includes/installer/OracleUpdater.php

   1 <?php
   2 /**
   3  * Oracle-specific updater.
   4  *
   5  * @file
   6  * @ingroup Deployment
   7  */
   8
   9 /**
  10  * Class for handling updates to Oracle databases.
  11  *
  12  * @ingroup Deployment
  13  * @since 1.17
  14  */
  15 class OracleUpdater extends DatabaseUpdater {
  16
  17         /**
  18          * Handle to the database subclass
  19          *
  20          * @var DatabaseOracle
  21          */
  22         protected $db;
  23
  24         protected function getCoreUpdateList() {
  25                 return array(
  26                         // 1.17
  27                         array( 'doNamespaceDefaults' ),
  28                         array( 'doFKRenameDeferr' ),
  29                         array( 'doFunctions17' ),
  30                         array( 'doSchemaUpgrade17' ),
  31                         array( 'doInsertPage0' ),
  32                         array( 'doRemoveNotNullEmptyDefaults' ),
  33                         array( 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ),
  34
  35                         //1.18
  36                         array( 'addIndex',      'user',          'i02',       'patch-user_email_index.sql' ),
  37                         array( 'modifyField', 'user_properties', 'up_property', 'patch-up_property.sql' ),
  38                         array( 'addTable', 'uploadstash', 'patch-uploadstash.sql' ),
  39
  40                         //1.19
  41                         array( 'addTable', 'config', 'patch-config.sql' ),
  42                         array( 'addIndex', 'logging',       'i05',      'patch-logging_type_action_index.sql'),
  43                         array( 'addTable', 'globaltemplatelinks', 'patch-globaltemplatelinks.sql' ),
  44                         array( 'addTable', 'globalnamespaces', 'patch-globalnamespaces.sql' ),
  45                         array( 'addTable', 'globalinterwiki', 'patch-globalinterwiki.sql' ),
  46
  47                         // till 2.0 i guess
  48                         array( 'doRebuildDuplicateFunction' ),
  49
  50                 );
  51         }
  52
  53         /**
  54          * MySQL uses datatype defaults for NULL inserted into NOT NULL fields
  55          * In namespace case that results into insert of 0 which is default namespace
  56          * Oracle inserts NULL, so namespace fields should have a default value
  57          */
  58         protected function doNamespaceDefaults() {
  59                 $this->output( "Altering namespace fields with default value ... " );
  60                 $meta = $this->db->fieldInfo( 'page', 'page_namespace' );
  61                 if ( $meta->defaultValue() != null ) {
  62                         $this->output( "defaults seem to present on namespace fields\n" );
  63                         return;
  64                 }
  65
  66                 $this->applyPatch( 'patch_namespace_defaults.sql', false );
  67                 $this->output( "ok\n" );
  68         }
  69
  70         /**
  71          * Uniform FK names + deferrable state
  72          */
  73         protected function doFKRenameDeferr() {
  74                 $this->output( "Altering foreign keys ... " );
  75                 $meta = $this->db->query( 'SELECT COUNT(*) cnt FROM user_constraints WHERE constraint_type = \'R\' AND deferrable = \'DEFERRABLE\'' );
  76                 $row = $meta->fetchRow();
  77                 if ( $row && $row['cnt'] > 0 ) {
  78                         $this->output( "at least one FK is deferrable, considering up to date\n" );
  79                         return;
  80                 }
  81
  82                 $this->applyPatch( 'patch_fk_rename_deferred.sql', false );
  83                 $this->output( "ok\n" );
  84         }
  85
  86         /**
  87          * Recreate functions to 17 schema layout
  88          */
  89         protected function doFunctions17() {
  90                 $this->output( "Recreating functions ... " );
  91                 $this->applyPatch( 'patch_create_17_functions.sql', false );
  92                 $this->output( "ok\n" );
  93         }
  94
  95         /**
  96          * Schema upgrade 16->17
  97          * there are no incremental patches prior to this
  98          */
  99         protected function doSchemaUpgrade17() {
 100                 $this->output( "Updating schema to 17 ... " );
 101                 // check if iwlinks table exists which was added in 1.17
 102                 if ( $this->db->tableExists( 'iwlinks' ) ) {
 103                         $this->output( "schema seem to be up to date.\n" );
 104                         return;
 105                 }
 106                 $this->applyPatch( 'patch_16_17_schema_changes.sql', false );
 107                 $this->output( "ok\n" );
 108         }
 109
 110         /**
 111          * Insert page (page_id = 0) to prevent FK constraint violation
 112          */
 113         protected function doInsertPage0() {
 114                 $this->output( "Inserting page 0 if missing ... " );
 115                 $row = array(
 116                         'page_id' => 0,
 117                         'page_namespace' => 0,
 118                         'page_title' => ' ',
 119                         'page_counter' => 0,
 120                         'page_is_redirect' => 0,
 121                         'page_is_new' => 0,
 122                         'page_random' => 0,
 123                         'page_touched' => $this->db->timestamp(),
 124                         'page_latest' => 0,
 125                         'page_len' => 0
 126                 );
 127                 $this->db->insert( 'page', $row, 'OracleUpdater:doInserPage0', array( 'IGNORE' ) );
 128                 $this->output( "ok\n" );
 129         }
 130
 131         /**
 132          * Remove DEFAULT '' NOT NULL constraints from fields as '' is internally
 133          * converted to NULL in Oracle
 134          */
 135         protected function doRemoveNotNullEmptyDefaults() {
 136                 $this->output( "Removing not null empty constraints ... " );
 137                 $meta = $this->db->fieldInfo( 'categorylinks' , 'cl_sortkey_prefix' );
 138                 if ( $meta->isNullable() ) {
 139                         $this->output( "constraints seem to be removed\n" );
 140                         return;
 141                 }
 142                 $this->applyPatch( 'patch_remove_not_null_empty_defs.sql', false );
 143                 $this->output( "ok\n" );
 144         }
 145
 146         /**
 147          * rebuilding of the function that duplicates tables for tests
 148          */
 149         protected function doRebuildDuplicateFunction() {
 150                 $this->output( "Rebuilding duplicate function ... " );
 151                 $this->applyPatch( 'patch_rebuild_dupfunc.sql', false );
 152                 $this->output( "ok\n" );
 153         }
 154
 155         /**
 156          * Overload: after this action field info table has to be rebuilt
 157          *
 158          * @param $what array
 159          */
 160         public function doUpdates( $what = array( 'core', 'extensions', 'purge', 'stats' ) ) {
 161                 parent::doUpdates( $what );
 162
 163                 $this->db->query( 'BEGIN fill_wiki_info; END;' );
 164         }
 165
 166 }