516 lines
15 KiB
PHP
516 lines
15 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\DBAL\Platforms;
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use Doctrine\DBAL\DBALException;
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use Doctrine\DBAL\Schema\Index;
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use Doctrine\DBAL\Schema\TableDiff;
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class DB2Platform extends AbstractPlatform
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{
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/**
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* Gets the SQL snippet used to declare a VARCHAR column type.
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*
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* @param array $field
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*/
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public function getVarcharTypeDeclarationSQL(array $field)
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{
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if ( ! isset($field['length'])) {
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if (array_key_exists('default', $field)) {
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$field['length'] = $this->getVarcharMaxLength();
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} else {
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$field['length'] = false;
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}
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}
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$length = ($field['length'] <= $this->getVarcharMaxLength()) ? $field['length'] : false;
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$fixed = (isset($field['fixed'])) ? $field['fixed'] : false;
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return $fixed ? ($length ? 'CHAR(' . $length . ')' : 'CHAR(255)')
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: ($length ? 'VARCHAR(' . $length . ')' : 'VARCHAR(255)');
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}
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/**
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* Gets the SQL snippet used to declare a CLOB column type.
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*
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* @param array $field
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*/
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public function getClobTypeDeclarationSQL(array $field)
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{
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// todo clob(n) with $field['length'];
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return 'CLOB(1M)';
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}
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/**
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* Gets the name of the platform.
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*
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* @return string
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*/
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public function getName()
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{
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return 'db2';
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}
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/**
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* Gets the SQL snippet that declares a boolean column.
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*
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* @param array $columnDef
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* @return string
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*/
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public function getBooleanTypeDeclarationSQL(array $columnDef)
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{
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return 'SMALLINT';
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}
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/**
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* Gets the SQL snippet that declares a 4 byte integer column.
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*
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* @param array $columnDef
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* @return string
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*/
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public function getIntegerTypeDeclarationSQL(array $columnDef)
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{
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return 'INTEGER' . $this->_getCommonIntegerTypeDeclarationSQL($columnDef);
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}
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/**
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* Gets the SQL snippet that declares an 8 byte integer column.
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*
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* @param array $columnDef
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* @return string
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*/
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public function getBigIntTypeDeclarationSQL(array $columnDef)
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{
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return 'BIGINT' . $this->_getCommonIntegerTypeDeclarationSQL($columnDef);
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}
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/**
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* Gets the SQL snippet that declares a 2 byte integer column.
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*
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* @param array $columnDef
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* @return string
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*/
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public function getSmallIntTypeDeclarationSQL(array $columnDef)
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{
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return 'SMALLINT' . $this->_getCommonIntegerTypeDeclarationSQL($columnDef);
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}
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/**
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* Gets the SQL snippet that declares common properties of an integer column.
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*
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* @param array $columnDef
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* @return string
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*/
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protected function _getCommonIntegerTypeDeclarationSQL(array $columnDef)
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{
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$autoinc = '';
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if ( ! empty($columnDef['autoincrement'])) {
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$autoinc = ' GENERATED BY DEFAULT AS IDENTITY';
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}
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return $autoinc;
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}
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/**
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* Obtain DBMS specific SQL to be used to create datetime fields in
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* statements like CREATE TABLE
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*
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* @param array $fieldDeclaration
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* @return string
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*/
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public function getDateTimeTypeDeclarationSQL(array $fieldDeclaration)
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{
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if (isset($fieldDeclaration['version']) && $fieldDeclaration['version'] == true) {
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return "TIMESTAMP(0) WITH DEFAULT";
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}
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return 'TIMESTAMP(0)';
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}
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/**
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* Obtain DBMS specific SQL to be used to create date fields in statements
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* like CREATE TABLE.
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*
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* @param array $fieldDeclaration
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* @return string
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*/
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public function getDateTypeDeclarationSQL(array $fieldDeclaration)
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{
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return 'DATE';
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}
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/**
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* Obtain DBMS specific SQL to be used to create time fields in statements
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* like CREATE TABLE.
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*
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* @param array $fieldDeclaration
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* @return string
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*/
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public function getTimeTypeDeclarationSQL(array $fieldDeclaration)
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{
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return 'TIME';
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}
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public function getListDatabasesSQL()
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{
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throw DBALException::notSupported(__METHOD__);
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}
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public function getListSequencesSQL($database)
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{
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throw DBALException::notSupported(__METHOD__);
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}
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public function getListTableConstraintsSQL($table)
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{
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throw DBALException::notSupported(__METHOD__);
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}
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/**
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* This code fragment is originally from the Zend_Db_Adapter_Db2 class.
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*
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* @license New BSD License
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* @param string $table
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* @return string
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*/
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public function getListTableColumnsSQL($table)
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{
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return "SELECT DISTINCT c.tabschema, c.tabname, c.colname, c.colno,
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c.typename, c.default, c.nulls, c.length, c.scale,
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c.identity, tc.type AS tabconsttype, k.colseq
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FROM syscat.columns c
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LEFT JOIN (syscat.keycoluse k JOIN syscat.tabconst tc
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ON (k.tabschema = tc.tabschema
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AND k.tabname = tc.tabname
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AND tc.type = 'P'))
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ON (c.tabschema = k.tabschema
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AND c.tabname = k.tabname
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AND c.colname = k.colname)
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WHERE UPPER(c.tabname) = UPPER('" . $table . "') ORDER BY c.colno";
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}
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public function getListTablesSQL()
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{
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return "SELECT NAME FROM SYSIBM.SYSTABLES WHERE TYPE = 'T'";
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}
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public function getListUsersSQL()
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{
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throw DBALException::notSupported(__METHOD__);
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}
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/**
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* Get the SQL to list all views of a database or user.
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*
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* @param string $database
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* @return string
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*/
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public function getListViewsSQL($database)
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{
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return "SELECT NAME, TEXT FROM SYSIBM.SYSVIEWS";
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}
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public function getListTableIndexesSQL($table)
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{
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return "SELECT NAME, COLNAMES, UNIQUERULE FROM SYSIBM.SYSINDEXES WHERE TBNAME = UPPER('" . $table . "')";
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}
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public function getListTableForeignKeysSQL($table)
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{
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return "SELECT TBNAME, RELNAME, REFTBNAME, DELETERULE, UPDATERULE, FKCOLNAMES, PKCOLNAMES ".
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"FROM SYSIBM.SYSRELS WHERE TBNAME = UPPER('".$table."')";
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}
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public function getCreateViewSQL($name, $sql)
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{
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return "CREATE VIEW ".$name." AS ".$sql;
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}
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public function getDropViewSQL($name)
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{
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return "DROP VIEW ".$name;
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}
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public function getDropSequenceSQL($sequence)
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{
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throw DBALException::notSupported(__METHOD__);
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}
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public function getSequenceNextValSQL($sequenceName)
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{
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throw DBALException::notSupported(__METHOD__);
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}
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public function getCreateDatabaseSQL($database)
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{
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return "CREATE DATABASE ".$database;
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}
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public function getDropDatabaseSQL($database)
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{
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return "DROP DATABASE ".$database.";";
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}
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public function supportsCreateDropDatabase()
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{
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return false;
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}
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/**
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* Gets the SQL specific for the platform to get the current date.
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*
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* @return string
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*/
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public function getCurrentDateSQL()
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{
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return 'VALUES CURRENT DATE';
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}
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/**
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* Gets the SQL specific for the platform to get the current time.
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*
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* @return string
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*/
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public function getCurrentTimeSQL()
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{
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return 'VALUES CURRENT TIME';
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}
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/**
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* Gets the SQL specific for the platform to get the current timestamp
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*
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* @return string
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*/
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public function getCurrentTimestampSQL()
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{
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return "VALUES CURRENT TIMESTAMP";
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}
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/**
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* Obtain DBMS specific SQL code portion needed to set an index
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* declaration to be used in statements like CREATE TABLE.
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*
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* @param string $name name of the index
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* @param Index $index index definition
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* @return string DBMS specific SQL code portion needed to set an index
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*/
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public function getIndexDeclarationSQL($name, Index $index)
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{
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return $this->getUniqueConstraintDeclarationSQL($name, $index);
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}
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/**
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* @param string $tableName
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* @param array $columns
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* @param array $options
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* @return array
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*/
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protected function _getCreateTableSQL($tableName, array $columns, array $options = array())
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{
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$indexes = array();
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if (isset($options['indexes'])) {
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$indexes = $options['indexes'];
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}
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$options['indexes'] = array();
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$sqls = parent::_getCreateTableSQL($tableName, $columns, $options);
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foreach ($indexes as $index => $definition) {
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$sqls[] = $this->getCreateIndexSQL($definition, $tableName);
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}
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return $sqls;
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}
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/**
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* Gets the SQL to alter an existing table.
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*
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* @param TableDiff $diff
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* @return array
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*/
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public function getAlterTableSQL(TableDiff $diff)
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{
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$sql = array();
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$queryParts = array();
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foreach ($diff->addedColumns AS $fieldName => $column) {
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$queryParts[] = 'ADD COLUMN ' . $this->getColumnDeclarationSQL($column->getName(), $column->toArray());
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}
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foreach ($diff->removedColumns AS $column) {
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$queryParts[] = 'DROP COLUMN ' . $column->getName();
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}
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foreach ($diff->changedColumns AS $columnDiff) {
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/* @var $columnDiff Doctrine\DBAL\Schema\ColumnDiff */
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$column = $columnDiff->column;
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$queryParts[] = 'ALTER ' . ($columnDiff->oldColumnName) . ' '
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. $this->getColumnDeclarationSQL($column->getName(), $column->toArray());
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}
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foreach ($diff->renamedColumns AS $oldColumnName => $column) {
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$queryParts[] = 'RENAME ' . $oldColumnName . ' TO ' . $column->getName();
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}
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if (count($queryParts) > 0) {
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$sql[] = 'ALTER TABLE ' . $diff->name . ' ' . implode(" ", $queryParts);
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}
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$sql = array_merge($sql, $this->_getAlterTableIndexForeignKeySQL($diff));
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if ($diff->newName !== false) {
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$sql[] = 'RENAME TABLE TO ' . $diff->newName;
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}
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return $sql;
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}
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public function getDefaultValueDeclarationSQL($field)
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{
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if (isset($field['notnull']) && $field['notnull'] && !isset($field['default'])) {
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if (in_array((string)$field['type'], array("Integer", "BigInteger", "SmallInteger"))) {
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$field['default'] = 0;
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} else if((string)$field['type'] == "DateTime") {
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$field['default'] = "00-00-00 00:00:00";
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} else if ((string)$field['type'] == "Date") {
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$field['default'] = "00-00-00";
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} else if((string)$field['type'] == "Time") {
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$field['default'] = "00:00:00";
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} else {
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$field['default'] = '';
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}
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}
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unset($field['default']); // @todo this needs fixing
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if (isset($field['version']) && $field['version']) {
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if ((string)$field['type'] != "DateTime") {
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$field['default'] = "1";
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}
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}
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return parent::getDefaultValueDeclarationSQL($field);
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}
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/**
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* Get the insert sql for an empty insert statement
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*
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* @param string $tableName
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* @param string $identifierColumnName
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* @return string $sql
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*/
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public function getEmptyIdentityInsertSQL($tableName, $identifierColumnName)
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{
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return 'INSERT INTO ' . $tableName . ' (' . $identifierColumnName . ') VALUES (DEFAULT)';
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}
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public function getCreateTemporaryTableSnippetSQL()
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{
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return "DECLARE GLOBAL TEMPORARY TABLE";
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}
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/**
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* DB2 automatically moves temporary tables into the SESSION. schema.
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*
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* @param string $tableName
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* @return string
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*/
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public function getTemporaryTableName($tableName)
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{
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return "SESSION." . $tableName;
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}
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public function modifyLimitQuery($query, $limit, $offset = null)
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{
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if ($limit === null && $offset === null) {
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return $query;
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}
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$limit = (int)$limit;
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$offset = (int)(($offset)?:0);
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// Todo OVER() needs ORDER BY data!
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$sql = 'SELECT db22.* FROM (SELECT ROW_NUMBER() OVER() AS DC_ROWNUM, db21.* '.
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'FROM (' . $query . ') db21) db22 WHERE db22.DC_ROWNUM BETWEEN ' . ($offset+1) .' AND ' . ($offset+$limit);
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return $sql;
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}
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/**
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* returns the position of the first occurrence of substring $substr in string $str
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*
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* @param string $substr literal string to find
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* @param string $str literal string
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* @param int $pos position to start at, beginning of string by default
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* @return integer
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*/
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public function getLocateExpression($str, $substr, $startPos = false)
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{
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if ($startPos == false) {
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return 'LOCATE(' . $substr . ', ' . $str . ')';
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} else {
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return 'LOCATE(' . $substr . ', ' . $str . ', '.$startPos.')';
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}
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}
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/**
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* return string to call a function to get a substring inside an SQL statement
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*
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* Note: Not SQL92, but common functionality.
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*
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* SQLite only supports the 2 parameter variant of this function
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*
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* @param string $value an sql string literal or column name/alias
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* @param integer $from where to start the substring portion
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* @param integer $len the substring portion length
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* @return string
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*/
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public function getSubstringExpression($value, $from, $len = null)
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{
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if ($len === null)
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return 'SUBSTR(' . $value . ', ' . $from . ')';
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else {
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return 'SUBSTR(' . $value . ', ' . $from . ', ' . $len . ')';
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}
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}
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public function supportsIdentityColumns()
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{
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return true;
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}
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public function prefersIdentityColumns()
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{
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return true;
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}
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/**
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* Gets the character casing of a column in an SQL result set of this platform.
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*
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* DB2 returns all column names in SQL result sets in uppercase.
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*
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* @param string $column The column name for which to get the correct character casing.
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* @return string The column name in the character casing used in SQL result sets.
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*/
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public function getSQLResultCasing($column)
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{
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return strtoupper($column);
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}
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} |