<?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;
/**
* PostgreSqlPlatform.
*
* @since 2.0
* @author Roman Borschel <roman@code-factory.org>
* @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)
*/
class PostgreSqlPlatform extends AbstractPlatform
{
/**
* Constructor.
* Creates a new PostgreSqlPlatform.
*/
public function __construct()
{
parent::__construct();
}
/**
* Obtain DBMS specific SQL code portion needed to declare an text type
* field to be used in statements like CREATE TABLE.
*
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* length
* Integer value that determines the maximum length of the text
* field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
*
* default
* Text 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 string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @override
*/
/*public function getNativeDeclaration(array $field)
{
if ( ! isset($field['type'])) {
throw DoctrineException::updateMe('Missing column type.');
}
switch ($field['type']) {
case 'char':
case 'string':
case 'array':
case 'object':
case 'varchar':
case 'gzip':
// TODO: what is the maximum VARCHAR length in pgsql ?
$length = (isset($field['length']) && $field['length'] && $field['length'] < 10000) ? $field['length'] : null;
$fixed = ((isset($field['fixed']) && $field['fixed']) || $field['type'] == 'char') ? true : false;
return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR('.$this->conn->options['default_text_field_length'].')')
: ($length ? 'VARCHAR(' .$length . ')' : 'TEXT');
case 'clob':
return 'TEXT';
case 'blob':
return 'BYTEA';
case 'enum':
case 'integer':
case 'int':
if ( ! empty($field['autoincrement'])) {
if ( ! empty($field['length'])) {
$length = $field['length'];
if ($length > 4) {
return 'BIGSERIAL';
}
}
return 'SERIAL';
}
if ( ! empty($field['length'])) {
$length = $field['length'];
if ($length <= 2) {
return 'SMALLINT';
} elseif ($length == 3 || $length == 4) {
return 'INT';
} elseif ($length > 4) {
return 'BIGINT';
}
}
return 'INT';
case 'boolean':
return 'BOOLEAN';
case 'date':
return 'DATE';
case 'time':
return 'TIME without time zone';
case 'timestamp':
return 'TIMESTAMP without time zone';
case 'float':
case 'double':
return 'FLOAT';
case 'decimal':
$length = !empty($field['length']) ? $field['length'] : 18;
$scale = !empty($field['scale']) ? $field['scale'] : $this->conn->getAttribute(Doctrine::ATTR_DECIMAL_PLACES);
return 'NUMERIC('.$length.','.$scale.')';
}
throw DoctrineException::updateMe('Unknown field type \'' . $field['type'] . '\'.');
}*/
/**
* Maps a native array description of a field to a portable Doctrine datatype and length
*
* @param array $field native field description
*
* @return array containing the various possible types, length, sign, fixed
* @override
*/
/*public function getPortableDeclaration(array $field)
{
$length = (isset($field['length'])) ? $field['length'] : null;
if ($length == '-1' && isset($field['atttypmod'])) {
$length = $field['atttypmod'] - 4;
}
if ((int)$length <= 0) {
$length = null;
}
$type = array();
$unsigned = $fixed = null;
if ( ! isset($field['name'])) {
$field['name'] = '';
}
$dbType = strtolower($field['type']);
switch ($dbType) {
case 'smallint':
case 'int2':
$type[] = 'integer';
$unsigned = false;
$length = 2;
if ($length == '2') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
}
break;
case 'int':
case 'int4':
case 'integer':
case 'serial':
case 'serial4':
$type[] = 'integer';
$unsigned = false;
$length = 4;
break;
case 'bigint':
case 'int8':
case 'bigserial':
case 'serial8':
$type[] = 'integer';
$unsigned = false;
$length = 8;
break;
case 'bool':
case 'boolean':
$type[] = 'boolean';
$length = 1;
break;
case 'text':
case 'varchar':
case 'interval':
case '_varchar':
$fixed = false;
case 'unknown':
case 'char':
case 'bpchar':
$type[] = 'string';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
} elseif (strstr($dbType, 'text')) {
$type[] = 'clob';
}
if ($fixed !== false) {
$fixed = true;
}
break;
case 'date':
$type[] = 'date';
$length = null;
break;
case 'datetime':
case 'timestamp':
case 'timestamptz':
$type[] = 'timestamp';
$length = null;
break;
case 'time':
$type[] = 'time';
$length = null;
break;
case 'float':
case 'float4':
case 'float8':
case 'double':
case 'double precision':
case 'real':
$type[] = 'float';
break;
case 'decimal':
case 'money':
case 'numeric':
$type[] = 'decimal';
break;
case 'tinyblob':
case 'mediumblob':
case 'longblob':
case 'blob':
case 'bytea':
$type[] = 'blob';
$length = null;
break;
case 'oid':
$type[] = 'blob';
$type[] = 'clob';
$length = null;
break;
case 'year':
$type[] = 'integer';
$type[] = 'date';
$length = null;
break;
default:
throw DoctrineException::updateMe('unknown database attribute type: '.$dbType);
}
return array('type' => $type,
'length' => $length,
'unsigned' => $unsigned,
'fixed' => $fixed);
}*/
/**
* Returns the md5 sum of a field.
*
* Note: Not SQL92, but common functionality
*
* md5() works with the default PostgreSQL 8 versions.
*
* If you are using PostgreSQL 7.x or older you need
* to make sure that the digest procedure is installed.
* If you use RPMS (Redhat and Mandrake) install the postgresql-contrib
* package. You must then install the procedure by running this shell command:
* <code>
* psql [dbname] < /usr/share/pgsql/contrib/pgcrypto.sql
* </code>
* You should make sure you run this as the postgres user.
*
* @return string
* @override
*/
public function getMd5Expression($column)
{
$column = $this->quoteIdentifier($column);
if ($this->_version > 7) {
return 'MD5(' . $column . ')';
} else {
return 'encode(digest(' . $column .', md5), hex)';
}
}
/**
* 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)
{
$value = $this->quoteIdentifier($value);
if ($len === null) {
$len = $this->quoteIdentifier($len);
return 'SUBSTR(' . $value . ', ' . $from . ')';
} else {
return 'SUBSTR(' . $value . ', ' . $from . ', ' . $len . ')';
}
}
/**
* PostgreSQLs AGE(<timestamp1> [, <timestamp2>]) function.
*
* @param string $timestamp1 timestamp to subtract from NOW()
* @param string $timestamp2 optional; if given: subtract arguments
* @return string
*/
public function getAgeExpression($timestamp1, $timestamp2 = null)
{
if ( $timestamp2 == null ) {
return 'AGE(' . $timestamp1 . ')';
}
return 'AGE(' . $timestamp1 . ', ' . $timestamp2 . ')';
}
/**
* PostgreSQLs DATE_PART( <text>, <time> ) function.
*
* @param string $text what to extract
* @param string $time timestamp or interval to extract from
* @return string
*/
public function getDatePartExpression($text, $time)
{
return 'DATE_PART(' . $text . ', ' . $time . ')';
}
/**
* PostgreSQLs TO_CHAR( <time>, <text> ) function.
*
* @param string $time timestamp or interval
* @param string $text how to the format the output
* @return string
*/
public function getToCharExpression($time, $text)
{
return 'TO_CHAR(' . $time . ', ' . $text . ')';
}
/**
* 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';
}
/**
* return string to call a function to get random value inside an SQL statement
*
* @return return string to generate float between 0 and 1
* @access public
* @override
*/
public function getRandomExpression()
{
return 'RANDOM()';
}
/**
* build a pattern matching string
*
* EXPERIMENTAL
*
* WARNING: this function is experimental and may change signature at
* any time until labelled as non-experimental
*
* @access public
*
* @param array $pattern even keys are strings, odd are patterns (% and _)
* @param string $operator optional pattern operator (LIKE, ILIKE and maybe others in the future)
* @param string $field optional field name that is being matched against
* (might be required when emulating ILIKE)
*
* @return string SQL pattern
* @override
*/
public function getMatchPatternExpression($pattern, $operator = null, $field = null)
{
$match = '';
if ( ! is_null($operator)) {
$field = is_null($field) ? '' : $field.' ';
$operator = strtoupper($operator);
switch ($operator) {
// case insensitive
case 'ILIKE':
$match = $field.'ILIKE ';
break;
// case sensitive
case 'LIKE':
$match = $field.'LIKE ';
break;
default:
throw DoctrineException::updateMe('not a supported operator type:'. $operator);
}
}
$match.= "'";
foreach ($pattern as $key => $value) {
if ($key % 2) {
$match.= $value;
} else {
$match.= $this->conn->escapePattern($this->conn->escape($value));
}
}
$match.= "'";
$match.= $this->patternEscapeString();
return $match;
}
/**
* 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 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;
}
/**
* Enter description here...
*
* @override
*/
public function getListDatabasesSql()
{
return 'SELECT datname FROM pg_database';
}
/**
* Enter description here...
*
* @override
*/
public function getListFunctionsSql()
{
return "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'";
}
/**
* Enter description here...
*
* @override
*/
public function getListSequencesSql()
{
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')";
}
/**
* Enter description here...
*
* @override
*/
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_'";
}
/**
* Enter description here...
*
* @override
*/
public function getListViewsSql()
{
return 'SELECT viewname FROM pg_views';
}
/**
* Enter description here...
*
* @override
*/
public function getListUsersSql()
{
return 'SELECT usename FROM pg_user';
}
/**
* Enter description here...
*
* @override
*/
public function getListTableConstraintsSql()
{
return "SELECT
relname
FROM
pg_class
WHERE oid IN (
SELECT indexrelid
FROM pg_index, pg_class
WHERE pg_class.relname = %s
AND pg_class.oid = pg_index.indrelid
AND (indisunique = 't' OR indisprimary = 't')
)";
}
/**
* Enter description here...
*
* @override
*/
public function getListTableIndexesSql()
{
return "SELECT
relname
FROM
pg_class
WHERE oid IN (
SELECT indexrelid
FROM pg_index, pg_class
WHERE pg_class.relname = %s
AND pg_class.oid=pg_index.indrelid
AND indisunique != 't'
AND indisprimary != 't'
)";
}
/**
* Enter description here...
*
* @override
*/
public function getListTableColumnsSql()
{
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 = %s
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 ' . $this->quoteIdentifier($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 ' . $this->quoteIdentifier($name);
}
/**
* getAdvancedForeignKeyOptions
* Return the FOREIGN KEY query section dealing with non-standard options
* as MATCH, INITIALLY DEFERRED, ON UPDATE, ...
*
* @param array $definition foreign key definition
* @return string
* @override
*/
public function getAdvancedForeignKeyOptionsSql(array $definition)
{
$query = '';
if (isset($definition['match'])) {
$query .= ' MATCH ' . $definition['match'];
}
if (isset($definition['onUpdate'])) {
$query .= ' ON UPDATE ' . $definition['onUpdate'];
}
if (isset($definition['onDelete'])) {
$query .= ' ON DELETE ' . $definition['onDelete'];
}
if (isset($definition['deferrable'])) {
$query .= ' DEFERRABLE';
} else {
$query .= ' NOT DEFERRABLE';
}
if (isset($definition['feferred'])) {
$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 $check indicates whether the function should just check if the DBMS driver
* can perform the requested table alterations if the value is true or
* actually perform them otherwise.
* @see Doctrine_Export::alterTable()
* @return array
* @override
*/
public function getAlterTableSql($name, array $changes, $check = false)
{
foreach ($changes as $changeName => $change) {
switch ($changeName) {
case 'add':
case 'remove':
case 'change':
case 'name':
case 'rename':
break;
default:
throw DoctrineException::updateMe('change type "' . $changeName . '\" not yet supported');
}
}
if ($check) {
return true;
}
$sql = array();
if (isset($changes['add']) && is_array($changes['add'])) {
foreach ($changes['add'] as $fieldName => $field) {
$query = 'ADD ' . $this->getColumnDeclarationSql($fieldName, $field);
$sql[] = 'ALTER TABLE ' . $name . ' ' . $query;
}
}
if (isset($changes['remove']) && is_array($changes['remove'])) {
foreach ($changes['remove'] as $fieldName => $field) {
$fieldName = $this->quoteIdentifier($fieldName, true);
$query = 'DROP ' . $fieldName;
$sql[] = 'ALTER TABLE ' . $name . ' ' . $query;
}
}
if (isset($changes['change']) && is_array($changes['change'])) {
foreach ($changes['change'] as $fieldName => $field) {
$fieldName = $this->quoteIdentifier($fieldName, true);
if (isset($field['type'])) {
$serverInfo = $this->getServerVersion();
if (is_array($serverInfo) && $serverInfo['major'] < 8) {
throw DoctrineException::updateMe('changing column type for "'.$field['type'].'\" requires PostgreSQL 8.0 or above');
}
$query = 'ALTER ' . $fieldName . ' TYPE ' . $this->getTypeDeclarationSql($field['definition']);
$sql[] = 'ALTER TABLE ' . $name . ' ' . $query;
}
if (array_key_exists('default', $field)) {
$query = 'ALTER ' . $fieldName . ' SET DEFAULT ' . $this->quote($field['definition']['default'], $field['definition']['type']);
$sql[] = 'ALTER TABLE ' . $name . ' ' . $query;
}
if ( ! empty($field['notnull'])) {
$query = 'ALTER ' . $fieldName . ' ' . ($field['definition']['notnull'] ? 'SET' : 'DROP') . ' NOT NULL';
$sql[] = 'ALTER TABLE ' . $name . ' ' . $query;
}
}
}
if (isset($changes['rename']) && is_array($changes['rename'])) {
foreach ($changes['rename'] as $fieldName => $field) {
$fieldName = $this->quoteIdentifier($fieldName, true);
$sql[] = 'ALTER TABLE ' . $name . ' RENAME COLUMN ' . $fieldName . ' TO ' . $this->quoteIdentifier($field['name'], true);
}
}
$name = $this->quoteIdentifier($name, true);
if (isset($changes['name'])) {
$changeName = $this->quoteIdentifier($changes['name'], true);
$sql[] = 'ALTER TABLE ' . $name . ' RENAME TO ' . $changeName;
}
return $sql;
}
/**
* {@inheritdoc}
*
* @return string
* @override
*/
public function getCreateSequenceSql($sequenceName, $start = 1, $allocationSize = 1)
{
return 'CREATE SEQUENCE ' . $this->quoteIdentifier($sequenceName)
. ' INCREMENT BY ' . $allocationSize . ' START ' . $start;
}
/**
* drop existing sequence
*
* @param string $sequenceName name of the sequence to be dropped
* @override
*/
public function getDropSequenceSql($sequenceName)
{
return 'DROP SEQUENCE ' . $this->quoteIdentifier($sequenceName);
}
/**
* Gets the SQL used to create a table.
*
* @param unknown_type $name
* @param array $fields
* @param array $options
* @return unknown
*/
public function getCreateTableSql($name, array $fields, array $options = array())
{
$queryFields = $this->getColumnDeclarationListSql($fields);
if (isset($options['primary']) && ! empty($options['primary'])) {
$keyColumns = array_unique(array_values($options['primary']));
$keyColumns = array_map(array($this, 'quoteIdentifier'), $keyColumns);
$queryFields .= ', PRIMARY KEY(' . implode(', ', $keyColumns) . ')';
}
$query = 'CREATE TABLE ' . $this->quoteIdentifier($name) . ' (' . $queryFields . ')';
$sql[] = $query;
if (isset($options['indexes']) && ! empty($options['indexes'])) {
foreach($options['indexes'] as $index => $definition) {
$sql[] = $this->getCreateIndexSql($name, $index, $definition);
}
}
if (isset($options['foreignKeys'])) {
foreach ((array) $options['foreignKeys'] as $k => $definition) {
if (is_array($definition)) {
$sql[] = $this->getCreateForeignKeySql($name, $definition);
}
}
}
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;
}
/**
* Enter description here...
*
* @param string $sequenceName
* @override
*/
public function getSequenceNextValSql($sequenceName)
{
return "SELECT NEXTVAL('" . $sequenceName . "')";
}
/**
* Enter description here...
*
* @param unknown_type $level
* @override
*/
public function getSetTransactionIsolationSql($level)
{
return 'SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL '
. $this->_getTransactionIsolationLevelSql($level);
}
/**
* @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
*/
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');
}
}