action. '; END;';
} elseif ('SET DEFAULT' == $fkdef['onupdate']) {
$sql_update = sprintf($query, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update') . $setdefault_action. '; END;';
} elseif ('NO ACTION' == $fkdef['onupdate']) {
$sql_update = sprintf($query.$restrict_action, $trigger_names['pk_update'], 'AFTER UPDATE', 'update') . '; END;';
} else {
//'RESTRICT'
$sql_update = sprintf($query.$restrict_action, $trigger_names['pk_update'], 'BEFORE UPDATE', 'update') . '; END;';
}
if ('CASCADE' == $fkdef['ondelete']) {
$sql_delete = sprintf($query, $trigger_names['pk_delete'], 'AFTER DELETE', 'delete') . $cascade_action_delete. '; END;';
} elseif ('SET NULL' == $fkdef['ondelete']) {
$sql_delete = sprintf($query, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete') . $setnull_action. '; END;';
} elseif ('SET DEFAULT' == $fkdef['ondelete']) {
$sql_delete = sprintf($query, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete') . $setdefault_action. '; END;';
} elseif ('NO ACTION' == $fkdef['ondelete']) {
$sql_delete = sprintf($query.$restrict_action, $trigger_names['pk_delete'], 'AFTER DELETE', 'delete') . '; END;';
} else {
//'RESTRICT'
$sql_delete = sprintf($query.$restrict_action, $trigger_names['pk_delete'], 'BEFORE DELETE', 'delete') . '; END;';
}
if (PEAR::isError($result)) {
return $result;
}
$result = $db->exec($sql_delete);
if (PEAR::isError($result)) {
return $result;
}
$result = $db->exec($sql_update);
if (PEAR::isError($result)) {
return $result;
}
}
}
if (PEAR::isError($result)) {
return $result;
}
return MDB2_OK;
}
// }}}
// {{{ dropTable()
/**
* drop an existing table
*
* @param string $name name of the table that should be dropped
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function dropTable($name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
//delete the triggers associated to existing FK constraints
$constraints = $this->listTableConstraints($name);
if (!PEAR::isError($constraints) && !empty($constraints)) {
$db->loadModule('Reverse', null, true);
foreach ($constraints as $constraint) {
$definition = $db->reverse->getTableConstraintDefinition($name, $constraint);
if (!PEAR::isError($definition) && !empty($definition['foreign'])) {
$result = $this->_dropFKTriggers($name, $constraint, $definition['references']['table']);
if (PEAR::isError($result)) {
return $result;
}
}
}
}
$name = $db->quoteIdentifier($name, true);
return $db->exec("DROP TABLE $name");
}
// }}}
// {{{ vacuum()
/**
* Optimize (vacuum) all the tables in the db (or only the specified table)
* and optionally run ANALYZE.
*
* @param string $table table name (all the tables if empty)
* @param array $options an array with driver-specific options:
* - timeout [int] (in seconds) [mssql-only]
* - analyze [boolean] [pgsql and mysql]
* - full [boolean] [pgsql-only]
* - freeze [boolean] [pgsql-only]
*
* @return mixed MDB2_OK success, a MDB2 error on failure
* @access public
*/
function vacuum($table = null, $options = array())
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = 'VACUUM';
if (!empty($table)) {
$query .= ' '.$db->quoteIdentifier($table, true);
}
return $db->exec($query);
}
// }}}
// {{{ alterTable()
/**
* alter an existing table
*
* @param string $name name of the table that is intended to be changed.
* @param array $changes associative array that contains the details of each type
* of change that is intended to be performed. The types of
* changes that are currently supported are defined as follows:
*
* name
*
* New name for the table.
*
* add
*
* Associative array with the names of fields to be added as
* indexes of the array. The value of each entry of the array
* should be set to another associative array with the properties
* of the fields to be added. The properties of the fields should
* be the same as defined by the MDB2 parser.
*
*
* remove
*
* Associative array with the names of fields to be removed as indexes
* of the array. Currently the values assigned to each entry are ignored.
* An empty array should be used for future compatibility.
*
* rename
*
* Associative array with the names of fields to be renamed as indexes
* of the array. The value of each entry of the array should be set to
* another associative array with the entry named name with the new
* field name and the entry named Declaration that is expected to contain
* the portion of the field declaration already in DBMS specific SQL code
* as it is used in the CREATE TABLE statement.
*
* change
*
* Associative array with the names of the fields to be changed as indexes
* of the array. Keep in mind that if it is intended to change either the
* name of a field and any other properties, the change array entries
* should have the new names of the fields as array indexes.
*
* The value of each entry of the array should be set to another associative
* array with the properties of the fields to that are meant to be changed as
* array entries. These entries should be assigned to the new values of the
* respective properties. The properties of the fields should be the same
* as defined by the MDB2 parser.
*
* Example
* array(
* 'name' => 'userlist',
* 'add' => array(
* 'quota' => array(
* 'type' => 'integer',
* 'unsigned' => 1
* )
* ),
* 'remove' => array(
* 'file_limit' => array(),
* 'time_limit' => array()
* ),
* 'change' => array(
* 'name' => array(
* 'length' => '20',
* 'definition' => array(
* 'type' => 'text',
* 'length' => 20,
* ),
* )
* ),
* 'rename' => array(
* 'sex' => array(
* 'name' => 'gender',
* 'definition' => array(
* 'type' => 'text',
* 'length' => 1,
* 'default' => 'M',
* ),
* )
* )
* )
*
* @param boolean $check indicates whether the function should just check if the DBMS driver
* can perform the requested table alterations if the value is true or
* actually perform them otherwise.
* @access public
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
*/
function alterTable($name, $changes, $check, $options = array())
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
foreach ($changes as $change_name => $change) {
switch ($change_name) {
case 'add':
case 'remove':
case 'change':
case 'name':
case 'rename':
break;
default:
return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
'change type "'.$change_name.'" not yet supported', __FUNCTION__);
}
}
if ($check) {
return MDB2_OK;
}
$db->loadModule('Reverse', null, true);
// actually sqlite 2.x supports no ALTER TABLE at all .. so we emulate it
$fields = $db->manager->listTableFields($name);
if (PEAR::isError($fields)) {
return $fields;
}
$fields = array_flip($fields);
foreach ($fields as $field => $value) {
$definition = $db->reverse->getTableFieldDefinition($name, $field);
if (PEAR::isError($definition)) {
return $definition;
}
$fields[$field] = $definition[0];
}
$indexes = $db->manager->listTableIndexes($name);
if (PEAR::isError($indexes)) {
return $indexes;
}
$indexes = array_flip($indexes);
foreach ($indexes as $index => $value) {
$definition = $db->reverse->getTableIndexDefinition($name, $index);
if (PEAR::isError($definition)) {
return $definition;
}
$indexes[$index] = $definition;
}
$constraints = $db->manager->listTableConstraints($name);
if (PEAR::isError($constraints)) {
return $constraints;
}
if (!array_key_exists('foreign_keys', $options)) {
$options['foreign_keys'] = array();
}
$constraints = array_flip($constraints);
foreach ($constraints as $constraint => $value) {
if (!empty($definition['primary'])) {
if (!array_key_exists('primary', $options)) {
$options['primary'] = $definition['fields'];
//remove from the $constraint array, it's already handled by createTable()
unset($constraints[$constraint]);
}
} else {
$c_definition = $db->reverse->getTableConstraintDefinition($name, $constraint);
if (PEAR::isError($c_definition)) {
return $c_definition;
}
if (!empty($c_definition['foreign'])) {
if (!array_key_exists($constraint, $options['foreign_keys'])) {
$options['foreign_keys'][$constraint] = $c_definition;
}
//remove from the $constraint array, it's already handled by createTable()
unset($constraints[$constraint]);
} else {
$constraints[$constraint] = $c_definition;
}
}
}
$name_new = $name;
$create_order = $select_fields = array_keys($fields);
foreach ($changes as $change_name => $change) {
switch ($change_name) {
case 'add':
foreach ($change as $field_name => $field) {
$fields[$field_name] = $field;
$create_order[] = $field_name;
}
break;
case 'remove':
foreach ($change as $field_name => $field) {
unset($fields[$field_name]);
$select_fields = array_diff($select_fields, array($field_name));
$create_order = array_diff($create_order, array($field_name));
}
break;
case 'change':
foreach ($change as $field_name => $field) {
$fields[$field_name] = $field['definition'];
}
break;
case 'name':
$name_new = $change;
break;
case 'rename':
foreach ($change as $field_name => $field) {
unset($fields[$field_name]);
$fields[$field['name']] = $field['definition'];
$create_order[array_search($field_name, $create_order)] = $field['name'];
}
break;
default:
return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
'change type "'.$change_name.'" not yet supported', __FUNCTION__);
}
}
$data = null;
if (!empty($select_fields)) {
$query = 'SELECT '.implode(', ', $select_fields).' FROM '.$db->quoteIdentifier($name, true);
$data = $db->queryAll($query, null, MDB2_FETCHMODE_ORDERED);
}
$result = $this->dropTable($name);
if (PEAR::isError($result)) {
return $result;
}
$result = $this->createTable($name_new, $fields, $options);
if (PEAR::isError($result)) {
return $result;
}
foreach ($indexes as $index => $definition) {
$this->createIndex($name_new, $index, $definition);
}
foreach ($constraints as $constraint => $definition) {
$this->createConstraint($name_new, $constraint, $definition);
}
if (!empty($select_fields) && !empty($data)) {
$query = 'INSERT INTO '.$db->quoteIdentifier($name_new, true);
$query.= '('.implode(', ', array_slice(array_keys($fields), 0, count($select_fields))).')';
$query.=' VALUES (?'.str_repeat(', ?', (count($select_fields) - 1)).')';
$stmt =& $db->prepare($query, null, MDB2_PREPARE_MANIP);
if (PEAR::isError($stmt)) {
return $stmt;
}
foreach ($data as $row) {
$result = $stmt->execute($row);
if (PEAR::isError($result)) {
return $result;
}
}
}
return MDB2_OK;
}
// }}}
// {{{ listDatabases()
/**
* list all databases
*
* @return mixed array of database names on success, a MDB2 error on failure
* @access public
*/
function listDatabases()
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'list databases is not supported', __FUNCTION__);
}
// }}}
// {{{ listUsers()
/**
* list all users
*
* @return mixed array of user names on success, a MDB2 error on failure
* @access public
*/
function listUsers()
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'list databases is not supported', __FUNCTION__);
}
// }}}
// {{{ listViews()
/**
* list all views in the current database
*
* @return mixed array of view names on success, a MDB2 error on failure
* @access public
*/
function listViews()
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = "SELECT name FROM sqlite_master WHERE type='view' AND sql NOT NULL";
$result = $db->queryCol($query);
if (PEAR::isError($result)) {
return $result;
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
}
return $result;
}
// }}}
// {{{ listTableViews()
/**
* list the views in the database that reference a given table
*
* @param string table for which all referenced views should be found
* @return mixed array of view names on success, a MDB2 error on failure
* @access public
*/
function listTableViews($table)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = "SELECT name, sql FROM sqlite_master WHERE type='view' AND sql NOT NULL";
$views = $db->queryAll($query, array('text', 'text'), MDB2_FETCHMODE_ASSOC);
if (PEAR::isError($views)) {
return $views;
}
$result = array();
foreach ($views as $row) {
if (preg_match("/^create view .* \bfrom\b\s+\b{$table}\b /i", $row['sql'])) {
if (!empty($row['name'])) {
$result[$row['name']] = true;
}
}
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$result = array_change_key_case($result, $db->options['field_case']);
}
return array_keys($result);
}
// }}}
// {{{ listTables()
/**
* list all tables in the current database
*
* @return mixed array of table names on success, a MDB2 error on failure
* @access public
*/
function listTables()
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = "SELECT name FROM sqlite_master WHERE type='table' AND sql NOT NULL ORDER BY name";
$table_names = $db->queryCol($query);
if (PEAR::isError($table_names)) {
return $table_names;
}
$result = array();
foreach ($table_names as $table_name) {
if (!$this->_fixSequenceName($table_name, true)) {
$result[] = $table_name;
}
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
}
return $result;
}
// }}}
// {{{ listTableFields()
/**
* list all fields in a table in the current database
*
* @param string $table name of table that should be used in method
* @return mixed array of field names on success, a MDB2 error on failure
* @access public
*/
function listTableFields($table)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$result = $db->loadModule('Reverse', null, true);
if (PEAR::isError($result)) {
return $result;
}
$query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= 'LOWER(name)='.$db->quote(strtolower($table), 'text');
} else {
$query.= 'name='.$db->quote($table, 'text');
}
$sql = $db->queryOne($query);
if (PEAR::isError($sql)) {
return $sql;
}
$columns = $db->reverse->_getTableColumns($sql);
$fields = array();
foreach ($columns as $column) {
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
if ($db->options['field_case'] == CASE_LOWER) {
$column['name'] = strtolower($column['name']);
} else {
$column['name'] = strtoupper($column['name']);
}
} else {
$column = array_change_key_case($column, $db->options['field_case']);
}
$fields[] = $column['name'];
}
return $fields;
}
// }}}
// {{{ listTableTriggers()
/**
* list all triggers in the database that reference a given table
*
* @param string table for which all referenced triggers should be found
* @return mixed array of trigger names on success, a MDB2 error on failure
* @access public
*/
function listTableTriggers($table = null)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = "SELECT name FROM sqlite_master WHERE type='trigger' AND sql NOT NULL";
if (!is_null($table)) {
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= ' AND LOWER(tbl_name)='.$db->quote(strtolower($table), 'text');
} else {
$query.= ' AND tbl_name='.$db->quote($table, 'text');
}
}
$result = $db->queryCol($query);
if (PEAR::isError($result)) {
return $result;
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
}
return $result;
}
// }}}
// {{{ createIndex()
/**
* Get the stucture of a field into an array
*
* @param string $table name of the table on which the index is to be created
* @param string $name name of the index to be created
* @param array $definition associative array that defines properties of the index to be created.
* Currently, only one property named FIELDS is supported. This property
* is also an associative with the names of the index fields as array
* indexes. Each entry of this array is set to another type of associative
* array that specifies properties of the index that are specific to
* each field.
*
* Currently, only the sorting property is supported. It should be used
* to define the sorting direction of the index. It may be set to either
* ascending or descending.
*
* Not all DBMS support index sorting direction configuration. The DBMS
* drivers of those that do not support it ignore this property. Use the
* function support() to determine whether the DBMS driver can manage indexes.
* Example
* array(
* 'fields' => array(
* 'user_name' => array(
* 'sorting' => 'ascending'
* ),
* 'last_login' => array()
* )
* )
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createIndex($table, $name, $definition)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$table = $db->quoteIdentifier($table, true);
$name = $db->getIndexName($name);
$query = "CREATE INDEX $name ON $table";
$fields = array();
foreach ($definition['fields'] as $field_name => $field) {
$field_string = $field_name;
if (!empty($field['sorting'])) {
switch ($field['sorting']) {
case 'ascending':
$field_string.= ' ASC';
break;
case 'descending':
$field_string.= ' DESC';
break;
}
}
$fields[] = $field_string;
}
$query .= ' ('.implode(', ', $fields) . ')';
return $db->exec($query);
}
// }}}
// {{{ dropIndex()
/**
* drop existing index
*
* @param string $table name of table that should be used in method
* @param string $name name of the index to be dropped
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function dropIndex($table, $name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$name = $db->getIndexName($name);
return $db->exec("DROP INDEX $name");
}
// }}}
// {{{ listTableIndexes()
/**
* list all indexes in a table
*
* @param string $table name of table that should be used in method
* @return mixed array of index names on success, a MDB2 error on failure
* @access public
*/
function listTableIndexes($table)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$table = $db->quote($table, 'text');
$query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= 'LOWER(tbl_name)='.strtolower($table);
} else {
$query.= "tbl_name=$table";
}
$query.= " AND sql NOT NULL ORDER BY name";
$indexes = $db->queryCol($query, 'text');
if (PEAR::isError($indexes)) {
return $indexes;
}
$result = array();
foreach ($indexes as $sql) {
if (preg_match("/^create index ([^ ]+) on /i", $sql, $tmp)) {
$index = $this->_fixIndexName($tmp[1]);
if (!empty($index)) {
$result[$index] = true;
}
}
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$result = array_change_key_case($result, $db->options['field_case']);
}
return array_keys($result);
}
// }}}
// {{{ createConstraint()
/**
* create a constraint on a table
*
* @param string $table name of the table on which the constraint is to be created
* @param string $name name of the constraint to be created
* @param array $definition associative array that defines properties of the constraint to be created.
* Currently, only one property named FIELDS is supported. This property
* is also an associative with the names of the constraint fields as array
* constraints. Each entry of this array is set to another type of associative
* array that specifies properties of the constraint that are specific to
* each field.
*
* Example
* array(
* 'fields' => array(
* 'user_name' => array(),
* 'last_login' => array()
* )
* )
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createConstraint($table, $name, $definition)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
if (!empty($definition['primary'])) {
return $db->manager->alterTable($table, array(), false, array('primary' => $definition['fields']));
}
if (!empty($definition['foreign'])) {
return $db->manager->alterTable($table, array(), false, array('foreign_keys' => array($name => $definition)));
}
$table = $db->quoteIdentifier($table, true);
$name = $db->getIndexName($name);
$query = "CREATE UNIQUE INDEX $name ON $table";
$fields = array();
foreach ($definition['fields'] as $field_name => $field) {
$field_string = $field_name;
if (!empty($field['sorting'])) {
switch ($field['sorting']) {
case 'ascending':
$field_string.= ' ASC';
break;
case 'descending':
$field_string.= ' DESC';
break;
}
}
$fields[] = $field_string;
}
$query .= ' ('.implode(', ', $fields) . ')';
return $db->exec($query);
}
// }}}
// {{{ dropConstraint()
/**
* drop existing constraint
*
* @param string $table name of table that should be used in method
* @param string $name name of the constraint to be dropped
* @param string $primary hint if the constraint is primary
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function dropConstraint($table, $name, $primary = false)
{
if ($primary || $name == 'PRIMARY') {
return $this->alterTable($table, array(), false, array('primary' => null));
}
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
//is it a FK constraint? If so, also delete the associated triggers
$db->loadModule('Reverse', null, true);
$definition = $db->reverse->getTableConstraintDefinition($table, $name);
if (!PEAR::isError($definition) && !empty($definition['foreign'])) {
//first drop the FK enforcing triggers
$result = $this->_dropFKTriggers($table, $name, $definition['references']['table']);
if (PEAR::isError($result)) {
return $result;
}
//then drop the constraint itself
return $this->alterTable($table, array(), false, array('foreign_keys' => array($name => null)));
}
$name = $db->getIndexName($name);
return $db->exec("DROP INDEX $name");
}
// }}}
// {{{ _dropFKTriggers()
/**
* Drop the triggers created to enforce the FOREIGN KEY constraint on the table
*
* @param string $table table name
* @param string $fkname FOREIGN KEY constraint name
* @param string $referenced_table referenced table name
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access private
*/
function _dropFKTriggers($table, $fkname, $referenced_table)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$triggers = $this->listTableTriggers($table);
$triggers2 = $this->listTableTriggers($referenced_table);
if (!PEAR::isError($triggers2) && !PEAR::isError($triggers)) {
$triggers = array_merge($triggers, $triggers2);
$pattern = '/^'.$fkname.'(_pk)?_(insert|update|delete)_trg$/i';
foreach ($triggers as $trigger) {
if (preg_match($pattern, $trigger)) {
$result = $db->exec('DROP TRIGGER '.$trigger);
if (PEAR::isError($result)) {
return $result;
}
}
}
}
return MDB2_OK;
}
// }]]
// {{{ listTableConstraints()
/**
* list all constraints in a table
*
* @param string $table name of table that should be used in method
* @return mixed array of constraint names on success, a MDB2 error on failure
* @access public
*/
function listTableConstraints($table)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$table = $db->quote($table, 'text');
$query = "SELECT sql FROM sqlite_master WHERE type='index' AND ";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= 'LOWER(tbl_name)='.strtolower($table);
} else {
$query.= "tbl_name=$table";
}
$query.= " AND sql NOT NULL ORDER BY name";
$indexes = $db->queryCol($query, 'text');
if (PEAR::isError($indexes)) {
return $indexes;
}
$result = array();
foreach ($indexes as $sql) {
if (preg_match("/^create unique index ([^ ]+) on /i", $sql, $tmp)) {
$index = $this->_fixIndexName($tmp[1]);
if (!empty($index)) {
$result[$index] = true;
}
}
}
// also search in table definition for PRIMARY KEYs...
$query = "SELECT sql FROM sqlite_master WHERE type='table' AND ";
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$query.= 'LOWER(name)='.strtolower($table);
} else {
$query.= "name=$table";
}
$query.= " AND sql NOT NULL ORDER BY name";
$table_def = $db->queryOne($query, 'text');
if (PEAR::isError($table_def)) {
return $table_def;
}
if (preg_match("/\bPRIMARY\s+KEY\b/i", $table_def, $tmp)) {
$result['primary'] = true;
}
// ...and for FOREIGN KEYs
if (preg_match_all("/\bCONSTRAINT\b\s+([^\s]+)\s+\bFOREIGN\s+KEY/imsx", $table_def, $tmp)) {
foreach ($tmp[1] as $fk) {
$result[$fk] = true;
}
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$result = array_change_key_case($result, $db->options['field_case']);
}
return array_keys($result);
}
// }}}
// {{{ createSequence()
/**
* create sequence
*
* @param string $seq_name name of the sequence to be created
* @param string $start start value of the sequence; default is 1
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createSequence($seq_name, $start = 1)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$sequence_name = $db->quoteIdentifier($db->getSequenceName($seq_name), true);
$seqcol_name = $db->quoteIdentifier($db->options['seqcol_name'], true);
$query = "CREATE TABLE $sequence_name ($seqcol_name INTEGER PRIMARY KEY DEFAULT 0 NOT NULL)";
$res = $db->exec($query);
if (PEAR::isError($res)) {
return $res;
}
if ($start == 1) {
return MDB2_OK;
}
$res = $db->exec("INSERT INTO $sequence_name ($seqcol_name) VALUES (".($start-1).')');
if (!PEAR::isError($res)) {
return MDB2_OK;
}
// Handle error
$result = $db->exec("DROP TABLE $sequence_name");
if (PEAR::isError($result)) {
return $db->raiseError($result, null, null,
'could not drop inconsistent sequence table', __FUNCTION__);
}
return $db->raiseError($res, null, null,
'could not create sequence table', __FUNCTION__);
}
// }}}
// {{{ dropSequence()
/**
* drop existing sequence
*
* @param string $seq_name name of the sequence to be dropped
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function dropSequence($seq_name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$sequence_name = $db->quoteIdentifier($db->getSequenceName($seq_name), true);
return $db->exec("DROP TABLE $sequence_name");
}
// }}}
// {{{ listSequences()
/**
* list all sequences in the current database
*
* @return mixed array of sequence names on success, a MDB2 error on failure
* @access public
*/
function listSequences()
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = "SELECT name FROM sqlite_master WHERE type='table' AND sql NOT NULL ORDER BY name";
$table_names = $db->queryCol($query);
if (PEAR::isError($table_names)) {
return $table_names;
}
$result = array();
foreach ($table_names as $table_name) {
if ($sqn = $this->_fixSequenceName($table_name, true)) {
$result[] = $sqn;
}
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
$result = array_map(($db->options['field_case'] == CASE_LOWER ? 'strtolower' : 'strtoupper'), $result);
}
return $result;
}
// }}}
}
?>

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