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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 |
// | 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: Common.php 273526 2009-01-14 15:01:21Z quipo $
//
/**
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
* @author Lorenzo Alberton <l.alberton@quipo.it>
*/
/**
* Base class for the management modules that is extended by each MDB2 driver
*
* To load this module in the MDB2 object:
* $mdb->loadModule('Manager');
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Driver_Manager_Common extends MDB2_Module_Common
{
// {{{ splitTableSchema()
/**
* Split the "[owner|schema].table" notation into an array
*
* @param string $table [schema and] table name
*
* @return array array(schema, table)
* @access private
*/
function splitTableSchema($table)
{
$ret = array();
if (strpos($table, '.') !== false) {
return explode('.', $table);
}
return array(null, $table);
}
// }}}
// {{{ getFieldDeclarationList()
/**
* Get declaration of a number of field in bulk
*
* @param array $fields a multidimensional associative array.
* The first dimension determines the field name, while the second
* dimension is keyed with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* default
* Boolean value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
*
* @return mixed string on success, a MDB2 error on failure
* @access public
*/
function getFieldDeclarationList($fields)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
if (!is_array($fields) || empty($fields)) {
return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'missing any fields', __FUNCTION__);
}
foreach ($fields as $field_name => $field) {
$query = $db->getDeclaration($field['type'], $field_name, $field);
if (PEAR::isError($query)) {
return $query;
}
$query_fields[] = $query;
}
return implode(', ', $query_fields);
}
// }}}
// {{{ _fixSequenceName()
/**
* Removes any formatting in an sequence name using the 'seqname_format' option
*
* @param string $sqn string that containts name of a potential sequence
* @param bool $check if only formatted sequences should be returned
* @return string name of the sequence with possible formatting removed
* @access protected
*/
function _fixSequenceName($sqn, $check = false)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$seq_pattern = '/^'.preg_replace('/%s/', '([a-z0-9_]+)', $db->options['seqname_format']).'$/i';
$seq_name = preg_replace($seq_pattern, '\\1', $sqn);
if ($seq_name && !strcasecmp($sqn, $db->getSequenceName($seq_name))) {
return $seq_name;
}
if ($check) {
return false;
}
return $sqn;
}
// }}}
// {{{ _fixIndexName()
/**
* Removes any formatting in an index name using the 'idxname_format' option
*
* @param string $idx string that containts name of anl index
* @return string name of the index with eventual formatting removed
* @access protected
*/
function _fixIndexName($idx)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$idx_pattern = '/^'.preg_replace('/%s/', '([a-z0-9_]+)', $db->options['idxname_format']).'$/i';
$idx_name = preg_replace($idx_pattern, '\\1', $idx);
if ($idx_name && !strcasecmp($idx, $db->getIndexName($idx_name))) {
return $idx_name;
}
return $idx;
}
// }}}
// {{{ createDatabase()
/**
* create a new database
*
* @param string $name name of the database that should be created
* @param array $options array with charset, collation info
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createDatabase($database, $options = array())
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ alterDatabase()
/**
* alter an existing database
*
* @param string $name name of the database that should be created
* @param array $options array with charset, collation info
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function alterDatabase($database, $options = array())
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ dropDatabase()
/**
* drop an existing database
*
* @param string $name name of the database that should be dropped
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function dropDatabase($database)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ _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'])).')';
}
$name = $db->quoteIdentifier($name, true);
$result = 'CREATE ';
if (!empty($options['temporary'])) {
$result .= $this->_getTemporaryTableQuery();
}
$result .= " TABLE $name ($query_fields)";
return $result;
}
// }}}
// {{{ _getTemporaryTableQuery()
/**
* A method to return the required SQL string that fits between CREATE ... TABLE
* to create the table as a temporary table.
*
* Should be overridden in driver classes to return the correct string for the
* specific database type.
*
* The default is to return the string "TEMPORARY" - this will result in a
* SQL error for any database that does not support temporary tables, or that
* requires a different SQL command from "CREATE TEMPORARY TABLE".
*
* @return string The string required to be placed between "CREATE" and "TABLE"
* to generate a temporary table, if possible.
*/
function _getTemporaryTableQuery()
{
return 'TEMPORARY';
}
// }}}
// {{{ 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
* The indexes of the array entries are the names of the fields of the table an
* the array entry values are associative arrays like those that are meant to be
* passed with the field definitions to get[Type]Declaration() functions.
* array(
* 'id' => array(
* 'type' => 'integer',
* 'unsigned' => 1
* 'notnull' => 1
* 'default' => 0
* ),
* 'name' => array(
* 'type' => 'text',
* 'length' => 12
* ),
* 'password' => array(
* 'type' => 'text',
* 'length' => 12
* )
* );
* @param array $options An associative array of table options:
* array(
* 'comment' => 'Foo',
* 'temporary' => true|false,
* );
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createTable($name, $fields, $options = array())
{
$query = $this->_getCreateTableQuery($name, $fields, $options);
if (PEAR::isError($query)) {
return $query;
}
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$result = $db->exec($query);
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;
}
$name = $db->quoteIdentifier($name, true);
return $db->exec("DROP TABLE $name");
}
// }}}
// {{{ truncateTable()
/**
* Truncate an existing table (if the TRUNCATE TABLE syntax is not supported,
* it falls back to a DELETE FROM TABLE query)
*
* @param string $name name of the table that should be truncated
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function truncateTable($name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$name = $db->quoteIdentifier($name, true);
return $db->exec("DELETE FROM $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;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ 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)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ 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,
'method not implementedd', __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 $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ listViews()
/**
* list all views in the current database
*
* @param string database, the current is default
* NB: not all the drivers can get the view names from
* a database other than the current one
* @return mixed array of view names on success, a MDB2 error on failure
* @access public
*/
function listViews($database = null)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ listTableViews()
/**
* list the views in the database that reference a given table
*
* @param string table for which all referenced views should be found
* @return mixed array of view names on success, a MDB2 error on failure
* @access public
*/
function listTableViews($table)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ listTableTriggers()
/**
* list all triggers in the database that reference a given table
*
* @param string table for which all referenced triggers should be found
* @return mixed array of trigger names on success, a MDB2 error on failure
* @access public
*/
function listTableTriggers($table = null)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ listFunctions()
/**
* list all functions in the current database
*
* @return mixed array of function names on success, a MDB2 error on failure
* @access public
*/
function listFunctions()
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ listTables()
/**
* list all tables in the current database
*
* @param string database, the current is default.
* NB: not all the drivers can get the table names from
* a database other than the current one
* @return mixed array of table names on success, a MDB2 error on failure
* @access public
*/
function listTables($database = null)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ 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;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ 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 $definition associative array that defines properties of the index to be created.
* Currently, only one property named FIELDS is supported. This property
* is also an associative with the names of the index fields as array
* indexes. Each entry of this array is set to another type of associative
* array that specifies properties of the index that are specific to
* each field.
*
* Currently, only the sorting property is supported. It should be used
* to define the sorting direction of the index. It may be set to either
* ascending or descending.
*
* Not all DBMS support index sorting direction configuration. The DBMS
* drivers of those that do not support it ignore this property. Use the
* function supports() to determine whether the DBMS driver can manage indexes.
*
* Example
* array(
* 'fields' => array(
* 'user_name' => array(
* 'sorting' => 'ascending'
* ),
* 'last_login' => array()
* )
* )
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createIndex($table, $name, $definition)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$table = $db->quoteIdentifier($table, true);
$name = $db->quoteIdentifier($db->getIndexName($name), true);
$query = "CREATE INDEX $name ON $table";
$fields = array();
foreach (array_keys($definition['fields']) as $field) {
$fields[] = $db->quoteIdentifier($field, true);
}
$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 = $db->quoteIdentifier($db->getIndexName($name), true);
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;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ _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)
{
return '';
}
// }}}
// {{{ 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 $definition associative array that defines properties of the constraint to be created.
* The full structure of the array looks like this:
* <pre>
* array (
* [primary] => 0
* [unique] => 0
* [foreign] => 1
* [check] => 0
* [fields] => array (
* [field1name] => array() // one entry per each field covered
* [field2name] => array() // by the index
* [field3name] => array(
* [sorting] => ascending
* [position] => 3
* )
* )
* [references] => array(
* [table] => name
* [fields] => array(
* [field1name] => array( //one entry per each referenced field
* [position] => 1
* )
* )
* )
* [deferrable] => 0
* [initiallydeferred] => 0
* [onupdate] => CASCADE|RESTRICT|SET NULL|SET DEFAULT|NO ACTION
* [ondelete] => CASCADE|RESTRICT|SET NULL|SET DEFAULT|NO ACTION
* [match] => SIMPLE|PARTIAL|FULL
* );
* </pre>
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function createConstraint($table, $name, $definition)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$table = $db->quoteIdentifier($table, true);
$name = $db->quoteIdentifier($db->getIndexName($name), true);
$query = "ALTER TABLE $table ADD CONSTRAINT $name";
if (!empty($definition['primary'])) {
$query.= ' PRIMARY KEY';
} elseif (!empty($definition['unique'])) {
$query.= ' UNIQUE';
} elseif (!empty($definition['foreign'])) {
$query.= ' FOREIGN KEY';
}
$fields = array();
foreach (array_keys($definition['fields']) as $field) {
$fields[] = $db->quoteIdentifier($field, true);
}
$query .= ' ('. implode(', ', $fields) . ')';
if (!empty($definition['foreign'])) {
$query.= ' REFERENCES ' . $db->quoteIdentifier($definition['references']['table'], true);
$referenced_fields = array();
foreach (array_keys($definition['references']['fields']) as $field) {
$referenced_fields[] = $db->quoteIdentifier($field, true);
}
$query .= ' ('. implode(', ', $referenced_fields) . ')';
$query .= $this->_getAdvancedFKOptions($definition);
}
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)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$table = $db->quoteIdentifier($table, true);
$name = $db->quoteIdentifier($db->getIndexName($name), true);
return $db->exec("ALTER TABLE $table DROP CONSTRAINT $name");
}
// }}}
// {{{ 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;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ 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;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ dropSequence()
/**
* drop existing sequence
*
* @param string $seq_name name of the sequence to be dropped
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function dropSequence($name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ listSequences()
/**
* list all sequences in the current database
*
* @param string database, the current is default
* NB: not all the drivers can get the sequence names from
* a database other than the current one
* @return mixed array of sequence names on success, a MDB2 error on failure
* @access public
*/
function listSequences($database = null)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
}
?>
