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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. |
// +----------------------------------------------------------------------+
// | Author: Paul Cooper <pgc@ucecom.com> |
// +----------------------------------------------------------------------+
//
// $Id: pgsql.php 295587 2010-02-28 17:16:38Z quipo $
require_once 'MDB2/Driver/Manager/Common.php';
/**
* MDB2 MySQL driver for the management modules
*
* @package MDB2
* @category Database
* @author Paul Cooper <pgc@ucecom.com>
*/
class MDB2_Driver_Manager_pgsql 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;
}
$name = $db->quoteIdentifier($name, true);
$query = 'CREATE DATABASE ' . $name;
if (!empty($options['charset'])) {
$query .= ' WITH ENCODING ' . $db->quote($options['charset'], 'text');
}
return $db->standaloneQuery($query, null, true);
}
// }}}
// {{{ alterDatabase()
/**
* alter an existing database
*
* @param string $name name of the database that is intended to be changed
* @param array $options array with name, owner info
*
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function alterDatabase($name, $options = array())
{
$db = $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = 'ALTER DATABASE '. $db->quoteIdentifier($name, true);
if (!empty($options['name'])) {
$query .= ' RENAME TO ' . $options['name'];
}
if (!empty($options['owner'])) {
$query .= ' OWNER TO ' . $options['owner'];
}
return $db->standaloneQuery($query, null, true);
}
// }}}
// {{{ 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;
}
$name = $db->quoteIdentifier($name, true);
$query = "DROP DATABASE $name";
return $db->standaloneQuery($query, null, true);
}
// }}}
// {{{ _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'])) {
$query .= ' ON UPDATE '.$definition['onupdate'];
}
if (!empty($definition['ondelete'])) {
$query .= ' ON DELETE '.$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;
}
// }}}
// {{{ 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("TRUNCATE 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;
}
$query = 'VACUUM';
if (!empty($options['full'])) {
$query .= ' FULL';
}
if (!empty($options['freeze'])) {
$query .= ' FREEZE';
}
if (!empty($options['analyze'])) {
$query .= ' ANALYZE';
}
if (!empty($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)
{
$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;
}
$name = $db->quoteIdentifier($name, true);
if (!empty($changes['remove']) && is_array($changes['remove'])) {
foreach ($changes['remove'] as $field_name => $field) {
$field_name = $db->quoteIdentifier($field_name, true);
$query = 'DROP ' . $field_name;
$result = $db->exec("ALTER TABLE $name $query");
if (PEAR::isError($result)) {
return $result;
}
}
}
if (!empty($changes['rename']) && is_array($changes['rename'])) {
foreach ($changes['rename'] as $field_name => $field) {
$field_name = $db->quoteIdentifier($field_name, true);
$result = $db->exec("ALTER TABLE $name RENAME COLUMN $field_name TO ".$db->quoteIdentifier($field['name'], true));
if (PEAR::isError($result)) {
return $result;
}
}
}
if (!empty($changes['add']) && is_array($changes['add'])) {
foreach ($changes['add'] as $field_name => $field) {
$query = 'ADD ' . $db->getDeclaration($field['type'], $field_name, $field);
$result = $db->exec("ALTER TABLE $name $query");
if (PEAR::isError($result)) {
return $result;
}
}
}
if (!empty($changes['change']) && is_array($changes['change'])) {
foreach ($changes['change'] as $field_name => $field) {
$field_name = $db->quoteIdentifier($field_name, true);
if (!empty($field['definition']['type'])) {
$server_info = $db->getServerVersion();
if (PEAR::isError($server_info)) {
return $server_info;
}
if (is_array($server_info) && $server_info['major'] < 8) {
return $db->raiseError(MDB2_ERROR_CANNOT_ALTER, null, null,
'changing column type for "'.$change_name.'\" requires PostgreSQL 8.0 or above', __FUNCTION__);
}
$db->loadModule('Datatype', null, true);
$type = $db->datatype->getTypeDeclaration($field['definition']);
$query = "ALTER $field_name TYPE $type USING CAST($field_name AS $type)";
$result = $db->exec("ALTER TABLE $name $query");
if (PEAR::isError($result)) {
return $result;
}
}
if (array_key_exists('default', $field['definition'])) {
$query = "ALTER $field_name SET DEFAULT ".$db->quote($field['definition']['default'], $field['definition']['type']);
$result = $db->exec("ALTER TABLE $name $query");
if (PEAR::isError($result)) {
return $result;
}
}
if (array_key_exists('notnull', $field['definition'])) {
$query = "ALTER $field_name ".($field['definition']['notnull'] ? 'SET' : 'DROP').' NOT NULL';
$result = $db->exec("ALTER TABLE $name $query");
if (PEAR::isError($result)) {
return $result;
}
}
}
}
if (!empty($changes['name'])) {
$change_name = $db->quoteIdentifier($changes['name'], true);
$result = $db->exec("ALTER TABLE $name RENAME TO ".$change_name);
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;
}
$query = 'SELECT datname FROM pg_database';
$result2 = $db->standaloneQuery($query, array('text'), false);
if (!MDB2::isResultCommon($result2)) {
return $result2;
}
$result = $result2->fetchCol();
$result2->free();
if (PEAR::isError($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;
}
// }}}
// {{{ 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;
}
$query = 'SELECT usename FROM pg_user';
$result2 = $db->standaloneQuery($query, array('text'), false);
if (!MDB2::isResultCommon($result2)) {
return $result2;
}
$result = $result2->fetchCol();
$result2->free();
return $result;
}
// }}}
// {{{ 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 viewname
FROM pg_views
WHERE schemaname NOT IN ('pg_catalog', 'information_schema')
AND viewname !~ '^pg_'";
$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 viewname FROM pg_views NATURAL JOIN pg_tables';
$query.= ' WHERE tablename ='.$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;
}
// }}}
// {{{ 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;
}
$query = "
SELECT
proname
FROM
pg_proc pr,
pg_type tp
WHERE
tp.oid = pr.prorettype
AND pr.proisagg = FALSE
AND tp.typname <> 'trigger'
AND pr.pronamespace IN
(SELECT oid FROM pg_namespace WHERE nspname NOT LIKE 'pg_%' AND nspname != 'information_schema')";
$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 $result;
}
// }}}
// {{{ listTableTriggers()
/**
* list all triggers in the database that reference a given table
*
* @param string table for which all referenced triggers should be found
* @return mixed array of trigger names on success, a MDB2 error on failure
* @access public
*/
function listTableTriggers($table = null)
{
$db = $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = 'SELECT trg.tgname AS trigger_name
FROM pg_trigger trg,
pg_class tbl
WHERE trg.tgrelid = tbl.oid';
if (null !== $table) {
$table = $db->quote(strtoupper($table), 'text');
$query .= " AND UPPER(tbl.relname) = $table";
}
$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;
}
// }}}
// {{{ 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;
}
// gratuitously stolen from PEAR DB _getSpecialQuery in pgsql.php
$query = 'SELECT c.relname AS "Name"'
. ' FROM pg_class c, pg_user u'
. ' WHERE c.relowner = u.usesysid'
. " AND c.relkind = 'r'"
. ' AND NOT EXISTS'
. ' (SELECT 1 FROM pg_views'
. ' WHERE viewname = c.relname)'
. " AND c.relname !~ '^(pg_|sql_)'"
. ' UNION'
. ' SELECT c.relname AS "Name"'
. ' FROM pg_class c'
. " WHERE c.relkind = 'r'"
. ' AND NOT EXISTS'
. ' (SELECT 1 FROM pg_views'
. ' WHERE viewname = c.relname)'
. ' AND NOT EXISTS'
. ' (SELECT 1 FROM pg_user'
. ' WHERE usesysid = c.relowner)'
. " AND c.relname !~ '^pg_'";
$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;
}
// }}}
// {{{ 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 $db;
}
list($schema, $table) = $this->splitTableSchema($table);
$table = $db->quoteIdentifier($table, true);
if (!empty($schema)) {
$table = $db->quoteIdentifier($schema, true) . '.' .$table;
}
$db->setLimit(1);
$result2 = $db->query("SELECT * FROM $table");
if (PEAR::isError($result2)) {
return $result2;
}
$result = $result2->getColumnNames();
$result2->free();
if (PEAR::isError($result)) {
return $result;
}
return array_flip($result);
}
// }}}
// {{{ 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 $db;
}
list($schema, $table) = $this->splitTableSchema($table);
$table = $db->quote($table, 'text');
$subquery = "SELECT indexrelid
FROM pg_index
LEFT JOIN pg_class ON pg_class.oid = pg_index.indrelid
LEFT JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
WHERE pg_class.relname = $table
AND indisunique != 't'
AND indisprimary != 't'";
if (!empty($schema)) {
$subquery .= ' AND pg_namespace.nspname = '.$db->quote($schema, 'text');
}
$query = "SELECT relname FROM pg_class WHERE oid IN ($subquery)";
$indexes = $db->queryCol($query, 'text');
if (PEAR::isError($indexes)) {
return $indexes;
}
$result = array();
foreach ($indexes as $index) {
$index = $this->_fixIndexName($index);
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);
}
// }}}
// {{{ 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;
}
// is it an UNIQUE index?
$query = 'SELECT relname
FROM pg_class
WHERE oid IN (
SELECT indexrelid
FROM pg_index, pg_class
WHERE pg_class.relname = '.$db->quote($table, 'text').'
AND pg_class.oid = pg_index.indrelid
AND indisunique = \'t\')
EXCEPT
SELECT conname
FROM pg_constraint, pg_class
WHERE pg_constraint.conrelid = pg_class.oid
AND relname = '. $db->quote($table, 'text');
$unique = $db->queryCol($query, 'text');
if (PEAR::isError($unique) || empty($unique)) {
// not an UNIQUE index, maybe a CONSTRAINT
return parent::dropConstraint($table, $name, $primary);
}
if (in_array($name, $unique)) {
return $db->exec('DROP INDEX '.$db->quoteIdentifier($name, true));
}
$idxname = $db->getIndexName($name);
if (in_array($idxname, $unique)) {
return $db->exec('DROP INDEX '.$db->quoteIdentifier($idxname, true));
}
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
$name . ' is not an existing constraint for table ' . $table, __FUNCTION__);
}
// }}}
// {{{ 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 $db;
}
list($schema, $table) = $this->splitTableSchema($table);
$table = $db->quote($table, 'text');
$query = 'SELECT conname
FROM pg_constraint
LEFT JOIN pg_class ON pg_constraint.conrelid = pg_class.oid
LEFT JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
WHERE relname = ' .$table;
if (!empty($schema)) {
$query .= ' AND pg_namespace.nspname = ' . $db->quote($schema, 'text');
}
$query .= '
UNION DISTINCT
SELECT relname
FROM pg_class
WHERE oid IN (
SELECT indexrelid
FROM pg_index
LEFT JOIN pg_class ON pg_class.oid = pg_index.indrelid
LEFT JOIN pg_namespace ON pg_class.relnamespace = pg_namespace.oid
WHERE pg_class.relname = '.$table.'
AND indisunique = \'t\'';
if (!empty($schema)) {
$query .= ' AND pg_namespace.nspname = ' . $db->quote($schema, 'text');
}
$query .= ')';
$constraints = $db->queryCol($query);
if (PEAR::isError($constraints)) {
return $constraints;
}
$result = array();
foreach ($constraints as $constraint) {
$constraint = $this->_fixIndexName($constraint);
if (!empty($constraint)) {
$result[$constraint] = true;
}
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
&& $db->options['field_case'] == CASE_LOWER
) {
$result = array_change_key_case($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);
return $db->exec("CREATE SEQUENCE $sequence_name INCREMENT 1".
($start < 1 ? " MINVALUE $start" : '')." START $start");
}
// }}}
// {{{ 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 SEQUENCE $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 relname FROM pg_class WHERE relkind = 'S' AND relnamespace IN";
$query.= "(SELECT oid FROM pg_namespace WHERE nspname NOT LIKE 'pg_%' AND nspname != 'information_schema')";
$table_names = $db->queryCol($query);
if (PEAR::isError($table_names)) {
return $table_names;
}
$result = array();
foreach ($table_names as $table_name) {
$result[] = $this->_fixSequenceName($table_name);
}
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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