diff options
Diffstat (limited to 'program/lib/MDB2/Driver/Manager/sqlite.php')
| -rw-r--r-- | program/lib/MDB2/Driver/Manager/sqlite.php | 1325 |
1 files changed, 1325 insertions, 0 deletions
diff --git a/program/lib/MDB2/Driver/Manager/sqlite.php b/program/lib/MDB2/Driver/Manager/sqlite.php new file mode 100644 index 000000000..f126ff146 --- /dev/null +++ b/program/lib/MDB2/Driver/Manager/sqlite.php @@ -0,0 +1,1325 @@ +<?php
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2007 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 1.72 2007/12/03 20:59:15 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");
+ }
+
+ // }}}
+ // {{{ 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\s*\(([^)]+)/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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