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doctrine2/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php

622 lines
19 KiB
PHP

<?php
/*
* $Id$
*
* 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 COPYRIGHT
* OWNER 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.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\DBAL\Platforms;
use Doctrine\DBAL\Schema\TableDiff;
/**
* PostgreSqlPlatform.
*
* @since 2.0
* @author Roman Borschel <roman@code-factory.org>
* @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)
* @author Benjamin Eberlei <kontakt@beberlei.de>
*/
class PostgreSqlPlatform extends AbstractPlatform
{
/**
* Returns part of a string.
*
* Note: Not SQL92, but common functionality.
*
* @param string $value the target $value the string or the string column.
* @param int $from extract from this characeter.
* @param int $len extract this amount of characters.
* @return string sql that extracts part of a string.
* @override
*/
public function getSubstringExpression($value, $from, $len = null)
{
if ($len === null) {
return 'SUBSTR(' . $value . ', ' . $from . ')';
} else {
return 'SUBSTR(' . $value . ', ' . $from . ', ' . $len . ')';
}
}
/**
* Returns the SQL string to return the current system date and time.
*
* @return string
*/
public function getNowExpression()
{
return 'LOCALTIMESTAMP(0)';
}
/**
* regexp
*
* @return string the regular expression operator
* @override
*/
public function getRegexpExpression()
{
return 'SIMILAR TO';
}
/**
* parses a literal boolean value and returns
* proper sql equivalent
*
* @param string $value boolean value to be parsed
* @return string parsed boolean value
*/
/*public function parseBoolean($value)
{
return $value;
}*/
/**
* Whether the platform supports sequences.
* Postgres has native support for sequences.
*
* @return boolean
*/
public function supportsSequences()
{
return true;
}
/**
* Whether the platform supports database schemas.
*
* @return boolean
*/
public function supportsSchemas()
{
return true;
}
/**
* Whether the platform supports identity columns.
* Postgres supports these through the SERIAL keyword.
*
* @return boolean
*/
public function supportsIdentityColumns()
{
return true;
}
/**
* Whether the platform prefers sequences for ID generation.
*
* @return boolean
*/
public function prefersSequences()
{
return true;
}
public function getListDatabasesSql()
{
return 'SELECT datname FROM pg_database';
}
public function getListSequencesSql($database)
{
return "SELECT
relname
FROM
pg_class
WHERE relkind = 'S' AND relnamespace IN
(SELECT oid FROM pg_namespace
WHERE nspname NOT LIKE 'pg_%' AND nspname != 'information_schema')";
}
public function getListTablesSql()
{
return "SELECT
c.relname AS table_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 table_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_'";
}
public function getListViewsSql($database)
{
return 'SELECT viewname, definition FROM pg_views';
}
public function getListTableForeignKeysSql($table, $database = null)
{
return "SELECT r.conname, pg_catalog.pg_get_constraintdef(r.oid, true) as condef
FROM pg_catalog.pg_constraint r
WHERE r.conrelid =
(
SELECT c.oid
FROM pg_catalog.pg_class c
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.relname = '" . $table . "' AND pg_catalog.pg_table_is_visible(c.oid)
)
AND r.contype = 'f'";
}
public function getCreateViewSql($name, $sql)
{
return 'CREATE VIEW ' . $name . ' AS ' . $sql;
}
public function getDropViewSql($name)
{
return 'DROP VIEW '. $name;
}
public function getListTableConstraintsSql($table)
{
return "SELECT
relname
FROM
pg_class
WHERE oid IN (
SELECT indexrelid
FROM pg_index, pg_class
WHERE pg_class.relname = '$table'
AND pg_class.oid = pg_index.indrelid
AND (indisunique = 't' OR indisprimary = 't')
)";
}
/**
* @license New BSD License
* @link http://ezcomponents.org/docs/api/trunk/DatabaseSchema/ezcDbSchemaPgsqlReader.html
* @param string $table
* @return string
*/
public function getListTableIndexesSql($table)
{
return "SELECT relname, pg_index.indisunique, pg_index.indisprimary,
pg_index.indkey, pg_index.indrelid
FROM pg_class, pg_index
WHERE oid IN (
SELECT indexrelid
FROM pg_index, pg_class
WHERE pg_class.relname='$table' AND pg_class.oid=pg_index.indrelid
) AND pg_index.indexrelid = oid";
}
public function getListTableColumnsSql($table)
{
return "SELECT
a.attnum,
a.attname AS field,
t.typname AS type,
format_type(a.atttypid, a.atttypmod) AS complete_type,
a.attnotnull AS isnotnull,
(SELECT 't'
FROM pg_index
WHERE c.oid = pg_index.indrelid
AND pg_index.indkey[0] = a.attnum
AND pg_index.indisprimary = 't'
) AS pri,
(SELECT pg_attrdef.adsrc
FROM pg_attrdef
WHERE c.oid = pg_attrdef.adrelid
AND pg_attrdef.adnum=a.attnum
) AS default
FROM pg_attribute a, pg_class c, pg_type t
WHERE c.relname = '$table'
AND a.attnum > 0
AND a.attrelid = c.oid
AND a.atttypid = t.oid
ORDER BY a.attnum";
}
/**
* create a new database
*
* @param string $name name of the database that should be created
* @throws PDOException
* @return void
* @override
*/
public function getCreateDatabaseSql($name)
{
return 'CREATE DATABASE ' . $name;
}
/**
* drop an existing database
*
* @param string $name name of the database that should be dropped
* @throws PDOException
* @access public
*/
public function getDropDatabaseSql($name)
{
return 'DROP DATABASE ' . $name;
}
/**
* getAdvancedForeignKeyOptions
* Return the FOREIGN KEY query section dealing with non-standard options
* as MATCH, INITIALLY DEFERRED, ON UPDATE, ...
*
* @param \Doctrine\DBAL\Schema\ForeignKeyConstraint $foreignKey foreign key definition
* @return string
* @override
*/
public function getAdvancedForeignKeyOptionsSql(\Doctrine\DBAL\Schema\ForeignKeyConstraint $foreignKey)
{
$query = '';
if ($foreignKey->hasOption('match')) {
$query .= ' MATCH ' . $foreignKey->getOption('match');
}
$query .= parent::getAdvancedForeignKeyOptionsSql($foreignKey);
if ($foreignKey->hasOption('deferrable') && $foreignKey->getOption('deferrable') !== false) {
$query .= ' DEFERRABLE';
} else {
$query .= ' NOT DEFERRABLE';
}
if ($foreignKey->hasOption('feferred') && $foreignKey->getOption('feferred') !== false) {
$query .= ' INITIALLY DEFERRED';
} else {
$query .= ' INITIALLY IMMEDIATE';
}
return $query;
}
/**
* generates the sql for altering an existing table on postgresql
*
* @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 *
* @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.
* @see Doctrine_Export::alterTable()
* @return array
* @override
*/
public function getAlterTableSql(TableDiff $diff)
{
$sql = array();
foreach ($diff->addedColumns as $column) {
$query = 'ADD ' . $this->getColumnDeclarationSql($column->getName(), $column->toArray());
$sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
}
foreach ($diff->removedColumns as $column) {
$query = 'DROP ' . $column->getName();
$sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
}
foreach ($diff->changedColumns AS $columnDiff) {
$oldColumnName = $columnDiff->oldColumnName;
$column = $columnDiff->column;
if ($columnDiff->hasChanged('type')) {
$type = $column->getType();
// here was a server version check before, but DBAL API does not support this anymore.
$query = 'ALTER ' . $oldColumnName . ' TYPE ' . $type->getSqlDeclaration($column->toArray(), $this);
$sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
}
if ($columnDiff->hasChanged('default')) {
$query = 'ALTER ' . $oldColumnName . ' SET ' . $this->getDefaultValueDeclarationSql($column->toArray());
$sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
}
if ($columnDiff->hasChanged('notnull')) {
$query = 'ALTER ' . $oldColumnName . ' ' . ($column->getNotNull() ? 'SET' : 'DROP') . ' NOT NULL';
$sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
}
}
foreach ($diff->renamedColumns as $oldColumnName => $column) {
$sql[] = 'ALTER TABLE ' . $diff->name . ' RENAME COLUMN ' . $oldColumnName . ' TO ' . $column->getName();
}
if ($diff->newName !== false) {
$sql[] = 'ALTER TABLE ' . $diff->name . ' RENAME TO ' . $diff->newName;
}
$sql = array_merge($sql, $this->_getAlterTableIndexForeignKeySql($diff));
return $sql;
}
/**
* Gets the SQL to create a sequence on this platform.
*
* @param \Doctrine\DBAL\Schema\Sequence $sequence
* @throws DoctrineException
*/
public function getCreateSequenceSql(\Doctrine\DBAL\Schema\Sequence $sequence)
{
return 'CREATE SEQUENCE ' . $sequence->getName() .
' INCREMENT BY ' . $sequence->getAllocationSize() .
' MINVALUE ' . $sequence->getInitialValue() .
' START ' . $sequence->getInitialValue();
}
/**
* Drop existing sequence
* @param \Doctrine\DBAL\Schema\Sequence $sequence
* @return string
*/
public function getDropSequenceSql($sequence)
{
if ($sequence instanceof \Doctrine\DBAL\Schema\Sequence) {
$sequence = $sequence->getName();
}
return 'DROP SEQUENCE ' . $sequence;
}
/**
* @param ForeignKeyConstraint|string $foreignKey
* @param Table|string $table
* @return string
*/
public function getDropForeignKeySql($foreignKey, $table)
{
return $this->getDropConstraintSql($foreignKey, $table);
}
/**
* Gets the SQL used to create a table.
*
* @param unknown_type $tableName
* @param array $columns
* @param array $options
* @return unknown
*/
protected function _getCreateTableSql($tableName, array $columns, array $options = array())
{
$queryFields = $this->getColumnDeclarationListSql($columns);
if (isset($options['primary']) && ! empty($options['primary'])) {
$keyColumns = array_unique(array_values($options['primary']));
$queryFields .= ', PRIMARY KEY(' . implode(', ', $keyColumns) . ')';
}
$query = 'CREATE TABLE ' . $tableName . ' (' . $queryFields . ')';
$sql[] = $query;
if (isset($options['indexes']) && ! empty($options['indexes'])) {
foreach ($options['indexes'] AS $index) {
$sql[] = $this->getCreateIndexSql($index, $tableName);
}
}
if (isset($options['foreignKeys'])) {
foreach ((array) $options['foreignKeys'] as $definition) {
$sql[] = $this->getCreateForeignKeySql($definition, $tableName);
}
}
return $sql;
}
/**
* Postgres wants boolean values converted to the strings 'true'/'false'.
*
* @param array $item
* @override
*/
public function convertBooleans($item)
{
if (is_array($item)) {
foreach ($item as $key => $value) {
if (is_bool($value) || is_numeric($item)) {
$item[$key] = ($value) ? 'true' : 'false';
}
}
} else {
if (is_bool($item) || is_numeric($item)) {
$item = ($item) ? 'true' : 'false';
}
}
return $item;
}
public function getSequenceNextValSql($sequenceName)
{
return "SELECT NEXTVAL('" . $sequenceName . "')";
}
public function getSetTransactionIsolationSql($level)
{
return 'SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL '
. $this->_getTransactionIsolationLevelSql($level);
}
/**
* @override
*/
public function getBooleanTypeDeclarationSql(array $field)
{
return 'BOOLEAN';
}
/**
* @override
*/
public function getIntegerTypeDeclarationSql(array $field)
{
if ( ! empty($field['autoincrement'])) {
return 'SERIAL';
}
return 'INT';
}
/**
* @override
*/
public function getBigIntTypeDeclarationSql(array $field)
{
if ( ! empty($field['autoincrement'])) {
return 'BIGSERIAL';
}
return 'BIGINT';
}
/**
* @override
*/
public function getSmallIntTypeDeclarationSql(array $field)
{
return 'SMALLINT';
}
/**
* @override
*/
public function getDateTimeTypeDeclarationSql(array $fieldDeclaration)
{
return 'TIMESTAMP(0) WITH TIME ZONE';
}
/**
* @override
*/
public function getDateTypeDeclarationSql(array $fieldDeclaration)
{
return 'DATE';
}
/**
* @override
*/
public function getTimeTypeDeclarationSql(array $fieldDeclaration)
{
return 'TIME';
}
/**
* @override
*/
protected function _getCommonIntegerTypeDeclarationSql(array $columnDef)
{
return '';
}
/**
* Gets the SQL snippet used to declare a VARCHAR column on the MySql platform.
*
* @params array $field
* @override
*/
public function getVarcharTypeDeclarationSql(array $field)
{
if ( ! isset($field['length'])) {
if (array_key_exists('default', $field)) {
$field['length'] = $this->getVarcharMaxLength();
} else {
$field['length'] = false;
}
}
$length = ($field['length'] <= $this->getVarcharMaxLength()) ? $field['length'] : false;
$fixed = (isset($field['fixed'])) ? $field['fixed'] : false;
return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(255)')
: ($length ? 'VARCHAR(' . $length . ')' : 'TEXT');
}
/** @override */
public function getClobTypeDeclarationSql(array $field)
{
return 'TEXT';
}
/**
* Get the platform name for this instance
*
* @return string
*/
public function getName()
{
return 'postgresql';
}
/**
* Gets the character casing of a column in an SQL result set.
*
* PostgreSQL returns all column names in SQL result sets in lowercase.
*
* @param string $column The column name for which to get the correct character casing.
* @return string The column name in the character casing used in SQL result sets.
*/
public function getSqlResultCasing($column)
{
return strtolower($column);
}
public function getDateTimeFormatString()
{
return 'Y-m-d H:i:sO';
}
/**
* Get the insert sql for an empty insert statement
*
* @param string $tableName
* @param string $identifierColumnName
* @return string $sql
*/
public function getEmptyIdentityInsertSql($quotedTableName, $quotedIdentifierColumnName)
{
return 'INSERT INTO ' . $quotedTableName . ' (' . $quotedIdentifierColumnName . ') VALUES (DEFAULT)';
}
/**
* @inheritdoc
*/
public function getTruncateTableSql($tableName, $cascade = false)
{
return 'TRUNCATE '.$tableName.' '.($cascade)?'CASCADE':'';
}
}