/inc/MDB2/Driver/Manager/sqlite.php
PHP | 727 lines | 338 code | 62 blank | 327 comment | 59 complexity | 1656e64a5c9f32aaa9a1dca44772cdd7 MD5 | raw file
Possible License(s): GPL-2.0, BSD-3-Clause, Apache-2.0, LGPL-2.1
- <?php
- // +----------------------------------------------------------------------+
- // | PHP versions 4 and 5 |
- // +----------------------------------------------------------------------+
- // | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
- // | Stig. S. Bakken, Lukas Smith |
- // | 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. |
- // +----------------------------------------------------------------------+
- // | Author: Lukas Smith <smith@pooteeweet.org> |
- // +----------------------------------------------------------------------+
- //
- // $Id$
- //
- require_once 'MDB2/Driver/Manager/Common.php';
- /**
- * MDB2 SQLite driver for the management modules
- *
- * @package MDB2
- * @category Database
- * @author Lukas Smith <smith@pooteeweet.org>
- */
- class MDB2_Driver_Manager_sqlite extends MDB2_Driver_Manager_Common
- {
- // {{{ createDatabase()
- /**
- * create a new database
- *
- * @param string $name name of the database that should be created
- * @return mixed MDB2_OK on success, a MDB2 error on failure
- * @access public
- */
- function createDatabase($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_ALREADY_EXISTS, null, null,
- 'createDatabase: database already exists');
- }
- $php_errormsg = '';
- $handle = @sqlite_open($database_file, $db->dsn['mode'], $php_errormsg);
- if (!$handle) {
- return $db->raiseError(MDB2_ERROR_CANNOT_CREATE, null, null,
- 'createDatabase: '.(isset($php_errormsg) ? $php_errormsg : 'could not create the database file'));
- }
- @sqlite_close($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,
- 'dropDatabase: database does not exist');
- }
- $result = @unlink($database_file);
- if (!$result) {
- return $db->raiseError(MDB2_ERROR_CANNOT_DROP, null, null,
- 'dropDatabase: '.(isset($php_errormsg) ? $php_errormsg : 'could not remove the database file'));
- }
- return MDB2_OK;
- }
- // }}}
- // {{{ 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 Metabase 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 Metabase 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)
- {
- $db =& $this->getDBInstance();
- if (PEAR::isError($db)) {
- return $db;
- }
- // actually sqlite 2.x supports no ALTER TABLE at all ..
- // so the only solution is:
- // - reverse engineer table schema
- // - alter table schema in memory
- // - read all data into memory (or file?)
- // - drop table
- // - create table
- // - import data
- $version = $db->getServerVersion();
- foreach ($changes as $change_name => $change) {
- switch ($change_name) {
- case 'add':
- if ($version['major'] >= 3 && $version['minor'] >= 1) {
- break;
- }
- case 'name':
- if ($version['major'] >= 3 && $version['minor'] >= 1) {
- break;
- }
- case 'remove':
- case 'change':
- case 'rename':
- default:
- return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
- 'alterTable: change type "'.$change_name.'" not yet supported');
- }
- }
- if ($check) {
- return MDB2_OK;
- }
- $query = '';
- if (array_key_exists('name', $changes)) {
- $change_name = $db->quoteIdentifier($changes['name'], true);
- $query .= 'RENAME TO ' . $change_name;
- }
- if (array_key_exists('add', $changes)) {
- foreach ($changes['add'] as $field_name => $field) {
- if ($query) {
- $query.= ', ';
- }
- $query.= 'ADD COLUMN ' . $db->getDeclaration($field['type'], $field_name, $field);
- }
- }
- if (!$query) {
- return MDB2_OK;
- }
- $name = $db->quoteIdentifier($name, true);
- return $db->exec("ALTER TABLE $name $query");
- }
- // }}}
- // {{{ listDatabases()
- /**
- * list all databases
- *
- * @return mixed data array 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,
- 'listDatabases: list databases is not supported');
- }
- // }}}
- // {{{ listUsers()
- /**
- * list all users
- *
- * @return mixed data array 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,
- 'listDatabases: list databases is not supported');
- }
- // }}}
- // {{{ listTables()
- /**
- * list all tables in the current database
- *
- * @return mixed data array 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 tables in the current database
- *
- * @param string $table name of table that should be used in method
- * @return mixed data array on success, a MDB2 error on failure
- * @access public
- */
- function listTableFields($table)
- {
- $db =& $this->getDBInstance();
- if (PEAR::isError($db)) {
- return $db;
- }
- $table = $db->quoteIdentifier($table, true);
- $query = "SELECT * FROM $table";
- $db->setLimit(1);
- $result2 = $db->query($query);
- if (PEAR::isError($result2)) {
- return $result2;
- }
- $result = $result2->getColumnNames();
- $result2->free();
- if (PEAR::isError($result)) {
- return $result;
- }
- return array_flip($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 (array_key_exists('sorting', $field)) {
- switch ($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 $table name of table that should be used in method
- * @return mixed data array on success, a MDB2 error on failure
- * @access public
- */
- function listTableIndexes($table)
- {
- $db =& $this->getDBInstance();
- if (PEAR::isError($db)) {
- return $db;
- }
- $query = "SELECT sql FROM sqlite_master WHERE type='index' AND tbl_name='$table' AND sql NOT NULL ORDER BY name";
- $indexes = $db->queryCol($query, 'text');
- if (PEAR::isError($indexes)) {
- return $indexes;
- }
- $result = array();
- foreach ($indexes as $sql) {
- $sql = strtolower($sql);
- if (preg_match("/^create index ([^ ]*) on /", $sql, $tmp)) {
- $result[$this->_fixIndexName($tmp[1])] = true;
- }
- }
- if ($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 (array_key_exists('primary', $definition) && $definition['primary']) {
- return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
- 'createConstraint: Creating Primary Constraints is not supported');
- }
- $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 (array_key_exists('sorting', $field)) {
- switch ($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 $name name of the constraint to be dropped
- * @return mixed MDB2_OK on success, a MDB2 error on failure
- * @access public
- */
- function dropConstraint($table, $name)
- {
- $db =& $this->getDBInstance();
- if (PEAR::isError($db)) {
- return $db;
- }
- if ($name == 'PRIMARY') {
- return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
- 'dropConstraints: Dropping Primary Constraints is not supported');
- }
- $name = $db->getIndexName($name);
- return $db->exec("DROP INDEX $name");
- }
- // }}}
- // {{{ listTableConstraints()
- /**
- * list all sonstraints in a table
- *
- * @param string $table name of table that should be used in method
- * @return mixed data array on success, a MDB2 error on failure
- * @access public
- */
- function listTableConstraints($table)
- {
- $db =& $this->getDBInstance();
- if (PEAR::isError($db)) {
- return $db;
- }
- $query = "SELECT sql FROM sqlite_master WHERE type='index' AND tbl_name='$table' AND sql NOT NULL ORDER BY name";
- $indexes = $db->queryCol($query, 'text');
- if (PEAR::isError($indexes)) {
- return $indexes;
- }
- $result = array();
- foreach ($indexes as $sql) {
- $sql = strtolower($sql);
- if (preg_match("/^create unique index ([^ ]*) on /", $sql, $tmp)) {
- $result[$this->_fixIndexName($tmp[1])] = true;
- }
- }
- if ($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(MDB2_ERROR, null, null,
- 'createSequence: could not drop inconsistent sequence table ('.
- $result->getMessage().' ('.$result->getUserinfo().'))');
- }
- return $db->raiseError(MDB2_ERROR, null, null,
- 'createSequence: could not create sequence table ('.
- $res->getMessage().' ('.$res->getUserinfo().'))');
- }
- // }}}
- // {{{ 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 data array 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;
- }
- // }}}
- }
- ?>